security(auth): wire @require_permission(owner_check=True) on isolation routes

Apply the require_permission decorator to all 28 routes that take a
{thread_id} path parameter. Combined with the strict middleware
(previous commit), this gives the double-layer protection that
AUTH_TEST_PLAN test 7.5.9 documents:

  Layer 1 (AuthMiddleware): cookie + JWT validation, rejects junk
                            cookies and stamps request.state.user
  Layer 2 (@require_permission with owner_check=True): per-resource
                            ownership verification via
                            ThreadMetaStore.check_access — returns
                            404 if a different user owns the thread

The decorator's owner_check branch is rewritten to use the SQL
thread_meta_repo (the 2.0-rc persistence layer) instead of the
LangGraph store path that PR #1728 used (_store_get / get_store
in routers/threads.py). The inject_record convenience is dropped
— no caller in 2.0 needs the LangGraph blob, and the SQL repo has
a different shape.

Routes decorated (28 total):
- threads.py: delete, patch, get, get-state, post-state, post-history
- thread_runs.py: post-runs, post-runs-stream, post-runs-wait,
  list_runs, get_run, cancel_run, join_run, stream_existing_run,
  list_thread_messages, list_run_messages, list_run_events,
  thread_token_usage
- feedback.py: create, list, stats, delete
- uploads.py: upload (added Request param), list, delete
- artifacts.py: get_artifact
- suggestions.py: generate (renamed body parameter to avoid
  conflict with FastAPI Request)

Test fixes:
- test_suggestions_router.py: bypass the decorator via __wrapped__
  (the unit tests cover parsing logic, not auth — no point spinning
  up a thread_meta_repo just to test JSON unwrapping)
- test_auth_middleware.py 4 fake-cookie tests: already updated in
  the previous commit (745bf432)

Tests: 293 passed (auth + persistence + isolation + suggestions)
Lint: clean

.dockerignore

@@ -3,6 +3,7 @@ Dockerfile
 .dockerignore
 .git
 .gitignore
+docker/
 
 # Python
 __pycache__/
@@ -51,3 +52,20 @@ examples/
 assets/
 tests/
 *.log
+
+# Exclude directories not needed in Docker context
+# Frontend build only needs frontend/
+# Backend build only needs backend/
+scripts/
+logs/
+docker/
+skills/
+frontend/.next
+frontend/node_modules
+backend/.venv
+backend/htmlcov
+backend/.coverage
+*.md
+!README.md
+!frontend/README.md
+!backend/README.md

.env.example

@@ -1,128 +1,41 @@
-# Application Settings
-# Set to True to enable debug-level logging (shows detailed LLM prompts and responses)
-# Recommended for development and troubleshooting
-DEBUG=True
-APP_ENV=development
+# TAVILY API Key
+TAVILY_API_KEY=your-tavily-api-key
 
-# Frontend API URL (used as Docker build arg for Next.js)
-# This is a BUILD-TIME variable: it gets embedded into the frontend JS bundle during build.
-# Default works for local development (localhost). For remote/LAN deployment, change to your host IP or domain:
-#   NEXT_PUBLIC_API_URL=http://192.168.1.100:8000/api
-#   NEXT_PUBLIC_API_URL=https://your-domain.com/api
-# Note: When using docker-compose, only this root .env is used (not web/.env).
-# If you change this value after building, you must rebuild: docker compose build
-NEXT_PUBLIC_API_URL="http://localhost:8000/api"
+# Jina API Key
+JINA_API_KEY=your-jina-api-key
 
-AGENT_RECURSION_LIMIT=30
+# InfoQuest API Key
+INFOQUEST_API_KEY=your-infoquest-api-key
+# CORS Origins (comma-separated) - e.g., http://localhost:3000,http://localhost:3001
+# CORS_ORIGINS=http://localhost:3000
 
-# CORS settings
-# Comma-separated list of allowed origins for CORS requests
-# Example: ALLOWED_ORIGINS=http://localhost:3000,http://example.com
-ALLOWED_ORIGINS=http://localhost:3000
+# Optional:
+# FIRECRAWL_API_KEY=your-firecrawl-api-key
+# VOLCENGINE_API_KEY=your-volcengine-api-key
+# OPENAI_API_KEY=your-openai-api-key
+# GEMINI_API_KEY=your-gemini-api-key
+# DEEPSEEK_API_KEY=your-deepseek-api-key
+# NOVITA_API_KEY=your-novita-api-key  # OpenAI-compatible, see https://novita.ai
+# MINIMAX_API_KEY=your-minimax-api-key  # OpenAI-compatible, see https://platform.minimax.io
+# VLLM_API_KEY=your-vllm-api-key  # OpenAI-compatible
+# FEISHU_APP_ID=your-feishu-app-id
+# FEISHU_APP_SECRET=your-feishu-app-secret
 
-# Enable or disable MCP server configuration, the default is false.
-# Please enable this feature before securing your front-end and back-end in a managed environment.
-# Otherwise, you system could be compromised.
-ENABLE_MCP_SERVER_CONFIGURATION=false
+# SLACK_BOT_TOKEN=your-slack-bot-token
+# SLACK_APP_TOKEN=your-slack-app-token
+# TELEGRAM_BOT_TOKEN=your-telegram-bot-token
 
-# Enable or disable PYTHON_REPL configuration, the default is false.
-# Please enable this feature before securing your in a managed environment.
-# Otherwise, you system could be compromised.
-ENABLE_PYTHON_REPL=false
-
-# Search Engine, Supported values: tavily, infoquest (recommended), duckduckgo, brave_search, arxiv, searx, serper
-SEARCH_API=tavily
-TAVILY_API_KEY=tvly-xxx
-INFOQUEST_API_KEY="infoquest-xxx"
-# SERPER_API_KEY=xxx # Required only if SEARCH_API is serper
-# SEARX_HOST=xxx # Required only if SEARCH_API is searx.(compatible with both Searx and SearxNG)
-# BRAVE_SEARCH_API_KEY=xxx # Required only if SEARCH_API is brave_search
-# JINA_API_KEY=jina_xxx # Optional, default is None
-
-# Optional, RAG provider
-# RAG_PROVIDER=vikingdb_knowledge_base
-# VIKINGDB_KNOWLEDGE_BASE_API_URL="api-knowledgebase.mlp.cn-beijing.volces.com"
-# VIKINGDB_KNOWLEDGE_BASE_API_AK="AKxxx"
-# VIKINGDB_KNOWLEDGE_BASE_API_SK=""
-# VIKINGDB_KNOWLEDGE_BASE_RETRIEVAL_SIZE=15
-
-# RAG_PROVIDER=ragflow
-# RAGFLOW_API_URL="http://localhost:9388"
-# RAGFLOW_API_KEY="ragflow-xxx"
-# RAGFLOW_RETRIEVAL_SIZE=10
-# RAGFLOW_CROSS_LANGUAGES=English,Chinese,Spanish,French,German,Japanese,Korean # Optional. To use RAGFlow's cross-language search, please separate each language with a single comma
-
-# RAG_PROVIDER=dify
-# DIFY_API_URL="https://api.dify.ai/v1"
-# DIFY_API_KEY="dataset-xxx"
-
-# MOI is a hybrid database that mainly serves enterprise users (https://www.matrixorigin.io/matrixone-intelligence)
-# RAG_PROVIDER=moi
-# MOI_API_URL="https://cluster.matrixonecloud.cn"
-# MOI_API_KEY="xxx-xxx-xxx-xxx"
-# MOI_RETRIEVAL_SIZE=10
-# MOI_LIST_LIMIT=10
-
-
-# RAG_PROVIDER: milvus  (using free milvus instance on zilliz cloud: https://docs.zilliz.com/docs/quick-start )
-# RAG_PROVIDER=milvus
-# MILVUS_URI=<endpoint_of_self_hosted_milvus_or_zilliz_cloud>
-# MILVUS_USER=<username_of_self_hosted_milvus_or_zilliz_cloud>
-# MILVUS_PASSWORD=<password_of_self_hosted_milvus_or_zilliz_cloud>
-# MILVUS_COLLECTION=documents
-# MILVUS_EMBEDDING_PROVIDER=openai # support openai,dashscope
-# MILVUS_EMBEDDING_BASE_URL=
-# MILVUS_EMBEDDING_MODEL=
-# MILVUS_EMBEDDING_API_KEY=
-# MILVUS_AUTO_LOAD_EXAMPLES=true
-
-# RAG_PROVIDER: milvus  (using milvus lite on Mac or Linux)
-# RAG_PROVIDER=milvus
-# MILVUS_URI=./milvus_demo.db
-# MILVUS_COLLECTION=documents
-# MILVUS_EMBEDDING_PROVIDER=openai # support openai,dashscope
-# MILVUS_EMBEDDING_BASE_URL=
-# MILVUS_EMBEDDING_MODEL=
-# MILVUS_EMBEDDING_API_KEY=
-# MILVUS_AUTO_LOAD_EXAMPLES=true
-
-# RAG_PROVIDER: qdrant (using qdrant cloud or self-hosted: https://qdrant.tech/documentation/quick-start/)
-# RAG_PROVIDER=qdrant
-# QDRANT_LOCATION=https://xyz-example.eu-central.aws.cloud.qdrant.io:6333
-# QDRANT_API_KEY=<your_qdrant_api_key>  # Optional, only for cloud/authenticated instances
-# QDRANT_COLLECTION=documents
-# QDRANT_EMBEDDING_PROVIDER=openai  # support openai,dashscope
-# QDRANT_EMBEDDING_BASE_URL=
-# QDRANT_EMBEDDING_MODEL=text-embedding-ada-002
-# QDRANT_EMBEDDING_API_KEY=
-# QDRANT_AUTO_LOAD_EXAMPLES=true
-
-# Optional, volcengine TTS for generating podcast
-VOLCENGINE_TTS_APPID=xxx
-VOLCENGINE_TTS_ACCESS_TOKEN=xxx
-# VOLCENGINE_TTS_CLUSTER=volcano_tts # Optional, default is volcano_tts
-# VOLCENGINE_TTS_VOICE_TYPE=BV700_V2_streaming # Optional, default is BV700_V2_streaming
-
-# Optional, for langsmith tracing and monitoring
-# Highly recommended for production debugging and performance monitoring
-# Get your API key from https://smith.langchain.com/
+# Enable LangSmith to monitor and debug your LLM calls, agent runs, and tool executions.
 # LANGSMITH_TRACING=true
-# LANGSMITH_ENDPOINT="https://api.smith.langchain.com"
-# LANGSMITH_API_KEY="xxx"
-# LANGSMITH_PROJECT="xxx"
+# LANGSMITH_ENDPOINT=https://api.smith.langchain.com
+# LANGSMITH_API_KEY=your-langsmith-api-key
+# LANGSMITH_PROJECT=your-langsmith-project
 
-# Optional, LangChain verbose logging
-# Enable these to see detailed LLM interactions in console/logs
-# Useful for debugging but can be very verbose
-# LANGCHAIN_VERBOSE=true
-# LANGCHAIN_DEBUG=true
+# GitHub API Token
+# GITHUB_TOKEN=your-github-token
 
-# [!NOTE]
-# For model settings and other configurations, please refer to `docs/configuration_guide.md`
-
-# Option, for langgraph mongodb checkpointer
-# Enable LangGraph checkpoint saver, supports MongoDB, Postgres
-#LANGGRAPH_CHECKPOINT_SAVER=true
-# Set the database URL for saving checkpoints
-#LANGGRAPH_CHECKPOINT_DB_URL=mongodb://localhost:27017/
-#LANGGRAPH_CHECKPOINT_DB_URL=postgresql://localhost:5432/postgres
+# Database (only needed when config.yaml has database.backend: postgres)
+# DATABASE_URL=postgresql://deerflow:password@localhost:5432/deerflow
+#
+# WECOM_BOT_ID=your-wecom-bot-id
+# WECOM_BOT_SECRET=your-wecom-bot-secret

.gitattributes

@@ -0,0 +1,43 @@
+# Normalize line endings to LF for all text files
+* text=auto eol=lf
+
+# Shell scripts and makefiles must always use LF
+*.sh text eol=lf
+Makefile text eol=lf
+**/Makefile text eol=lf
+
+# Common config/source files
+*.yml text eol=lf
+*.yaml text eol=lf
+*.toml text eol=lf
+*.json text eol=lf
+*.md text eol=lf
+*.py text eol=lf
+*.ts text eol=lf
+*.tsx text eol=lf
+*.js text eol=lf
+*.jsx text eol=lf
+*.css text eol=lf
+*.scss text eol=lf
+*.html text eol=lf
+*.env text eol=lf
+
+# Windows scripts
+*.bat text eol=crlf
+*.cmd text eol=crlf
+
+# Binary assets
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.webp binary
+*.ico binary
+*.pdf binary
+*.zip binary
+*.tar binary
+*.gz binary
+*.mp4 binary
+*.mov binary
+*.woff binary
+*.woff2 binary

.github/ISSUE_TEMPLATE/runtime-information.yml

@@ -0,0 +1,128 @@
+name: Runtime Information
+description: Report runtime/environment details to help reproduce an issue.
+title: "[runtime] "
+labels:
+  - needs-triage
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for sharing runtime details.
+        Complete this form so maintainers can quickly reproduce and diagnose the problem.
+
+  - type: input
+    id: summary
+    attributes:
+      label: Problem summary
+      description: Short summary of the issue.
+      placeholder: e.g. make dev fails to start gateway service
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+      placeholder: What did you expect to happen?
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual
+    attributes:
+      label: Actual behavior
+      placeholder: What happened instead? Include key error lines.
+    validations:
+      required: true
+
+  - type: dropdown
+    id: os
+    attributes:
+      label: Operating system
+      options:
+        - macOS
+        - Linux
+        - Windows
+        - Other
+    validations:
+      required: true
+
+  - type: input
+    id: platform_details
+    attributes:
+      label: Platform details
+      description: Add architecture and shell if relevant.
+      placeholder: e.g. arm64, zsh
+
+  - type: input
+    id: python_version
+    attributes:
+      label: Python version
+      placeholder: e.g. Python 3.12.9
+
+  - type: input
+    id: node_version
+    attributes:
+      label: Node.js version
+      placeholder: e.g. v23.11.0
+
+  - type: input
+    id: pnpm_version
+    attributes:
+      label: pnpm version
+      placeholder: e.g. 10.26.2
+
+  - type: input
+    id: uv_version
+    attributes:
+      label: uv version
+      placeholder: e.g. 0.7.20
+
+  - type: dropdown
+    id: run_mode
+    attributes:
+      label: How are you running DeerFlow?
+      options:
+        - Local (make dev)
+        - Docker (make docker-dev)
+        - CI
+        - Other
+    validations:
+      required: true
+
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: Reproduction steps
+      description: Provide exact commands and sequence.
+      placeholder: |
+        1. make check
+        2. make install
+        3. make dev
+        4. ...
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant logs
+      description: Paste key lines from logs (for example logs/gateway.log, logs/frontend.log).
+      render: shell
+    validations:
+      required: true
+
+  - type: textarea
+    id: git_info
+    attributes:
+      label: Git state
+      description: Share output of git branch and latest commit SHA.
+      placeholder: |
+        branch: feature/my-branch
+        commit: abcdef1
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional context
+      description: Add anything else that might help triage.

.github/copilot-instructions.md

@@ -1,303 +1,213 @@
-# GitHub Copilot Instructions for DeerFlow
+# Copilot Onboarding Instructions for DeerFlow
 
-This file provides guidance to GitHub Copilot when working with the DeerFlow repository.
+Use this file as the default operating guide for this repository. Follow it first, and only search the codebase when this file is incomplete or incorrect.
 
-## Project Overview
+## 1) Repository Summary
 
-**DeerFlow** (Deep Exploration and Efficient Research Flow) is a community-driven Deep Research framework built on LangGraph. It orchestrates AI agents to conduct deep research, generate reports, and create content like podcasts and presentations.
+DeerFlow is a full-stack "super agent harness".
 
-### Technology Stack
+- Backend: Python 3.12, LangGraph + FastAPI gateway, sandbox/tool system, memory, MCP integration.
+- Frontend: Next.js 16 + React 19 + TypeScript + pnpm.
+- Local dev entrypoint: root `Makefile` starts backend + frontend + nginx on `http://localhost:2026`.
+- Docker dev entrypoint: `make docker-*` (mode-aware provisioner startup from `config.yaml`).
 
-- **Backend**: Python 3.12+, FastAPI, LangGraph, LangChain
-- **Frontend**: Next.js (React), TypeScript, pnpm
-- **Package Management**: uv (Python), pnpm (Node.js)
-- **Testing**: pytest (Python), Jest (JavaScript)
-- **Linting/Formatting**: Ruff (Python), ESLint/Prettier (JavaScript)
+Current repo footprint is medium-large (backend service, frontend app, docker stack, skills library, docs).
 
-## Architecture Overview
+## 2) Runtime and Toolchain Requirements
 
-### Core Components
+Validated in this repo on macOS:
 
-1. **Multi-Agent System**: Built on LangGraph with state-based workflows
-   - **Coordinator**: Entry point managing workflow lifecycle
-   - **Planner**: Decomposes research objectives into structured plans
-   - **Research Team**: Specialized agents (Researcher, Coder) executing plans
-   - **Reporter**: Aggregates findings and generates final reports
-   - **Human-in-the-loop**: Interactive plan modification and approval
+- Node.js `>=22` (validated with Node `23.11.0`)
+- pnpm (repo expects lockfile generated by pnpm 10; validated with pnpm `10.26.2` and `10.15.0`)
+- Python `>=3.12` (CI uses `3.12`)
+- `uv` (validated with `0.7.20`)
+- `nginx` (required for `make dev` unified local endpoint)
 
-2. **State Management**
-   - Uses LangGraph StateGraph for agent communication
-   - MemorySaver for conversation persistence
-   - Checkpointing with MongoDB/PostgreSQL support
+Always run from repo root unless a command explicitly says otherwise.
 
-3. **External Integrations**
-   - Search engines: Tavily, Brave Search, DuckDuckGo
-   - Web crawling: Jina for content extraction
-   - TTS: Volcengine TTS API
-   - RAG: RAGFlow and VikingDB support
-   - MCP: Model Context Protocol integration
+## 3) Build/Test/Lint/Run - Verified Command Sequences
 
-### Directory Structure
+These were executed and validated in this repository.
 
-```
-src/
-├── agents/          # Agent definitions and behaviors
-├── config/          # Configuration management (YAML, env vars)
-├── crawler/         # Web crawling and content extraction
-├── graph/           # LangGraph workflow definitions
-├── llms/            # LLM provider integrations (OpenAI, DeepSeek, etc.)
-├── prompts/         # Agent prompt templates
-├── server/          # FastAPI web server and endpoints
-├── tools/           # External tools (search, TTS, Python REPL)
-└── rag/             # RAG integration for private knowledgebases
+### A. Bootstrap and install
 
-web/                 # Next.js web UI (React, TypeScript)
-├── src/app/         # Next.js pages and API routes
-├── src/components/  # UI components and design system
-└── src/core/        # Frontend utilities and state management
+1. Check prerequisites:
 
-tests/               # Test suite
-├── unit/            # Unit tests
-└── integration/     # Integration tests
-```
-
-## Development Workflow
-
-### Environment Setup
-
-1. **Python Environment**:
-   ```bash
-   # Use uv for dependency management
-   uv sync
-   
-   # For development dependencies
-   uv pip install -e ".[dev]"
-   uv pip install -e ".[test]"
-   ```
-
-2. **Configuration Files**:
-   ```bash
-   # Copy and configure environment files
-   cp .env.example .env
-   cp conf.yaml.example conf.yaml
-   ```
-
-3. **Frontend Setup**:
-   ```bash
-   cd web/
-   pnpm install
-   ```
-
-### Running the Application
-
-- **Backend Development Server**: `uv run server.py --reload`
-- **Console UI**: `uv run main.py`
-- **Frontend Development**: `cd web && pnpm dev`
-- **Full Stack**: `./bootstrap.sh -d` (macOS/Linux) or `bootstrap.bat -d` (Windows)
-- **LangGraph Studio**: `make langgraph-dev`
-
-### Testing
-
-- **Python Tests**: `make test` or `pytest tests/`
-- **Python Coverage**: `make coverage`
-- **Frontend Tests**: `cd web && pnpm test:run`
-- **Frontend Lint**: `make lint-frontend`
-
-### Code Quality
-
-- **Python Formatting**: `make format` (uses Ruff)
-- **Python Linting**: `make lint` (uses Ruff)
-- **Frontend Linting**: `cd web && pnpm lint`
-- **Frontend Type Check**: `cd web && pnpm typecheck`
-
-## Coding Standards
-
-### Python Code
-
-1. **Style Guidelines**:
-   - Follow PEP 8 guidelines
-   - Use type hints wherever possible
-   - Line length: 88 characters (Ruff default)
-   - Python version requirement: >= 3.12
-
-2. **Code Organization**:
-   - Write clear, documented code with descriptive docstrings
-   - Keep functions and methods focused and single-purpose
-   - Comment complex logic
-   - Use meaningful variable and function names
-
-3. **Testing Requirements**:
-   - Add tests for new features in `tests/` directory
-   - Maintain test coverage (minimum 25%)
-   - Use pytest fixtures for test setup
-   - Test both unit and integration scenarios
-
-4. **LangGraph Patterns**:
-   - Agents communicate via LangGraph state
-   - Each agent has specific tool permissions
-   - Use persistent checkpoints for conversation history
-   - Follow the node → edge → state pattern
-
-### TypeScript/JavaScript Code
-
-1. **Style Guidelines**:
-   - Use TypeScript for type safety
-   - Follow ESLint configuration
-   - Use Prettier for consistent formatting
-   - Prefer functional components with hooks
-
-2. **Component Structure**:
-   - Place UI components in `web/src/components/`
-   - Use the established design system
-   - Keep components focused and reusable
-   - Export types alongside components
-
-3. **API Integration**:
-   - API utilities in `web/src/core/api/`
-   - Handle errors gracefully
-   - Use proper TypeScript types for API responses
-
-## Configuration Management
-
-### Environment Variables (.env)
-
-Key environment variables to configure:
-- `TAVILY_API_KEY`: Web search integration
-- `BRAVE_SEARCH_API_KEY`: Alternative search engine
-- `LANGSMITH_API_KEY`: LangSmith tracing (optional)
-- `LANGGRAPH_CHECKPOINT_DB_URL`: MongoDB/PostgreSQL for persistence
-- `RAGFLOW_API_URL`: RAG integration
-
-### Application Configuration (conf.yaml)
-
-- LLM model configurations
-- Provider-specific settings
-- Search engine preferences
-- MCP server configurations
-
-## Common Development Tasks
-
-### Adding New Features
-
-1. **New Agent**:
-   - Add agent definition in `src/agents/`
-   - Update graph in `src/graph/builder.py`
-   - Register agent tools in prompts
-
-2. **New Tool**:
-   - Implement tool in `src/tools/`
-   - Register in agent prompts
-   - Add tests for tool functionality
-
-3. **New Workflow**:
-   - Create graph builder in `src/[feature]/graph/builder.py`
-   - Define state management
-   - Add nodes and edges
-
-4. **Frontend Component**:
-   - Add component to `web/src/components/`
-   - Update API in `web/src/core/api/`
-   - Add corresponding types
-
-### Debugging
-
-- **LangGraph Studio**: `make langgraph-dev` for visual workflow debugging
-- **LangSmith**: Configure `LANGSMITH_API_KEY` for tracing
-- **Server Logs**: Check FastAPI server output for backend issues
-- **Browser DevTools**: Use for frontend debugging
-
-## Important Patterns
-
-### Agent Communication
-- Agents communicate through LangGraph state
-- State is preserved across checkpoints
-- Use proper type annotations for state
-
-### Content Generation Pipeline
-1. Planning: Planner creates research plan
-2. Research: Researcher gathers information
-3. Processing: Coder analyzes data/code
-4. Reporting: Reporter synthesizes findings
-5. Post-processing: Optional podcast/PPT generation
-
-### Error Handling
-- Use try-except blocks with specific exception types
-- Log errors with appropriate context
-- Provide meaningful error messages to users
-- Handle API failures gracefully
-
-### Async Operations
-- Use async/await for I/O operations
-- Properly handle concurrent operations
-- Use appropriate timeout values
-- Clean up resources in finally blocks
-
-## Pre-commit Hooks
-
-The repository uses pre-commit hooks for code quality:
 ```bash
-chmod +x pre-commit
-ln -s ../../pre-commit .git/hooks/pre-commit
+make check
 ```
 
-## Dependencies
+Observed: passes when required tools are installed.
 
-### Adding New Dependencies
+2. Install dependencies (recommended order: backend then frontend, as implemented by `make install`):
 
-- **Python**: Add to `pyproject.toml` dependencies, then run `uv sync`
-- **JavaScript**: Use `pnpm add <package>` in the `web/` directory
+```bash
+make install
+```
 
-### Dependency Updates
+### B. Backend CI-equivalent validation
 
-- Keep dependencies up to date
-- Test thoroughly after updates
-- Check compatibility with Python 3.12+ and Node.js 22+
+Run from `backend/`:
 
-## Documentation
+```bash
+make lint
+make test
+```
 
-### When to Update Documentation
+Validated results:
 
-- New features: Update relevant docs in `docs/` directory
-- API changes: Update `docs/API.md`
-- Configuration changes: Update `docs/configuration_guide.md`
-- Breaking changes: Clearly document in README and CONTRIBUTING
+- `make lint`: pass (`ruff check .`)
+- `make test`: pass (`277 passed, 15 warnings in ~76.6s`)
 
-### Documentation Style
+CI parity:
 
-- Use clear, concise language
-- Include code examples where applicable
-- Keep documentation in sync with code
-- Use markdown formatting consistently
+- `.github/workflows/backend-unit-tests.yml` runs on pull requests.
+- CI executes `uv sync --group dev`, then `make lint`, then `make test` in `backend/`.
 
-## Security Considerations
+### C. Frontend validation
 
-- Never commit API keys or secrets to the repository
-- Use `.env` files for sensitive configuration
-- Validate and sanitize user inputs
-- Follow security best practices for web applications
-- Be cautious with code execution features
+Run from `frontend/`.
 
-## Community Guidelines
+Recommended reliable sequence:
 
-- Be respectful and inclusive
-- Follow the MIT License terms
-- Give constructive feedback in code reviews
-- Help others learn and grow
-- Stay focused on improving the project
+```bash
+pnpm lint
+pnpm typecheck
+BETTER_AUTH_SECRET=local-dev-secret pnpm build
+```
 
-## Getting Help
+Observed failure modes and workarounds:
 
-- Check existing documentation in `docs/`
-- Review `Agent.md` for architecture details
-- See `CONTRIBUTING` for contribution guidelines
-- Check GitHub issues for known problems
-- Join community discussions for support
+- `pnpm build` fails without `BETTER_AUTH_SECRET` in production-mode env validation.
+- Workaround: set `BETTER_AUTH_SECRET` (best) or set `SKIP_ENV_VALIDATION=1`.
+- Even with `SKIP_ENV_VALIDATION=1`, Better Auth can still warn/error in logs about default secret; prefer setting a real non-default secret.
+- `pnpm check` currently fails (`next lint` invocation is incompatible here and resolves to an invalid directory). Do not rely on `pnpm check`; run `pnpm lint` and `pnpm typecheck` explicitly.
 
-## Additional Resources
+### D. Run locally (all services)
 
-- Main README: Comprehensive project overview
-- Agent.md: Detailed architecture and agent guidance
-- CONTRIBUTING: Full contribution guidelines
-- docs/configuration_guide.md: Configuration details
-- docs/API.md: API documentation
-- docs/mcp_integrations.md: MCP integration guide
+From root:
+
+```bash
+make dev
+```
+
+Behavior:
+
+- Stops existing local services first.
+- Starts LangGraph (`2024`), Gateway (`8001`), Frontend (`3000`), nginx (`2026`).
+- Unified app endpoint: `http://localhost:2026`.
+- Logs: `logs/langgraph.log`, `logs/gateway.log`, `logs/frontend.log`, `logs/nginx.log`.
+
+Stop services:
+
+```bash
+make stop
+```
+
+If tool sessions/timeouts interrupt `make dev`, run `make stop` again to ensure cleanup.
+
+### E. Config bootstrap
+
+From root:
+
+```bash
+make config
+```
+
+Important behavior:
+
+- This intentionally aborts if `config.yaml` (or `config.yml`/`configure.yml`) already exists.
+- Use `make config` only for first-time setup in a clean clone.
+
+## 4) Command Order That Minimizes Failures
+
+Use this exact order for local code changes:
+
+1. `make check`
+2. `make install` (if frontend fails with proxy errors, rerun frontend install with proxy vars unset)
+3. Backend checks: `cd backend && make lint && make test`
+4. Frontend checks: `cd frontend && pnpm lint && pnpm typecheck`
+5. Frontend build (if UI changes or release-sensitive changes): `BETTER_AUTH_SECRET=... pnpm build`
+
+Always run backend lint/tests before opening PRs because that is what CI enforces.
+
+## 5) Project Layout and Architecture (High-Value Paths)
+
+Root-level orchestration and config:
+
+- `Makefile` - main local/dev/docker command entrypoints
+- `config.example.yaml` - primary app config template
+- `config.yaml` - local active config (gitignored)
+- `docker/docker-compose-dev.yaml` - Docker dev topology
+- `.github/workflows/backend-unit-tests.yml` - PR validation workflow
+
+Backend core:
+
+- `backend/packages/harness/deerflow/agents/` - lead agent, middleware chain, memory
+- `backend/app/gateway/` - FastAPI gateway API
+- `backend/packages/harness/deerflow/sandbox/` - sandbox provider + tool wrappers
+- `backend/packages/harness/deerflow/subagents/` - subagent registry/execution
+- `backend/packages/harness/deerflow/mcp/` - MCP integration
+- `backend/langgraph.json` - graph entrypoint (`deerflow.agents:make_lead_agent`)
+- `backend/pyproject.toml` - Python deps and `requires-python`
+- `backend/ruff.toml` - lint/format policy
+- `backend/tests/` - backend unit and integration-like tests
+
+Frontend core:
+
+- `frontend/src/app/` - Next.js routes/pages
+- `frontend/src/components/` - UI components
+- `frontend/src/core/` - app logic (threads, tools, API, models)
+- `frontend/src/env.js` - env schema/validation (critical for build behavior)
+- `frontend/package.json` - scripts/deps
+- `frontend/eslint.config.js` - lint rules
+- `frontend/tsconfig.json` - TS config
+
+Skills and assets:
+
+- `skills/public/` - built-in skill packs loaded by agent runtime
+
+## 6) Pre-Checkin / Validation Expectations
+
+Before submitting changes, run at minimum:
+
+- Backend: `cd backend && make lint && make test`
+- Frontend (if touched): `cd frontend && pnpm lint && pnpm typecheck`
+- Frontend build when changing env/auth/routing/build-sensitive files: `BETTER_AUTH_SECRET=... pnpm build`
+
+If touching orchestration/config (`Makefile`, `docker/*`, `config*.yaml`), also run `make dev` and verify the four services start.
+
+## 7) Non-Obvious Dependencies and Gotchas
+
+- Proxy env vars can silently break frontend network operations (`pnpm install`/registry access).
+- `BETTER_AUTH_SECRET` is effectively required for reliable frontend production build validation.
+- Next.js may warn about multiple lockfiles and workspace root inference; this is currently a warning, not a build blocker.
+- `make config` is non-idempotent by design when config already exists.
+- `make dev` includes process cleanup and can emit shutdown logs/noise if interrupted; this is expected.
+
+## 8) Root Inventory (quick reference)
+
+Important root entries:
+
+- `.github/`
+- `backend/`
+- `frontend/`
+- `docker/`
+- `skills/`
+- `scripts/`
+- `docs/`
+- `README.md`
+- `CONTRIBUTING.md`
+- `Makefile`
+- `config.example.yaml`
+- `extensions_config.example.json`
+
+## 9) Instruction Priority
+
+Trust this onboarding guide first.
+
+Only do broad repo searches (`grep/find/code search`) when:
+
+- you need file-level implementation details not listed here,
+- a command here fails and you need updated replacement behavior,
+- or CI/workflow definitions have changed since this file was written.

.github/workflows/backend-unit-tests.yml

@@ -0,0 +1,40 @@
+name: Unit Tests
+
+on:
+  push:
+    branches: [ 'main' ]
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+
+concurrency:
+  group: unit-tests-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  backend-unit-tests:
+    if: github.event.pull_request.draft == false
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.12'
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
+
+      - name: Install backend dependencies
+        working-directory: backend
+        run: uv sync --group dev
+
+      - name: Run unit tests of backend
+        working-directory: backend
+        run: make test

.github/workflows/container.yaml

@@ -1,95 +0,0 @@
-name: Publish Containers
-
-on:
-  push:
-    branches:
-      - main-1.x
-  release:
-    types: [published]
-  workflow_dispatch:
-
-jobs:
-
-  backend-container:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
-      attestations: write
-      id-token: write
-    env:
-      REGISTRY: ghcr.io
-      IMAGE_NAME: ${{ github.repository }}
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Log in to the Container registry
-        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 #v3.4.0
-        with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Extract metadata (tags, labels) for Docker
-        id: meta
-        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 #v5.7.0
-        with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
-      - name: Build and push Docker image
-        id: push
-        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 #v6.18.0
-        with:
-          context: .
-          file: Dockerfile
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-
-      - name: Generate artifact attestation
-        uses: actions/attest-build-provenance@v2
-        with:
-          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
-          subject-digest: ${{ steps.push.outputs.digest }}
-          push-to-registry: true
-
-  frontend-container:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
-      attestations: write
-      id-token: write
-    env:
-      REGISTRY: ghcr.io
-      IMAGE_NAME: ${{ github.repository }}-web
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Log in to the Container registry
-        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 #v3.4.0
-        with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Extract metadata (tags, labels) for Docker
-        id: meta
-        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 #v5.7.0
-        with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
-      - name: Build and push Docker image
-        id: push
-        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 #v6.18.0
-        with:
-          context: web
-          file: web/Dockerfile
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-
-      - name: Generate artifact attestation
-        uses: actions/attest-build-provenance@v2
-        with:
-          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
-          subject-digest: ${{ steps.push.outputs.digest }}
-          push-to-registry: true

.github/workflows/lint-check.yml

@@ -0,0 +1,74 @@
+name: Lint Check
+
+on:
+  push:
+    branches: [ 'main' ]
+  pull_request:
+    branches: [ '*' ]
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.12'
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
+
+      - name: Install dependencies
+        working-directory: backend
+        run: |
+          uv sync --group dev
+
+      - name: Lint backend
+        working-directory: backend
+        run: make lint
+
+  lint-frontend:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+
+      - name: Enable Corepack
+        run: corepack enable
+
+      - name: Use pinned pnpm version
+        run: corepack prepare pnpm@10.26.2 --activate
+
+      - name: Install frontend dependencies
+        run: |
+          cd frontend
+          pnpm install --frozen-lockfile
+
+      - name: Check frontend formatting
+        run: |
+          cd frontend
+          pnpm format
+
+      - name: Run frontend linting
+        run: |
+          cd frontend
+          pnpm lint
+
+      - name: Check TypeScript types
+        run: |
+          cd frontend
+          pnpm typecheck
+
+      - name: Build frontend
+        run: |
+          cd frontend
+          BETTER_AUTH_SECRET=local-dev-secret pnpm build

.github/workflows/lint.yaml

@@ -1,69 +0,0 @@
-name: Lint Check
-
-on:
-  push:
-    branches: [ 'main' ]
-  pull_request:
-    branches: [ '*' ]
-
-permissions:
-  contents: read
-
-jobs:
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-
-    - name: Install the latest version of uv
-      uses: astral-sh/setup-uv@d9e0f98d3fc6adb07d1e3d37f3043649ddad06a1 #v6.5.0
-      with:
-        version: "latest"
-
-    - name: Install dependencies
-      run: |
-        uv venv --python 3.12
-        uv pip install -e ".[dev]"
-
-    - name: Run linters
-      run: |
-        source .venv/bin/activate
-        make lint
-
-  lint-frontend:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-
-    - name: Setup Node.js
-      uses: actions/setup-node@v4
-      with:
-        node-version: '22'
-
-    - name: Install pnpm
-      run: npm install -g pnpm
-
-    - name: Install frontend dependencies
-      run: |
-        cd web
-        pnpm install --frozen-lockfile
-
-    - name: Run frontend linting
-      run: |
-        cd web
-        pnpm lint
-
-    - name: Check TypeScript types
-      run: |
-        cd web
-        pnpm typecheck
-
-    - name: Running the frontend tests 
-      run: |
-        cd web
-        pnpm test:run
-
-    - name: Build frontend
-      run: |
-        cd web
-        pnpm build

.github/workflows/unittest.yaml

@@ -1,73 +0,0 @@
-name: Test Cases Check
-
-on:
-  push:
-    branches: [ 'main' ]
-  pull_request:
-    branches: [ '*' ]
-
-permissions:
-  contents: read
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    services:
-      postgres:
-        image: postgres:15
-        env:
-          POSTGRES_DB: checkpointing_db
-          POSTGRES_USER: postgres
-          POSTGRES_PASSWORD: postgres
-        ports: ["5432:5432"]
-        options: >-
-          --health-cmd pg_isready
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 5
-      mongodb:
-        image: mongo:6
-        env:
-          MONGO_INITDB_ROOT_USERNAME: admin
-          MONGO_INITDB_ROOT_PASSWORD: admin
-          MONGO_INITDB_DATABASE: checkpointing_db
-        ports: ["27017:27017"]
-        options: >-
-          --health-cmd "mongosh --eval 'db.runCommand(\"ping\").ok'"
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 3
-    steps:
-    - uses: actions/checkout@v3
-
-    - name: Install the latest version of uv
-      uses: astral-sh/setup-uv@d9e0f98d3fc6adb07d1e3d37f3043649ddad06a1 #v6.5.0
-      with:
-        version: "latest"
-
-    - name: Install dependencies
-      run: |
-        uv venv --python 3.12
-        uv pip install -e ".[dev]"
-        uv pip install -e ".[test]"
-
-    - name: Run test cases with coverage
-      run: |
-        source .venv/bin/activate
-        TAVILY_API_KEY=mock-key DB_TESTS_ENABLED=true make coverage
-
-    - name: Generate HTML Coverage Report
-      run: |
-        source .venv/bin/activate
-        python -m coverage html -d coverage_html
-
-    - name: Upload Coverage Report
-      uses: actions/upload-artifact@v4
-      with:
-        name: coverage-report
-        path: coverage_html/
-        
-    - name: Display Coverage Summary
-      run: |
-        source .venv/bin/activate
-        python -m coverage report

.gitignore

@@ -1,14 +1,20 @@
-# Python-generated files
+# DeerFlow docker image cache
+docker/.cache/
+# oh-my-claudecode state
+.omc/
+# OS generated files
+.DS_Store
+*.local
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Python cache
 __pycache__/
-*.py[oc]
-build/
-dist/
-wheels/
-*.egg-info
-.coverage
-.coverage.*
-agent_history.gif
-static/browser_history/*.gif
+*.pyc
+*.pyo
 
 # Virtual environments
 .venv
@@ -17,16 +23,37 @@ venv/
 # Environment variables
 .env
 
-# user conf
-conf.yaml
+# Configuration files
+config.yaml
+mcp_config.json
+extensions_config.json
 
+# IDE
 .idea/
-.langgraph_api/
-.DS_Store
+.vscode/
 
-# coverage report
+# Coverage report
 coverage.xml
 coverage/
+.deer-flow/
+.claude/
+skills/custom/*
+logs/
+log/
 
-# Temporary PPT content files
-ppt_content_*.md
+# Local git hooks (keep only on this machine, do not push)
+.githooks/
+
+# pnpm
+.pnpm-store
+sandbox_image_cache.tar
+
+# ignore the legacy `web` folder
+web/
+
+# Deployment artifacts
+backend/Dockerfile.langgraph
+config.yaml.bak
+.playwright-mcp
+.gstack/
+.worktrees

.vscode/launch.json

@@ -1,121 +0,0 @@
-{
-    "version": "0.2.0",
-    "configurations": [
-        
-        {
-            "name": "Debug Tests",
-            "type": "debugpy",
-            "request": "launch",
-            "module": "pytest",
-            "args": [
-                "${workspaceFolder}/tests",
-                "-v",
-                "-s"
-            ],
-            "console": "integratedTerminal",
-            "justMyCode": false,
-            "env": {
-                "PYTHONPATH": "${workspaceFolder}"
-            }
-        },
-        {
-            "name": "Debug Current Test File",
-            "type": "debugpy",
-            "request": "launch",
-            "module": "pytest",
-            "args": [
-                "${file}",
-                "-v",
-                "-s"
-            ],
-            "console": "integratedTerminal",
-            "justMyCode": false
-        },
-        {
-            "name": "Python: 当前文件",
-            "type": "debugpy",
-            "request": "launch",
-            "program": "${file}",
-            "console": "integratedTerminal",
-            "justMyCode": true
-        },
-        {
-            "name": "Python: main.py",
-            "type": "debugpy",
-            "request": "launch",
-            "program": "${workspaceFolder}/main.py",
-            "console": "integratedTerminal",
-            "justMyCode": false,
-            "env": {
-                "PYTHONPATH": "${workspaceFolder}"
-            },
-            "args": [
-                "--debug", "--max_plan_iterations", "1", "--max_step_num", "1"
-            ]
-        },
-        {
-            "name": "Python: llm.py",
-            "type": "debugpy",
-            "request": "launch",
-            "program": "${workspaceFolder}/src/llms/llm.py",
-            "console": "integratedTerminal",
-            "justMyCode": true,
-            "env": {
-                "PYTHONPATH": "${workspaceFolder}"
-            }
-        },
-        {
-            "name": "Python: server.py",
-            "type": "debugpy",
-            "request": "launch",
-            "program": "${workspaceFolder}/server.py",
-            "console": "integratedTerminal",
-            "justMyCode": false,
-            "env": {
-                "PYTHONPATH": "${workspaceFolder}"
-            }
-        },
-        {
-            "name": "Python: graph.py",
-            "type": "debugpy",
-            "request": "launch",
-            "program": "${workspaceFolder}/src/ppt/graph/builder.py",
-            "console": "integratedTerminal",
-            "justMyCode": false,
-            "env": {
-                "PYTHONPATH": "${workspaceFolder}"
-            }
-        },
-        {
-            "name": "Debug: python server",
-            "type": "debugpy",
-            "request": "launch",
-            "program": "${workspaceFolder}/server.py",
-            "console": "integratedTerminal",
-            "justMyCode": false,
-            "env": {
-                "PYTHONPATH": "${workspaceFolder}"
-            },
-            "args": [
-                "--reload"
-            ]
-        },
-        {
-            "name": "Debug: nodejs web",
-            "type": "node",
-            "request": "launch",
-            "runtimeExecutable": "pnpm",
-            "runtimeArgs": [
-                "dev"
-            ],
-            "cwd": "${workspaceFolder}/web",
-            "console": "integratedTerminal"
-        },
-    ],
-    "compounds": [
-        {
-            "name": "Launch Deerflow",
-            "configurations": ["Debug: python server", "Debug: nodejs web"]
-        }
-    ]
-}

.vscode/settings.json

@@ -1,8 +0,0 @@
-{
-    "python.defaultInterpreterPath": "${workspaceFolder}/.venv/bin/python",
-    "python.testing.pytestArgs": [
-        "tests"
-    ],
-    "python.testing.unittestEnabled": false,
-    "python.testing.pytestEnabled": true
-}

Agent.md

@@ -1,186 +0,0 @@
-# Agent.md
-
-This file provides guidance to AI agents when working with code in this repository.
-
-## Architecture Overview
-
-**DeerFlow** is a multi-agent research framework built on LangGraph that orchestrates AI agents to conduct deep research, generate reports, and create content like podcasts and presentations.
-
-### Core Architecture
-
-The system uses a **modular multi-agent architecture** with these key components:
-
-- **Coordinator**: Entry point managing workflow lifecycle
-- **Planner**: Decomposes research objectives into structured plans
-- **Research Team**: Specialized agents (Researcher, Coder) executing plans
-- **Reporter**: Aggregates findings and generates final reports
-- **Human-in-the-loop**: Interactive plan modification and approval
-
-### Graph Structure
-
-Built on **LangGraph** with state-based workflows:
-- **StateGraph** manages agent communication
-- **MemorySaver** provides conversation persistence
-- **Checkpointing** supports MongoDB/PostgreSQL storage
-- **Nodes**: coordinator → planner → research_team → reporter
-
-### Key Directories
-
-```
-src/
-├── agents/          # Agent definitions and behaviors
-├── config/          # Configuration management (YAML, env vars)
-├── crawler/         # Web crawling and content extraction
-├── graph/           # LangGraph workflow definitions
-├── llms/            # LLM provider integrations (OpenAI, DeepSeek, etc.)
-├── prompts/         # Agent prompt templates
-├── server/          # FastAPI web server and endpoints
-├── tools/           # External tools (search, TTS, Python REPL)
-└── rag/             # RAG integration for private knowledgebases
-
-web/                 # Next.js web UI (React, TypeScript)
-├── src/app/         # Next.js pages and API routes
-├── src/components/  # UI components and design system
-└── src/core/        # Frontend utilities and state management
-```
-
-## Development Commands
-
-### Backend (Python)
-```bash
-# Install dependencies
-uv sync
-
-# Development server
-uv run server.py --reload
-
-# Console UI
-uv run main.py
-
-# Run tests
-make test                    # Run all tests
-make coverage               # Run tests with coverage
-pytest tests/unit/test_*.py # Run specific test file
-
-# Code quality
-make lint                   # Ruff linting
-make format                 # Ruff formatting
-
-# LangGraph Studio (debugging)
-make langgraph-dev          # Start LangGraph development server
-```
-
-### Frontend (Web UI)
-```bash
-cd web/
-pnpm install                # Install dependencies
-pnpm dev                    # Development server (localhost:3000)
-pnpm build                  # Production build
-pnpm typecheck              # Type checking
-pnpm lint                   # ESLint
-pnpm format:write           # Prettier formatting
-```
-
-### Full Stack Development
-```bash
-# Run both backend and frontend
-./bootstrap.sh -d           # macOS/Linux
-bootstrap.bat -d           # Windows
-```
-
-### Docker
-```bash
-# Build and run
-make build                  # Build Docker image
-docker compose up          # Run with Docker Compose
-
-# Production deployment
-docker build -t deer-flow-api .
-docker run -p 8000:8000 deer-flow-api
-```
-
-### Fix GitHub issues
-create a branch named `fix/<issue-number>` to address specific GitHub issues.
-
-## Configuration
-
-### Environment Setup
-```bash
-# Required: Copy example configs
-cp .env.example .env
-cp conf.yaml.example conf.yaml
-
-# Key environment variables:
-# TAVILY_API_KEY          # Web search
-# BRAVE_SEARCH_API_KEY    # Alternative search
-# LANGSMITH_API_KEY       # LangSmith tracing (optional)
-# LANGGRAPH_CHECKPOINT_DB_URL  # MongoDB/PostgreSQL for persistence
-```
-
-### LangGraph Studio
-```bash
-# Local debugging with checkpointing
-uvx --refresh --from "langgraph-cli[inmem]" --with-editable . --python 3.12 langgraph dev --allow-blocking
-```
-
-## Common Development Tasks
-
-### Testing
-```bash
-# Unit tests
-pytest tests/unit/
-
-# Integration tests
-pytest tests/integration/
-
-# Specific component
-pytest tests/unit/config/test_configuration.py
-
-# With coverage
-pytest --cov=src tests/ --cov-report=html
-```
-
-### Code Quality
-```bash
-# Format code
-make format
-
-# Check linting
-make lint
-
-# Type checking (frontend)
-cd web && pnpm typecheck
-```
-
-### Adding New Features
-1. **New Agent**: Add agent in `src/agents/` + update graph in `src/graph/builder.py`
-2. **New Tool**: Add tool in `src/tools/` + register in agent prompts
-3. **New Workflow**: Create graph builder in `src/[feature]/graph/builder.py`
-4. **Frontend Component**: Add to `web/src/components/` + update API in `web/src/core/api/`
-
-### Configuration Changes
-- **LLM Models**: Update `conf.yaml` with new providers
-- **Search Engines**: Modify `.env` SEARCH_API variable
-- **RAG Integration**: Configure RAGFLOW_API_URL in `.env`
-- **MCP Servers**: Add MCP settings in configuration
-
-## Architecture Patterns
-
-### Agent Communication
-- **Message Passing**: Agents communicate via LangGraph state
-- **Tool Access**: Each agent has specific tool permissions
-- **State Management**: Persistent checkpoints for conversation history
-
-### Content Generation Pipeline
-1. **Planning**: Planner creates research plan
-2. **Research**: Researcher gathers information
-3. **Processing**: Coder analyzes data/code
-4. **Reporting**: Reporter synthesizes findings
-5. **Post-processing**: Optional podcast/PPT generation
-
-### External Integrations
-- **Search**: Tavily, Brave Search, DuckDuckGo
-- **Crawling**: Jina for web content extraction
-- **TTS**: Volcengine TTS API
-- **RAG**: RAGFlow and VikingDB support
-- **MCP**: Model Context Protocol integration

CONTRIBUTING

@@ -1,144 +0,0 @@
-# Contributing to DeerFlow
-
-Thank you for your interest in contributing to DeerFlow! We welcome contributions of all kinds from the community.
-
-## Ways to Contribute
-
-There are many ways you can contribute to DeerFlow:
-
-- **Code Contributions**: Add new features, fix bugs, or improve performance
-- **Documentation**: Improve README, add code comments, or create examples
-- **Bug Reports**: Submit detailed bug reports through issues
-- **Feature Requests**: Suggest new features or improvements
-- **Code Reviews**: Review pull requests from other contributors
-- **Community Support**: Help others in discussions and issues
-
-## Development Setup
-
-1. Fork the repository
-2. Clone your fork:
-
-   ```bash
-   git clone https://github.com/bytedance/deer-flow.git
-   cd deer-flow
-   ```
-
-3. Set up your development environment:
-
-   ```bash
-   # Install dependencies, uv will take care of the python interpreter and venv creation
-   uv sync
-
-   # For development, install additional dependencies
-   uv pip install -e ".[dev]"
-   uv pip install -e ".[test]"
-   ```
-
-4. Configure pre-commit hooks:
-
-   ```bash
-   chmod +x pre-commit
-   ln -s ../../pre-commit .git/hooks/pre-commit
-   ```
-
-## Development Process
-
-1. Create a new branch:
-
-   ```bash
-   git checkout -b feature/amazing-feature
-   ```
-
-2. Make your changes following our coding standards:
-   - Write clear, documented code
-   - Follow PEP 8 style guidelines
-   - Add tests for new features
-   - Update documentation as needed
-
-3. Run tests and checks:
-
-   ```bash
-   make test      # Run tests
-   make lint      # Run linting
-   make format    # Format code
-   make coverage  # Check test coverage
-   ```
-
-4. Commit your changes:
-
-   ```bash
-   git commit -m 'Add some amazing feature'
-   ```
-
-5. Push to your fork:
-
-   ```bash
-   git push origin feature/amazing-feature
-   ```
-
-6. Open a Pull Request
-
-## Pull Request Guidelines
-
-- Fill in the pull request template completely
-- Include tests for new features
-- Update documentation as needed
-- Ensure all tests pass and there are no linting errors
-- Keep pull requests focused on a single feature or fix
-- Reference any related issues
-
-## Code Style
-
-- Follow PEP 8 guidelines
-- Use type hints where possible
-- Write descriptive docstrings
-- Keep functions and methods focused and single-purpose
-- Comment complex logic
-- Python version requirement: >= 3.12
-
-## Testing
-
-Run the test suite:
-
-```bash
-# Run all tests
-make test
-
-# Run specific test file
-pytest tests/integration/test_workflow.py
-
-# Run with coverage
-make coverage
-```
-
-## Code Quality
-
-```bash
-# Run linting
-make lint
-
-# Format code
-make format
-```
-
-## Community Guidelines
-
-- Be respectful and inclusive
-- Follow our code of conduct
-- Help others learn and grow
-- Give constructive feedback
-- Stay focused on improving the project
-
-## Need Help?
-
-If you need help with anything:
-
-- Check existing issues and discussions
-- Join our community channels
-- Ask questions in discussions
-
-## License
-
-By contributing to DeerFlow, you agree that your contributions will be licensed under the MIT License.
-
-We appreciate your contributions to making DeerFlow better!

CONTRIBUTING.md

@@ -0,0 +1,323 @@
+# Contributing to DeerFlow
+
+Thank you for your interest in contributing to DeerFlow! This guide will help you set up your development environment and understand our development workflow.
+
+## Development Environment Setup
+
+We offer two development environments. **Docker is recommended** for the most consistent and hassle-free experience.
+
+### Option 1: Docker Development (Recommended)
+
+Docker provides a consistent, isolated environment with all dependencies pre-configured. No need to install Node.js, Python, or nginx on your local machine.
+
+#### Prerequisites
+
+- Docker Desktop or Docker Engine
+- pnpm (for caching optimization)
+
+#### Setup Steps
+
+1. **Configure the application**:
+   ```bash
+   # Copy example configuration
+   cp config.example.yaml config.yaml
+
+   # Set your API keys
+   export OPENAI_API_KEY="your-key-here"
+   # or edit config.yaml directly
+   ```
+
+2. **Initialize Docker environment** (first time only):
+   ```bash
+   make docker-init
+   ```
+   This will:
+   - Build Docker images
+   - Install frontend dependencies (pnpm)
+   - Install backend dependencies (uv)
+   - Share pnpm cache with host for faster builds
+
+3. **Start development services**:
+   ```bash
+   make docker-start
+   ```
+   `make docker-start` reads `config.yaml` and starts `provisioner` only for provisioner/Kubernetes sandbox mode.
+
+   All services will start with hot-reload enabled:
+   - Frontend changes are automatically reloaded
+   - Backend changes trigger automatic restart
+   - LangGraph server supports hot-reload
+
+4. **Access the application**:
+   - Web Interface: http://localhost:2026
+   - API Gateway: http://localhost:2026/api/*
+   - LangGraph: http://localhost:2026/api/langgraph/*
+
+#### Docker Commands
+
+```bash
+# Build the custom k3s image (with pre-cached sandbox image)
+make docker-init
+# Start Docker services (mode-aware, localhost:2026)
+make docker-start
+# Stop Docker development services
+make docker-stop
+# View Docker development logs
+make docker-logs
+# View Docker frontend logs
+make docker-logs-frontend
+# View Docker gateway logs
+make docker-logs-gateway
+```
+
+If Docker builds are slow in your network, you can override the default package registries before running `make docker-init` or `make docker-start`:
+
+```bash
+export UV_INDEX_URL=https://pypi.org/simple
+export NPM_REGISTRY=https://registry.npmjs.org
+```
+
+#### Linux: Docker daemon permission denied
+
+If `make docker-init`, `make docker-start`, or `make docker-stop` fails on Linux with an error like below, your current user likely does not have permission to access the Docker daemon socket:
+
+```text
+unable to get image 'deer-flow-dev-langgraph': permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock
+```
+
+Recommended fix: add your current user to the `docker` group so Docker commands work without `sudo`.
+
+1. Confirm the `docker` group exists:
+   ```bash
+   getent group docker
+   ```
+2. Add your current user to the `docker` group:
+   ```bash
+   sudo usermod -aG docker $USER
+   ```
+3. Apply the new group membership. The most reliable option is to log out completely and then log back in. If you want to refresh the current shell session instead, run:
+   ```bash
+   newgrp docker
+   ```
+4. Verify Docker access:
+   ```bash
+   docker ps
+   ```
+5. Retry the DeerFlow command:
+   ```bash
+   make docker-stop
+   make docker-start
+   ```
+
+If `docker ps` still reports a permission error after `usermod`, fully log out and log back in before retrying.
+
+#### Docker Architecture
+
+```
+Host Machine
+  ↓
+Docker Compose (deer-flow-dev)
+  ├→ nginx (port 2026) ← Reverse proxy
+  ├→ web (port 3000) ← Frontend with hot-reload
+  ├→ api (port 8001) ← Gateway API with hot-reload
+   ├→ langgraph (port 2024) ← LangGraph server with hot-reload
+   └→ provisioner (optional, port 8002) ← Started only in provisioner/K8s sandbox mode
+```
+
+**Benefits of Docker Development**:
+- ✅ Consistent environment across different machines
+- ✅ No need to install Node.js, Python, or nginx locally
+- ✅ Isolated dependencies and services
+- ✅ Easy cleanup and reset
+- ✅ Hot-reload for all services
+- ✅ Production-like environment
+
+### Option 2: Local Development
+
+If you prefer to run services directly on your machine:
+
+#### Prerequisites
+
+Check that you have all required tools installed:
+
+```bash
+make check
+```
+
+Required tools:
+- Node.js 22+
+- pnpm
+- uv (Python package manager)
+- nginx
+
+#### Setup Steps
+
+1. **Configure the application** (same as Docker setup above)
+
+2. **Install dependencies**:
+   ```bash
+   make install
+   ```
+
+3. **Run development server** (starts all services with nginx):
+   ```bash
+   make dev
+   ```
+
+4. **Access the application**:
+   - Web Interface: http://localhost:2026
+   - All API requests are automatically proxied through nginx
+
+#### Manual Service Control
+
+If you need to start services individually:
+
+1. **Start backend services**:
+   ```bash
+   # Terminal 1: Start LangGraph Server (port 2024)
+   cd backend
+   make dev
+
+   # Terminal 2: Start Gateway API (port 8001)
+   cd backend
+   make gateway
+
+   # Terminal 3: Start Frontend (port 3000)
+   cd frontend
+   pnpm dev
+   ```
+
+2. **Start nginx**:
+   ```bash
+   make nginx
+   # or directly: nginx -c $(pwd)/docker/nginx/nginx.local.conf -g 'daemon off;'
+   ```
+
+3. **Access the application**:
+   - Web Interface: http://localhost:2026
+
+#### Nginx Configuration
+
+The nginx configuration provides:
+- Unified entry point on port 2026
+- Routes `/api/langgraph/*` to LangGraph Server (2024)
+- Routes other `/api/*` endpoints to Gateway API (8001)
+- Routes non-API requests to Frontend (3000)
+- Centralized CORS handling
+- SSE/streaming support for real-time agent responses
+- Optimized timeouts for long-running operations
+
+## Project Structure
+
+```
+deer-flow/
+├── config.example.yaml      # Configuration template
+├── extensions_config.example.json  # MCP and Skills configuration template
+├── Makefile                 # Build and development commands
+├── scripts/
+│   └── docker.sh           # Docker management script
+├── docker/
+│   ├── docker-compose-dev.yaml  # Docker Compose configuration
+│   └── nginx/
+│       ├── nginx.conf      # Nginx config for Docker
+│       └── nginx.local.conf # Nginx config for local dev
+├── backend/                 # Backend application
+│   ├── src/
+│   │   ├── gateway/        # Gateway API (port 8001)
+│   │   ├── agents/         # LangGraph agents (port 2024)
+│   │   ├── mcp/            # Model Context Protocol integration
+│   │   ├── skills/         # Skills system
+│   │   └── sandbox/        # Sandbox execution
+│   ├── docs/               # Backend documentation
+│   └── Makefile            # Backend commands
+├── frontend/               # Frontend application
+│   └── Makefile            # Frontend commands
+└── skills/                 # Agent skills
+    ├── public/             # Public skills
+    └── custom/             # Custom skills
+```
+
+## Architecture
+
+```
+Browser
+  ↓
+Nginx (port 2026) ← Unified entry point
+  ├→ Frontend (port 3000) ← / (non-API requests)
+  ├→ Gateway API (port 8001) ← /api/models, /api/mcp, /api/skills, /api/threads/*/artifacts
+  └→ LangGraph Server (port 2024) ← /api/langgraph/* (agent interactions)
+```
+
+## Development Workflow
+
+1. **Create a feature branch**:
+   ```bash
+   git checkout -b feature/your-feature-name
+   ```
+
+2. **Make your changes** with hot-reload enabled
+
+3. **Format and lint your code** (CI will reject unformatted code):
+   ```bash
+   # Backend
+   cd backend
+   make format   # ruff check --fix + ruff format
+
+   # Frontend
+   cd frontend
+   pnpm format:write   # Prettier
+   ```
+
+4. **Test your changes** thoroughly
+
+5. **Commit your changes**:
+   ```bash
+   git add .
+   git commit -m "feat: description of your changes"
+   ```
+
+6. **Push and create a Pull Request**:
+   ```bash
+   git push origin feature/your-feature-name
+   ```
+
+## Testing
+
+```bash
+# Backend tests
+cd backend
+uv run pytest
+
+# Frontend checks
+cd frontend
+pnpm check
+```
+
+### PR Regression Checks
+
+Every pull request runs the backend regression workflow at [.github/workflows/backend-unit-tests.yml](.github/workflows/backend-unit-tests.yml), including:
+
+- `tests/test_provisioner_kubeconfig.py`
+- `tests/test_docker_sandbox_mode_detection.py`
+
+## Code Style
+
+- **Backend (Python)**: We use `ruff` for linting and formatting. Run `make format` before committing.
+- **Frontend (TypeScript)**: We use ESLint and Prettier. Run `pnpm format:write` before committing.
+- CI enforces formatting — PRs with unformatted code will fail the lint check.
+
+## Documentation
+
+- [Configuration Guide](backend/docs/CONFIGURATION.md) - Setup and configuration
+- [Architecture Overview](backend/CLAUDE.md) - Technical architecture
+- [MCP Setup Guide](backend/docs/MCP_SERVER.md) - Model Context Protocol configuration
+
+## Need Help?
+
+- Check existing [Issues](https://github.com/bytedance/deer-flow/issues)
+- Read the [Documentation](backend/docs/)
+- Ask questions in [Discussions](https://github.com/bytedance/deer-flow/discussions)
+
+## License
+
+By contributing to DeerFlow, you agree that your contributions will be licensed under the [MIT License](./LICENSE).

Dockerfile

@@ -1,32 +0,0 @@
-FROM ghcr.io/astral-sh/uv:python3.12-bookworm
-
-# Install uv.
-COPY --from=ghcr.io/astral-sh/uv:latest /uv /bin/uv
-
-# Install system dependencies including libpq
-RUN apt-get update && apt-get install -y \
-    libpq-dev \
-    && rm -rf /var/lib/apt/lists/*
-    
-WORKDIR /app
-
-# Pre-cache the application dependencies.
-RUN --mount=type=cache,target=/root/.cache/uv \
-    --mount=type=bind,source=uv.lock,target=uv.lock \
-    --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
-    uv sync --locked --no-install-project
-
-# Copy the application into the container.
-COPY . /app
-
-# Install the application dependencies.
-RUN --mount=type=cache,target=/root/.cache/uv \
-    uv sync --locked
-
-EXPOSE 8000
-
-# Run the application.
-RUN useradd -m appuser
-USER appuser
-
-CMD ["uv", "run", "python", "server.py", "--host", "0.0.0.0", "--port", "8000"]

Install.md

@@ -0,0 +1,87 @@
+# DeerFlow Install
+
+This file is for coding agents. If the DeerFlow repository is not already cloned and open, clone `https://github.com/bytedance/deer-flow.git` first, then continue from the repository root.
+
+## Goal
+
+Bootstrap a DeerFlow local development workspace on the user's machine with the least risky path available.
+
+Default preference:
+
+1. Docker development environment
+2. Local development environment
+
+Do not assume API keys or model credentials exist. Set up everything that can be prepared safely, then stop with a concise summary of what the user still needs to provide.
+
+## Operating Rules
+
+- Be idempotent. Re-running this document should not damage an existing setup.
+- Prefer existing repo commands over ad hoc shell commands.
+- Do not use `sudo` or install system packages without explicit user approval.
+- Do not overwrite existing user config values unless the user asks.
+- If a step fails, stop, explain the blocker, and provide the smallest next action.
+- If multiple setup paths are possible, prefer Docker when Docker is already available.
+
+## Success Criteria
+
+Consider the setup successful when all of the following are true:
+
+- The DeerFlow repository is cloned and the current working directory is the repo root.
+- `config.yaml` exists.
+- For Docker setup, `make docker-init` completed successfully and Docker prerequisites are prepared, but services are not assumed to be running yet.
+- For local setup, `make check` passed or reported no missing prerequisites, and `make install` completed successfully.
+- The user receives the exact next command to launch DeerFlow.
+- The user also receives any missing model configuration or referenced environment variable names from `config.yaml`, without inspecting secret-bearing files for actual values.
+
+## Steps
+
+- If the current directory is not the DeerFlow repository root, clone `https://github.com/bytedance/deer-flow.git` if needed, then change into the repository root.
+- Confirm the current directory is the DeerFlow repository root by checking that `Makefile`, `backend/`, `frontend/`, and `config.example.yaml` exist.
+- Detect whether `config.yaml` already exists.
+- If `config.yaml` does not exist, run `make config`.
+- Detect whether Docker is available and the daemon is reachable with `docker info`.
+- If Docker is available:
+  - Run `make docker-init`.
+  - Treat this as Docker prerequisite preparation only. Do not claim that app services, compose validation, or image builds have already succeeded.
+  - Do not start long-running services unless the user explicitly asks or this setup request clearly includes launch verification.
+  - Tell the user the recommended next command is `make docker-start`.
+- If Docker is not available:
+  - Run `make check`.
+  - If `make check` reports missing system dependencies such as `node`, `pnpm`, `uv`, or `nginx`, stop and report the missing tools instead of attempting privileged installs.
+  - If prerequisites are satisfied, run `make install`.
+  - Tell the user the recommended next command is `make dev`.
+- Inspect `config.yaml` only for missing model entries or referenced environment variable placeholders. Do not read `.env`, `frontend/.env`, or other secret-bearing files.
+- If no model is configured, tell the user they must add at least one entry under `models` in `config.yaml`.
+- If `config.yaml` references variables such as `$OPENAI_API_KEY`, tell the user which variable names still need real values, but do not verify them by opening secret-bearing files.
+- If the repository already appears configured, avoid repeating expensive work unless it is necessary to verify the environment.
+
+## Verification
+
+Use the lightest verification that matches the chosen setup path.
+
+For Docker setup:
+
+- Confirm `make docker-init` completed successfully.
+- Confirm `config.yaml` exists.
+- State explicitly that Docker services were not started and `make docker-start` is still the first real launch step.
+- Do not leave background services running unless the user asked for that.
+
+For local setup:
+
+- Confirm `make install` completed successfully.
+- Confirm `config.yaml` exists.
+- Do not leave background services running unless the user asked for that.
+
+## Final Response Format
+
+Return a short status report with:
+
+1. Setup path used: Docker or local
+2. Setup level reached: Docker prerequisites prepared or local dependencies installed
+3. Files created or detected: for example `config.yaml`
+4. Remaining user action: model config, env var values, auth files, or nothing
+5. Exact next command to start DeerFlow
+
+## EXECUTE NOW
+
+Complete the steps above. When finished, stop after the setup boundary and report status instead of continuing into unrelated project work.

LICENSE

@@ -1,6 +1,7 @@
 MIT License
 
 Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
+Copyright (c) 2025-2026 DeerFlow Authors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -18,4 +19,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+SOFTWARE.

LICENSE_HEADER

@@ -1,2 +0,0 @@
-# Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
-# SPDX-License-Identifier: MIT

LICENSE_HEADER_TS

@@ -1,2 +0,0 @@
-// Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
-// SPDX-License-Identifier: MIT

Makefile

@@ -1,44 +1,234 @@
-.PHONY: help lint format install-dev serve test coverage langgraph-dev lint-frontend add-license-all check-license-all
+# DeerFlow - Unified Development Environment
 
-help: ## Show this help message
-	@echo "Deer Flow - Available Make Targets:"
+.PHONY: help config config-upgrade check install dev dev-pro dev-daemon dev-daemon-pro start start-pro start-daemon start-daemon-pro stop up up-pro down clean docker-init docker-start docker-start-pro docker-stop docker-logs docker-logs-frontend docker-logs-gateway
+
+BASH ?= bash
+
+# Detect OS for Windows compatibility
+ifeq ($(OS),Windows_NT)
+    SHELL := cmd.exe
+    PYTHON ?= python
+else
+    PYTHON ?= python3
+endif
+
+help:
+	@echo "DeerFlow Development Commands:"
+	@echo "  make config          - Generate local config files (aborts if config already exists)"
+	@echo "  make config-upgrade  - Merge new fields from config.example.yaml into config.yaml"
+	@echo "  make check           - Check if all required tools are installed"
+	@echo "  make install         - Install all dependencies (frontend + backend)"
+	@echo "  make setup-sandbox   - Pre-pull sandbox container image (recommended)"
+	@echo "  make dev             - Start all services in development mode (with hot-reloading)"
+	@echo "  make dev-pro         - Start in dev + Gateway mode (experimental, no LangGraph server)"
+	@echo "  make dev-daemon      - Start dev services in background (daemon mode)"
+	@echo "  make dev-daemon-pro  - Start dev daemon + Gateway mode (experimental)"
+	@echo "  make start           - Start all services in production mode (optimized, no hot-reloading)"
+	@echo "  make start-pro       - Start in prod + Gateway mode (experimental)"
+	@echo "  make start-daemon    - Start prod services in background (daemon mode)"
+	@echo "  make start-daemon-pro - Start prod daemon + Gateway mode (experimental)"
+	@echo "  make stop            - Stop all running services"
+	@echo "  make clean           - Clean up processes and temporary files"
 	@echo ""
-	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "  \033[36m%-18s\033[0m %s\n", $$1, $$2}'
+	@echo "Docker Production Commands:"
+	@echo "  make up              - Build and start production Docker services (localhost:2026)"
+	@echo "  make up-pro          - Build and start production Docker in Gateway mode (experimental)"
+	@echo "  make down            - Stop and remove production Docker containers"
 	@echo ""
-	@echo "Usage: make <target>"
+	@echo "Docker Development Commands:"
+	@echo "  make docker-init     - Pull the sandbox image"
+	@echo "  make docker-start    - Start Docker services (mode-aware from config.yaml, localhost:2026)"
+	@echo "  make docker-start-pro - Start Docker in Gateway mode (experimental, no LangGraph container)"
+	@echo "  make docker-stop     - Stop Docker development services"
+	@echo "  make docker-logs     - View Docker development logs"
+	@echo "  make docker-logs-frontend - View Docker frontend logs"
+	@echo "  make docker-logs-gateway - View Docker gateway logs"
 
-install-dev: ## Install development dependencies which could be optional for normal usage
-	uv pip install -e ".[dev]" && uv pip install -e ".[test]"
+config:
+	@$(PYTHON) ./scripts/configure.py
 
-format: ## Format code using ruff
-	uv run ruff format --config pyproject.toml .
+config-upgrade:
+	@./scripts/config-upgrade.sh
 
-lint: ## Lint and fix code using ruff
-	uv run ruff check --fix --select I --config pyproject.toml .
+# Check required tools
+check:
+	@$(PYTHON) ./scripts/check.py
 
-lint-frontend: ## Lint frontend code, run tests, and check build
-	cd web && pnpm install --frozen-lockfile
-	cd web && pnpm lint
-	cd web && pnpm typecheck
-	cd web && pnpm test:run
-	cd web && pnpm build
+# Install all dependencies
+install:
+	@echo "Installing backend dependencies..."
+	@cd backend && uv sync
+	@echo "Installing frontend dependencies..."
+	@cd frontend && pnpm install
+	@echo "✓ All dependencies installed"
+	@echo ""
+	@echo "=========================================="
+	@echo "  Optional: Pre-pull Sandbox Image"
+	@echo "=========================================="
+	@echo ""
+	@echo "If you plan to use Docker/Container-based sandbox, you can pre-pull the image:"
+	@echo "  make setup-sandbox"
+	@echo ""
 
-serve: ## Start development server with reload
-	uv run server.py --reload
+# Pre-pull sandbox Docker image (optional but recommended)
+setup-sandbox:
+	@echo "=========================================="
+	@echo "  Pre-pulling Sandbox Container Image"
+	@echo "=========================================="
+	@echo ""
+	@IMAGE=$$(grep -A 20 "# sandbox:" config.yaml 2>/dev/null | grep "image:" | awk '{print $$2}' | head -1); \
+	if [ -z "$$IMAGE" ]; then \
+		IMAGE="enterprise-public-cn-beijing.cr.volces.com/vefaas-public/all-in-one-sandbox:latest"; \
+		echo "Using default image: $$IMAGE"; \
+	else \
+		echo "Using configured image: $$IMAGE"; \
+	fi; \
+	echo ""; \
+	if command -v container >/dev/null 2>&1 && [ "$$(uname)" = "Darwin" ]; then \
+		echo "Detected Apple Container on macOS, pulling image..."; \
+		container pull "$$IMAGE" || echo "⚠ Apple Container pull failed, will try Docker"; \
+	fi; \
+	if command -v docker >/dev/null 2>&1; then \
+		echo "Pulling image using Docker..."; \
+		if docker pull "$$IMAGE"; then \
+			echo ""; \
+			echo "✓ Sandbox image pulled successfully"; \
+		else \
+			echo ""; \
+			echo "⚠ Failed to pull sandbox image (this is OK for local sandbox mode)"; \
+		fi; \
+	else \
+		echo "✗ Neither Docker nor Apple Container is available"; \
+		echo "  Please install Docker: https://docs.docker.com/get-docker/"; \
+		exit 1; \
+	fi
 
-test: ## Run tests with pytest, need to run after 'make install-dev' for first time
-	uv run pytest tests/
+# Start all services in development mode (with hot-reloading)
+dev:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --dev
+else
+	@./scripts/serve.sh --dev
+endif
 
-langgraph-dev: ## Start langgraph development server
-	uvx --refresh --from "langgraph-cli[inmem]" --with-editable . --python 3.12 langgraph dev --allow-blocking
+# Start all services in dev + Gateway mode (experimental: agent runtime embedded in Gateway)
+dev-pro:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --dev --gateway
+else
+	@./scripts/serve.sh --dev --gateway
+endif
 
-coverage: ## Run tests with coverage report
-	uv run pytest --cov=src tests/ --cov-report=term-missing --cov-report=xml
+# Start all services in production mode (with optimizations)
+start:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --prod
+else
+	@./scripts/serve.sh --prod
+endif
 
-add-license-all: ## Add license headers to all Python and TypeScript files
-	@echo "Adding license headers to all source files..."
-	@uv run python scripts/license_header.py src/ tests/ server.py main.py web/src/ web/tests/ --verbose
+# Start all services in prod + Gateway mode (experimental)
+start-pro:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --prod --gateway
+else
+	@./scripts/serve.sh --prod --gateway
+endif
 
-check-license-all: ## Check if all Python and TypeScript files have license headers
-	@echo "Checking license headers in all source files..."
-	@uv run python scripts/license_header.py src/ tests/ server.py main.py web/src/ web/tests/ --check
+# Start all services in daemon mode (background)
+dev-daemon:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --dev --daemon
+else
+	@./scripts/serve.sh --dev --daemon
+endif
+
+# Start daemon + Gateway mode (experimental)
+dev-daemon-pro:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --dev --gateway --daemon
+else
+	@./scripts/serve.sh --dev --gateway --daemon
+endif
+
+# Start prod services in daemon mode (background)
+start-daemon:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --prod --daemon
+else
+	@./scripts/serve.sh --prod --daemon
+endif
+
+# Start prod daemon + Gateway mode (experimental)
+start-daemon-pro:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --prod --gateway --daemon
+else
+	@./scripts/serve.sh --prod --gateway --daemon
+endif
+
+# Stop all services
+stop:
+	@./scripts/serve.sh --stop
+
+# Clean up
+clean: stop
+	@echo "Cleaning up..."
+	@-rm -rf backend/.deer-flow 2>/dev/null || true
+	@-rm -rf backend/.langgraph_api 2>/dev/null || true
+	@-rm -rf logs/*.log 2>/dev/null || true
+	@echo "✓ Cleanup complete"
+
+# ==========================================
+# Docker Development Commands
+# ==========================================
+
+# Initialize Docker containers and install dependencies
+docker-init:
+	@./scripts/docker.sh init
+
+# Start Docker development environment
+docker-start:
+	@./scripts/docker.sh start
+
+# Start Docker in Gateway mode (experimental)
+docker-start-pro:
+	@./scripts/docker.sh start --gateway
+
+# Stop Docker development environment
+docker-stop:
+	@./scripts/docker.sh stop
+
+# View Docker development logs
+docker-logs:
+	@./scripts/docker.sh logs
+
+# View Docker development logs
+docker-logs-frontend:
+	@./scripts/docker.sh logs --frontend
+docker-logs-gateway:
+	@./scripts/docker.sh logs --gateway
+
+# ==========================================
+# Production Docker Commands
+# ==========================================
+
+# Build and start production services
+up:
+	@./scripts/deploy.sh
+
+# Build and start production services in Gateway mode
+up-pro:
+	@./scripts/deploy.sh --gateway
+
+# Stop and remove production containers
+down:
+	@./scripts/deploy.sh down

README_de.md

@@ -1,610 +0,0 @@
-# 🦌 DeerFlow
-
-[![Python 3.12+](https://img.shields.io/badge/python-3.12+-blue.svg)](https://www.python.org/downloads/)
-[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
-[![DeepWiki](https://img.shields.io/badge/DeepWiki-bytedance%2Fdeer--flow-blue.svg?logo=data:image/png;base64,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)](https://deepwiki.com/bytedance/deer-flow)
-<!-- DeepWiki badge generated by https://deepwiki.ryoppippi.com/ -->
-
-[English](./README.md) | [简体中文](./README_zh.md) | [日本語](./README_ja.md) | [Deutsch](./README_de.md) | [Español](./README_es.md) | [Русский](./README_ru.md) | [Portuguese](./README_pt.md)
-
-> Aus Open Source entstanden, an Open Source zurückgeben.
-
-**DeerFlow** (**D**eep **E**xploration and **E**fficient **R**esearch **Flow**) ist ein Community-getriebenes Framework für tiefgehende Recherche, das auf der großartigen Arbeit der Open-Source-Community aufbaut. Unser Ziel ist es, Sprachmodelle mit spezialisierten Werkzeugen für Aufgaben wie Websuche, Crawling und Python-Code-Ausführung zu kombinieren und gleichzeitig der Community, die dies möglich gemacht hat, etwas zurückzugeben.
-
-Derzeit ist DeerFlow offiziell in das [FaaS-Anwendungszentrum von Volcengine](https://console.volcengine.com/vefaas/region:vefaas+cn-beijing/market) eingezogen. Benutzer können es über den [Erfahrungslink](https://console.volcengine.com/vefaas/region:vefaas+cn-beijing/market/deerflow/?channel=github&source=deerflow) online erleben, um seine leistungsstarken Funktionen und bequemen Operationen intuitiv zu spüren. Gleichzeitig unterstützt DeerFlow zur Erfüllung der Bereitstellungsanforderungen verschiedener Benutzer die Ein-Klick-Bereitstellung basierend auf Volcengine. Klicken Sie auf den [Bereitstellungslink](https://console.volcengine.com/vefaas/region:vefaas+cn-beijing/application/create?templateId=683adf9e372daa0008aaed5c&channel=github&source=deerflow), um den Bereitstellungsprozess schnell abzuschließen und eine effiziente Forschungsreise zu beginnen.
-
-DeerFlow hat neu die intelligente Such- und Crawling-Toolset von BytePlus integriert - [InfoQuest (unterstützt kostenlose Online-Erfahrung)](https://docs.byteplus.com/en/docs/InfoQuest/What_is_Info_Quest)
-
-<a href="https://docs.byteplus.com/en/docs/InfoQuest/What_is_Info_Quest" target="_blank">
-  <img 
-    src="https://sf16-sg.tiktokcdn.com/obj/eden-sg/hubseh7bsbps/20251208-160108.png"   alt="infoquest_bannar" 
-  />
-</a>
-
-Besuchen Sie [unsere offizielle Website](https://deerflow.tech/) für weitere Details.
-
-## Demo
-
-### Video
-
-<https://github.com/user-attachments/assets/f3786598-1f2a-4d07-919e-8b99dfa1de3e>
-
-In dieser Demo zeigen wir, wie man DeerFlow nutzt, um:
-
-- Nahtlos mit MCP-Diensten zu integrieren
-- Den Prozess der tiefgehenden Recherche durchzuführen und einen umfassenden Bericht mit Bildern zu erstellen
-- Podcast-Audio basierend auf dem generierten Bericht zu erstellen
-
-### Wiedergaben
-
-- [Wie hoch ist der Eiffelturm im Vergleich zum höchsten Gebäude?](https://deerflow.tech/chat?replay=eiffel-tower-vs-tallest-building)
-- [Was sind die angesagtesten Repositories auf GitHub?](https://deerflow.tech/chat?replay=github-top-trending-repo)
-- [Einen Artikel über traditionelle Gerichte aus Nanjing schreiben](https://deerflow.tech/chat?replay=nanjing-traditional-dishes)
-- [Wie dekoriert man eine Mietwohnung?](https://deerflow.tech/chat?replay=rental-apartment-decoration)
-- [Besuchen Sie unsere offizielle Website, um weitere Wiedergaben zu entdecken.](https://deerflow.tech/#case-studies)
-
----
-
-## 📑 Inhaltsverzeichnis
-
-- [🚀 Schnellstart](#schnellstart)
-- [🌟 Funktionen](#funktionen)
-- [🏗️ Architektur](#architektur)
-- [🛠️ Entwicklung](#entwicklung)
-- [🐳 Docker](#docker)
-- [🗣️ Text-zu-Sprache-Integration](#text-zu-sprache-integration)
-- [📚 Beispiele](#beispiele)
-- [❓ FAQ](#faq)
-- [📜 Lizenz](#lizenz)
-- [💖 Danksagungen](#danksagungen)
-- [⭐ Star-Verlauf](#star-verlauf)
-
-## Schnellstart
-
-DeerFlow ist in Python entwickelt und kommt mit einer in Node.js geschriebenen Web-UI. Um einen reibungslosen Einrichtungsprozess zu gewährleisten, empfehlen wir die Verwendung der folgenden Tools:
-
-### Empfohlene Tools
-
-- **[`uv`](https://docs.astral.sh/uv/getting-started/installation/):**
-  Vereinfacht die Verwaltung von Python-Umgebungen und Abhängigkeiten. `uv` erstellt automatisch eine virtuelle Umgebung im Stammverzeichnis und installiert alle erforderlichen Pakete für Sie—keine manuelle Installation von Python-Umgebungen notwendig.
-
-- **[`nvm`](https://github.com/nvm-sh/nvm):**
-  Verwalten Sie mühelos mehrere Versionen der Node.js-Laufzeit.
-
-- **[`pnpm`](https://pnpm.io/installation):**
-  Installieren und verwalten Sie Abhängigkeiten des Node.js-Projekts.
-
-### Umgebungsanforderungen
-
-Stellen Sie sicher, dass Ihr System die folgenden Mindestanforderungen erfüllt:
-
-- **[Python](https://www.python.org/downloads/):** Version `3.12+`
-- **[Node.js](https://nodejs.org/en/download/):** Version `22+`
-
-### Installation
-
-```bash
-# Repository klonen
-git clone https://github.com/bytedance/deer-flow.git
-cd deer-flow
-
-# Abhängigkeiten installieren, uv kümmert sich um den Python-Interpreter und die Erstellung der venv sowie die Installation der erforderlichen Pakete
-uv sync
-
-# Konfigurieren Sie .env mit Ihren API-Schlüsseln
-# Tavily: https://app.tavily.com/home
-# Brave_SEARCH: https://brave.com/search/api/
-# volcengine TTS: Fügen Sie Ihre TTS-Anmeldedaten hinzu, falls vorhanden
-cp .env.example .env
-
-# Siehe die Abschnitte 'Unterstützte Suchmaschinen' und 'Text-zu-Sprache-Integration' unten für alle verfügbaren Optionen
-
-# Konfigurieren Sie conf.yaml für Ihr LLM-Modell und API-Schlüssel
-# Weitere Details finden Sie unter 'docs/configuration_guide.md'
-cp conf.yaml.example conf.yaml
-
-# Installieren Sie marp für PPT-Generierung
-# https://github.com/marp-team/marp-cli?tab=readme-ov-file#use-package-manager
-brew install marp-cli
-```
-
-Optional können Sie Web-UI-Abhängigkeiten über [pnpm](https://pnpm.io/installation) installieren:
-
-```bash
-cd deer-flow/web
-pnpm install
-```
-
-### Konfigurationen
-
-Weitere Informationen finden Sie im [Konfigurationsleitfaden](docs/configuration_guide.md).
-
-> [!HINWEIS]
-> Lesen Sie den Leitfaden sorgfältig, bevor Sie das Projekt starten, und aktualisieren Sie die Konfigurationen entsprechend Ihren spezifischen Einstellungen und Anforderungen.
-
-### Konsolen-UI
-
-Der schnellste Weg, um das Projekt auszuführen, ist die Verwendung der Konsolen-UI.
-
-```bash
-# Führen Sie das Projekt in einer bash-ähnlichen Shell aus
-uv run main.py
-```
-
-### Web-UI
-
-Dieses Projekt enthält auch eine Web-UI, die ein dynamischeres und ansprechenderes interaktives Erlebnis bietet.
-
-> [!HINWEIS]
-> Sie müssen zuerst die Abhängigkeiten der Web-UI installieren.
-
-```bash
-# Führen Sie sowohl den Backend- als auch den Frontend-Server im Entwicklungsmodus aus
-# Unter macOS/Linux
-./bootstrap.sh -d
-
-# Unter Windows
-bootstrap.bat -d
-```
-> [!HINWEIS]
-> Standardmäßig bindet sich der Backend-Server aus Sicherheitsgründen an 127.0.0.1 (localhost). Wenn Sie externe Verbindungen zulassen müssen (z. B. bei der Bereitstellung auf einem Linux-Server), können Sie den Server-Host im Bootstrap-Skript auf 0.0.0.0 ändern (uv run server.py --host 0.0.0.0).
-> Bitte stellen Sie sicher, dass Ihre Umgebung ordnungsgemäß gesichert ist, bevor Sie den Service externen Netzwerken aussetzen.
-
-Öffnen Sie Ihren Browser und besuchen Sie [`http://localhost:3000`](http://localhost:3000), um die Web-UI zu erkunden.
-
-Weitere Details finden Sie im Verzeichnis [`web`](./web/).
-
-## Unterstützte Suchmaschinen
-
-### Websuche
-
-DeerFlow unterstützt mehrere Suchmaschinen, die in Ihrer `.env`-Datei über die Variable `SEARCH_API` konfiguriert werden können:
-
-- **Tavily** (Standard): Eine spezialisierte Such-API für KI-Anwendungen
-  - Erfordert `TAVILY_API_KEY` in Ihrer `.env`-Datei
-  - Registrieren Sie sich unter: https://app.tavily.com/home
-
-- **InfoQuest** (empfohlen): Ein KI-optimiertes intelligentes Such- und Crawling-Toolset, entwickelt von BytePlus
-  - Erfordert `INFOQUEST_API_KEY` in Ihrer `.env`-Datei
-  - Unterstützung für Zeitbereichsfilterung und Seitenfilterung
-  - Bietet qualitativ hochwertige Suchergebnisse und Inhaltsextraktion
-  - Registrieren Sie sich unter: https://console.byteplus.com/infoquest/infoquests
-  - Besuchen Sie https://docs.byteplus.com/de/docs/InfoQuest/What_is_Info_Quest für weitere Informationen
-
-- **DuckDuckGo**: Datenschutzorientierte Suchmaschine
-  - Kein API-Schlüssel erforderlich
-
-- **Brave Search**: Datenschutzorientierte Suchmaschine mit erweiterten Funktionen
-  - Erfordert `BRAVE_SEARCH_API_KEY` in Ihrer `.env`-Datei
-  - Registrieren Sie sich unter: https://brave.com/search/api/
-
-- **Arxiv**: Wissenschaftliche Papiersuche für akademische Forschung
-  - Kein API-Schlüssel erforderlich
-  - Spezialisiert auf wissenschaftliche und akademische Papiere
-
-- **Searx/SearxNG**: Selbstgehostete Metasuchmaschine
-    - Erfordert `SEARX_HOST` in Ihrer `.env`-Datei
-    - Unterstützt die Anbindung an Searx oder SearxNG
-
-Um Ihre bevorzugte Suchmaschine zu konfigurieren, setzen Sie die Variable `SEARCH_API` in Ihrer `.env`-Datei:
-
-```bash
-# Wählen Sie eine: tavily, infoquest, duckduckgo, brave_search, arxiv
-SEARCH_API=tavily
-```
-
-### Crawling-Tools
-
-- **Jina** (Standard): Kostenloses, zugängliches Webinhalts-Crawling-Tool
-  - Kein API-Schlüssel erforderlich für grundlegende Funktionen
-  - Mit API-Schlüssel erhalten Sie höhere Zugriffsraten
-  - Weitere Informationen unter <https://jina.ai/reader>
-
-- **InfoQuest** (empfohlen): KI-optimiertes intelligentes Such- und Crawling-Toolset, entwickelt von BytePlus
-  - Erfordert `INFOQUEST_API_KEY` in Ihrer `.env`-Datei
-  - Bietet konfigurierbare Crawling-Parameter
-  - Unterstützt benutzerdefinierte Timeout-Einstellungen
-  - Bietet stärkere Inhaltsextraktionsfähigkeiten
-  - Weitere Informationen unter <https://docs.byteplus.com/de/docs/InfoQuest/What_is_Info_Quest>
-
-Um Ihr bevorzugtes Crawling-Tool zu konfigurieren, setzen Sie Folgendes in Ihrer `conf.yaml`-Datei:
-
-```yaml
-CRAWLER_ENGINE:
-  # Engine-Typ: "jina" (Standard) oder "infoquest"
-  engine: infoquest
-```
-
-### Private Wissensbasis
-
-DeerFlow unterstützt private Wissensbasen wie RAGFlow und VikingDB, sodass Sie Ihre privaten Dokumente zur Beantwortung von Fragen verwenden können.
-
-- **[RAGFlow](https://ragflow.io/docs/dev/)**：Open-Source-RAG-Engine
-   ```
-   # Beispiele in .env.example
-   RAG_PROVIDER=ragflow
-   RAGFLOW_API_URL="http://localhost:9388"
-   RAGFLOW_API_KEY="ragflow-xxx"
-   RAGFLOW_RETRIEVAL_SIZE=10
-   RAGFLOW_CROSS_LANGUAGES=English,Chinese,Spanish,French,German,Japanese,Korean
-   ```
-
-## Funktionen
-
-### Kernfähigkeiten
-
-- 🤖 **LLM-Integration**
-  - Unterstützt die Integration der meisten Modelle über [litellm](https://docs.litellm.ai/docs/providers).
-  - Unterstützung für Open-Source-Modelle wie Qwen
-  - OpenAI-kompatible API-Schnittstelle
-  - Mehrstufiges LLM-System für unterschiedliche Aufgabenkomplexitäten
-
-### Tools und MCP-Integrationen
-
-- 🔍 **Suche und Abruf**
-  - Websuche über Tavily, InfoQuest, Brave Search und mehr
-  - Crawling mit Jina und InfoQuest
-  - Fortgeschrittene Inhaltsextraktion
-  - Unterstützung für private Wissensbasis
-
-- 📃 **RAG-Integration**
-
-  - Unterstützt die Erwähnung von Dateien aus [RAGFlow](https://github.com/infiniflow/ragflow) innerhalb der Eingabebox. [RAGFlow-Server starten](https://ragflow.io/docs/dev/).
-
-- 🔗 **MCP Nahtlose Integration**
-  - Erweiterte Fähigkeiten für privaten Domänenzugriff, Wissensgraphen, Webbrowsing und mehr
-  - Erleichtert die Integration verschiedener Forschungswerkzeuge und -methoden
-
-### Menschliche Zusammenarbeit
-
-- 🧠 **Mensch-in-der-Schleife**
-  - Unterstützt interaktive Modifikation von Forschungsplänen mit natürlicher Sprache
-  - Unterstützt automatische Akzeptanz von Forschungsplänen
-
-- 📝 **Bericht-Nachbearbeitung**
-  - Unterstützt Notion-ähnliche Blockbearbeitung
-  - Ermöglicht KI-Verfeinerungen, einschließlich KI-unterstützter Polierung, Satzkürzung und -erweiterung
-  - Angetrieben von [tiptap](https://tiptap.dev/)
-
-### Inhaltserstellung
-
-- 🎙️ **Podcast- und Präsentationserstellung**
-  - KI-gestützte Podcast-Skripterstellung und Audiosynthese
-  - Automatisierte Erstellung einfacher PowerPoint-Präsentationen
-  - Anpassbare Vorlagen für maßgeschneiderte Inhalte
-
-## Architektur
-
-DeerFlow implementiert eine modulare Multi-Agenten-Systemarchitektur, die für automatisierte Forschung und Codeanalyse konzipiert ist. Das System basiert auf LangGraph und ermöglicht einen flexiblen zustandsbasierten Workflow, bei dem Komponenten über ein klar definiertes Nachrichtenübermittlungssystem kommunizieren.
-
-![Architekturdiagramm](./assets/architecture.png)
-
-> Sehen Sie es live auf [deerflow.tech](https://deerflow.tech/#multi-agent-architecture)
-
-Das System verwendet einen optimierten Workflow mit den folgenden Komponenten:
-
-1. **Koordinator**: Der Einstiegspunkt, der den Workflow-Lebenszyklus verwaltet
-   - Initiiert den Forschungsprozess basierend auf Benutzereingaben
-   - Delegiert Aufgaben bei Bedarf an den Planer
-   - Fungiert als primäre Schnittstelle zwischen dem Benutzer und dem System
-
-2. **Planer**: Strategische Komponente für Aufgabenzerlegung und -planung
-   - Analysiert Forschungsziele und erstellt strukturierte Ausführungspläne
-   - Bestimmt, ob ausreichend Kontext verfügbar ist oder ob weitere Forschung benötigt wird
-   - Verwaltet den Forschungsablauf und entscheidet, wann der endgültige Bericht erstellt wird
-
-3. **Forschungsteam**: Eine Sammlung spezialisierter Agenten, die den Plan ausführen:
-   - **Forscher**: Führt Websuchen und Informationssammlung mit Tools wie Websuchmaschinen, Crawling und sogar MCP-Diensten durch.
-   - **Codierer**: Behandelt Codeanalyse, -ausführung und technische Aufgaben mit dem Python REPL Tool.
-   Jeder Agent hat Zugriff auf spezifische Tools, die für seine Rolle optimiert sind, und operiert innerhalb des LangGraph-Frameworks
-
-4. **Reporter**: Endphasenprozessor für Forschungsergebnisse
-   - Aggregiert Erkenntnisse vom Forschungsteam
-   - Verarbeitet und strukturiert die gesammelten Informationen
-   - Erstellt umfassende Forschungsberichte
-
-## Text-zu-Sprache-Integration
-
-DeerFlow enthält jetzt eine Text-zu-Sprache (TTS)-Funktion, mit der Sie Forschungsberichte in Sprache umwandeln können. Diese Funktion verwendet die volcengine TTS API, um hochwertige Audios aus Text zu generieren. Funktionen wie Geschwindigkeit, Lautstärke und Tonhöhe können ebenfalls angepasst werden.
-
-### Verwendung der TTS API
-
-Sie können auf die TTS-Funktionalität über den Endpunkt `/api/tts` zugreifen:
-
-```bash
-# Beispiel API-Aufruf mit curl
-curl --location 'http://localhost:8000/api/tts' \
---header 'Content-Type: application/json' \
---data '{
-    "text": "Dies ist ein Test der Text-zu-Sprache-Funktionalität.",
-    "speed_ratio": 1.0,
-    "volume_ratio": 1.0,
-    "pitch_ratio": 1.0
-}' \
---output speech.mp3
-```
-
-## Entwicklung
-
-### Testen
-
-Führen Sie die Testsuite aus:
-
-```bash
-# Alle Tests ausführen
-make test
-
-# Spezifische Testdatei ausführen
-pytest tests/integration/test_workflow.py
-
-# Mit Abdeckung ausführen
-make coverage
-```
-
-### Codequalität
-
-```bash
-# Lint ausführen
-make lint
-
-# Code formatieren
-make format
-```
-
-### Debugging mit LangGraph Studio
-
-DeerFlow verwendet LangGraph für seine Workflow-Architektur. Sie können LangGraph Studio verwenden, um den Workflow in Echtzeit zu debuggen und zu visualisieren.
-
-#### LangGraph Studio lokal ausführen
-
-DeerFlow enthält eine `langgraph.json`-Konfigurationsdatei, die die Graphstruktur und Abhängigkeiten für das LangGraph Studio definiert. Diese Datei verweist auf die im Projekt definierten Workflow-Graphen und lädt automatisch Umgebungsvariablen aus der `.env`-Datei.
-
-##### Mac
-
-```bash
-# Installieren Sie den uv-Paketmanager, wenn Sie ihn noch nicht haben
-curl -LsSf https://astral.sh/uv/install.sh | sh
-
-# Installieren Sie Abhängigkeiten und starten Sie den LangGraph-Server
-uvx --refresh --from "langgraph-cli[inmem]" --with-editable . --python 3.12 langgraph dev --allow-blocking
-```
-
-##### Windows / Linux
-
-```bash
-# Abhängigkeiten installieren
-pip install -e .
-pip install -U "langgraph-cli[inmem]"
-
-# LangGraph-Server starten
-langgraph dev
-```
-
-Nach dem Start des LangGraph-Servers sehen Sie mehrere URLs im Terminal:
-
-- API: http://127.0.0.1:2024
-- Studio UI: https://smith.langchain.com/studio/?baseUrl=http://127.0.0.1:2024
-- API-Dokumentation: http://127.0.0.1:2024/docs
-
-Öffnen Sie den Studio UI-Link in Ihrem Browser, um auf die Debugging-Schnittstelle zuzugreifen.
-
-#### Verwendung von LangGraph Studio
-
-In der Studio UI können Sie:
-
-1. Den Workflow-Graphen visualisieren und sehen, wie Komponenten verbunden sind
-2. Die Ausführung in Echtzeit verfolgen, um zu sehen, wie Daten durch das System fließen
-3. Den Zustand in jedem Schritt des Workflows inspizieren
-4. Probleme durch Untersuchung von Ein- und Ausgaben jeder Komponente debuggen
-5. Feedback während der Planungsphase geben, um Forschungspläne zu verfeinern
-
-Wenn Sie ein Forschungsthema in der Studio UI einreichen, können Sie die gesamte Workflow-Ausführung sehen, einschließlich:
-
-- Die Planungsphase, in der der Forschungsplan erstellt wird
-- Die Feedback-Schleife, in der Sie den Plan ändern können
-- Die Forschungs- und Schreibphasen für jeden Abschnitt
-- Die Erstellung des endgültigen Berichts
-
-### Aktivieren von LangSmith-Tracing
-
-DeerFlow unterstützt LangSmith-Tracing, um Ihnen beim Debuggen und Überwachen Ihrer Workflows zu helfen. Um LangSmith-Tracing zu aktivieren:
-
-1. Stellen Sie sicher, dass Ihre `.env`-Datei die folgenden Konfigurationen enthält (siehe `.env.example`):
-
-   ```bash
-   LANGSMITH_TRACING=true
-   LANGSMITH_ENDPOINT="https://api.smith.langchain.com"
-   LANGSMITH_API_KEY="xxx"
-   LANGSMITH_PROJECT="xxx"
-   ```
-
-2. Starten Sie das Tracing mit LangSmith lokal, indem Sie folgenden Befehl ausführen:
-   ```bash
-   langgraph dev
-   ```
-
-Dies aktiviert die Trace-Visualisierung in LangGraph Studio und sendet Ihre Traces zur Überwachung und Analyse an LangSmith.
-
-## Docker
-
-Sie können dieses Projekt auch mit Docker ausführen.
-
-Zuerst müssen Sie die [Konfiguration](docs/configuration_guide.md) unten lesen. Stellen Sie sicher, dass die Dateien `.env` und `.conf.yaml` bereit sind.
-
-Zweitens, um ein Docker-Image Ihres eigenen Webservers zu erstellen:
-
-```bash
-docker build -t deer-flow-api .
-```
-
-Schließlich starten Sie einen Docker-Container, der den Webserver ausführt:
-
-```bash
-# Ersetzen Sie deer-flow-api-app durch Ihren bevorzugten Container-Namen
-# Starten Sie den Server und binden Sie ihn an localhost:8000
-docker run -d -t -p 127.0.0.1:8000:8000 --env-file .env --name deer-flow-api-app deer-flow-api
-
-# Server stoppen
-docker stop deer-flow-api-app
-```
-
-### Docker Compose (umfasst sowohl Backend als auch Frontend)
-
-DeerFlow bietet ein docker-compose-Setup, um sowohl das Backend als auch das Frontend einfach zusammen auszuführen:
-
-```bash
-# Docker-Image erstellen
-docker compose build
-
-# Server starten
-docker compose up
-```
-
-> [!WARNING]
-> Wenn Sie DeerFlow in Produktionsumgebungen bereitstellen möchten, fügen Sie bitte Authentifizierung zur Website hinzu und bewerten Sie Ihre Sicherheitsüberprüfung des MCPServer und Python Repl.
-
-## Beispiele
-
-Die folgenden Beispiele demonstrieren die Fähigkeiten von DeerFlow:
-
-### Forschungsberichte
-
-1. **OpenAI Sora Bericht** - Analyse von OpenAIs Sora KI-Tool
-   - Diskutiert Funktionen, Zugang, Prompt-Engineering, Einschränkungen und ethische Überlegungen
-   - [Vollständigen Bericht ansehen](examples/openai_sora_report.md)
-
-2. **Googles Agent-to-Agent-Protokoll Bericht** - Überblick über Googles Agent-to-Agent (A2A)-Protokoll
-   - Diskutiert seine Rolle in der KI-Agentenkommunikation und seine Beziehung zum Model Context Protocol (MCP) von Anthropic
-   - [Vollständigen Bericht ansehen](examples/what_is_agent_to_agent_protocol.md)
-
-3. **Was ist MCP?** - Eine umfassende Analyse des Begriffs "MCP" in mehreren Kontexten
-   - Untersucht Model Context Protocol in KI, Monocalciumphosphat in der Chemie und Micro-channel Plate in der Elektronik
-   - [Vollständigen Bericht ansehen](examples/what_is_mcp.md)
-
-4. **Bitcoin-Preisschwankungen** - Analyse der jüngsten Bitcoin-Preisbewegungen
-   - Untersucht Markttrends, regulatorische Einflüsse und technische Indikatoren
-   - Bietet Empfehlungen basierend auf historischen Daten
-   - [Vollständigen Bericht ansehen](examples/bitcoin_price_fluctuation.md)
-
-5. **Was ist LLM?** - Eine eingehende Erforschung großer Sprachmodelle
-   - Diskutiert Architektur, Training, Anwendungen und ethische Überlegungen
-   - [Vollständigen Bericht ansehen](examples/what_is_llm.md)
-
-6. **Wie nutzt man Claude für tiefgehende Recherche?** - Best Practices und Workflows für die Verwendung von Claude in der tiefgehenden Forschung
-   - Behandelt Prompt-Engineering, Datenanalyse und Integration mit anderen Tools
-   - [Vollständigen Bericht ansehen](examples/how_to_use_claude_deep_research.md)
-
-7. **KI-Adoption im Gesundheitswesen: Einflussfaktoren** - Analyse der Faktoren, die die KI-Adoption im Gesundheitswesen vorantreiben
-   - Diskutiert KI-Technologien, Datenqualität, ethische Überlegungen, wirtschaftliche Bewertungen, organisatorische Bereitschaft und digitale Infrastruktur
-   - [Vollständigen Bericht ansehen](examples/AI_adoption_in_healthcare.md)
-
-8. **Auswirkungen des Quantencomputing auf die Kryptographie** - Analyse der Auswirkungen des Quantencomputing auf die Kryptographie
-   - Diskutiert Schwachstellen der klassischen Kryptographie, Post-Quanten-Kryptographie und quantenresistente kryptographische Lösungen
-   - [Vollständigen Bericht ansehen](examples/Quantum_Computing_Impact_on_Cryptography.md)
-
-9. **Cristiano Ronaldos Leistungshöhepunkte** - Analyse der Leistungshöhepunkte von Cristiano Ronaldo
-   - Diskutiert seine Karriereerfolge, internationalen Tore und Leistungen in verschiedenen Spielen
-   - [Vollständigen Bericht ansehen](examples/Cristiano_Ronaldo's_Performance_Highlights.md)
-
-Um diese Beispiele auszuführen oder Ihre eigenen Forschungsberichte zu erstellen, können Sie die folgenden Befehle verwenden:
-
-```bash
-# Mit einer spezifischen Anfrage ausführen
-uv run main.py "Welche Faktoren beeinflussen die KI-Adoption im Gesundheitswesen?"
-
-# Mit benutzerdefinierten Planungsparametern ausführen
-uv run main.py --max_plan_iterations 3 "Wie wirkt sich Quantencomputing auf die Kryptographie aus?"
-
-# Im interaktiven Modus mit eingebauten Fragen ausführen
-uv run main.py --interactive
-
-# Oder mit grundlegendem interaktiven Prompt ausführen
-uv run main.py
-
-# Alle verfügbaren Optionen anzeigen
-uv run main.py --help
-```
-
-### Interaktiver Modus
-
-Die Anwendung unterstützt jetzt einen interaktiven Modus mit eingebauten Fragen in Englisch und Chinesisch:
-
-1. Starten Sie den interaktiven Modus:
-
-   ```bash
-   uv run main.py --interactive
-   ```
-
-2. Wählen Sie Ihre bevorzugte Sprache (English oder 中文)
-
-3. Wählen Sie aus einer Liste von eingebauten Fragen oder wählen Sie die Option, Ihre eigene Frage zu stellen
-
-4. Das System wird Ihre Frage verarbeiten und einen umfassenden Forschungsbericht generieren
-
-### Mensch-in-der-Schleife
-DeerFlow enthält einen Mensch-in-der-Schleife-Mechanismus, der es Ihnen ermöglicht, Forschungspläne vor ihrer Ausführung zu überprüfen, zu bearbeiten und zu genehmigen:
-
-1. **Planüberprüfung**: Wenn Mensch-in-der-Schleife aktiviert ist, präsentiert das System den generierten Forschungsplan zur Überprüfung vor der Ausführung
-
-2. **Feedback geben**: Sie können:
-   - Den Plan akzeptieren, indem Sie mit `[ACCEPTED]` antworten
-   - Den Plan bearbeiten, indem Sie Feedback geben (z.B., `[EDIT PLAN] Fügen Sie mehr Schritte zur technischen Implementierung hinzu`)
-   - Das System wird Ihr Feedback einarbeiten und einen überarbeiteten Plan generieren
-
-3. **Automatische Akzeptanz**: Sie können die automatische Akzeptanz aktivieren, um den Überprüfungsprozess zu überspringen:
-   - Über API: Setzen Sie `auto_accepted_plan: true` in Ihrer Anfrage
-
-4. **API-Integration**: Bei Verwendung der API können Sie Feedback über den Parameter `feedback` geben:
-
-   ```json
-   {
-     "messages": [{"role": "user", "content": "Was ist Quantencomputing?"}],
-     "thread_id": "my_thread_id",
-     "auto_accepted_plan": false,
-     "feedback": "[EDIT PLAN] Mehr über Quantenalgorithmen aufnehmen"
-   }
-   ```
-
-### Kommandozeilenargumente
-
-Die Anwendung unterstützt mehrere Kommandozeilenargumente, um ihr Verhalten anzupassen:
-
-- **query**: Die zu verarbeitende Forschungsanfrage (kann mehrere Wörter umfassen)
-- **--interactive**: Im interaktiven Modus mit eingebauten Fragen ausführen
-- **--max_plan_iterations**: Maximale Anzahl von Planungszyklen (Standard: 1)
-- **--max_step_num**: Maximale Anzahl von Schritten in einem Forschungsplan (Standard: 3)
-- **--debug**: Detaillierte Debug-Protokollierung aktivieren
-
-## FAQ
-
-Weitere Informationen finden Sie in der [FAQ.md](docs/FAQ.md).
-
-## Lizenz
-
-Dieses Projekt ist Open Source und unter der [MIT-Lizenz](./LICENSE) verfügbar.
-
-## Danksagungen
-
-DeerFlow baut auf der unglaublichen Arbeit der Open-Source-Community auf. Wir sind allen Projekten und Mitwirkenden zutiefst dankbar, deren Bemühungen DeerFlow möglich gemacht haben. Wahrhaftig stehen wir auf den Schultern von Riesen.
-
-Wir möchten unsere aufrichtige Wertschätzung den folgenden Projekten für ihre unschätzbaren Beiträge aussprechen:
-
-- **[LangChain](https://github.com/langchain-ai/langchain)**: Ihr außergewöhnliches Framework unterstützt unsere LLM-Interaktionen und -Ketten und ermöglicht nahtlose Integration und Funktionalität.
-- **[LangGraph](https://github.com/langchain-ai/langgraph)**: Ihr innovativer Ansatz zur Multi-Agenten-Orchestrierung war maßgeblich für die Ermöglichung der ausgeklügelten Workflows von DeerFlow.
-- **[Novel](https://github.com/steven-tey/novel)**: Ihr Notion-artiger WYSIWYG-Editor unterstützt unsere Berichtbearbeitung und KI-unterstützte Umschreibung.
-- **[RAGFlow](https://github.com/infiniflow/ragflow)**: Wir haben durch die Integration mit RAGFlow die Unterstützung für Forschung auf privaten Wissensdatenbanken der Benutzer erreicht.
-
-Diese Projekte veranschaulichen die transformative Kraft der Open-Source-Zusammenarbeit, und wir sind stolz darauf, auf ihren Grundlagen aufzubauen.
-
-### Hauptmitwirkende
-
-Ein herzliches Dankeschön geht an die Hauptautoren von `DeerFlow`, deren Vision, Leidenschaft und Engagement dieses Projekt zum Leben erweckt haben:
-
-- **[Daniel Walnut](https://github.com/hetaoBackend/)**
-- **[Henry Li](https://github.com/magiccube/)**
-
-Ihr unerschütterliches Engagement und Fachwissen waren die treibende Kraft hinter dem Erfolg von DeerFlow. Wir fühlen uns geehrt, Sie an der Spitze dieser Reise zu haben.
-
-## Star-Verlauf
-
-[![Star History Chart](https://api.star-history.com/svg?repos=bytedance/deer-flow&type=Date)](https://star-history.com/#bytedance/deer-flow&Date)

README_es.md

@@ -1,607 +0,0 @@
-# 🦌 DeerFlow
-
-[![Python 3.12+](https://img.shields.io/badge/python-3.12+-blue.svg)](https://www.python.org/downloads/)
-[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
-[![DeepWiki](https://img.shields.io/badge/DeepWiki-bytedance%2Fdeer--flow-blue.svg?logo=data:image/png;base64,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)](https://deepwiki.com/bytedance/deer-flow)
-<!-- DeepWiki badge generated by https://deepwiki.ryoppippi.com/ -->
-
-[English](./README.md) | [简体中文](./README_zh.md) | [日本語](./README_ja.md) | [Deutsch](./README_de.md) | [Español](./README_es.md) | [Русский](./README_ru.md)  | [Portuguese](./README_pt.md)
-
-> Originado del código abierto, retribuido al código abierto.
-
-**DeerFlow** (**D**eep **E**xploration and **E**fficient **R**esearch **Flow**) es un marco de Investigación Profunda impulsado por la comunidad que se basa en el increíble trabajo de la comunidad de código abierto. Nuestro objetivo es combinar modelos de lenguaje con herramientas especializadas para tareas como búsqueda web, rastreo y ejecución de código Python, mientras devolvemos a la comunidad que hizo esto posible.
-
-Actualmente, DeerFlow ha ingresado oficialmente al Centro de Aplicaciones FaaS de Volcengine. Los usuarios pueden experimentarlo en línea a través del enlace de experiencia para sentir intuitivamente sus potentes funciones y operaciones convenientes. Al mismo tiempo, para satisfacer las necesidades de implementación de diferentes usuarios, DeerFlow admite la implementación con un clic basada en Volcengine. Haga clic en el enlace de implementación para completar rápidamente el proceso de implementación y comenzar un viaje de investigación eficiente.
-
-DeerFlow ha integrado recientemente el conjunto de herramientas de búsqueda y rastreo inteligente desarrollado independientemente por BytePlus - [InfoQuest (admite experiencia gratuita en línea)](https://docs.byteplus.com/en/docs/InfoQuest/What_is_Info_Quest)
-
-<a href="https://docs.byteplus.com/en/docs/InfoQuest/What_is_Info_Quest" target="_blank">
-  <img 
-    src="https://sf16-sg.tiktokcdn.com/obj/eden-sg/hubseh7bsbps/20251208-160108.png"   alt="infoquest_bannar" 
-  />
-</a>
-
-Por favor, visita [nuestra página web oficial](https://deerflow.tech/) para más detalles.
-
-## Demostración
-
-### Video
-
-<https://github.com/user-attachments/assets/f3786598-1f2a-4d07-919e-8b99dfa1de3e>
-
-En esta demostración, mostramos cómo usar DeerFlow para:
-
-- Integrar perfectamente con servicios MCP
-- Realizar el proceso de Investigación Profunda y producir un informe completo con imágenes
-- Crear audio de podcast basado en el informe generado
-
-### Repeticiones
-
-- [¿Qué altura tiene la Torre Eiffel comparada con el edificio más alto?](https://deerflow.tech/chat?replay=eiffel-tower-vs-tallest-building)
-- [¿Cuáles son los repositorios más populares en GitHub?](https://deerflow.tech/chat?replay=github-top-trending-repo)
-- [Escribir un artículo sobre los platos tradicionales de Nanjing](https://deerflow.tech/chat?replay=nanjing-traditional-dishes)
-- [¿Cómo decorar un apartamento de alquiler?](https://deerflow.tech/chat?replay=rental-apartment-decoration)
-- [Visita nuestra página web oficial para explorar más repeticiones.](https://deerflow.tech/#case-studies)
-
----
-
-## 📑 Tabla de Contenidos
-
-- [🚀 Inicio Rápido](#inicio-rápido)
-- [🌟 Características](#características)
-- [🏗️ Arquitectura](#arquitectura)
-- [🛠️ Desarrollo](#desarrollo)
-- [🐳 Docker](#docker)
-- [🗣️ Integración de Texto a Voz](#integración-de-texto-a-voz)
-- [📚 Ejemplos](#ejemplos)
-- [❓ Preguntas Frecuentes](#preguntas-frecuentes)
-- [📜 Licencia](#licencia)
-- [💖 Agradecimientos](#agradecimientos)
-- [⭐ Historial de Estrellas](#historial-de-estrellas)
-
-## Inicio Rápido
-
-DeerFlow está desarrollado en Python y viene con una interfaz web escrita en Node.js. Para garantizar un proceso de configuración sin problemas, recomendamos utilizar las siguientes herramientas:
-
-### Herramientas Recomendadas
-
-- **[`uv`](https://docs.astral.sh/uv/getting-started/installation/):**
-  Simplifica la gestión del entorno Python y las dependencias. `uv` crea automáticamente un entorno virtual en el directorio raíz e instala todos los paquetes necesarios por ti—sin necesidad de instalar entornos Python manualmente.
-
-- **[`nvm`](https://github.com/nvm-sh/nvm):**
-  Gestiona múltiples versiones del entorno de ejecución Node.js sin esfuerzo.
-
-- **[`pnpm`](https://pnpm.io/installation):**
-  Instala y gestiona dependencias del proyecto Node.js.
-
-### Requisitos del Entorno
-
-Asegúrate de que tu sistema cumple con los siguientes requisitos mínimos:
-
-- **[Python](https://www.python.org/downloads/):** Versión `3.12+`
-- **[Node.js](https://nodejs.org/en/download/):** Versión `22+`
-
-### Instalación
-
-```bash
-# Clonar el repositorio
-git clone https://github.com/bytedance/deer-flow.git
-cd deer-flow
-
-# Instalar dependencias, uv se encargará del intérprete de python, la creación del entorno virtual y la instalación de los paquetes necesarios
-uv sync
-
-# Configurar .env con tus claves API
-# Tavily: https://app.tavily.com/home
-# Brave_SEARCH: https://brave.com/search/api/
-# volcengine TTS: Añade tus credenciales TTS si las tienes
-cp .env.example .env
-
-# Ver las secciones 'Motores de Búsqueda Compatibles' e 'Integración de Texto a Voz' a continuación para todas las opciones disponibles
-
-# Configurar conf.yaml para tu modelo LLM y claves API
-# Por favor, consulta 'docs/configuration_guide.md' para más detalles
-cp conf.yaml.example conf.yaml
-
-# Instalar marp para la generación de presentaciones
-# https://github.com/marp-team/marp-cli?tab=readme-ov-file#use-package-manager
-brew install marp-cli
-```
-
-Opcionalmente, instala las dependencias de la interfaz web vía [pnpm](https://pnpm.io/installation):
-
-```bash
-cd deer-flow/web
-pnpm install
-```
-
-### Configuraciones
-
-Por favor, consulta la [Guía de Configuración](docs/configuration_guide.md) para más detalles.
-
-> [!NOTA]
-> Antes de iniciar el proyecto, lee la guía cuidadosamente y actualiza las configuraciones para que coincidan con tus ajustes y requisitos específicos.
-
-### Interfaz de Consola
-
-La forma más rápida de ejecutar el proyecto es utilizar la interfaz de consola.
-
-```bash
-# Ejecutar el proyecto en un shell tipo bash
-uv run main.py
-```
-
-### Interfaz Web
-
-Este proyecto también incluye una Interfaz Web, que ofrece una experiencia interactiva más dinámica y atractiva.
-
-> [!NOTA]
-> Necesitas instalar primero las dependencias de la interfaz web.
-
-```bash
-# Ejecutar tanto el servidor backend como el frontend en modo desarrollo
-# En macOS/Linux
-./bootstrap.sh -d
-
-# En Windows
-bootstrap.bat -d
-```
-> [!NOTA]
-> Por defecto, el servidor backend se enlaza a 127.0.0.1 (localhost) por razones de seguridad. Si necesitas permitir conexiones externas (por ejemplo, al desplegar en un servidor Linux), puedes modificar el host del servidor a 0.0.0.0 en el script de arranque (uv run server.py --host 0.0.0.0).
-> Por favor, asegúrate de que tu entorno esté correctamente protegido antes de exponer el servicio a redes externas.
-
-Abre tu navegador y visita [`http://localhost:3000`](http://localhost:3000) para explorar la interfaz web.
-
-Explora más detalles en el directorio [`web`](./web/).
-
-## Motores de Búsqueda Compatibles
-
-DeerFlow soporta múltiples motores de búsqueda que pueden configurarse en tu archivo `.env` usando la variable `SEARCH_API`:
-
-- **Tavily** (predeterminado): Una API de búsqueda especializada para aplicaciones de IA
-
-  - Requiere `TAVILY_API_KEY` en tu archivo `.env`
-  - Regístrate en: <https://app.tavily.com/home>
-
-- **InfoQuest** (recomendado): Un conjunto de herramientas inteligentes de búsqueda y rastreo optimizadas para IA, desarrollado por BytePlus
-  - Requiere `INFOQUEST_API_KEY` en tu archivo `.env`
-  - Soporte para filtrado por rango de fecha y filtrado de sitios web
-  - Proporciona resultados de búsqueda y extracción de contenido de alta calidad
-  - Regístrate en: <https://console.byteplus.com/infoquest/infoquests>
-  - Visita https://docs.byteplus.com/es/docs/InfoQuest/What_is_Info_Quest para obtener más información
-
-- **DuckDuckGo**: Motor de búsqueda centrado en la privacidad
-
-  - No requiere clave API
-
-- **Brave Search**: Motor de búsqueda centrado en la privacidad con características avanzadas
-
-  - Requiere `BRAVE_SEARCH_API_KEY` en tu archivo `.env`
-  - Regístrate en: <https://brave.com/search/api/>
-
-- **Arxiv**: Búsqueda de artículos científicos para investigación académica
-  - No requiere clave API
-  - Especializado en artículos científicos y académicos
-
-- **Searx/SearxNG**: Motor de metabúsqueda autoalojado
-  - Requiere `SEARX_HOST` en tu archivo `.env`
-  - Compatible con Searx o SearxNG
-
-Para configurar tu motor de búsqueda preferido, establece la variable `SEARCH_API` en tu archivo `.env`:
-
-```bash
-# Elige uno: tavily, infoquest, duckduckgo, brave_search, arxiv
-SEARCH_API=tavily
-```
-
-### Herramientas de Rastreo
-
-- **Jina** (predeterminado): Herramienta gratuita de rastreo de contenido web accesible
-  - No se requiere clave API para usar funciones básicas
-  - Al usar una clave API, se obtienen límites de tasa de acceso más altos
-  - Visite <https://jina.ai/reader> para obtener más información
-
-- **InfoQuest** (recomendado): Conjunto de herramientas inteligentes de búsqueda y rastreo optimizadas para IA, desarrollado por BytePlus
-  - Requiere `INFOQUEST_API_KEY` en tu archivo `.env`
-  - Proporciona parámetros de rastreo configurables
-  - Admite configuración de tiempo de espera personalizada
-  - Ofrece capacidades más potentes de extracción de contenido
-  - Visita <https://docs.byteplus.com/es/docs/InfoQuest/What_is_Info_Quest> para obtener más información
-
-Para configurar su herramienta de rastreo preferida, establezca lo siguiente en su archivo `conf.yaml`:
-
-```yaml
-CRAWLER_ENGINE:
-  # Tipo de motor: "jina" (predeterminado) o "infoquest"
-  engine: infoquest
-```
-
-## Características
-
-### Capacidades Principales
-
-- 🤖 **Integración de LLM**
-  - Soporta la integración de la mayoría de los modelos a través de [litellm](https://docs.litellm.ai/docs/providers).
-  - Soporte para modelos de código abierto como Qwen
-  - Interfaz API compatible con OpenAI
-  - Sistema LLM de múltiples niveles para diferentes complejidades de tareas
-
-### Herramientas e Integraciones MCP
-
-- 🔍 **Búsqueda y Recuperación**
-
-  - Búsqueda web a través de Tavily, InfoQuest, Brave Search y más
-  - Rastreo con Jina e InfoQuest
-  - Extracción avanzada de contenido
-
-- 🔗 **Integración Perfecta con MCP**
-  - Amplía capacidades para acceso a dominio privado, gráfico de conocimiento, navegación web y más
-  - Facilita la integración de diversas herramientas y metodologías de investigación
-
-### Colaboración Humana
-
-- 🧠 **Humano en el Bucle**
-
-  - Soporta modificación interactiva de planes de investigación usando lenguaje natural
-  - Soporta aceptación automática de planes de investigación
-
-- 📝 **Post-Edición de Informes**
-  - Soporta edición de bloques tipo Notion
-  - Permite refinamientos por IA, incluyendo pulido asistido por IA, acortamiento y expansión de oraciones
-  - Impulsado por [tiptap](https://tiptap.dev/)
-
-### Creación de Contenido
-
-- 🎙️ **Generación de Podcasts y Presentaciones**
-  - Generación de guiones de podcast y síntesis de audio impulsadas por IA
-  - Creación automatizada de presentaciones PowerPoint simples
-  - Plantillas personalizables para contenido a medida
-
-## Arquitectura
-
-DeerFlow implementa una arquitectura modular de sistema multi-agente diseñada para investigación automatizada y análisis de código. El sistema está construido sobre LangGraph, permitiendo un flujo de trabajo flexible basado en estados donde los componentes se comunican a través de un sistema de paso de mensajes bien definido.
-
-![Diagrama de Arquitectura](./assets/architecture.png)
-
-> Vélo en vivo en [deerflow.tech](https://deerflow.tech/#multi-agent-architecture)
-
-El sistema emplea un flujo de trabajo racionalizado con los siguientes componentes:
-
-1. **Coordinador**: El punto de entrada que gestiona el ciclo de vida del flujo de trabajo
-
-   - Inicia el proceso de investigación basado en la entrada del usuario
-   - Delega tareas al planificador cuando corresponde
-   - Actúa como la interfaz principal entre el usuario y el sistema
-
-2. **Planificador**: Componente estratégico para descomposición y planificación de tareas
-
-   - Analiza objetivos de investigación y crea planes de ejecución estructurados
-   - Determina si hay suficiente contexto disponible o si se necesita más investigación
-   - Gestiona el flujo de investigación y decide cuándo generar el informe final
-
-3. **Equipo de Investigación**: Una colección de agentes especializados que ejecutan el plan:
-
-   - **Investigador**: Realiza búsquedas web y recopilación de información utilizando herramientas como motores de búsqueda web, rastreo e incluso servicios MCP.
-   - **Programador**: Maneja análisis de código, ejecución y tareas técnicas utilizando la herramienta Python REPL.
-     Cada agente tiene acceso a herramientas específicas optimizadas para su rol y opera dentro del marco LangGraph
-
-4. **Reportero**: Procesador de etapa final para los resultados de la investigación
-   - Agrega hallazgos del equipo de investigación
-   - Procesa y estructura la información recopilada
-   - Genera informes de investigación completos
-
-## Integración de Texto a Voz
-
-DeerFlow ahora incluye una función de Texto a Voz (TTS) que te permite convertir informes de investigación a voz. Esta función utiliza la API TTS de volcengine para generar audio de alta calidad a partir de texto. Características como velocidad, volumen y tono también son personalizables.
-
-### Usando la API TTS
-
-Puedes acceder a la funcionalidad TTS a través del punto final `/api/tts`:
-
-```bash
-# Ejemplo de llamada API usando curl
-curl --location 'http://localhost:8000/api/tts' \
---header 'Content-Type: application/json' \
---data '{
-    "text": "Esto es una prueba de la funcionalidad de texto a voz.",
-    "speed_ratio": 1.0,
-    "volume_ratio": 1.0,
-    "pitch_ratio": 1.0
-}' \
---output speech.mp3
-```
-
-## Desarrollo
-
-### Pruebas
-
-Ejecuta el conjunto de pruebas:
-
-```bash
-# Ejecutar todas las pruebas
-make test
-
-# Ejecutar archivo de prueba específico
-pytest tests/integration/test_workflow.py
-
-# Ejecutar con cobertura
-make coverage
-```
-
-### Calidad del Código
-
-```bash
-# Ejecutar linting
-make lint
-
-# Formatear código
-make format
-```
-
-### Depuración con LangGraph Studio
-
-DeerFlow utiliza LangGraph para su arquitectura de flujo de trabajo. Puedes usar LangGraph Studio para depurar y visualizar el flujo de trabajo en tiempo real.
-
-#### Ejecutando LangGraph Studio Localmente
-
-DeerFlow incluye un archivo de configuración `langgraph.json` que define la estructura del grafo y las dependencias para LangGraph Studio. Este archivo apunta a los grafos de flujo de trabajo definidos en el proyecto y carga automáticamente variables de entorno desde el archivo `.env`.
-
-##### Mac
-
-```bash
-# Instala el gestor de paquetes uv si no lo tienes
-curl -LsSf https://astral.sh/uv/install.sh | sh
-
-# Instala dependencias e inicia el servidor LangGraph
-uvx --refresh --from "langgraph-cli[inmem]" --with-editable . --python 3.12 langgraph dev --allow-blocking
-```
-
-##### Windows / Linux
-
-```bash
-# Instalar dependencias
-pip install -e .
-pip install -U "langgraph-cli[inmem]"
-
-# Iniciar el servidor LangGraph
-langgraph dev
-```
-
-Después de iniciar el servidor LangGraph, verás varias URLs en la terminal:
-
-- API: <http://127.0.0.1:2024>
-- UI de Studio: <https://smith.langchain.com/studio/?baseUrl=http://127.0.0.1:2024>
-- Docs de API: <http://127.0.0.1:2024/docs>
-
-Abre el enlace de UI de Studio en tu navegador para acceder a la interfaz de depuración.
-
-#### Usando LangGraph Studio
-
-En la UI de Studio, puedes:
-
-1. Visualizar el grafo de flujo de trabajo y ver cómo se conectan los componentes
-2. Rastrear la ejecución en tiempo real para ver cómo fluyen los datos a través del sistema
-3. Inspeccionar el estado en cada paso del flujo de trabajo
-4. Depurar problemas examinando entradas y salidas de cada componente
-5. Proporcionar retroalimentación durante la fase de planificación para refinar planes de investigación
-
-Cuando envías un tema de investigación en la UI de Studio, podrás ver toda la ejecución del flujo de trabajo, incluyendo:
-
-- La fase de planificación donde se crea el plan de investigación
-- El bucle de retroalimentación donde puedes modificar el plan
-- Las fases de investigación y escritura para cada sección
-- La generación del informe final
-
-### Habilitando el Rastreo de LangSmith
-
-DeerFlow soporta el rastreo de LangSmith para ayudarte a depurar y monitorear tus flujos de trabajo. Para habilitar el rastreo de LangSmith:
-
-1. Asegúrate de que tu archivo `.env` tenga las siguientes configuraciones (ver `.env.example`):
-
-   ```bash
-   LANGSMITH_TRACING=true
-   LANGSMITH_ENDPOINT="https://api.smith.langchain.com"
-   LANGSMITH_API_KEY="xxx"
-   LANGSMITH_PROJECT="xxx"
-   ```
-
-2. Inicia el rastreo y visualiza el grafo localmente con LangSmith ejecutando:
-
-   ```bash
-   langgraph dev
-   ```
-
-Esto habilitará la visualización de rastros en LangGraph Studio y enviará tus rastros a LangSmith para monitoreo y análisis.
-
-## Docker
-
-También puedes ejecutar este proyecto con Docker.
-
-Primero, necesitas leer la [configuración](docs/configuration_guide.md) a continuación. Asegúrate de que los archivos `.env` y `.conf.yaml` estén listos.
-
-Segundo, para construir una imagen Docker de tu propio servidor web:
-
-```bash
-docker build -t deer-flow-api .
-```
-
-Finalmente, inicia un contenedor Docker que ejecute el servidor web:
-
-```bash
-# Reemplaza deer-flow-api-app con tu nombre de contenedor preferido
-# Inicia el servidor y enlázalo a localhost:8000
-docker run -d -t -p 127.0.0.1:8000:8000 --env-file .env --name deer-flow-api-app deer-flow-api
-
-# detener el servidor
-docker stop deer-flow-api-app
-```
-
-### Docker Compose (incluye tanto backend como frontend)
-
-DeerFlow proporciona una configuración docker-compose para ejecutar fácilmente tanto el backend como el frontend juntos:
-
-```bash
-# construir imagen docker
-docker compose build
-
-# iniciar el servidor
-docker compose up
-```
-
-> [!WARNING]
-> Si desea implementar DeerFlow en entornos de producción, agregue autenticación al sitio web y evalúe su verificación de seguridad del MCPServer y Python Repl.
-
-## Ejemplos
-
-Los siguientes ejemplos demuestran las capacidades de DeerFlow:
-
-### Informes de Investigación
-
-1. **Informe sobre OpenAI Sora** - Análisis de la herramienta IA Sora de OpenAI
-
-   - Discute características, acceso, ingeniería de prompts, limitaciones y consideraciones éticas
-   - [Ver informe completo](examples/openai_sora_report.md)
-
-2. **Informe sobre el Protocolo Agent to Agent de Google** - Visión general del protocolo Agent to Agent (A2A) de Google
-
-   - Discute su papel en la comunicación de agentes IA y su relación con el Model Context Protocol (MCP) de Anthropic
-   - [Ver informe completo](examples/what_is_agent_to_agent_protocol.md)
-
-3. **¿Qué es MCP?** - Un análisis completo del término "MCP" en múltiples contextos
-
-   - Explora Model Context Protocol en IA, Fosfato Monocálcico en química y Placa de Microcanales en electrónica
-   - [Ver informe completo](examples/what_is_mcp.md)
-
-4. **Fluctuaciones del Precio de Bitcoin** - Análisis de los movimientos recientes del precio de Bitcoin
-
-   - Examina tendencias del mercado, influencias regulatorias e indicadores técnicos
-   - Proporciona recomendaciones basadas en datos históricos
-   - [Ver informe completo](examples/bitcoin_price_fluctuation.md)
-
-5. **¿Qué es LLM?** - Una exploración en profundidad de los Modelos de Lenguaje Grandes
-
-   - Discute arquitectura, entrenamiento, aplicaciones y consideraciones éticas
-   - [Ver informe completo](examples/what_is_llm.md)
-
-6. **¿Cómo usar Claude para Investigación Profunda?** - Mejores prácticas y flujos de trabajo para usar Claude en investigación profunda
-
-   - Cubre ingeniería de prompts, análisis de datos e integración con otras herramientas
-   - [Ver informe completo](examples/how_to_use_claude_deep_research.md)
-
-7. **Adopción de IA en Salud: Factores de Influencia** - Análisis de factores que impulsan la adopción de IA en salud
-
-   - Discute tecnologías IA, calidad de datos, consideraciones éticas, evaluaciones económicas, preparación organizativa e infraestructura digital
-   - [Ver informe completo](examples/AI_adoption_in_healthcare.md)
-
-8. **Impacto de la Computación Cuántica en la Criptografía** - Análisis del impacto de la computación cuántica en la criptografía
-
-   - Discute vulnerabilidades de la criptografía clásica, criptografía post-cuántica y soluciones criptográficas resistentes a la cuántica
-   - [Ver informe completo](examples/Quantum_Computing_Impact_on_Cryptography.md)
-
-9. **Aspectos Destacados del Rendimiento de Cristiano Ronaldo** - Análisis de los aspectos destacados del rendimiento de Cristiano Ronaldo
-   - Discute sus logros profesionales, goles internacionales y rendimiento en varios partidos
-   - [Ver informe completo](examples/Cristiano_Ronaldo's_Performance_Highlights.md)
-
-Para ejecutar estos ejemplos o crear tus propios informes de investigación, puedes usar los siguientes comandos:
-
-```bash
-# Ejecutar con una consulta específica
-uv run main.py "¿Qué factores están influyendo en la adopción de IA en salud?"
-
-# Ejecutar con parámetros de planificación personalizados
-uv run main.py --max_plan_iterations 3 "¿Cómo impacta la computación cuántica en la criptografía?"
-
-# Ejecutar en modo interactivo con preguntas integradas
-uv run main.py --interactive
-
-# O ejecutar con prompt interactivo básico
-uv run main.py
-
-# Ver todas las opciones disponibles
-uv run main.py --help
-```
-
-### Modo Interactivo
-
-La aplicación ahora soporta un modo interactivo con preguntas integradas tanto en inglés como en chino:
-
-1. Lanza el modo interactivo:
-
-   ```bash
-   uv run main.py --interactive
-   ```
-
-2. Selecciona tu idioma preferido (English o 中文)
-
-3. Elige de una lista de preguntas integradas o selecciona la opción para hacer tu propia pregunta
-
-4. El sistema procesará tu pregunta y generará un informe de investigación completo
-
-### Humano en el Bucle
-
-DeerFlow incluye un mecanismo de humano en el bucle que te permite revisar, editar y aprobar planes de investigación antes de que sean ejecutados:
-
-1. **Revisión del Plan**: Cuando el humano en el bucle está habilitado, el sistema presentará el plan de investigación generado para tu revisión antes de la ejecución
-
-2. **Proporcionando Retroalimentación**: Puedes:
-
-   - Aceptar el plan respondiendo con `[ACCEPTED]`
-   - Editar el plan proporcionando retroalimentación (p.ej., `[EDIT PLAN] Añadir más pasos sobre implementación técnica`)
-   - El sistema incorporará tu retroalimentación y generará un plan revisado
-
-3. **Auto-aceptación**: Puedes habilitar la auto-aceptación para omitir el proceso de revisión:
-
-   - Vía API: Establece `auto_accepted_plan: true` en tu solicitud
-
-4. **Integración API**: Cuando uses la API, puedes proporcionar retroalimentación a través del parámetro `feedback`:
-
-   ```json
-   {
-     "messages": [{ "role": "user", "content": "¿Qué es la computación cuántica?" }],
-     "thread_id": "my_thread_id",
-     "auto_accepted_plan": false,
-     "feedback": "[EDIT PLAN] Incluir más sobre algoritmos cuánticos"
-   }
-   ```
-
-### Argumentos de Línea de Comandos
-
-La aplicación soporta varios argumentos de línea de comandos para personalizar su comportamiento:
-
-- **query**: La consulta de investigación a procesar (puede ser múltiples palabras)
-- **--interactive**: Ejecutar en modo interactivo con preguntas integradas
-- **--max_plan_iterations**: Número máximo de ciclos de planificación (predeterminado: 1)
-- **--max_step_num**: Número máximo de pasos en un plan de investigación (predeterminado: 3)
-- **--debug**: Habilitar registro detallado de depuración
-
-## Preguntas Frecuentes
-
-Por favor, consulta [FAQ.md](docs/FAQ.md) para más detalles.
-
-## Licencia
-
-Este proyecto es de código abierto y está disponible bajo la [Licencia MIT](./LICENSE).
-
-## Agradecimientos
-
-DeerFlow está construido sobre el increíble trabajo de la comunidad de código abierto. Estamos profundamente agradecidos a todos los proyectos y contribuyentes cuyos esfuerzos han hecho posible DeerFlow. Verdaderamente, nos apoyamos en hombros de gigantes.
-
-Nos gustaría extender nuestro sincero agradecimiento a los siguientes proyectos por sus invaluables contribuciones:
-
-- **[LangChain](https://github.com/langchain-ai/langchain)**: Su excepcional marco impulsa nuestras interacciones y cadenas LLM, permitiendo integración y funcionalidad sin problemas.
-- **[LangGraph](https://github.com/langchain-ai/langgraph)**: Su enfoque innovador para la orquestación multi-agente ha sido instrumental en permitir los sofisticados flujos de trabajo de DeerFlow.
-
-Estos proyectos ejemplifican el poder transformador de la colaboración de código abierto, y estamos orgullosos de construir sobre sus cimientos.
-
-### Contribuyentes Clave
-
-Un sentido agradecimiento va para los autores principales de `DeerFlow`, cuya visión, pasión y dedicación han dado vida a este proyecto:
-
-- **[Daniel Walnut](https://github.com/hetaoBackend/)**
-- **[Henry Li](https://github.com/magiccube/)**
-
-Su compromiso inquebrantable y experiencia han sido la fuerza impulsora detrás del éxito de DeerFlow. Nos sentimos honrados de tenerlos al timón de este viaje.
-
-## Historial de Estrellas
-
-[![Gráfico de Historial de Estrellas](https://api.star-history.com/svg?repos=bytedance/deer-flow&type=Date)](https://star-history.com/#bytedance/deer-flow&Date)

README_fr.md

@@ -0,0 +1,610 @@
+# 🦌 DeerFlow - 2.0
+
+[English](./README.md) | [中文](./README_zh.md) | [日本語](./README_ja.md) | Français | [Русский](./README_ru.md)
+
+[![Python](https://img.shields.io/badge/Python-3.12%2B-3776AB?logo=python&logoColor=white)](./backend/pyproject.toml)
+[![Node.js](https://img.shields.io/badge/Node.js-22%2B-339933?logo=node.js&logoColor=white)](./Makefile)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](./LICENSE)
+
+<a href="https://trendshift.io/repositories/14699" target="_blank"><img src="https://trendshift.io/api/badge/repositories/14699" alt="bytedance%2Fdeer-flow | Trendshift" style="width: 250px; height: 55px;" width="250" height="55"/></a>
+> Le 28 février 2026, DeerFlow a décroché la 🏆 1re place sur GitHub Trending suite au lancement de la version 2. Un immense merci à notre incroyable communauté — c'est grâce à vous ! 💪🔥
+
+DeerFlow (**D**eep **E**xploration and **E**fficient **R**esearch **Flow**) est un **super agent harness** open source qui orchestre des **sub-agents**, de la **mémoire** et des **sandboxes** pour accomplir pratiquement n'importe quelle tâche — le tout propulsé par des **skills extensibles**.
+
+https://github.com/user-attachments/assets/a8bcadc4-e040-4cf2-8fda-dd768b999c18
+
+> [!NOTE]
+> **DeerFlow 2.0 est une réécriture complète.** Il ne partage aucun code avec la v1. Si vous cherchez le framework Deep Research original, il est maintenu sur la [branche `1.x`](https://github.com/bytedance/deer-flow/tree/main-1.x) — les contributions y sont toujours les bienvenues. Le développement actif a migré vers la 2.0.
+
+## Site officiel
+
+[<img width="2880" height="1600" alt="image" src="https://github.com/user-attachments/assets/a598c49f-3b2f-41ea-a052-05e21349188a" />](https://deerflow.tech)
+
+Découvrez-en plus et regardez des **démos réelles** sur notre [**site officiel**](https://deerflow.tech).
+
+## Coding Plan de ByteDance Volcengine
+
+<img width="4808" height="2400" alt="英文方舟" src="https://github.com/user-attachments/assets/2ecc7b9d-50be-4185-b1f7-5542d222fb2d" />
+
+- Nous recommandons fortement d'utiliser Doubao-Seed-2.0-Code, DeepSeek v3.2 et Kimi 2.5 pour exécuter DeerFlow
+- [En savoir plus](https://www.byteplus.com/en/activity/codingplan?utm_campaign=deer_flow&utm_content=deer_flow&utm_medium=devrel&utm_source=OWO&utm_term=deer_flow)
+- [Développeurs en Chine continentale, cliquez ici](https://www.volcengine.com/activity/codingplan?utm_campaign=deer_flow&utm_content=deer_flow&utm_medium=devrel&utm_source=OWO&utm_term=deer_flow)
+
+## InfoQuest
+
+DeerFlow intègre désormais le toolkit de recherche et de crawling intelligent développé par BytePlus — [InfoQuest (essai gratuit en ligne)](https://docs.byteplus.com/en/docs/InfoQuest/What_is_Info_Quest)
+
+<a href="https://docs.byteplus.com/en/docs/InfoQuest/What_is_Info_Quest" target="_blank">
+  <img
+    src="https://sf16-sg.tiktokcdn.com/obj/eden-sg/hubseh7bsbps/20251208-160108.png"   alt="InfoQuest_banner"
+  />
+</a>
+
+---
+
+## Table des matières
+
+- [🦌 DeerFlow - 2.0](#-deerflow---20)
+  - [Site officiel](#site-officiel)
+  - [InfoQuest](#infoquest)
+  - [Table des matières](#table-des-matières)
+  - [Installation en une phrase pour un coding agent](#installation-en-une-phrase-pour-un-coding-agent)
+  - [Démarrage rapide](#démarrage-rapide)
+    - [Configuration](#configuration)
+    - [Lancer l'application](#lancer-lapplication)
+      - [Option 1 : Docker (recommandé)](#option-1--docker-recommandé)
+      - [Option 2 : Développement local](#option-2--développement-local)
+    - [Avancé](#avancé)
+      - [Mode Sandbox](#mode-sandbox)
+      - [Serveur MCP](#serveur-mcp)
+      - [Canaux de messagerie](#canaux-de-messagerie)
+      - [Traçage LangSmith](#traçage-langsmith)
+  - [Du Deep Research au Super Agent Harness](#du-deep-research-au-super-agent-harness)
+  - [Fonctionnalités principales](#fonctionnalités-principales)
+    - [Skills et outils](#skills-et-outils)
+      - [Intégration Claude Code](#intégration-claude-code)
+    - [Sub-Agents](#sub-agents)
+    - [Sandbox et système de fichiers](#sandbox-et-système-de-fichiers)
+    - [Context Engineering](#context-engineering)
+    - [Mémoire à long terme](#mémoire-à-long-terme)
+  - [Modèles recommandés](#modèles-recommandés)
+  - [Client Python intégré](#client-python-intégré)
+  - [Documentation](#documentation)
+  - [⚠️ Avertissement de sécurité](#️-avertissement-de-sécurité)
+  - [Contribuer](#contribuer)
+  - [Licence](#licence)
+  - [Remerciements](#remerciements)
+    - [Contributeurs principaux](#contributeurs-principaux)
+  - [Star History](#star-history)
+
+## Installation en une phrase pour un coding agent
+
+Si vous utilisez Claude Code, Codex, Cursor, Windsurf ou un autre coding agent, vous pouvez simplement lui envoyer cette phrase :
+
+```text
+Aide-moi à cloner DeerFlow si nécessaire, puis à initialiser son environnement de développement local en suivant https://raw.githubusercontent.com/bytedance/deer-flow/main/Install.md
+```
+
+Ce prompt est destiné aux coding agents. Il leur demande de cloner le dépôt si nécessaire, de privilégier Docker quand il est disponible, puis de s'arrêter avec la commande exacte pour lancer DeerFlow et la liste des configurations encore manquantes.
+
+## Démarrage rapide
+
+### Configuration
+
+1. **Cloner le dépôt DeerFlow**
+
+   ```bash
+   git clone https://github.com/bytedance/deer-flow.git
+   cd deer-flow
+   ```
+
+2. **Générer les fichiers de configuration locaux**
+
+   Depuis le répertoire racine du projet (`deer-flow/`), exécutez :
+
+   ```bash
+   make config
+   ```
+
+   Cette commande crée les fichiers de configuration locaux à partir des templates fournis.
+
+3. **Configurer le(s) modèle(s) de votre choix**
+
+   Éditez `config.yaml` et définissez au moins un modèle :
+
+   ```yaml
+   models:
+     - name: gpt-4                       # Internal identifier
+       display_name: GPT-4               # Human-readable name
+       use: langchain_openai:ChatOpenAI  # LangChain class path
+       model: gpt-4                      # Model identifier for API
+       api_key: $OPENAI_API_KEY          # API key (recommended: use env var)
+       max_tokens: 4096                  # Maximum tokens per request
+       temperature: 0.7                  # Sampling temperature
+
+     - name: openrouter-gemini-2.5-flash
+       display_name: Gemini 2.5 Flash (OpenRouter)
+       use: langchain_openai:ChatOpenAI
+       model: google/gemini-2.5-flash-preview
+       api_key: $OPENAI_API_KEY          # OpenRouter still uses the OpenAI-compatible field name here
+       base_url: https://openrouter.ai/api/v1
+
+     - name: gpt-5-responses
+       display_name: GPT-5 (Responses API)
+       use: langchain_openai:ChatOpenAI
+       model: gpt-5
+       api_key: $OPENAI_API_KEY
+       use_responses_api: true
+       output_version: responses/v1
+   ```
+
+   OpenRouter et les passerelles compatibles OpenAI similaires doivent être configurés avec `langchain_openai:ChatOpenAI` et `base_url`. Si vous préférez utiliser un nom de variable d'environnement propre au fournisseur, pointez `api_key` vers cette variable explicitement (par exemple `api_key: $OPENROUTER_API_KEY`).
+
+   Pour router les modèles OpenAI via `/v1/responses`, continuez d'utiliser `langchain_openai:ChatOpenAI` et définissez `use_responses_api: true` avec `output_version: responses/v1`.
+
+   Exemples de providers basés sur un CLI :
+
+   ```yaml
+   models:
+     - name: gpt-5.4
+       display_name: GPT-5.4 (Codex CLI)
+       use: deerflow.models.openai_codex_provider:CodexChatModel
+       model: gpt-5.4
+       supports_thinking: true
+       supports_reasoning_effort: true
+
+     - name: claude-sonnet-4.6
+       display_name: Claude Sonnet 4.6 (Claude Code OAuth)
+       use: deerflow.models.claude_provider:ClaudeChatModel
+       model: claude-sonnet-4-6
+       max_tokens: 4096
+       supports_thinking: true
+   ```
+
+   - Codex CLI lit `~/.codex/auth.json`
+   - L'endpoint Responses de Codex rejette actuellement `max_tokens` et `max_output_tokens`, donc `CodexChatModel` n'expose pas de limite de tokens par requête
+   - Claude Code accepte `CLAUDE_CODE_OAUTH_TOKEN`, `ANTHROPIC_AUTH_TOKEN`, `CLAUDE_CODE_OAUTH_TOKEN_FILE_DESCRIPTOR`, `CLAUDE_CODE_CREDENTIALS_PATH`, ou en clair `~/.claude/.credentials.json`
+   - Sur macOS, DeerFlow ne sonde pas le Keychain automatiquement. Exportez l'auth Claude Code explicitement si nécessaire :
+
+   ```bash
+   eval "$(python3 scripts/export_claude_code_oauth.py --print-export)"
+   ```
+
+4. **Définir les clés API pour le(s) modèle(s) configuré(s)**
+
+   Choisissez l'une des méthodes suivantes :
+
+- Option A : Éditer le fichier `.env` à la racine du projet (recommandé)
+
+
+   ```bash
+   TAVILY_API_KEY=your-tavily-api-key
+   OPENAI_API_KEY=your-openai-api-key
+   # OpenRouter also uses OPENAI_API_KEY when your config uses langchain_openai:ChatOpenAI + base_url.
+   # Add other provider keys as needed
+   INFOQUEST_API_KEY=your-infoquest-api-key
+   ```
+
+- Option B : Exporter les variables d'environnement dans votre shell
+
+   ```bash
+   export OPENAI_API_KEY=your-openai-api-key
+   ```
+
+   Pour les providers basés sur un CLI :
+   - Codex CLI : `~/.codex/auth.json`
+   - Claude Code OAuth : handoff explicite via env/fichier ou `~/.claude/.credentials.json`
+
+- Option C : Éditer `config.yaml` directement (non recommandé en production)
+
+   ```yaml
+   models:
+     - name: gpt-4
+       api_key: your-actual-api-key-here  # Replace placeholder
+   ```
+
+### Lancer l'application
+
+#### Option 1 : Docker (recommandé)
+
+**Développement** (hot-reload, montage des sources) :
+
+```bash
+make docker-init    # Pull sandbox image (only once or when image updates)
+make docker-start   # Start services (auto-detects sandbox mode from config.yaml)
+```
+
+`make docker-start` ne lance `provisioner` que si `config.yaml` utilise le mode provisioner (`sandbox.use: deerflow.community.aio_sandbox:AioSandboxProvider` avec `provisioner_url`).
+Les processus backend récupèrent automatiquement les changements dans `config.yaml` au prochain accès à la configuration, donc les mises à jour de métadonnées des modèles ne nécessitent pas de redémarrage manuel en développement.
+
+> [!TIP]
+> Sous Linux, si les commandes Docker échouent avec `permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock`, ajoutez votre utilisateur au groupe `docker` et reconnectez-vous avant de réessayer. Voir [CONTRIBUTING.md](CONTRIBUTING.md#linux-docker-daemon-permission-denied) pour la solution complète.
+
+**Production** (build des images en local, montage de la config et des données) :
+
+```bash
+make up     # Build images and start all production services
+make down   # Stop and remove containers
+```
+
+> [!NOTE]
+> Le serveur d'agents LangGraph fonctionne actuellement via `langgraph dev` (le serveur CLI open source).
+
+Accès : http://localhost:2026
+
+Voir [CONTRIBUTING.md](CONTRIBUTING.md) pour le guide complet de développement avec Docker.
+
+#### Option 2 : Développement local
+
+Si vous préférez lancer les services en local :
+
+Prérequis : complétez d'abord les étapes de « Configuration » ci-dessus (`make config` et clés API des modèles). `make dev` nécessite un fichier de configuration valide (par défaut `config.yaml` à la racine du projet ; modifiable via `DEER_FLOW_CONFIG_PATH`).
+
+1. **Vérifier les prérequis** :
+   ```bash
+   make check  # Verifies Node.js 22+, pnpm, uv, nginx
+   ```
+
+2. **Installer les dépendances** :
+   ```bash
+   make install  # Install backend + frontend dependencies
+   ```
+
+3. **(Optionnel) Pré-télécharger l'image sandbox** :
+   ```bash
+   # Recommended if using Docker/Container-based sandbox
+   make setup-sandbox
+   ```
+
+4. **Démarrer les services** :
+   ```bash
+   make dev
+   ```
+
+5. **Accès** : http://localhost:2026
+
+### Avancé
+#### Mode Sandbox
+
+DeerFlow supporte plusieurs modes d'exécution sandbox :
+- **Exécution locale** (exécute le code sandbox directement sur la machine hôte)
+- **Exécution Docker** (exécute le code sandbox dans des conteneurs Docker isolés)
+- **Exécution Docker avec Kubernetes** (exécute le code sandbox dans des pods Kubernetes via le service provisioner)
+
+En développement Docker, le démarrage des services suit le mode sandbox défini dans `config.yaml`. En mode Local/Docker, `provisioner` n'est pas démarré.
+
+Voir le [Guide de configuration Sandbox](backend/docs/CONFIGURATION.md#sandbox) pour configurer le mode de votre choix.
+
+#### Serveur MCP
+
+DeerFlow supporte des serveurs MCP et des skills configurables pour étendre ses capacités.
+Pour les serveurs MCP HTTP/SSE, les flux de tokens OAuth sont supportés (`client_credentials`, `refresh_token`).
+Voir le [Guide MCP Server](backend/docs/MCP_SERVER.md) pour les instructions détaillées.
+
+#### Canaux de messagerie
+
+DeerFlow peut recevoir des tâches depuis des applications de messagerie. Les canaux démarrent automatiquement une fois configurés — aucune IP publique n'est requise.
+
+| Canal | Transport | Difficulté |
+|---------|-----------|------------|
+| Telegram | Bot API (long-polling) | Facile |
+| Slack | Socket Mode | Modérée |
+| Feishu / Lark | WebSocket | Modérée |
+
+**Configuration dans `config.yaml` :**
+
+```yaml
+channels:
+  # LangGraph Server URL (default: http://localhost:2024)
+  langgraph_url: http://localhost:2024
+  # Gateway API URL (default: http://localhost:8001)
+  gateway_url: http://localhost:8001
+
+  # Optional: global session defaults for all mobile channels
+  session:
+    assistant_id: lead_agent
+    config:
+      recursion_limit: 100
+    context:
+      thinking_enabled: true
+      is_plan_mode: false
+      subagent_enabled: false
+
+  feishu:
+    enabled: true
+    app_id: $FEISHU_APP_ID
+    app_secret: $FEISHU_APP_SECRET
+    # domain: https://open.feishu.cn       # China (default)
+    # domain: https://open.larksuite.com   # International
+
+  slack:
+    enabled: true
+    bot_token: $SLACK_BOT_TOKEN     # xoxb-...
+    app_token: $SLACK_APP_TOKEN     # xapp-... (Socket Mode)
+    allowed_users: []               # empty = allow all
+
+  telegram:
+    enabled: true
+    bot_token: $TELEGRAM_BOT_TOKEN
+    allowed_users: []               # empty = allow all
+
+    # Optional: per-channel / per-user session settings
+    session:
+      assistant_id: mobile_agent
+      context:
+        thinking_enabled: false
+      users:
+        "123456789":
+          assistant_id: vip_agent
+          config:
+            recursion_limit: 150
+          context:
+            thinking_enabled: true
+            subagent_enabled: true
+```
+
+Définissez les clés API correspondantes dans votre fichier `.env` :
+
+```bash
+# Telegram
+TELEGRAM_BOT_TOKEN=123456789:ABCdefGHIjklMNOpqrSTUvwxYZ
+
+# Slack
+SLACK_BOT_TOKEN=xoxb-...
+SLACK_APP_TOKEN=xapp-...
+
+# Feishu / Lark
+FEISHU_APP_ID=cli_xxxx
+FEISHU_APP_SECRET=your_app_secret
+```
+
+**Configuration Telegram**
+
+1. Ouvrez une conversation avec [@BotFather](https://t.me/BotFather), envoyez `/newbot`, et copiez le token HTTP API.
+2. Définissez `TELEGRAM_BOT_TOKEN` dans `.env` et activez le canal dans `config.yaml`.
+
+**Configuration Slack**
+
+1. Créez une Slack App sur [api.slack.com/apps](https://api.slack.com/apps) → Create New App → From scratch.
+2. Dans **OAuth & Permissions**, ajoutez les Bot Token Scopes : `app_mentions:read`, `chat:write`, `im:history`, `im:read`, `im:write`, `files:write`.
+3. Activez le **Socket Mode** → générez un App-Level Token (`xapp-…`) avec le scope `connections:write`.
+4. Dans **Event Subscriptions**, abonnez-vous aux bot events : `app_mention`, `message.im`.
+5. Définissez `SLACK_BOT_TOKEN` et `SLACK_APP_TOKEN` dans `.env` et activez le canal dans `config.yaml`.
+
+**Configuration Feishu / Lark**
+
+1. Créez une application sur [Feishu Open Platform](https://open.feishu.cn/) → activez la capacité **Bot**.
+2. Ajoutez les permissions : `im:message`, `im:message.p2p_msg:readonly`, `im:resource`.
+3. Dans **Events**, abonnez-vous à `im.message.receive_v1` et sélectionnez le mode **Long Connection**.
+4. Copiez l'App ID et l'App Secret. Définissez `FEISHU_APP_ID` et `FEISHU_APP_SECRET` dans `.env` et activez le canal dans `config.yaml`.
+
+**Commandes**
+
+Une fois un canal connecté, vous pouvez interagir avec DeerFlow directement depuis le chat :
+
+| Commande | Description |
+|---------|-------------|
+| `/new` | Démarrer une nouvelle conversation |
+| `/status` | Afficher les infos du thread en cours |
+| `/models` | Lister les modèles disponibles |
+| `/memory` | Consulter la mémoire |
+| `/help` | Afficher l'aide |
+
+> Les messages sans préfixe de commande sont traités comme du chat classique — DeerFlow crée un thread et répond de manière conversationnelle.
+
+#### Traçage LangSmith
+
+DeerFlow intègre nativement [LangSmith](https://smith.langchain.com) pour l'observabilité. Une fois activé, tous les appels LLM, les exécutions d'agents et les exécutions d'outils sont tracés et visibles dans le tableau de bord LangSmith.
+
+Ajoutez les lignes suivantes à votre fichier `.env` :
+
+```bash
+LANGSMITH_TRACING=true
+LANGSMITH_ENDPOINT=https://api.smith.langchain.com
+LANGSMITH_API_KEY=lsv2_pt_xxxxxxxxxxxxxxxx
+LANGSMITH_PROJECT=xxx
+```
+
+Pour les déploiements Docker, le traçage est désactivé par défaut. Définissez `LANGSMITH_TRACING=true` et `LANGSMITH_API_KEY` dans votre `.env` pour l'activer.
+
+## Du Deep Research au Super Agent Harness
+
+DeerFlow a démarré comme un framework de Deep Research — et la communauté s'en est emparée. Depuis le lancement, les développeurs l'ont poussé bien au-delà de la recherche : construction de pipelines de données, génération de présentations, mise en place de dashboards, automatisation de workflows de contenu. Des usages qu'on n'avait jamais anticipés.
+
+Ça nous a révélé quelque chose d'important : DeerFlow n'était pas qu'un simple outil de recherche. C'était un **harness** — un runtime qui donne aux agents l'infrastructure nécessaire pour vraiment accomplir du travail.
+
+On l'a donc reconstruit de zéro.
+
+DeerFlow 2.0 n'est plus un framework à assembler soi-même. C'est un super agent harness — clé en main et entièrement extensible. Construit sur LangGraph et LangChain, il embarque tout ce dont un agent a besoin out of the box : un système de fichiers, de la mémoire, des skills, une exécution sandboxée, et la capacité de planifier et de lancer des sub-agents pour les tâches complexes et multi-étapes.
+
+Utilisez-le tel quel. Ou démontez-le et faites-en le vôtre.
+
+## Fonctionnalités principales
+
+### Skills et outils
+
+Les skills sont ce qui permet à DeerFlow de faire *pratiquement n'importe quoi*.
+
+Un Agent Skill standard est un module de capacité structuré — un fichier Markdown qui définit un workflow, des bonnes pratiques et des références vers des ressources associées. DeerFlow est livré avec des skills intégrés pour la recherche, la génération de rapports, la création de présentations, les pages web, la génération d'images et de vidéos, et bien plus. Mais la vraie force réside dans l'extensibilité : ajoutez vos propres skills, remplacez ceux fournis, ou combinez-les en workflows composites.
+
+Les skills sont chargés progressivement — uniquement quand la tâche le nécessite, pas tous en même temps. Ça permet de garder la fenêtre de contexte légère et de bien fonctionner même avec des modèles sensibles au nombre de tokens.
+
+Quand vous installez des archives `.skill` via le Gateway, DeerFlow accepte les métadonnées frontmatter optionnelles standard comme `version`, `author` et `compatibility`, plutôt que de rejeter des skills externes par ailleurs valides.
+
+Les outils suivent la même philosophie. DeerFlow est livré avec un ensemble d'outils de base — recherche web, fetch de pages web, opérations sur les fichiers, exécution bash — et supporte les outils custom via des serveurs MCP et des fonctions Python. Remplacez n'importe quoi. Ajoutez n'importe quoi.
+
+Les suggestions de suivi générées par le Gateway normalisent désormais aussi bien la sortie texte brut du modèle que le contenu riche au format bloc/liste avant de parser la réponse en tableau JSON, de sorte que les wrappers de contenu propres à chaque provider ne suppriment plus silencieusement les suggestions.
+
+```
+# Paths inside the sandbox container
+/mnt/skills/public
+├── research/SKILL.md
+├── report-generation/SKILL.md
+├── slide-creation/SKILL.md
+├── web-page/SKILL.md
+└── image-generation/SKILL.md
+
+/mnt/skills/custom
+└── your-custom-skill/SKILL.md      ← yours
+```
+
+#### Intégration Claude Code
+
+Le skill `claude-to-deerflow` vous permet d'interagir avec une instance DeerFlow en cours d'exécution directement depuis [Claude Code](https://docs.anthropic.com/en/docs/claude-code). Envoyez des tâches de recherche, vérifiez le statut, gérez les threads — le tout sans quitter le terminal.
+
+**Installer le skill** :
+
+```bash
+npx skills add https://github.com/bytedance/deer-flow --skill claude-to-deerflow
+```
+
+Assurez-vous ensuite que DeerFlow tourne (par défaut sur `http://localhost:2026`) et utilisez la commande `/claude-to-deerflow` dans Claude Code.
+
+**Ce que vous pouvez faire** :
+- Envoyer des messages à DeerFlow et recevoir des réponses en streaming
+- Choisir le mode d'exécution : flash (rapide), standard, pro (planification), ultra (sub-agents)
+- Vérifier la santé de DeerFlow, lister les modèles/skills/agents
+- Gérer les threads et l'historique des conversations
+- Upload des fichiers pour analyse
+
+**Variables d'environnement** (optionnel, pour des endpoints custom) :
+
+```bash
+DEERFLOW_URL=http://localhost:2026            # Unified proxy base URL
+DEERFLOW_GATEWAY_URL=http://localhost:2026    # Gateway API
+DEERFLOW_LANGGRAPH_URL=http://localhost:2026/api/langgraph  # LangGraph API
+```
+
+Voir [`skills/public/claude-to-deerflow/SKILL.md`](skills/public/claude-to-deerflow/SKILL.md) pour la référence API complète.
+
+### Sub-Agents
+
+Les tâches complexes tiennent rarement en une seule passe. DeerFlow les décompose.
+
+L'agent principal peut lancer des sub-agents à la volée — chacun avec son propre contexte délimité, ses outils et ses conditions d'arrêt. Les sub-agents s'exécutent en parallèle quand c'est possible, remontent des résultats structurés, et l'agent principal synthétise le tout en une sortie cohérente.
+
+C'est comme ça que DeerFlow gère les tâches qui prennent de quelques minutes à plusieurs heures : une tâche de recherche peut se déployer en une dizaine de sub-agents, chacun explorant un angle différent, puis converger vers un seul rapport — ou un site web — ou un jeu de slides avec des visuels générés. Un seul harness, de nombreuses mains.
+
+### Sandbox et système de fichiers
+
+DeerFlow ne se contente pas de *parler* de faire les choses. Il dispose de son propre ordinateur.
+
+Chaque tâche s'exécute dans un conteneur Docker isolé avec un système de fichiers complet — skills, workspace, uploads, outputs. L'agent lit, écrit et édite des fichiers. Il exécute des commandes bash et du code. Il visualise des images. Le tout sandboxé, le tout auditable, zéro contamination entre les sessions.
+
+C'est la différence entre un chatbot avec accès à des outils et un agent doté d'un véritable environnement d'exécution.
+
+```
+# Paths inside the sandbox container
+/mnt/user-data/
+├── uploads/          ← your files
+├── workspace/        ← agents' working directory
+└── outputs/          ← final deliverables
+```
+
+### Context Engineering
+
+**Contexte isolé des Sub-Agents** : chaque sub-agent s'exécute dans son propre contexte isolé. Il ne peut voir ni le contexte de l'agent principal, ni celui des autres sub-agents. L'objectif est de garantir que chaque sub-agent reste concentré sur sa tâche sans être parasité par des informations non pertinentes.
+
+**Résumé** : au sein d'une session, DeerFlow gère le contexte de manière agressive — en résumant les sous-tâches terminées, en déchargeant les résultats intermédiaires vers le système de fichiers, en compressant ce qui n'est plus immédiatement pertinent. Ça lui permet de rester efficace sur des tâches longues et multi-étapes sans faire exploser la fenêtre de contexte.
+
+### Mémoire à long terme
+
+La plupart des agents oublient tout dès qu'une conversation se termine. DeerFlow, lui, se souvient.
+
+D'une session à l'autre, DeerFlow construit une mémoire persistante de votre profil, de vos préférences et de vos connaissances accumulées. Plus vous l'utilisez, mieux il vous connaît — votre style d'écriture, votre stack technique, vos workflows récurrents. La mémoire est stockée localement et reste sous votre contrôle.
+
+Les mises à jour de la mémoire ignorent désormais les entrées de faits en double au moment de l'application, de sorte que les préférences et le contexte répétés ne s'accumulent plus indéfiniment entre les sessions.
+
+## Modèles recommandés
+
+DeerFlow est agnostique en termes de modèle — il fonctionne avec n'importe quel LLM implémentant l'API compatible OpenAI. Cela dit, il offre de meilleures performances avec des modèles qui supportent :
+
+- **De longues fenêtres de contexte** (100k+ tokens) pour la recherche approfondie et les tâches multi-étapes
+- **Des capacités de raisonnement** pour la planification adaptative et la décomposition de tâches complexes
+- **Des entrées multimodales** pour la compréhension d'images et de vidéos
+- **Un usage fiable des outils (tool use)** pour des appels de fonctions et des sorties structurées fiables
+
+## Client Python intégré
+
+DeerFlow peut être utilisé comme bibliothèque Python intégrée sans lancer l'ensemble des services HTTP. Le `DeerFlowClient` fournit un accès direct in-process à toutes les capacités d'agent et de Gateway, en retournant les mêmes schémas de réponse que l'API HTTP Gateway. Le HTTP Gateway expose également `DELETE /api/threads/{thread_id}` pour supprimer les données de thread locales gérées par DeerFlow après la suppression du thread LangGraph :
+
+```python
+from deerflow.client import DeerFlowClient
+
+client = DeerFlowClient()
+
+# Chat
+response = client.chat("Analyze this paper for me", thread_id="my-thread")
+
+# Streaming (LangGraph SSE protocol: values, messages-tuple, end)
+for event in client.stream("hello"):
+    if event.type == "messages-tuple" and event.data.get("type") == "ai":
+        print(event.data["content"])
+
+# Configuration & management — returns Gateway-aligned dicts
+models = client.list_models()        # {"models": [...]}
+skills = client.list_skills()        # {"skills": [...]}
+client.update_skill("web-search", enabled=True)
+client.upload_files("thread-1", ["./report.pdf"])  # {"success": True, "files": [...]}
+```
+
+Toutes les méthodes retournant des dicts sont validées en CI contre les modèles de réponse Pydantic du Gateway (`TestGatewayConformance`), garantissant que le client intégré reste synchronisé avec les schémas de l'API HTTP. Voir `backend/packages/harness/deerflow/client.py` pour la documentation API complète.
+
+## Documentation
+
+- [Guide de contribution](CONTRIBUTING.md) - Mise en place de l'environnement de développement et workflow
+- [Guide de configuration](backend/docs/CONFIGURATION.md) - Instructions d'installation et de configuration
+- [Vue d'ensemble de l'architecture](backend/CLAUDE.md) - Détails de l'architecture technique
+- [Architecture backend](backend/README.md) - Architecture backend et référence API
+
+## ⚠️ Avertissement de sécurité
+
+### Un déploiement inapproprié peut introduire des risques de sécurité
+
+DeerFlow dispose de capacités clés à hauts privilèges, notamment **l'exécution de commandes système, les opérations sur les ressources et l'invocation de logique métier**. Il est conçu par défaut pour être **déployé dans un environnement local de confiance (accessible uniquement via l'interface de loopback 127.0.0.1)**. Si vous déployez l'agent dans des environnements non fiables — tels que des réseaux LAN, des serveurs cloud publics ou d'autres environnements accessibles depuis plusieurs terminaux — sans mesures de sécurité strictes, cela peut introduire des risques, notamment :
+
+- **Invocation non autorisée** : les fonctionnalités de l'agent pourraient être découvertes par des tiers non autorisés ou des scanners malveillants, déclenchant des requêtes non autorisées en masse qui exécutent des opérations à haut risque (commandes système, lecture/écriture de fichiers), pouvant causer de graves conséquences.
+- **Risques juridiques et de conformité** : si l'agent est utilisé illégalement pour mener des cyberattaques, du vol de données ou d'autres activités illicites, cela peut entraîner des responsabilités juridiques et des risques de conformité.
+
+### Recommandations de sécurité
+
+**Note : nous recommandons fortement de déployer DeerFlow dans un environnement réseau local de confiance.** Si vous avez besoin d'un déploiement multi-appareils ou multi-réseaux, vous devez mettre en place des mesures de sécurité strictes, par exemple :
+
+- **Liste blanche d'IP** : utilisez `iptables`, ou déployez des pare-feux matériels / commutateurs avec ACL, pour **configurer des règles de liste blanche d'IP** et refuser l'accès à toutes les autres adresses IP.
+- **Passerelle d'authentification** : configurez un proxy inverse (ex. nginx) et **activez une authentification forte en amont**, bloquant tout accès non authentifié.
+- **Isolation réseau** : si possible, placez l'agent et les appareils de confiance dans le **même VLAN dédié**, isolé des autres équipements réseau.
+- **Restez informé** : continuez à suivre les mises à jour de sécurité du projet DeerFlow.
+
+## Contribuer
+
+Les contributions sont les bienvenues ! Consultez [CONTRIBUTING.md](CONTRIBUTING.md) pour la mise en place de l'environnement de développement, le workflow et les conventions.
+
+La couverture de tests de régression inclut la détection du mode sandbox Docker et les tests de gestion du kubeconfig-path du provisioner dans `backend/tests/`.
+
+## Licence
+
+Ce projet est open source et disponible sous la [Licence MIT](./LICENSE).
+
+## Remerciements
+
+DeerFlow est construit sur le travail remarquable de la communauté open source. Nous sommes profondément reconnaissants envers tous les projets et contributeurs dont les efforts ont rendu DeerFlow possible. Nous nous tenons véritablement sur les épaules de géants.
+
+Nous tenons à exprimer notre sincère gratitude aux projets suivants pour leurs contributions inestimables :
+
+- **[LangChain](https://github.com/langchain-ai/langchain)** : leur excellent framework propulse nos interactions LLM et nos chaînes, permettant une intégration et des fonctionnalités fluides.
+- **[LangGraph](https://github.com/langchain-ai/langgraph)** : leur approche innovante de l'orchestration multi-agents a été déterminante pour les workflows sophistiqués de DeerFlow.
+
+Ces projets illustrent le pouvoir transformateur de la collaboration open source, et nous sommes fiers de bâtir sur leurs fondations.
+
+### Contributeurs principaux
+
+Un grand merci aux auteurs principaux de `DeerFlow`, dont la vision, la passion et le dévouement ont donné vie à ce projet :
+
+- **[Daniel Walnut](https://github.com/hetaoBackend/)**
+- **[Henry Li](https://github.com/magiccube/)**
+
+Votre engagement sans faille et votre expertise sont le moteur du succès de DeerFlow. Nous sommes honorés de vous avoir à la barre de cette aventure.
+
+## Star History
+
+[![Star History Chart](https://api.star-history.com/svg?repos=bytedance/deer-flow&type=Date)](https://star-history.com/#bytedance/deer-flow&Date)

README_pt.md

@@ -1,593 +0,0 @@
-# 🦌 DeerFlow
-
-[![Python 3.12+](https://img.shields.io/badge/python-3.12+-blue.svg)](https://www.python.org/downloads/)
-[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
-[![DeepWiki](https://img.shields.io/badge/DeepWiki-bytedance%2Fdeer--flow-blue.svg?logo=data:image/png;base64,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)](https://deepwiki.com/bytedance/deer-flow)
-
-<!-- DeepWiki badge generated by https://deepwiki.ryoppippi.com/ -->
-
-[English](./README.md) | [简体中文](./README_zh.md) | [日本語](./README_ja.md) | [Deutsch](./README_de.md) | [Español](./README_es.md) | [Русский](./README_ru.md) | [Portuguese](./README_pt.md)
-
-> Originado do Open Source, de volta ao Open Source
-
-**DeerFlow** (**D**eep **E**xploration and **E**fficient **R**esearch **Flow**) é um framework de Pesquisa Profunda orientado-a-comunidade que baseia-se em um íncrivel trabalho da comunidade open source. Nosso objetivo é combinar modelos de linguagem com ferramentas especializadas para tarefas como busca na web, crawling, e execução de código Python, enquanto retribui com a comunidade que o tornou possível.
-
-Atualmente, o DeerFlow entrou oficialmente no Centro de Aplicações FaaS da Volcengine. Os usuários podem experimentá-lo online através do link de experiência para sentir intuitivamente suas funções poderosas e operações convenientes. Ao mesmo tempo, para atender às necessidades de implantação de diferentes usuários, o DeerFlow suporta implantação com um clique baseada na Volcengine. Clique no link de implantação para completar rapidamente o processo de implantação e iniciar uma jornada de pesquisa eficiente.
-
-O DeerFlow recentemente integrou o conjunto de ferramentas de busca e rastreamento inteligente desenvolvido independentemente pela BytePlus — [InfoQuest (oferece experiência gratuita online)](https://docs.byteplus.com/en/docs/InfoQuest/What_is_Info_Quest)
-
-<a href="https://docs.byteplus.com/en/docs/InfoQuest/What_is_Info_Quest" target="_blank">
-  <img 
-    src="https://sf16-sg.tiktokcdn.com/obj/eden-sg/hubseh7bsbps/20251208-160108.png"   alt="infoquest_bannar" 
-  />
-</a>
-
-Por favor, visite [Nosso Site Oficial](https://deerflow.tech/) para maiores detalhes.
-
-## Demo
-
-### Video
-
-<https://github.com/user-attachments/assets/f3786598-1f2a-4d07-919e-8b99dfa1de3e>
-
-Nesse demo, nós demonstramos como usar o DeerFlow para:
-In this demo, we showcase how to use DeerFlow to:
-
-- Integração fácil com serviços MCP
-- Conduzir o processo de Pesquisa Profunda e produzir um relatório abrangente com imagens
-- Criar um áudio podcast baseado no relatório gerado
-
-### Replays
-
-- [Quão alta é a Torre Eiffel comparada ao prédio mais alto?](https://deerflow.tech/chat?replay=eiffel-tower-vs-tallest-building)
-- [Quais são os top repositórios tendência no GitHub?](https://deerflow.tech/chat?replay=github-top-trending-repo)
-- [Escreva um artigo sobre os pratos tradicionais de Nanjing's](https://deerflow.tech/chat?replay=nanjing-traditional-dishes)
-- [Como decorar um apartamento alugado?](https://deerflow.tech/chat?replay=rental-apartment-decoration)
-- [Visite nosso site oficial para explorar mais replays.](https://deerflow.tech/#case-studies)
-
----
-
-## 📑 Tabela de Conteúdos
-
-- [🚀 Início Rápido](#Início-Rápido)
-- [🌟 Funcionalidades](#funcionalidades)
-- [🏗️ Arquitetura](#arquitetura)
-- [🛠️ Desenvolvimento](#desenvolvimento)
-- [🐳 Docker](#docker)
-- [🗣️ Texto-para-fala Integração](#texto-para-fala-integração)
-- [📚 Exemplos](#exemplos)
-- [❓ FAQ](#faq)
-- [📜 Licença](#licença)
-- [💖 Agradecimentos](#agradecimentos)
-- [🏆 Contribuidores-Chave](#contribuidores-chave)
-- [⭐ Histórico de Estrelas](#Histórico-Estrelas)
-
-## Início-Rápido
-
-DeerFlow é desenvolvido em Python, e vem com uma IU web escrita em Node.js. Para garantir um processo de configuração fácil, nós recomendamos o uso das seguintes ferramentas:
-
-### Ferramentas Recomendadas
-
-- **[`uv`](https://docs.astral.sh/uv/getting-started/installation/):**
-  Simplifica o gerenciamento de dependência de ambientes Python. `uv` automaticamente cria um ambiente virtual no diretório raiz e instala todos os pacotes necessários para não haver a necessidade de instalar ambientes Python manualmente
-
-- **[`nvm`](https://github.com/nvm-sh/nvm):**
-  Gerencia múltiplas versões do ambiente de execução do Node.js sem esforço.
-
-- **[`pnpm`](https://pnpm.io/installation):**
-  Instala e gerencia dependências do projeto Node.js.
-
-### Requisitos de Ambiente
-
-Certifique-se de que seu sistema atenda os seguintes requisitos mínimos:
-
-- **[Python](https://www.python.org/downloads/):** Versão `3.12+`
-- **[Node.js](https://nodejs.org/en/download/):** Versão `22+`
-
-### Instalação
-
-```bash
-# Clone o repositório
-git clone https://github.com/bytedance/deer-flow.git
-cd deer-flow
-
-# Instale as dependências, uv irá lidar com o interpretador do python e a criação do venv, e instalar os pacotes necessários
-uv sync
-
-# Configure .env com suas chaves de API
-# Tavily: https://app.tavily.com/home
-# Brave_SEARCH: https://brave.com/search/api/
-# volcengine TTS: Adicione sua credencial TTS caso você a possua
-cp .env.example .env
-
-# Veja as seções abaixo 'Supported Search Engines' and 'Texto-para-Fala Integração' para todas as opções disponíveis
-
-# Configure o conf.yaml para o seu modelo LLM e chaves API
-# Por favor, consulte 'docs/configuration_guide.md' para maiores detalhes
-cp conf.yaml.example conf.yaml
-
-# Instale marp para geração de ppt
-# https://github.com/marp-team/marp-cli?tab=readme-ov-file#use-package-manager
-brew install marp-cli
-```
-
-Opcionalmente, instale as dependências IU web via [pnpm](https://pnpm.io/installation):
-
-```bash
-cd deer-flow/web
-pnpm install
-```
-
-### Configurações
-
-Por favor, consulte o [Guia de Configuração](docs/configuration_guide.md) para maiores detalhes.
-
-> [!NOTA]
-> Antes de iniciar o projeto, leia o guia detalhadamente, e atualize as configurações para baterem com os seus requisitos e configurações específicas.
-
-### Console IU
-
-A maneira mais rápida de rodar o projeto é usar o console IU.
-
-```bash
-# Execute o projeto em um shell tipo-bash
-uv run main.py
-```
-
-### Web IU
-
-Esse projeto também inclui uma IU Web, trazendo uma experiência mais interativa, dinâmica e engajadora.
-
-> [!NOTA]
-> Você precisa instalar as dependências do IU web primeiro.
-
-```bash
-# Execute ambos os servidores de backend e frontend em modo desenvolvimento
-# No macOS/Linux
-./bootstrap.sh -d
-
-# No Windows
-bootstrap.bat -d
-```
-> [!NOTA]
-> Por padrão, o servidor backend se vincula a 127.0.0.1 (localhost) por motivos de segurança. Se você precisar permitir conexões externas (por exemplo, ao implantar em um servidor Linux), poderá modificar o host do servidor para 0.0.0.0 no script de inicialização (uv run server.py --host 0.0.0.0).
-> Certifique-se de que seu ambiente esteja devidamente protegido antes de expor o serviço a redes externas.
-
-Abra seu navegador e visite [`http://localhost:3000`](http://localhost:3000) para explorar a IU web.
-
-Explore mais detalhes no diretório [`web`](./web/) .
-
-## Mecanismos de Busca Suportados
-
-DeerFlow suporta múltiplos mecanismos de busca que podem ser configurados no seu arquivo `.env` usando a variável `SEARCH_API`:
-
-- **Tavily** (padrão): Uma API de busca especializada para aplicações de IA
-
-  - Requer `TAVILY_API_KEY` no seu arquivo `.env`
-  - Inscreva-se em: <https://app.tavily.com/home>
-
-- **InfoQuest** (recomendado): Um conjunto de ferramentas inteligentes de busca e crawling otimizadas para IA, desenvolvido pela BytePlus
-  - Requer `INFOQUEST_API_KEY` no seu arquivo `.env`
-  - Suporte para filtragem por intervalo de tempo e filtragem de sites
-  - Fornece resultados de busca e extração de conteúdo de alta qualidade
-  - Inscreva-se em: <https://console.byteplus.com/infoquest/infoquests>
-  - Visite https://docs.byteplus.com/pt/docs/InfoQuest/What_is_Info_Quest para obter mais informações
-
-- **DuckDuckGo**: Mecanismo de busca focado em privacidade
-
-  - Não requer chave API
-
-- **Brave Search**: Mecanismo de busca focado em privacidade com funcionalidades avançadas
-
-  - Requer `BRAVE_SEARCH_API_KEY` no seu arquivo `.env`
-  - Inscreva-se em: <https://brave.com/search/api/>
-
-- **Arxiv**: Busca de artigos científicos para pesquisa acadêmica
-  - Não requer chave API
-  - Especializado em artigos científicos e acadêmicos
-
-- **Searx/SearxNG**: Mecanismo de metabusca auto-hospedado
-  - Requer `SEARX_HOST` no seu arquivo `.env`
-  - Suporta integração com Searx ou SearxNG
-
-Para configurar o seu mecanismo preferido, defina a variável `SEARCH_API` no seu arquivo:
-
-```bash
-# Escolha uma: tavily, infoquest, duckduckgo, brave_search, arxiv
-SEARCH_API=tavily
-```
-
-### Ferramentas de Crawling
-
-- **Jina** (padrão): Ferramenta gratuita de crawling de conteúdo web acessível
-  - Não é necessária chave API para usar recursos básicos
-  - Ao usar uma chave API, você obtém limites de taxa de acesso mais altos
-  - Visite <https://jina.ai/reader> para obter mais informações
-
-- **InfoQuest** (recomendado): Conjunto de ferramentas inteligentes de busca e crawling otimizadas para IA, desenvolvido pela BytePlus
-  - Requer `INFOQUEST_API_KEY` no seu arquivo `.env`
-  - Fornece parâmetros de crawling configuráveis
-  - Suporta configurações de timeout personalizadas
-  - Oferece capacidades mais poderosas de extração de conteúdo
-  - Visite <https://docs.byteplus.com/pt/docs/InfoQuest/What_is_Info_Quest> para obter mais informações
-
-Para configurar sua ferramenta de crawling preferida, defina o seguinte em seu arquivo `conf.yaml`:
-
-```yaml
-CRAWLER_ENGINE:
-  # Tipo de mecanismo: "jina" (padrão) ou "infoquest"
-  engine: infoquest
-```
-
-## Funcionalidades
-
-### Principais Funcionalidades
-
-- 🤖 **Integração LLM**
-
-  - Suporta a integração da maioria dos modelos através de [litellm](https://docs.litellm.ai/docs/providers).
-  - Suporte a modelos open source como Qwen
-  - Interface API compatível com a OpenAI
-  - Sistema LLM multicamadas para diferentes complexidades de tarefa
-
-### Ferramentas e Integrações MCP
-
-- 🔍 **Busca e Recuperação**
-
-  - Busca web com Tavily, InfoQuest, Brave Search e mais
-  - Crawling com Jina e InfoQuest
-  - Extração de Conteúdo avançada
-
-- 🔗 **Integração MCP perfeita**
-
-  - Expansão de capacidades de acesso para acesso a domínios privados, grafo de conhecimento, navegação web e mais
-  - Integração facilitdade de diversas ferramentas de pesquisa e metodologias
-
-### Colaboração Humana
-
-- 🧠 **Humano-no-processo**
-
-  - Suporta modificação interativa de planos de pesquisa usando linguagem natural
-  - Suporta auto-aceite de planos de pesquisa
-
-- 📝 **Relatório Pós-Edição**
-  - Suporta edição de edição de blocos estilo Notion
-  - Permite refinamentos de IA, incluindo polimento de IA assistida, encurtamento de frase, e expansão
-  - Distribuído por [tiptap](https://tiptap.dev/)
-
-### Criação de Conteúdo
-
-- 🎙️ **Geração de Podcast e apresentação**
-
-  - Script de geração de podcast e síntese de áudio movido por IA
-  - Criação automatizada de apresentações PowerPoint simples
-  - Templates customizáveis para conteúdo personalizado
-
-## Arquitetura
-
-DeerFlow implementa uma arquitetura de sistema multi-agente modular designada para pesquisa e análise de código automatizada. O sistema é construído em LangGraph, possibilitando um fluxo de trabalho flexível baseado-em-estado onde os componentes se comunicam através de um sistema de transmissão de mensagens bem-definido.
-
-![Diagrama de Arquitetura](./assets/architecture.png)
-
-> Veja ao vivo em [deerflow.tech](https://deerflow.tech/#multi-agent-architecture)
-
-O sistema emprega um fluxo de trabalho simplificado com os seguintes componentes:
-
-1. **Coordenador**: O ponto de entrada que gerencia o ciclo de vida do fluxo de trabalho
-
-   - Inicia o processo de pesquisa baseado na entrada do usuário
-   - Delega tarefas so planejador quando apropriado
-   - Atua como a interface primária entre o usuário e o sistema
-
-2. **Planejador**: Componente estratégico para a decomposição e planejamento
-
-   - Analisa objetivos de pesquisa e cria planos de execução estruturados
-   - Determina se há contexto suficiente disponível ou se mais pesquisa é necessária
-   - Gerencia o fluxo de pesquisa e decide quando gerar o relatório final
-
-3. **Time de Pesquisa**: Uma coleção de agentes especializados que executam o plano:
-
-   - **Pesquisador**: Conduz buscas web e coleta informações utilizando ferramentas como mecanismos de busca web, crawling e mesmo serviços MCP.
-   - **Programador**: Lida com a análise de código, execução e tarefas técnicas como usar a ferramenta Python REPL.
-     Cada agente tem acesso à ferramentas específicas otimizadas para seu papel e opera dentro do fluxo de trabalho LangGraph.
-
-4. **Repórter**: Estágio final do processador de estágio para saídas de pesquisa
-   - Resultados agregados do time de pesquisa
-   - Processa e estrutura as informações coletadas
-   - Gera relatórios abrangentes de pesquisas
-
-## Texto-para-Fala Integração
-
-DeerFlow agora inclui uma funcionalidade Texto-para-Fala (TTS) que permite que você converta relatórios de busca para voz. Essa funcionalidade usa o mecanismo de voz da API TTS para gerar áudio de alta qualidade a partir do texto. Funcionalidades como velocidade, volume e tom também são customizáveis.
-
-### Usando a API TTS
-
-Você pode acessar a funcionalidade TTS através do endpoint `/api/tts`:
-
-```bash
-# Exemplo de chamada da API usando curl
-curl --location 'http://localhost:8000/api/tts' \
---header 'Content-Type: application/json' \
---data '{
-    "text": "This is a test of the text-to-speech functionality.",
-    "speed_ratio": 1.0,
-    "volume_ratio": 1.0,
-    "pitch_ratio": 1.0
-}' \
---output speech.mp3
-```
-
-## Desenvolvimento
-
-### Testando
-
-Rode o conjunto de testes:
-
-```bash
-# Roda todos os testes
-make test
-
-# Roda um arquivo de teste específico
-pytest tests/integration/test_workflow.py
-
-# Roda com coverage
-make coverage
-```
-
-### Qualidade de Código
-
-```bash
-# Roda o linting
-make lint
-
-# Formata de código
-make format
-```
-
-### Debugando com o LangGraph Studio
-
-DeerFlow usa LangGraph para sua arquitetura de fluxo de trabalho. Nós podemos usar o LangGraph Studio para debugar e visualizar o fluxo de trabalho em tempo real.
-
-#### Rodando o LangGraph Studio Localmente
-
-DeerFlow inclui um arquivo de configuração `langgraph.json` que define a estrutura do grafo e dependências para o LangGraph Studio. Esse arquivo aponta para o grafo do fluxo de trabalho definido no projeto e automaticamente carrega as variáveis de ambiente do arquivo `.env`.
-
-##### Mac
-
-```bash
-# Instala o gerenciador de pacote uv caso você não o possua
-curl -LsSf https://astral.sh/uv/install.sh | sh
-
-# Instala as dependências e inicia o servidor LangGraph
-uvx --refresh --from "langgraph-cli[inmem]" --with-editable . --python 3.12 langgraph dev --allow-blocking
-```
-
-##### Windows / Linux
-
-```bash
-# Instala as dependências
-pip install -e .
-pip install -U "langgraph-cli[inmem]"
-
-# Inicia o servidor LangGraph
-langgraph dev
-```
-
-Após iniciar o servidor LangGraph, você verá diversas URLs no seu terminal:
-
-- API: <http://127.0.0.1:2024>
-- Studio UI: <https://smith.langchain.com/studio/?baseUrl=http://127.0.0.1:2024>
-- API Docs: <http://127.0.0.1:2024/docs>
-
-Abra o link do Studio UI no seu navegador para acessar a interface de depuração.
-
-#### Usando o LangGraph Studio
-
-No Studio UI, você pode:
-
-1. Visualizar o grafo do fluxo de trabalho e como seus componentes se conectam
-2. Rastrear a execução em tempo-real e ver como os dados fluem através do sistema
-3. Inspecionar o estado de cada passo do fluxo de trabalho
-4. Depurar problemas ao examinar entradas e saídas de cada componente
-5. Coletar feedback durante a fase de planejamento para refinar os planos de pesquisa
-
-Quando você envia um tópico de pesquisa ao Studio UI, você será capaz de ver toda a execução do fluxo de trabalho, incluindo:
-
-- A fase de planejamento onde o plano de pesquisa foi criado
-- O processo de feedback onde você pode modificar o plano
-- As fases de pesquisa e escrita de cada seção
-- A geração do relatório final
-
-## Docker
-
-Você também pode executar esse projeto via Docker.
-
-Primeiro, voce deve ler a [configuração](#configuration) below. Make sure `.env`, `.conf.yaml` files are ready.
-
-Segundo, para fazer o build de sua imagem docker em seu próprio servidor:
-
-```bash
-docker build -t deer-flow-api .
-```
-
-E por fim, inicie um container docker rodando o servidor web:
-
-```bash
-# substitua deer-flow-api-app com seu nome de container preferido
-# Inicie o servidor e faça o bind com localhost:8000
-docker run -d -t -p 127.0.0.1:8000:8000 --env-file .env --name deer-flow-api-app deer-flow-api
-
-# pare o servidor
-docker stop deer-flow-api-app
-```
-
-### Docker Compose (inclui ambos backend e frontend)
-
-DeerFlow fornece uma estrutura docker-compose para facilmente executar ambos o backend e frontend juntos:
-
-```bash
-# building docker image
-docker compose build
-
-# start the server
-docker compose up
-```
-
-> [!WARNING]
-> Se você quiser implantar o DeerFlow em ambientes de produção, adicione autenticação ao site e avalie sua verificação de segurança do MCPServer e Python Repl.
-
-## Exemplos
-
-Os seguintes exemplos demonstram as capacidades do DeerFlow:
-
-### Relatórios de Pesquisa
-
-1. **Relatório OpenAI Sora** - Análise da ferramenta Sora da OpenAI
-
-   - Discute funcionalidades, acesso, engenharia de prompt, limitações e considerações éticas
-
-   - [Veja o relatório completo](examples/openai_sora_report.md)
-
-2. **Relatório Protocolo Agent-to-Agent do Google** - Visão geral do protocolo Agent-to-Agent (A2A) do Google
-
-   - Discute o seu papel na comunicação de Agente de IA e seu relacionamento com o Protocolo de Contexto de Modelo ( MCP ) da Anthropic
-   - [Veja o relatório completo](examples/what_is_agent_to_agent_protocol.md)
-
-3. **O que é MCP?** - Uma análise abrangente to termo "MCP" através de múltiplos contextos
-
-   - Explora o Protocolo de Contexto de Modelo em IA, Fosfato Monocálcio em Química, e placa de microcanal em eletrônica
-   - [Veja o relatório completo](examples/what_is_mcp.md)
-
-4. **Bitcoin Price Fluctuations** - Análise das recentes movimentações de preço do Bitcoin
-
-   - Examina tendências de mercado, influências regulatórias, e indicadores técnicos
-   - Fornece recomendações baseadas nos dados históricos
-   - [Veja o relatório completo](examples/bitcoin_price_fluctuation.md)
-
-5. **O que é LLM?** - Uma exploração em profundidade de Large Language Models
-
-   - Discute arquitetura, treinamento, aplicações, e considerações éticas
-   - [Veja o relatório completo](examples/what_is_llm.md)
-
-6. **Como usar Claude para Pesquisa Aprofundada?** - Melhores práticas e fluxos de trabalho para usar Claude em pesquisa aprofundada
-
-   - Cobre engenharia de prompt, análise de dados, e integração com outras ferramentas
-   - [Veja o relatório completo](examples/how_to_use_claude_deep_research.md)
-
-7. **Adoção de IA na Área da Saúde: Fatores de Influência** - Análise dos fatores que levam à adoção de IA na área da saúde
-
-   - Discute tecnologias de IA, qualidade de dados, considerações éticas, avaliações econômicas, prontidão organizacional, e infraestrutura digital
-   - [Veja o relatório completo](examples/AI_adoption_in_healthcare.md)
-
-8. **Impacto da Computação Quântica em Criptografia** - Análise dos impactos da computação quântica em criptografia
-
-   - Discture vulnerabilidades da criptografia clássica, criptografia pós-quântica, e soluções criptográficas de resistência-quântica
-   - [Veja o relatório completo](examples/Quantum_Computing_Impact_on_Cryptography.md)
-
-9. **Destaques da Performance do Cristiano Ronaldo** - Análise dos destaques da performance do Cristiano Ronaldo
-   - Discute as suas conquistas de carreira, objetivos internacionais, e performance em diversas partidas
-   - [Veja o relatório completo](examples/Cristiano_Ronaldo's_Performance_Highlights.md)
-
-Para executar esses exemplos ou criar seus próprios relatórios de pesquisa, você deve utilizar os seguintes comandos:
-
-```bash
-# Executa com uma consulta específica
-uv run main.py "Quais fatores estão influenciando a adoção de IA na área da saúde?"
-
-# Executa com parâmetros de planejamento customizados
-uv run main.py --max_plan_iterations 3 "Como a computação quântica impacta na criptografia?"
-
-# Executa em modo interativo com questões embutidas
-uv run main.py --interactive
-
-# Ou executa com um prompt interativo básico
-uv run main.py
-
-# Vê todas as opções disponíveis
-uv run main.py --help
-```
-
-### Modo Interativo
-
-A aplicação agora suporta um modo interativo com questões embutidas tanto em Inglês quanto Chinês:
-
-1. Inicie o modo interativo:
-
-   ```bash
-   uv run main.py --interactive
-   ```
-
-2. Selecione sua linguagem de preferência (English or 中文)
-
-3. Escolha uma das questões embutidas da lista ou selecione a opção para perguntar sua própria questão
-
-4. O sistema irá processar sua questão e gerar um relatório abrangente de pesquisa
-
-### Humano no processo
-
-DeerFlow inclue um mecanismo de humano no processo que permite a você revisar, editar e aprovar planos de pesquisa antes que estes sejam executados:
-
-1. **Revisão de Plano**: Quando o humano no processo está habilitado, o sistema irá apresentar o plano de pesquisa gerado para sua revisão antes da execução
-
-2. **Fornecimento de Feedback**: Você pode:
-
-   - Aceitar o plano respondendo com `[ACCEPTED]`
-   - Edite o plano fornecendo feedback (e.g., `[EDIT PLAN] Adicione mais passos sobre a implementação técnica`)
-   - O sistema irá incorporar seu feedback e gerar um plano revisado
-
-3. **Auto-aceite**: Você pode habilitar o auto-aceite ou pular o processo de revisão:
-
-   - Via API: Defina `auto_accepted_plan: true` na sua requisição
-
-4. **Integração de API**: Quanto usar a API, você pode fornecer um feedback através do parâmetro `feedback`:
-
-```json
-   {
-     "messages": [{ "role": "user", "content": "O que é computação quântica?" }],
-     "thread_id": "my_thread_id",
-     "auto_accepted_plan": false,
-     "feedback": "[EDIT PLAN] Inclua mais sobre algoritmos quânticos"
-   }
-   ```
-
-### Argumentos via Linha de Comando
-
-A aplicação suporta diversos argumentos via linha de comando para customizar o seu comportamento:
-
-- **consulta**: A consulta de pesquisa a ser processada (podem ser múltiplas palavras)
-- **--interativo**: Roda no modo interativo com questões embutidas
-- **--max_plan_iterations**: Número máximo de ciclos de planejamento (padrão: 1)
-- **--max_step_num**: Número máximo de passos em um plano de pesquisa (padrão: 3)
-- **--debug**: Habilita Enable um log de depuração detalhado
-
-## FAQ
-
-Por favor consulte a [FAQ.md](docs/FAQ.md) para maiores detalhes.
-
-## Licença
-
-Esse projeto é open source e disponível sob a [MIT License](./LICENSE).
-
-## Agradecimentos
-
-DeerFlow é construído através do incrível trabalho da comunidade open-source. Nós somos profundamente gratos a todos os projetos e contribuidores cujos esforços tornaram o DeerFlow possível. Realmente, nós estamos apoiados nos ombros de gigantes.
-
-Nós gostaríamos de extender nossos sinceros agradecimentos aos seguintes projetos por suas invaloráveis contribuições:
-
-- **[LangChain](https://github.com/langchain-ai/langchain)**: O framework excepcional deles empodera nossas interações via LLM e correntes, permitindo uma integração perfeita e funcional.
-- **[LangGraph](https://github.com/langchain-ai/langgraph)**: A abordagem inovativa para orquestração multi-agente deles tem sido foi fundamental em permitir o acesso dos fluxos de trabalho sofisticados do DeerFlow.
-
-Esses projetos exemplificam o poder transformador da colaboração open-source, e nós temos orgulho de construir baseado em suas fundações.
-
-### Contribuidores-Chave
-
-Um sincero muito obrigado vai para os principais autores do `DeerFlow`, cuja visão, paixão, e dedicação trouxe esse projeto à vida:
-
-- **[Daniel Walnut](https://github.com/hetaoBackend/)**
-- **[Henry Li](https://github.com/magiccube/)**
-
-O seu compromisso inabalável e experiência tem sido a força por trás do sucesso do DeerFlow. Nós estamos honrados em tê-los no comando dessa trajetória.
-
-## Histórico-Estrelas
-
-[![Gráfico do Histórico de Estrelas](https://api.star-history.com/svg?repos=bytedance/deer-flow&type=Date)](https://star-history.com/#bytedance/deer-flow&Date)

README_ru.md

@@ -1,607 +1,490 @@
-# 🦌 DeerFlow
+# 🦌 DeerFlow - 2.0
 
-[![Python 3.12+](https://img.shields.io/badge/python-3.12+-blue.svg)](https://www.python.org/downloads/)
-[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
-[![DeepWiki](https://img.shields.io/badge/DeepWiki-bytedance%2Fdeer--flow-blue.svg?logo=data:image/png;base64,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)](https://deepwiki.com/bytedance/deer-flow)
-<!-- DeepWiki badge generated by https://deepwiki.ryoppippi.com/ -->
+[English](./README.md) | [中文](./README_zh.md) | [日本語](./README_ja.md) | [Français](./README_fr.md) | Русский
 
-[English](./README.md) | [简体中文](./README_zh.md) | [日本語](./README_ja.md) | [Deutsch](./README_de.md) | [Español](./README_es.md) | [Русский](./README_ru.md) | [Portuguese](./README_pt.md)
+[![Python](https://img.shields.io/badge/Python-3.12%2B-3776AB?logo=python&logoColor=white)](./backend/pyproject.toml)
+[![Node.js](https://img.shields.io/badge/Node.js-22%2B-339933?logo=node.js&logoColor=white)](./Makefile)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](./LICENSE)
 
-> Создано на базе открытого кода, возвращено в открытый код.
+<a href="https://trendshift.io/repositories/14699" target="_blank"><img src="https://trendshift.io/api/badge/repositories/14699" alt="bytedance%2Fdeer-flow | Trendshift" style="width: 250px; height: 55px;" width="250" height="55"/></a>
 
-**DeerFlow** (**D**eep **E**xploration and **E**fficient **R**esearch **Flow**) - это фреймворк для глубокого исследования, разработанный сообществом и основанный на впечатляющей работе сообщества открытого кода. Наша цель - объединить языковые модели со специализированными инструментами для таких задач, как веб-поиск, сканирование и выполнение кода Python, одновременно возвращая пользу сообществу, которое сделало это возможным.
+> 28 февраля 2026 года DeerFlow занял 🏆 #1 в GitHub Trending после релиза версии 2. Спасибо огромное нашему сообществу — всё благодаря вам! 💪🔥
 
-В настоящее время DeerFlow официально вошел в Центр приложений FaaS Volcengine. Пользователи могут испытать его онлайн через ссылку для опыта, чтобы интуитивно почувствовать его мощные функции и удобные операции. В то же время, для удовлетворения потребностей развертывания различных пользователей, DeerFlow поддерживает развертывание одним кликом на основе Volcengine. Нажмите на ссылку развертывания, чтобы быстро завершить процесс развертывания и начать эффективное исследовательское путешествие.
+DeerFlow (**D**eep **E**xploration and **E**fficient **R**esearch **Flow**) — open-source **Super Agent Harness**, который управляет **Sub-Agents**, **Memory** и **Sandbox** для решения почти любой задачи. Всё на основе расширяемых **Skills**.
 
-DeerFlow недавно интегрировал интеллектуальный набор инструментов поиска и краулинга, разработанный самостоятельно компанией BytePlus — [InfoQuest (поддерживает бесплатное онлайн-опробование)](https://docs.byteplus.com/en/docs/InfoQuest/What_is_Info_Quest)
+https://github.com/user-attachments/assets/a8bcadc4-e040-4cf2-8fda-dd768b999c18
+
+> [!NOTE]
+> **DeerFlow 2.0 — проект переписан с нуля.** Общего кода с v1 нет. Если нужен оригинальный Deep Research фреймворк — он живёт в ветке [`1.x`](https://github.com/bytedance/deer-flow/tree/main-1.x), туда тоже принимают контрибьюты. Активная разработка идёт в 2.0.
+
+## Официальный сайт
+
+[<img width="2880" height="1600" alt="image" src="https://github.com/user-attachments/assets/a598c49f-3b2f-41ea-a052-05e21349188a" />](https://deerflow.tech)
+
+Больше информации и живые демо на [**официальном сайте**](https://deerflow.tech).
+
+## Coding Plan от ByteDance Volcengine
+
+<img width="4808" height="2400" alt="英文方舟" src="https://github.com/user-attachments/assets/2ecc7b9d-50be-4185-b1f7-5542d222fb2d" />
+
+- Рекомендуем Doubao-Seed-2.0-Code, DeepSeek v3.2 и Kimi 2.5 для запуска DeerFlow
+- [Подробнее](https://www.byteplus.com/en/activity/codingplan?utm_campaign=deer_flow&utm_content=deer_flow&utm_medium=devrel&utm_source=OWO&utm_term=deer_flow)
+- [Для разработчиков из материкового Китая](https://www.volcengine.com/activity/codingplan?utm_campaign=deer_flow&utm_content=deer_flow&utm_medium=devrel&utm_source=OWO&utm_term=deer_flow)
+
+## InfoQuest
+
+DeerFlow интегрирован с инструментарием для умного поиска и краулинга от BytePlus — [InfoQuest (есть бесплатный онлайн-доступ)](https://docs.byteplus.com/en/docs/InfoQuest/What_is_Info_Quest)
 
 <a href="https://docs.byteplus.com/en/docs/InfoQuest/What_is_Info_Quest" target="_blank">
-  <img 
-    src="https://sf16-sg.tiktokcdn.com/obj/eden-sg/hubseh7bsbps/20251208-160108.png"   alt="infoquest_bannar" 
+  <img
+    src="https://sf16-sg.tiktokcdn.com/obj/eden-sg/hubseh7bsbps/20251208-160108.png"
+    alt="InfoQuest_banner"
   />
 </a>
 
-Пожалуйста, посетите [наш официальный сайт](https://deerflow.tech/) для получения дополнительной информации.
-
-## Демонстрация
-
-### Видео
-
-<https://github.com/user-attachments/assets/f3786598-1f2a-4d07-919e-8b99dfa1de3e>
-
-В этой демонстрации мы показываем, как использовать DeerFlow для:
-
-- Бесшовной интеграции с сервисами MCP
-- Проведения процесса глубокого исследования и создания комплексного отчета с изображениями
-- Создания аудио подкаста на основе сгенерированного отчета
-
-### Повторы
-
-- [Какова высота Эйфелевой башни по сравнению с самым высоким зданием?](https://deerflow.tech/chat?replay=eiffel-tower-vs-tallest-building)
-- [Какие репозитории самые популярные на GitHub?](https://deerflow.tech/chat?replay=github-top-trending-repo)
-- [Написать статью о традиционных блюдах Нанкина](https://deerflow.tech/chat?replay=nanjing-traditional-dishes)
-- [Как украсить съемную квартиру?](https://deerflow.tech/chat?replay=rental-apartment-decoration)
-- [Посетите наш официальный сайт, чтобы изучить больше повторов.](https://deerflow.tech/#case-studies)
-
 ---
 
-## 📑 Оглавление
+## Содержание
 
-- [🚀 Быстрый старт](#быстрый-старт)
-- [🌟 Особенности](#особенности)
-- [🏗️ Архитектура](#архитектура)
-- [🛠️ Разработка](#разработка)
-- [🐳 Docker](#docker)
-- [🗣️ Интеграция преобразования текста в речь](#интеграция-преобразования-текста-в-речь)
-- [📚 Примеры](#примеры)
-- [❓ FAQ](#faq)
-- [📜 Лицензия](#лицензия)
-- [💖 Благодарности](#благодарности)
-- [⭐ История звезд](#история-звезд)
+- [🦌 DeerFlow - 2.0](#-deerflow---20)
+  - [Официальный сайт](#официальный-сайт)
+  - [InfoQuest](#infoquest)
+  - [Содержание](#содержание)
+  - [Установка одной фразой для coding agent](#установка-одной-фразой-для-coding-agent)
+  - [Быстрый старт](#быстрый-старт)
+    - [Конфигурация](#конфигурация)
+    - [Запуск](#запуск)
+      - [Вариант 1: Docker (рекомендуется)](#вариант-1-docker-рекомендуется)
+      - [Вариант 2: Локальная разработка](#вариант-2-локальная-разработка)
+    - [Дополнительно](#дополнительно)
+      - [Режим Sandbox](#режим-sandbox)
+      - [MCP-сервер](#mcp-сервер)
+      - [Мессенджеры](#мессенджеры)
+      - [Трассировка LangSmith](#трассировка-langsmith)
+  - [От Deep Research к Super Agent Harness](#от-deep-research-к-super-agent-harness)
+  - [Core Features](#core-features)
+    - [Skills & Tools](#skills--tools)
+      - [Интеграция с Claude Code](#интеграция-с-claude-code)
+    - [Sub-Agents](#sub-agents)
+    - [Sandbox & файловая система](#sandbox--файловая-система)
+    - [Context Engineering](#context-engineering)
+    - [Long-Term Memory](#long-term-memory)
+  - [Рекомендуемые модели](#рекомендуемые-модели)
+  - [Встроенный Python-клиент](#встроенный-python-клиент)
+  - [Документация](#документация)
+  - [⚠️ Безопасность](#️-безопасность)
+  - [Участие в разработке](#участие-в-разработке)
+  - [Лицензия](#лицензия)
+  - [Благодарности](#благодарности)
+    - [Ключевые контрибьюторы](#ключевые-контрибьюторы)
+  - [История звёзд](#история-звёзд)
+
+## Установка одной фразой для coding agent
+
+Если вы используете Claude Code, Codex, Cursor, Windsurf или другой coding agent, просто отправьте ему эту фразу:
+
+```text
+Если DeerFlow еще не клонирован, сначала клонируй его, а затем подготовь локальное окружение разработки по инструкции https://raw.githubusercontent.com/bytedance/deer-flow/main/Install.md
+```
+
+Этот prompt предназначен для coding agent. Он просит агента при необходимости сначала клонировать репозиторий, предпочесть Docker, если он доступен, и в конце вернуть точную команду запуска и список недостающих настроек.
 
 ## Быстрый старт
 
-DeerFlow разработан на Python и поставляется с веб-интерфейсом, написанным на Node.js. Для обеспечения плавного процесса настройки мы рекомендуем использовать следующие инструменты:
+### Конфигурация
 
-### Рекомендуемые инструменты
+1. **Склонировать репозиторий DeerFlow**
 
-- **[`uv`](https://docs.astral.sh/uv/getting-started/installation/):**
-  Упрощает управление средой Python и зависимостями. `uv` автоматически создает виртуальную среду в корневом каталоге и устанавливает все необходимые пакеты за вас—без необходимости вручную устанавливать среды Python.
+   ```bash
+   git clone https://github.com/bytedance/deer-flow.git
+   cd deer-flow
+   ```
 
-- **[`nvm`](https://github.com/nvm-sh/nvm):**
-  Легко управляйте несколькими версиями среды выполнения Node.js.
+2. **Сгенерировать локальные конфиги**
 
-- **[`pnpm`](https://pnpm.io/installation):**
-  Установка и управление зависимостями проекта Node.js.
+   Из корня проекта (`deer-flow/`) запустите:
 
-### Требования к среде
+   ```bash
+   make config
+   ```
 
-Убедитесь, что ваша система соответствует следующим минимальным требованиям:
+   Команда создаёт локальные конфиги на основе шаблонов.
 
-- **[Python](https://www.python.org/downloads/):** Версия `3.12+`
-- **[Node.js](https://nodejs.org/en/download/):** Версия `22+`
+3. **Настроить модель**
 
-### Установка
+   Отредактируйте `config.yaml` и задайте хотя бы одну модель:
+
+   ```yaml
+   models:
+     - name: gpt-4                       # Внутренний идентификатор
+       display_name: GPT-4               # Отображаемое имя
+       use: langchain_openai:ChatOpenAI  # Путь к классу LangChain
+       model: gpt-4                      # Идентификатор модели для API
+       api_key: $OPENAI_API_KEY          # API-ключ (рекомендуется: переменная окружения)
+       max_tokens: 4096                  # Максимальное количество токенов на запрос
+       temperature: 0.7                  # Температура сэмплирования
+
+     - name: openrouter-gemini-2.5-flash
+       display_name: Gemini 2.5 Flash (OpenRouter)
+       use: langchain_openai:ChatOpenAI
+       model: google/gemini-2.5-flash-preview
+       api_key: $OPENAI_API_KEY
+       base_url: https://openrouter.ai/api/v1
+
+     - name: gpt-5-responses
+       display_name: GPT-5 (Responses API)
+       use: langchain_openai:ChatOpenAI
+       model: gpt-5
+       api_key: $OPENAI_API_KEY
+       use_responses_api: true
+       output_version: responses/v1
+   ```
+
+   OpenRouter и аналогичные OpenAI-совместимые шлюзы настраиваются через `langchain_openai:ChatOpenAI` с параметром `base_url`. Для CLI-провайдеров:
+
+   ```yaml
+   models:
+     - name: gpt-5.4
+       display_name: GPT-5.4 (Codex CLI)
+       use: deerflow.models.openai_codex_provider:CodexChatModel
+       model: gpt-5.4
+       supports_thinking: true
+       supports_reasoning_effort: true
+
+     - name: claude-sonnet-4.6
+       display_name: Claude Sonnet 4.6 (Claude Code OAuth)
+       use: deerflow.models.claude_provider:ClaudeChatModel
+       model: claude-sonnet-4-6
+       max_tokens: 4096
+       supports_thinking: true
+   ```
+
+   - Codex CLI читает `~/.codex/auth.json`
+   - Claude Code принимает `CLAUDE_CODE_OAUTH_TOKEN`, `ANTHROPIC_AUTH_TOKEN` или `~/.claude/.credentials.json`
+   - На macOS при необходимости экспортируйте аутентификацию Claude Code явно:
+
+   ```bash
+   eval "$(python3 scripts/export_claude_code_oauth.py --print-export)"
+   ```
+
+4. **Указать API-ключи**
+
+   - **Вариант А**: файл `.env` в корне проекта (рекомендуется)
+
+   ```bash
+   TAVILY_API_KEY=your-tavily-api-key
+   OPENAI_API_KEY=your-openai-api-key
+   INFOQUEST_API_KEY=your-infoquest-api-key
+   ```
+
+   - **Вариант Б**: переменные окружения в терминале
+
+   ```bash
+   export OPENAI_API_KEY=your-openai-api-key
+   ```
+
+   - **Вариант В**: напрямую в `config.yaml` (не рекомендуется для продакшена)
+
+### Запуск
+
+#### Вариант 1: Docker (рекомендуется)
+
+**Разработка** (hot-reload, монтирование исходников):
 
 ```bash
-# Клонировать репозиторий
-git clone https://github.com/bytedance/deer-flow.git
-cd deer-flow
-
-# Установить зависимости, uv позаботится об интерпретаторе python и создании venv, и установит необходимые пакеты
-uv sync
-
-# Настроить .env с вашими API-ключами
-# Tavily: https://app.tavily.com/home
-# Brave_SEARCH: https://brave.com/search/api/
-# volcengine TTS: Добавьте ваши учетные данные TTS, если они у вас есть
-cp .env.example .env
-
-# См. разделы 'Поддерживаемые поисковые системы' и 'Интеграция преобразования текста в речь' ниже для всех доступных опций
-
-# Настроить conf.yaml для вашей модели LLM и API-ключей
-# Пожалуйста, обратитесь к 'docs/configuration_guide.md' для получения дополнительной информации
-cp conf.yaml.example conf.yaml
-
-# Установить marp для генерации презентаций
-# https://github.com/marp-team/marp-cli?tab=readme-ov-file#use-package-manager
-brew install marp-cli
+make docker-init    # Загрузить образ Sandbox (один раз или при обновлении)
+make docker-start   # Запустить сервисы
 ```
 
-По желанию установите зависимости веб-интерфейса через [pnpm](https://pnpm.io/installation):
+**Продакшен** (собирает образы локально):
 
 ```bash
-cd deer-flow/web
-pnpm install
+make up     # Собрать образы и запустить все сервисы
+make down   # Остановить и удалить контейнеры
 ```
 
-### Конфигурации
+> [!TIP]
+> На Linux при ошибке `permission denied` для Docker daemon добавьте пользователя в группу `docker` и перелогиньтесь. Подробнее в [CONTRIBUTING.md](CONTRIBUTING.md#linux-docker-daemon-permission-denied).
 
-Пожалуйста, обратитесь к [Руководству по конфигурации](docs/configuration_guide.md) для получения дополнительной информации.
+Адрес: http://localhost:2026
 
-> [!ПРИМЕЧАНИЕ]
-> Прежде чем запустить проект, внимательно прочитайте руководство и обновите конфигурации в соответствии с вашими конкретными настройками и требованиями.
+#### Вариант 2: Локальная разработка
 
-### Консольный интерфейс
+1. **Проверить зависимости**:
+   ```bash
+   make check  # Проверяет Node.js 22+, pnpm, uv, nginx
+   ```
 
-Самый быстрый способ запустить проект - использовать консольный интерфейс.
+2. **Установить зависимости**:
+   ```bash
+   make install
+   ```
 
-```bash
-# Запустить проект в оболочке, похожей на bash
-uv run main.py
-```
+3. **(Опционально) Загрузить образ Sandbox заранее**:
+   ```bash
+   make setup-sandbox
+   ```
 
-### Веб-интерфейс
+4. **Запустить сервисы**:
+   ```bash
+   make dev
+   ```
 
-Этот проект также включает веб-интерфейс, предлагающий более динамичный и привлекательный интерактивный опыт.
+5. **Адрес**: http://localhost:2026
 
-> [!ПРИМЕЧАНИЕ]
-> Сначала вам нужно установить зависимости веб-интерфейса.
+### Дополнительно
 
-```bash
-# Запустить оба сервера, бэкенд и фронтенд, в режиме разработки
-# На macOS/Linux
-./bootstrap.sh -d
+#### Режим Sandbox
 
-# На Windows
-bootstrap.bat -d
-```
-> [!Примечание]
-> По умолчанию сервер бэкенда привязывается к 127.0.0.1 (localhost) по соображениям безопасности. Если вам нужно разрешить внешние подключения (например, при развертывании на сервере Linux), вы можете изменить хост сервера на 0.0.0.0 в скрипте загрузки (uv run server.py --host 0.0.0.0).
-> Пожалуйста, убедитесь, что ваша среда должным образом защищена, прежде чем подвергать сервис внешним сетям.
+DeerFlow поддерживает несколько режимов выполнения:
+- **Локальное выполнение** — код запускается прямо на хосте
+- **Docker** — код выполняется в изолированных Docker-контейнерах
+- **Docker + Kubernetes** — выполнение в Kubernetes-подах через provisioner
 
-Откройте ваш браузер и посетите [`http://localhost:3000`](http://localhost:3000), чтобы исследовать веб-интерфейс.
+Подробнее в [руководстве по конфигурации Sandbox](backend/docs/CONFIGURATION.md#sandbox).
 
-Исследуйте больше деталей в каталоге [`web`](./web/).
+#### MCP-сервер
 
-## Поддерживаемые поисковые системы
+DeerFlow поддерживает настраиваемые MCP-серверы для расширения возможностей. Для HTTP/SSE MCP-серверов поддерживаются OAuth-токены (`client_credentials`, `refresh_token`). Подробнее в [руководстве по MCP-серверу](backend/docs/MCP_SERVER.md).
 
-DeerFlow поддерживает несколько поисковых систем, которые можно настроить в файле `.env` с помощью переменной `SEARCH_API`:
+#### Мессенджеры
 
-- **Tavily** (по умолчанию): Специализированный поисковый API для приложений ИИ
+DeerFlow принимает задачи прямо из мессенджеров. Каналы запускаются автоматически при настройке, публичный IP не нужен.
 
-  - Требуется `TAVILY_API_KEY` в вашем файле `.env`
-  - Зарегистрируйтесь на: <https://app.tavily.com/home>
+| Канал | Транспорт | Сложность |
+|-------|-----------|-----------|
+| Telegram | Bot API (long-polling) | Просто |
+| Slack | Socket Mode | Средне |
+| Feishu / Lark | WebSocket | Средне |
 
-- **InfoQuest** (рекомендуется): Набор интеллектуальных инструментов для поиска и сканирования, оптимизированных для ИИ, разработанный компанией BytePlus
-  - Требуется `INFOQUEST_API_KEY` в вашем файле `.env`
-  - Поддержка фильтрации по диапазону времени и фильтрации сайтов
-  - Предоставляет высококачественные результаты поиска и извлечение контента
-  - Зарегистрируйтесь на: <https://console.byteplus.com/infoquest/infoquests>
-  - Посетите https://docs.byteplus.com/ru/docs/InfoQuest/What_is_Info_Quest для получения дополнительной информации
-
-- **DuckDuckGo**: Поисковая система, ориентированная на конфиденциальность
-
-  - Не требуется API-ключ
-
-- **Brave Search**: Поисковая система, ориентированная на конфиденциальность, с расширенными функциями
-
-  - Требуется `BRAVE_SEARCH_API_KEY` в вашем файле `.env`
-  - Зарегистрируйтесь на: <https://brave.com/search/api/>
-
-- **Arxiv**: Поиск научных статей для академических исследований
-  - Не требуется API-ключ
-  - Специализируется на научных и академических статьях
-
-- **Searx/SearxNG**: Самостоятельно размещённая метапоисковая система
-  - Требуется `SEARX_HOST` в вашем файле `.env`
-  - Поддерживает подключение к Searx или SearxNG
-
-Чтобы настроить предпочитаемую поисковую систему, установите переменную `SEARCH_API` в вашем файле `.env`:
-
-```bash
-# Выберите одно: tavily, infoquest, duckduckgo, brave_search, arxiv
-SEARCH_API=tavily
-```
-
-### Инструменты сканирования
-
-- **Jina** (по умолчанию): Бесплатный доступный инструмент для сканирования веб-контента
-  - API-ключ не требуется для использования базовых функций
-  - При использовании API-ключа вы получаете более высокие лимиты скорости доступа
-  - Посетите <https://jina.ai/reader> для получения дополнительной информации
-
-- **InfoQuest** (рекомендуется): Набор интеллектуальных инструментов для поиска и сканирования, оптимизированных для ИИ, разработанный компанией BytePlus
-  - Требуется `INFOQUEST_API_KEY` в вашем файле `.env`
-  - Предоставляет настраиваемые параметры сканирования
-  - Поддерживает настройки пользовательских тайм-аутов
-  - Предоставляет более мощные возможности извлечения контента
-  - Посетите <https://docs.byteplus.com/ru/docs/InfoQuest/What_is_Info_Quest> для получения дополнительной информации
-
-Чтобы настроить предпочитаемый инструмент сканирования, установите следующее в вашем файле `conf.yaml`:
+**Конфигурация в `config.yaml`:**
 
 ```yaml
-CRAWLER_ENGINE:
-  # Тип движка: "jina" (по умолчанию) или "infoquest"
-  engine: infoquest
+channels:
+  feishu:
+    enabled: true
+    app_id: $FEISHU_APP_ID
+    app_secret: $FEISHU_APP_SECRET
+    # domain: https://open.feishu.cn       # China (default)
+    # domain: https://open.larksuite.com   # International
+
+  slack:
+    enabled: true
+    bot_token: $SLACK_BOT_TOKEN
+    app_token: $SLACK_APP_TOKEN
+    allowed_users: []
+
+  telegram:
+    enabled: true
+    bot_token: $TELEGRAM_BOT_TOKEN
+    allowed_users: []
 ```
 
-## Особенности
+**Настройка Telegram**
 
-### Ключевые возможности
+1. Напишите [@BotFather](https://t.me/BotFather), отправьте `/newbot` и скопируйте HTTP API-токен.
+2. Укажите `TELEGRAM_BOT_TOKEN` в `.env` и включите канал в `config.yaml`.
 
-- 🤖 **Интеграция LLM**
-  - Поддерживает интеграцию большинства моделей через [litellm](https://docs.litellm.ai/docs/providers).
-  - Поддержка моделей с открытым исходным кодом, таких как Qwen
-  - API-интерфейс, совместимый с OpenAI
-  - Многоуровневая система LLM для задач различной сложности
+**Доступные команды**
 
-### Инструменты и интеграции MCP
+| Команда | Описание |
+|---------|----------|
+| `/new` | Начать новый диалог |
+| `/status` | Показать информацию о текущем треде |
+| `/models` | Список доступных моделей |
+| `/memory` | Просмотреть память |
+| `/help` | Показать справку |
 
-- 🔍 **Поиск и извлечение**
+> Сообщения без команды воспринимаются как обычный чат — DeerFlow создаёт тред и отвечает.
 
-  - Веб-поиск через Tavily, InfoQuest, Brave Search и другие
-  - Сканирование с Jina и InfoQuest
-  - Расширенное извлечение контента
+#### Трассировка LangSmith
 
-- 🔗 **Бесшовная интеграция MCP**
-  - Расширение возможностей для доступа к частным доменам, графам знаний, веб-браузингу и многому другому
-  - Облегчает интеграцию различных исследовательских инструментов и методологий
+DeerFlow имеет встроенную интеграцию с [LangSmith](https://smith.langchain.com) для наблюдаемости. При включении все вызовы LLM, запуски агентов и выполнения инструментов отслеживаются и отображаются в дашборде LangSmith.
 
-### Человеческое взаимодействие
-
-- 🧠 **Человек в контуре**
-
-  - Поддерживает интерактивное изменение планов исследования с использованием естественного языка
-  - Поддерживает автоматическое принятие планов исследования
-
-- 📝 **Пост-редактирование отчетов**
-  - Поддерживает блочное редактирование в стиле Notion
-  - Позволяет совершенствовать с помощью ИИ, включая полировку, сокращение и расширение предложений
-  - Работает на [tiptap](https://tiptap.dev/)
-
-### Создание контента
-
-- 🎙️ **Генерация подкастов и презентаций**
-  - Генерация сценариев подкастов и синтез аудио с помощью ИИ
-  - Автоматическое создание простых презентаций PowerPoint
-  - Настраиваемые шаблоны для индивидуального контента
-
-## Архитектура
-
-DeerFlow реализует модульную архитектуру системы с несколькими агентами, предназначенную для автоматизированных исследований и анализа кода. Система построена на LangGraph, обеспечивающей гибкий рабочий процесс на основе состояний, где компоненты взаимодействуют через четко определенную систему передачи сообщений.
-
-![Диаграмма архитектуры](./assets/architecture.png)
-
-> Посмотрите вживую на [deerflow.tech](https://deerflow.tech/#multi-agent-architecture)
-
-В системе используется оптимизированный рабочий процесс со следующими компонентами:
-
-1. **Координатор**: Точка входа, управляющая жизненным циклом рабочего процесса
-
-   - Инициирует процесс исследования на основе пользовательского ввода
-   - Делегирует задачи планировщику, когда это необходимо
-   - Выступает в качестве основного интерфейса между пользователем и системой
-
-2. **Планировщик**: Стратегический компонент для декомпозиции и планирования задач
-
-   - Анализирует цели исследования и создает структурированные планы выполнения
-   - Определяет, достаточно ли доступного контекста или требуется дополнительное исследование
-   - Управляет потоком исследования и решает, когда генерировать итоговый отчет
-
-3. **Исследовательская команда**: Набор специализированных агентов, которые выполняют план:
-
-   - **Исследователь**: Проводит веб-поиск и сбор информации с использованием таких инструментов, как поисковые системы, сканирование и даже сервисы MCP.
-   - **Программист**: Обрабатывает анализ кода, выполнение и технические задачи с помощью инструмента Python REPL.
-     Каждый агент имеет доступ к определенным инструментам, оптимизированным для его роли, и работает в рамках фреймворка LangGraph
-
-4. **Репортер**: Процессор финальной стадии для результатов исследования
-   - Агрегирует находки исследовательской команды
-   - Обрабатывает и структурирует собранную информацию
-   - Генерирует комплексные исследовательские отчеты
-
-## Интеграция преобразования текста в речь
-
-DeerFlow теперь включает функцию преобразования текста в речь (TTS), которая позволяет конвертировать исследовательские отчеты в речь. Эта функция использует API TTS volcengine для генерации высококачественного аудио из текста. Также можно настраивать такие параметры, как скорость, громкость и тон.
-
-### Использование API TTS
-
-Вы можете получить доступ к функциональности TTS через конечную точку `/api/tts`:
+Добавьте в файл `.env` в корне проекта:
 
 ```bash
-# Пример вызова API с использованием curl
-curl --location 'http://localhost:8000/api/tts' \
---header 'Content-Type: application/json' \
---data '{
-    "text": "Это тест функциональности преобразования текста в речь.",
-    "speed_ratio": 1.0,
-    "volume_ratio": 1.0,
-    "pitch_ratio": 1.0
-}' \
---output speech.mp3
+LANGSMITH_TRACING=true
+LANGSMITH_API_KEY=lsv2_pt_xxxxxxxxxxxxxxxx
+LANGSMITH_PROJECT=deer-flow
 ```
 
-## Разработка
+`LANGSMITH_ENDPOINT` по умолчанию `https://api.smith.langchain.com` и может быть переопределён при необходимости. Устаревшие переменные `LANGCHAIN_*` (`LANGCHAIN_TRACING_V2`, `LANGCHAIN_API_KEY` и т.д.) также поддерживаются для обратной совместимости; `LANGSMITH_*` имеет приоритет, когда заданы обе.
 
-### Тестирование
+В Docker-развёртываниях трассировка отключена по умолчанию. Установите `LANGSMITH_TRACING=true` и `LANGSMITH_API_KEY` в `.env` для включения.
 
-Запустите набор тестов:
+## От Deep Research к Super Agent Harness
+
+DeerFlow начинался как фреймворк для Deep Research, и сообщество вышло далеко за эти рамки. После запуска разработчики строили пайплайны, генерировали презентации, поднимали дашборды, автоматизировали контент. То, чего мы не ожидали.
+
+Стало понятно: DeerFlow не просто research-инструмент. Это **harness**: runtime, который даёт агентам необходимую инфраструктуру.
+
+Поэтому мы переписали всё с нуля.
+
+DeerFlow 2.0 — это Super Agent Harness «из коробки». Batteries included, полностью расширяемый. Построен на LangGraph и LangChain. По умолчанию есть всё, что нужно агенту: файловая система, memory, skills, sandbox-выполнение и возможность планировать и запускать sub-agents для сложных многошаговых задач.
+
+Используйте как есть. Или разберите и переделайте под себя.
+
+## Core Features
+
+### Skills & Tools
+
+Skills — это то, что позволяет DeerFlow делать почти что угодно.
+
+Agent Skill — это структурированный модуль: Markdown-файл с описанием воркфлоу, лучших практик и ссылок на ресурсы. DeerFlow поставляется со встроенными skills для ресёрча, генерации отчётов, слайдов, веб-страниц, изображений и видео. Но главное — расширяемость: добавляйте свои skills, заменяйте встроенные или собирайте из них составные воркфлоу.
+
+Skills загружаются по мере необходимости, только когда задача их требует. Это держит контекстное окно чистым.
+
+```
+# Пути внутри контейнера sandbox
+/mnt/skills/public
+├── research/SKILL.md
+├── report-generation/SKILL.md
+├── slide-creation/SKILL.md
+├── web-page/SKILL.md
+└── image-generation/SKILL.md
+
+/mnt/skills/custom
+└── your-custom-skill/SKILL.md      ← ваш skill
+```
+
+#### Интеграция с Claude Code
+
+Skill `claude-to-deerflow` позволяет работать с DeerFlow прямо из [Claude Code](https://docs.anthropic.com/en/docs/claude-code). Отправляйте задачи, проверяйте статус, управляйте тредами, не выходя из терминала.
+
+**Установка скилла**:
 
 ```bash
-# Запустить все тесты
-make test
-
-# Запустить определенный тестовый файл
-pytest tests/integration/test_workflow.py
-
-# Запустить с покрытием
-make coverage
+npx skills add https://github.com/bytedance/deer-flow --skill claude-to-deerflow
 ```
 
-### Качество кода
+**Что можно делать**:
+- Отправлять сообщения в DeerFlow и получать потоковые ответы
+- Выбирать режимы выполнения: flash (быстро), standard, pro (planning), ultra (sub-agents)
+- Проверять статус DeerFlow, просматривать модели, скиллы, агентов
+- Управлять тредами и историей диалога
+- Загружать файлы для анализа
 
-```bash
-# Запустить линтинг
-make lint
+Полный справочник API в [`skills/public/claude-to-deerflow/SKILL.md`](skills/public/claude-to-deerflow/SKILL.md).
 
-# Форматировать код
-make format
+### Sub-Agents
+
+Сложные задачи редко решаются за один проход. DeerFlow их декомпозирует.
+
+Lead agent запускает sub-agents на лету, каждый со своим изолированным контекстом, инструментами и условиями завершения. Sub-agents работают параллельно, возвращают структурированные результаты, а lead agent собирает всё в единый итог.
+
+Вот как DeerFlow справляется с задачами на минуты и часы: research-задача разветвляется в дюжину sub-agents, каждый копает свой угол, потом всё сходится в один отчёт, или сайт, или слайддек со сгенерированными визуалами. Один harness, много рук.
+
+### Sandbox & файловая система
+
+DeerFlow не просто *говорит* о том, что умеет что-то делать. У него есть собственный компьютер.
+
+Каждая задача выполняется внутри изолированного Docker-контейнера с полной файловой системой: skills, workspace, uploads, outputs. Агент читает, пишет и редактирует файлы. Выполняет bash-команды и пишет код. Смотрит на изображения. Всё изолировано, всё прозрачно, никакого пересечения между сессиями.
+
+Это разница между чатботом с доступом к инструментам и агентом с реальной средой выполнения.
+
+```
+# Пути внутри контейнера sandbox
+/mnt/user-data/
+├── uploads/          ← ваши файлы
+├── workspace/        ← рабочая директория агентов
+└── outputs/          ← результаты
 ```
 
-### Отладка с LangGraph Studio
+### Context Engineering
 
-DeerFlow использует LangGraph для своей архитектуры рабочего процесса. Вы можете использовать LangGraph Studio для отладки и визуализации рабочего процесса в реальном времени.
+**Изолированный контекст**: каждый sub-agent работает в своём контексте и не видит контекст главного агента или других sub-agents. Агент фокусируется на своей задаче.
 
-#### Запуск LangGraph Studio локально
+**Управление контекстом**: внутри сессии DeerFlow агрессивно сжимает контекст и суммирует завершённые подзадачи, выгружает промежуточные результаты в файловую систему, сжимает то, что уже не актуально. На длинных многошаговых задачах контекстное окно не переполняется.
 
-DeerFlow включает конфигурационный файл `langgraph.json`, который определяет структуру графа и зависимости для LangGraph Studio. Этот файл указывает на графы рабочего процесса, определенные в проекте, и автоматически загружает переменные окружения из файла `.env`.
+### Long-Term Memory
 
-##### Mac
+Большинство агентов забывают всё, когда диалог заканчивается. DeerFlow помнит.
 
-```bash
-# Установите менеджер пакетов uv, если у вас его нет
-curl -LsSf https://astral.sh/uv/install.sh | sh
+DeerFlow сохраняет ваш профиль, предпочтения и накопленные знания между сессиями. Чем больше используете, тем лучше он вас знает: стиль, технологический стек, повторяющиеся воркфлоу. Всё хранится локально и остаётся под вашим контролем.
 
-# Установите зависимости и запустите сервер LangGraph
-uvx --refresh --from "langgraph-cli[inmem]" --with-editable . --python 3.12 langgraph dev --allow-blocking
+## Рекомендуемые модели
+
+DeerFlow работает с любым LLM через OpenAI-совместимый API. Лучше всего — с моделями, которые поддерживают:
+
+- **Большое контекстное окно** (100k+ токенов) — для deep research и многошаговых задач
+- **Reasoning capabilities** — для адаптивного планирования и сложной декомпозиции
+- **Multimodal inputs** — для работы с изображениями и видео
+- **Strong tool-use** — для надёжного вызова функций и структурированных ответов
+
+## Встроенный Python-клиент
+
+DeerFlow можно использовать как Python-библиотеку прямо в коде — без запуска HTTP-сервисов. `DeerFlowClient` даёт доступ ко всем возможностям агента и Gateway, возвращает те же схемы ответов, что и HTTP Gateway API:
+
+```python
+from deerflow.client import DeerFlowClient
+
+client = DeerFlowClient()
+
+# Chat
+response = client.chat("Analyze this paper for me", thread_id="my-thread")
+
+# Streaming (LangGraph SSE protocol: values, messages-tuple, end)
+for event in client.stream("hello"):
+    if event.type == "messages-tuple" and event.data.get("type") == "ai":
+        print(event.data["content"])
+
+# Configuration & management — returns Gateway-aligned dicts
+models = client.list_models()        # {"models": [...]}
+skills = client.list_skills()        # {"skills": [...]}
+client.update_skill("web-search", enabled=True)
+client.upload_files("thread-1", ["./report.pdf"])  # {"success": True, "files": [...]}
 ```
 
-##### Windows / Linux
+## Документация
 
-```bash
-# Установить зависимости
-pip install -e .
-pip install -U "langgraph-cli[inmem]"
+- [Руководство по участию](CONTRIBUTING.md) — настройка среды разработки, воркфлоу и гайдлайны
+- [Руководство по конфигурации](backend/docs/CONFIGURATION.md) — инструкции по настройке
+- [Обзор архитектуры](backend/CLAUDE.md) — технические детали
+- [Архитектура бэкенда](backend/README.md) — бэкенд и справочник API
 
-# Запустить сервер LangGraph
-langgraph dev
-```
+## ⚠️ Безопасность
 
-После запуска сервера LangGraph вы увидите несколько URL в терминале:
+### Неправильное развёртывание может привести к угрозам безопасности
 
-- API: <http://127.0.0.1:2024>
-- Studio UI: <https://smith.langchain.com/studio/?baseUrl=http://127.0.0.1:2024>
-- API Docs: <http://127.0.0.1:2024/docs>
+DeerFlow обладает ключевыми высокопривилегированными возможностями, включая **выполнение системных команд, операции с ресурсами и вызов бизнес-логики**. По умолчанию он рассчитан на **развёртывание в локальной доверенной среде (доступ только через loopback-адрес 127.0.0.1)**. Если вы разворачиваете агент в недоверенных средах — локальных сетях, публичных облачных серверах или других окружениях, доступных с нескольких устройств — без строгих мер безопасности, это может привести к следующим угрозам:
 
-Откройте ссылку Studio UI в вашем браузере для доступа к интерфейсу отладки.
+- **Несанкционированные вызовы**: функциональность агента может быть обнаружена неавторизованными третьими лицами или вредоносными сканерами, что приведёт к массовым несанкционированным запросам с выполнением высокорисковых операций (системные команды, чтение/запись файлов) и серьёзным последствиям для безопасности.
+- **Юридические и compliance-риски**: если агент будет незаконно использован для кибератак, кражи данных или других противоправных действий, это может повлечь юридическую ответственность и compliance-риски.
 
-#### Использование LangGraph Studio
+### Рекомендации по безопасности
 
-В интерфейсе Studio вы можете:
+**Примечание: настоятельно рекомендуем развёртывать DeerFlow только в локальной доверенной сети.** Если вам необходимо развёртывание через несколько устройств или сетей, обязательно реализуйте строгие меры безопасности, например:
 
-1. Визуализировать граф рабочего процесса и видеть, как соединяются компоненты
-2. Отслеживать выполнение в реальном времени, чтобы видеть, как данные проходят через систему
-3. Исследовать состояние на каждом шаге рабочего процесса
-4. Отлаживать проблемы путем изучения входов и выходов каждого компонента
-5. Предоставлять обратную связь во время фазы планирования для уточнения планов исследования
+- **Белый список IP-адресов**: используйте `iptables` или аппаратные межсетевые экраны / коммутаторы с ACL, чтобы **настроить правила белого списка IP** и заблокировать доступ со всех остальных адресов.
+- **Шлюз аутентификации**: настройте обратный прокси (nginx и др.) и **включите строгую предварительную аутентификацию**, запрещающую любой доступ без авторизации.
+- **Сетевая изоляция**: по возможности разместите агент и доверенные устройства в **одном выделенном VLAN**, изолированном от остальной сети.
+- **Следите за обновлениями**: регулярно отслеживайте обновления безопасности проекта DeerFlow.
 
-Когда вы отправляете тему исследования в интерфейсе Studio, вы сможете увидеть весь процесс выполнения рабочего процесса, включая:
+## Участие в разработке
 
-- Фазу планирования, где создается план исследования
-- Цикл обратной связи, где вы можете модифицировать план
-- Фазы исследования и написания для каждого раздела
-- Генерацию итогового отчета
-
-### Включение трассировки LangSmith
-
-DeerFlow поддерживает трассировку LangSmith, чтобы помочь вам отладить и контролировать ваши рабочие процессы. Чтобы включить трассировку LangSmith:
-
-1. Убедитесь, что в вашем файле `.env` есть следующие конфигурации (см. `.env.example`):
-
-   ```bash
-   LANGSMITH_TRACING=true
-   LANGSMITH_ENDPOINT="https://api.smith.langchain.com"
-   LANGSMITH_API_KEY="xxx"
-   LANGSMITH_PROJECT="xxx"
-   ```
-
-2. Запустите трассировку и визуализируйте граф локально с LangSmith, выполнив:
-
-   ```bash
-   langgraph dev
-   ```
-
-Это включит визуализацию трассировки в LangGraph Studio и отправит ваши трассировки в LangSmith для мониторинга и анализа.
-
-## Docker
-
-Вы также можете запустить этот проект с Docker.
-
-Во-первых, вам нужно прочитать [конфигурацию](docs/configuration_guide.md) ниже. Убедитесь, что файлы `.env`, `.conf.yaml` готовы.
-
-Во-вторых, чтобы построить Docker-образ вашего собственного веб-сервера:
-
-```bash
-docker build -t deer-flow-api .
-```
-
-Наконец, запустите Docker-контейнер с веб-сервером:
-
-```bash
-# Замените deer-flow-api-app на предпочитаемое вами имя контейнера
-# Запустите сервер и привяжите к localhost:8000
-docker run -d -t -p 127.0.0.1:8000:8000 --env-file .env --name deer-flow-api-app deer-flow-api
-
-# остановить сервер
-docker stop deer-flow-api-app
-```
-
-### Docker Compose (включает как бэкенд, так и фронтенд)
-
-DeerFlow предоставляет настройку docker-compose для легкого запуска бэкенда и фронтенда вместе:
-
-```bash
-# сборка docker-образа
-docker compose build
-
-# запуск сервера
-docker compose up
-```
-
-> [!WARNING]
-> Если вы хотите развернуть DeerFlow в производственных средах, пожалуйста, добавьте аутентификацию к веб-сайту и оцените свою проверку безопасности MCPServer и Python Repl.
-
-## Примеры
-
-Следующие примеры демонстрируют возможности DeerFlow:
-
-### Исследовательские отчеты
-
-1. **Отчет о OpenAI Sora** - Анализ инструмента ИИ Sora от OpenAI
-
-   - Обсуждаются функции, доступ, инженерия промптов, ограничения и этические соображения
-   - [Просмотреть полный отчет](examples/openai_sora_report.md)
-
-2. **Отчет о протоколе Agent to Agent от Google** - Обзор протокола Agent to Agent (A2A) от Google
-
-   - Обсуждается его роль в коммуникации агентов ИИ и его отношение к протоколу Model Context Protocol (MCP) от Anthropic
-   - [Просмотреть полный отчет](examples/what_is_agent_to_agent_protocol.md)
-
-3. **Что такое MCP?** - Комплексный анализ термина "MCP" в различных контекстах
-
-   - Исследует Model Context Protocol в ИИ, Монокальцийфосфат в химии и Микроканальные пластины в электронике
-   - [Просмотреть полный отчет](examples/what_is_mcp.md)
-
-4. **Колебания цены Биткоина** - Анализ недавних движений цены Биткоина
-
-   - Исследует рыночные тренды, регуляторные влияния и технические индикаторы
-   - Предоставляет рекомендации на основе исторических данных
-   - [Просмотреть полный отчет](examples/bitcoin_price_fluctuation.md)
-
-5. **Что такое LLM?** - Углубленное исследование больших языковых моделей
-
-   - Обсуждаются архитектура, обучение, приложения и этические соображения
-   - [Просмотреть полный отчет](examples/what_is_llm.md)
-
-6. **Как использовать Claude для глубокого исследования?** - Лучшие практики и рабочие процессы для использования Claude в глубоком исследовании
-
-   - Охватывает инженерию промптов, анализ данных и интеграцию с другими инструментами
-   - [Просмотреть полный отчет](examples/how_to_use_claude_deep_research.md)
-
-7. **Внедрение ИИ в здравоохранении: Влияющие факторы** - Анализ факторов, движущих внедрением ИИ в здравоохранении
-
-   - Обсуждаются технологии ИИ, качество данных, этические соображения, экономические оценки, организационная готовность и цифровая инфраструктура
-   - [Просмотреть полный отчет](examples/AI_adoption_in_healthcare.md)
-
-8. **Влияние квантовых вычислений на криптографию** - Анализ влияния квантовых вычислений на криптографию
-
-   - Обсуждаются уязвимости классической криптографии, пост-квантовая криптография и криптографические решения, устойчивые к квантовым вычислениям
-   - [Просмотреть полный отчет](examples/Quantum_Computing_Impact_on_Cryptography.md)
-
-9. **Ключевые моменты выступлений Криштиану Роналду** - Анализ выдающихся выступлений Криштиану Роналду
-   - Обсуждаются его карьерные достижения, международные голы и выступления в различных матчах
-   - [Просмотреть полный отчет](examples/Cristiano_Ronaldo's_Performance_Highlights.md)
-
-Чтобы запустить эти примеры или создать собственные исследовательские отчеты, вы можете использовать следующие команды:
-
-```bash
-# Запустить с определенным запросом
-uv run main.py "Какие факторы влияют на внедрение ИИ в здравоохранении?"
-
-# Запустить с пользовательскими параметрами планирования
-uv run main.py --max_plan_iterations 3 "Как квантовые вычисления влияют на криптографию?"
-
-# Запустить в интерактивном режиме с встроенными вопросами
-uv run main.py --interactive
-
-# Или запустить с базовым интерактивным приглашением
-uv run main.py
-
-# Посмотреть все доступные опции 
-uv run main.py --help
-```
-
-### Интерактивный режим
-
-Приложение теперь поддерживает интерактивный режим с встроенными вопросами как на английском, так и на китайском языках:
-
-1. Запустите интерактивный режим:
-
-   ```bash
-   uv run main.py --interactive
-   ```
-
-2. Выберите предпочитаемый язык (English или 中文)
-
-3. Выберите из списка встроенных вопросов или выберите опцию задать собственный вопрос
-
-4. Система обработает ваш вопрос и сгенерирует комплексный исследовательский отчет
-
-### Человек в контуре
-
-DeerFlow включает механизм "человек в контуре", который позволяет вам просматривать, редактировать и утверждать планы исследования перед их выполнением:
-
-1. **Просмотр плана**: Когда активирован режим "человек в контуре", система представит сгенерированный план исследования для вашего просмотра перед выполнением
-
-2. **Предоставление обратной связи**: Вы можете:
-
-   - Принять план, ответив `[ACCEPTED]`
-   - Отредактировать план, предоставив обратную связь (например, `[EDIT PLAN] Добавить больше шагов о технической реализации`)
-   - Система включит вашу обратную связь и сгенерирует пересмотренный план
-
-3. **Автоматическое принятие**: Вы можете включить автоматическое принятие, чтобы пропустить процесс просмотра:
-
-   - Через API: Установите `auto_accepted_plan: true` в вашем запросе
-
-4. **Интеграция API**: При использовании API вы можете предоставить обратную связь через параметр `feedback`:
-
-   ```json
-   {
-     "messages": [{ "role": "user", "content": "Что такое квантовые вычисления?" }],
-     "thread_id": "my_thread_id",
-     "auto_accepted_plan": false,
-     "feedback": "[EDIT PLAN] Включить больше о квантовых алгоритмах"
-   }
-   ```
-
-### Аргументы командной строки
-
-Приложение поддерживает несколько аргументов командной строки для настройки его поведения:
-
-- **query**: Запрос исследования для обработки (может состоять из нескольких слов)
-- **--interactive**: Запустить в интерактивном режиме с встроенными вопросами
-- **--max_plan_iterations**: Максимальное количество циклов планирования (по умолчанию: 1)
-- **--max_step_num**: Максимальное количество шагов в плане исследования (по умолчанию: 3)
-- **--debug**: Включить подробное логирование отладки
-
-## FAQ
-
-Пожалуйста, обратитесь к [FAQ.md](docs/FAQ.md) для получения дополнительной информации.
+Приветствуем контрибьюторов! Настройка среды разработки, воркфлоу и гайдлайны — в [CONTRIBUTING.md](CONTRIBUTING.md).
 
 ## Лицензия
 
-Этот проект имеет открытый исходный код и доступен под [Лицензией MIT](./LICENSE).
+Проект распространяется под [лицензией MIT](./LICENSE).
 
 ## Благодарности
 
-DeerFlow создан на основе невероятной работы сообщества открытого кода. Мы глубоко благодарны всем проектам и контрибьюторам, чьи усилия сделали DeerFlow возможным. Поистине, мы стоим на плечах гигантов.
+DeerFlow стоит на плечах open-source сообщества. Спасибо всем проектам и разработчикам, чья работа сделала его возможным.
 
-Мы хотели бы выразить искреннюю признательность следующим проектам за их неоценимый вклад:
+Отдельная благодарность:
 
-- **[LangChain](https://github.com/langchain-ai/langchain)**: Их исключительный фреймворк обеспечивает наши взаимодействия и цепочки LLM, позволяя бесшовную интеграцию и функциональность.
-- **[LangGraph](https://github.com/langchain-ai/langgraph)**: Их инновационный подход к оркестровке многоагентных систем сыграл решающую роль в обеспечении сложных рабочих процессов DeerFlow.
-
-Эти проекты являются примером преобразующей силы сотрудничества в области открытого кода, и мы гордимся тем, что строим на их основе.
+- **[LangChain](https://github.com/langchain-ai/langchain)** — фреймворк для взаимодействия с LLM и построения цепочек.
+- **[LangGraph](https://github.com/langchain-ai/langgraph)** — многоагентная оркестрация, на которой держатся сложные воркфлоу DeerFlow.
 
 ### Ключевые контрибьюторы
 
-Сердечная благодарность основным авторам `DeerFlow`, чье видение, страсть и преданность делу вдохнули жизнь в этот проект:
+Авторы DeerFlow, без которых проекта бы не было:
 
 - **[Daniel Walnut](https://github.com/hetaoBackend/)**
 - **[Henry Li](https://github.com/magiccube/)**
 
-Ваша непоколебимая приверженность и опыт стали движущей силой успеха DeerFlow. Мы считаем за честь иметь вас во главе этого путешествия.
+## История звёзд
 
-## История звезд
-
-[![Star History Chart](https://api.star-history.com/svg?repos=bytedance/deer-flow&type=Date)](https://star-history.com/#bytedance/deer-flow&Date)
+[![Star History Chart](https://api.star-history.com/svg?repos=bytedance/deer-flow&type=Date)](https://star-history.com/#bytedance/deer-flow&Date)

SECURITY.md

@@ -2,7 +2,10 @@
 
 ## Supported Versions
 
-As deer-flow doesn't provide an offical release yet, please use the latest version for the security updates.
+As deer-flow doesn't provide an official release yet, please use the latest version for the security updates.
+Currently, we have two branches to maintain:
+* main branch for deer-flow 2.x
+* main-1.x branch for deer-flow 1.x 
 
 ## Reporting a Vulnerability
 

backend/.gitignore

@@ -0,0 +1,28 @@
+# Python-generated files
+__pycache__/
+*.py[oc]
+build/
+dist/
+wheels/
+*.egg-info
+.coverage
+.coverage.*
+.ruff_cache
+agent_history.gif
+static/browser_history/*.gif
+
+log/
+log/*
+
+# Virtual environments
+.venv
+venv/
+
+# User config file
+config.yaml
+
+# Langgraph
+.langgraph_api
+
+# Claude Code settings
+.claude/settings.local.json

backend/.vscode/extensions.json

@@ -0,0 +1,3 @@
+{
+  "recommendations": ["charliermarsh.ruff"]
+}

backend/.vscode/settings.json

@@ -0,0 +1,11 @@
+{
+  "window.title": "${activeEditorShort}${separator}${separator}deer-flow/backend",
+  "[python]": {
+    "editor.formatOnSave": true,
+    "editor.codeActionsOnSave": {
+      "source.fixAll": "explicit",
+      "source.organizeImports": "explicit"
+    },
+    "editor.defaultFormatter": "charliermarsh.ruff"
+  }
+}

backend/AGENTS.md

@@ -0,0 +1,2 @@
+For the backend architecture and design patterns:
+@./CLAUDE.md

backend/CLAUDE.md

@@ -0,0 +1,555 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+DeerFlow is a LangGraph-based AI super agent system with a full-stack architecture. The backend provides a "super agent" with sandbox execution, persistent memory, subagent delegation, and extensible tool integration - all operating in per-thread isolated environments.
+
+**Architecture**:
+- **LangGraph Server** (port 2024): Agent runtime and workflow execution
+- **Gateway API** (port 8001): REST API for models, MCP, skills, memory, artifacts, uploads, and local thread cleanup
+- **Frontend** (port 3000): Next.js web interface
+- **Nginx** (port 2026): Unified reverse proxy entry point
+- **Provisioner** (port 8002, optional in Docker dev): Started only when sandbox is configured for provisioner/Kubernetes mode
+
+**Runtime Modes**:
+- **Standard mode** (`make dev`): LangGraph Server handles agent execution as a separate process. 4 processes total.
+- **Gateway mode** (`make dev-pro`, experimental): Agent runtime embedded in Gateway via `RunManager` + `run_agent()` + `StreamBridge` (`packages/harness/deerflow/runtime/`). Service manages its own concurrency via async tasks. 3 processes total, no LangGraph Server.
+
+**Project Structure**:
+```
+deer-flow/
+├── Makefile                    # Root commands (check, install, dev, stop)
+├── config.yaml                 # Main application configuration
+├── extensions_config.json      # MCP servers and skills configuration
+├── backend/                    # Backend application (this directory)
+│   ├── Makefile               # Backend-only commands (dev, gateway, lint)
+│   ├── langgraph.json         # LangGraph server configuration
+│   ├── packages/
+│   │   └── harness/           # deerflow-harness package (import: deerflow.*)
+│   │       ├── pyproject.toml
+│   │       └── deerflow/
+│   │           ├── agents/            # LangGraph agent system
+│   │           │   ├── lead_agent/    # Main agent (factory + system prompt)
+│   │           │   ├── middlewares/   # 10 middleware components
+│   │           │   ├── memory/        # Memory extraction, queue, prompts
+│   │           │   └── thread_state.py # ThreadState schema
+│   │           ├── sandbox/           # Sandbox execution system
+│   │           │   ├── local/         # Local filesystem provider
+│   │           │   ├── sandbox.py     # Abstract Sandbox interface
+│   │           │   ├── tools.py       # bash, ls, read/write/str_replace
+│   │           │   └── middleware.py  # Sandbox lifecycle management
+│   │           ├── subagents/         # Subagent delegation system
+│   │           │   ├── builtins/      # general-purpose, bash agents
+│   │           │   ├── executor.py    # Background execution engine
+│   │           │   └── registry.py    # Agent registry
+│   │           ├── tools/builtins/    # Built-in tools (present_files, ask_clarification, view_image)
+│   │           ├── mcp/               # MCP integration (tools, cache, client)
+│   │           ├── models/            # Model factory with thinking/vision support
+│   │           ├── skills/            # Skills discovery, loading, parsing
+│   │           ├── config/            # Configuration system (app, model, sandbox, tool, etc.)
+│   │           ├── community/         # Community tools (tavily, jina_ai, firecrawl, image_search, aio_sandbox)
+│   │           ├── reflection/        # Dynamic module loading (resolve_variable, resolve_class)
+│   │           ├── utils/             # Utilities (network, readability)
+│   │           └── client.py          # Embedded Python client (DeerFlowClient)
+│   ├── app/                   # Application layer (import: app.*)
+│   │   ├── gateway/           # FastAPI Gateway API
+│   │   │   ├── app.py         # FastAPI application
+│   │   │   └── routers/       # FastAPI route modules (models, mcp, memory, skills, uploads, threads, artifacts, agents, suggestions, channels)
+│   │   └── channels/          # IM platform integrations
+│   ├── tests/                 # Test suite
+│   └── docs/                  # Documentation
+├── frontend/                   # Next.js frontend application
+└── skills/                     # Agent skills directory
+    ├── public/                # Public skills (committed)
+    └── custom/                # Custom skills (gitignored)
+```
+
+## Important Development Guidelines
+
+### Documentation Update Policy
+**CRITICAL: Always update README.md and CLAUDE.md after every code change**
+
+When making code changes, you MUST update the relevant documentation:
+- Update `README.md` for user-facing changes (features, setup, usage instructions)
+- Update `CLAUDE.md` for development changes (architecture, commands, workflows, internal systems)
+- Keep documentation synchronized with the codebase at all times
+- Ensure accuracy and timeliness of all documentation
+
+## Commands
+
+**Root directory** (for full application):
+```bash
+make check      # Check system requirements
+make install    # Install all dependencies (frontend + backend)
+make dev        # Start all services (LangGraph + Gateway + Frontend + Nginx), with config.yaml preflight
+make dev-pro    # Gateway mode (experimental): skip LangGraph, agent runtime embedded in Gateway
+make start-pro  # Production + Gateway mode (experimental)
+make stop       # Stop all services
+```
+
+**Backend directory** (for backend development only):
+```bash
+make install    # Install backend dependencies
+make dev        # Run LangGraph server only (port 2024)
+make gateway    # Run Gateway API only (port 8001)
+make test       # Run all backend tests
+make lint       # Lint with ruff
+make format     # Format code with ruff
+```
+
+Regression tests related to Docker/provisioner behavior:
+- `tests/test_docker_sandbox_mode_detection.py` (mode detection from `config.yaml`)
+- `tests/test_provisioner_kubeconfig.py` (kubeconfig file/directory handling)
+
+Boundary check (harness → app import firewall):
+- `tests/test_harness_boundary.py` — ensures `packages/harness/deerflow/` never imports from `app.*`
+
+CI runs these regression tests for every pull request via [.github/workflows/backend-unit-tests.yml](../.github/workflows/backend-unit-tests.yml).
+
+## Architecture
+
+### Harness / App Split
+
+The backend is split into two layers with a strict dependency direction:
+
+- **Harness** (`packages/harness/deerflow/`): Publishable agent framework package (`deerflow-harness`). Import prefix: `deerflow.*`. Contains agent orchestration, tools, sandbox, models, MCP, skills, config — everything needed to build and run agents.
+- **App** (`app/`): Unpublished application code. Import prefix: `app.*`. Contains the FastAPI Gateway API and IM channel integrations (Feishu, Slack, Telegram).
+
+**Dependency rule**: App imports deerflow, but deerflow never imports app. This boundary is enforced by `tests/test_harness_boundary.py` which runs in CI.
+
+**Import conventions**:
+```python
+# Harness internal
+from deerflow.agents import make_lead_agent
+from deerflow.models import create_chat_model
+
+# App internal
+from app.gateway.app import app
+from app.channels.service import start_channel_service
+
+# App → Harness (allowed)
+from deerflow.config import get_app_config
+
+# Harness → App (FORBIDDEN — enforced by test_harness_boundary.py)
+# from app.gateway.routers.uploads import ...  # ← will fail CI
+```
+
+### Agent System
+
+**Lead Agent** (`packages/harness/deerflow/agents/lead_agent/agent.py`):
+- Entry point: `make_lead_agent(config: RunnableConfig)` registered in `langgraph.json`
+- Dynamic model selection via `create_chat_model()` with thinking/vision support
+- Tools loaded via `get_available_tools()` - combines sandbox, built-in, MCP, community, and subagent tools
+- System prompt generated by `apply_prompt_template()` with skills, memory, and subagent instructions
+
+**ThreadState** (`packages/harness/deerflow/agents/thread_state.py`):
+- Extends `AgentState` with: `sandbox`, `thread_data`, `title`, `artifacts`, `todos`, `uploaded_files`, `viewed_images`
+- Uses custom reducers: `merge_artifacts` (deduplicate), `merge_viewed_images` (merge/clear)
+
+**Runtime Configuration** (via `config.configurable`):
+- `thinking_enabled` - Enable model's extended thinking
+- `model_name` - Select specific LLM model
+- `is_plan_mode` - Enable TodoList middleware
+- `subagent_enabled` - Enable task delegation tool
+
+### Middleware Chain
+
+Middlewares execute in strict order in `packages/harness/deerflow/agents/lead_agent/agent.py`:
+
+1. **ThreadDataMiddleware** - Creates per-thread directories (`backend/.deer-flow/threads/{thread_id}/user-data/{workspace,uploads,outputs}`); Web UI thread deletion now follows LangGraph thread removal with Gateway cleanup of the local `.deer-flow/threads/{thread_id}` directory
+2. **UploadsMiddleware** - Tracks and injects newly uploaded files into conversation
+3. **SandboxMiddleware** - Acquires sandbox, stores `sandbox_id` in state
+4. **DanglingToolCallMiddleware** - Injects placeholder ToolMessages for AIMessage tool_calls that lack responses (e.g., due to user interruption)
+5. **GuardrailMiddleware** - Pre-tool-call authorization via pluggable `GuardrailProvider` protocol (optional, if `guardrails.enabled` in config). Evaluates each tool call and returns error ToolMessage on deny. Three provider options: built-in `AllowlistProvider` (zero deps), OAP policy providers (e.g. `aport-agent-guardrails`), or custom providers. See [docs/GUARDRAILS.md](docs/GUARDRAILS.md) for setup, usage, and how to implement a provider.
+6. **SummarizationMiddleware** - Context reduction when approaching token limits (optional, if enabled)
+7. **TodoListMiddleware** - Task tracking with `write_todos` tool (optional, if plan_mode)
+8. **TitleMiddleware** - Auto-generates thread title after first complete exchange and normalizes structured message content before prompting the title model
+9. **MemoryMiddleware** - Queues conversations for async memory update (filters to user + final AI responses)
+10. **ViewImageMiddleware** - Injects base64 image data before LLM call (conditional on vision support)
+11. **SubagentLimitMiddleware** - Truncates excess `task` tool calls from model response to enforce `MAX_CONCURRENT_SUBAGENTS` limit (optional, if subagent_enabled)
+12. **ClarificationMiddleware** - Intercepts `ask_clarification` tool calls, interrupts via `Command(goto=END)` (must be last)
+
+### Configuration System
+
+**Main Configuration** (`config.yaml`):
+
+Setup: Copy `config.example.yaml` to `config.yaml` in the **project root** directory.
+
+**Config Versioning**: `config.example.yaml` has a `config_version` field. On startup, `AppConfig.from_file()` compares user version vs example version and emits a warning if outdated. Missing `config_version` = version 0. Run `make config-upgrade` to auto-merge missing fields. When changing the config schema, bump `config_version` in `config.example.yaml`.
+
+**Config Caching**: `get_app_config()` caches the parsed config, but automatically reloads it when the resolved config path changes or the file's mtime increases. This keeps Gateway and LangGraph reads aligned with `config.yaml` edits without requiring a manual process restart.
+
+Configuration priority:
+1. Explicit `config_path` argument
+2. `DEER_FLOW_CONFIG_PATH` environment variable
+3. `config.yaml` in current directory (backend/)
+4. `config.yaml` in parent directory (project root - **recommended location**)
+
+Config values starting with `$` are resolved as environment variables (e.g., `$OPENAI_API_KEY`).
+`ModelConfig` also declares `use_responses_api` and `output_version` so OpenAI `/v1/responses` can be enabled explicitly while still using `langchain_openai:ChatOpenAI`.
+
+**Extensions Configuration** (`extensions_config.json`):
+
+MCP servers and skills are configured together in `extensions_config.json` in project root:
+
+Configuration priority:
+1. Explicit `config_path` argument
+2. `DEER_FLOW_EXTENSIONS_CONFIG_PATH` environment variable
+3. `extensions_config.json` in current directory (backend/)
+4. `extensions_config.json` in parent directory (project root - **recommended location**)
+
+### Gateway API (`app/gateway/`)
+
+FastAPI application on port 8001 with health check at `GET /health`.
+
+**Routers**:
+
+| Router | Endpoints |
+|--------|-----------|
+| **Models** (`/api/models`) | `GET /` - list models; `GET /{name}` - model details |
+| **MCP** (`/api/mcp`) | `GET /config` - get config; `PUT /config` - update config (saves to extensions_config.json) |
+| **Skills** (`/api/skills`) | `GET /` - list skills; `GET /{name}` - details; `PUT /{name}` - update enabled; `POST /install` - install from .skill archive (accepts standard optional frontmatter like `version`, `author`, `compatibility`) |
+| **Memory** (`/api/memory`) | `GET /` - memory data; `POST /reload` - force reload; `GET /config` - config; `GET /status` - config + data |
+| **Uploads** (`/api/threads/{id}/uploads`) | `POST /` - upload files (auto-converts PDF/PPT/Excel/Word); `GET /list` - list; `DELETE /{filename}` - delete |
+| **Threads** (`/api/threads/{id}`) | `DELETE /` - remove DeerFlow-managed local thread data after LangGraph thread deletion; unexpected failures are logged server-side and return a generic 500 detail |
+| **Artifacts** (`/api/threads/{id}/artifacts`) | `GET /{path}` - serve artifacts; active content types (`text/html`, `application/xhtml+xml`, `image/svg+xml`) are always forced as download attachments to reduce XSS risk; `?download=true` still forces download for other file types |
+| **Suggestions** (`/api/threads/{id}/suggestions`) | `POST /` - generate follow-up questions; rich list/block model content is normalized before JSON parsing |
+
+Proxied through nginx: `/api/langgraph/*` → LangGraph, all other `/api/*` → Gateway.
+
+### Sandbox System (`packages/harness/deerflow/sandbox/`)
+
+**Interface**: Abstract `Sandbox` with `execute_command`, `read_file`, `write_file`, `list_dir`
+**Provider Pattern**: `SandboxProvider` with `acquire`, `get`, `release` lifecycle
+**Implementations**:
+- `LocalSandboxProvider` - Singleton local filesystem execution with path mappings
+- `AioSandboxProvider` (`packages/harness/deerflow/community/`) - Docker-based isolation
+
+**Virtual Path System**:
+- Agent sees: `/mnt/user-data/{workspace,uploads,outputs}`, `/mnt/skills`
+- Physical: `backend/.deer-flow/threads/{thread_id}/user-data/...`, `deer-flow/skills/`
+- Translation: `replace_virtual_path()` / `replace_virtual_paths_in_command()`
+- Detection: `is_local_sandbox()` checks `sandbox_id == "local"`
+
+**Sandbox Tools** (in `packages/harness/deerflow/sandbox/tools.py`):
+- `bash` - Execute commands with path translation and error handling
+- `ls` - Directory listing (tree format, max 2 levels)
+- `read_file` - Read file contents with optional line range
+- `write_file` - Write/append to files, creates directories
+- `str_replace` - Substring replacement (single or all occurrences); same-path serialization is scoped to `(sandbox.id, path)` so isolated sandboxes do not contend on identical virtual paths inside one process
+
+### Subagent System (`packages/harness/deerflow/subagents/`)
+
+**Built-in Agents**: `general-purpose` (all tools except `task`) and `bash` (command specialist)
+**Execution**: Dual thread pool - `_scheduler_pool` (3 workers) + `_execution_pool` (3 workers)
+**Concurrency**: `MAX_CONCURRENT_SUBAGENTS = 3` enforced by `SubagentLimitMiddleware` (truncates excess tool calls in `after_model`), 15-minute timeout
+**Flow**: `task()` tool → `SubagentExecutor` → background thread → poll 5s → SSE events → result
+**Events**: `task_started`, `task_running`, `task_completed`/`task_failed`/`task_timed_out`
+
+### Tool System (`packages/harness/deerflow/tools/`)
+
+`get_available_tools(groups, include_mcp, model_name, subagent_enabled)` assembles:
+1. **Config-defined tools** - Resolved from `config.yaml` via `resolve_variable()`
+2. **MCP tools** - From enabled MCP servers (lazy initialized, cached with mtime invalidation)
+3. **Built-in tools**:
+   - `present_files` - Make output files visible to user (only `/mnt/user-data/outputs`)
+   - `ask_clarification` - Request clarification (intercepted by ClarificationMiddleware → interrupts)
+   - `view_image` - Read image as base64 (added only if model supports vision)
+4. **Subagent tool** (if enabled):
+   - `task` - Delegate to subagent (description, prompt, subagent_type, max_turns)
+
+**Community tools** (`packages/harness/deerflow/community/`):
+- `tavily/` - Web search (5 results default) and web fetch (4KB limit)
+- `jina_ai/` - Web fetch via Jina reader API with readability extraction
+- `firecrawl/` - Web scraping via Firecrawl API
+
+**ACP agent tools**:
+- `invoke_acp_agent` - Invokes external ACP-compatible agents from `config.yaml`
+- ACP launchers must be real ACP adapters. The standard `codex` CLI is not ACP-compatible by itself; configure a wrapper such as `npx -y @zed-industries/codex-acp` or an installed `codex-acp` binary
+- Missing ACP executables now return an actionable error message instead of a raw `[Errno 2]`
+- Each ACP agent uses a per-thread workspace at `{base_dir}/threads/{thread_id}/acp-workspace/`. The workspace is accessible to the lead agent via the virtual path `/mnt/acp-workspace/` (read-only). In docker sandbox mode, the directory is volume-mounted into the container at `/mnt/acp-workspace` (read-only); in local sandbox mode, path translation is handled by `tools.py`
+- `image_search/` - Image search via DuckDuckGo
+
+### MCP System (`packages/harness/deerflow/mcp/`)
+
+- Uses `langchain-mcp-adapters` `MultiServerMCPClient` for multi-server management
+- **Lazy initialization**: Tools loaded on first use via `get_cached_mcp_tools()`
+- **Cache invalidation**: Detects config file changes via mtime comparison
+- **Transports**: stdio (command-based), SSE, HTTP
+- **OAuth (HTTP/SSE)**: Supports token endpoint flows (`client_credentials`, `refresh_token`) with automatic token refresh + Authorization header injection
+- **Runtime updates**: Gateway API saves to extensions_config.json; LangGraph detects via mtime
+
+### Skills System (`packages/harness/deerflow/skills/`)
+
+- **Location**: `deer-flow/skills/{public,custom}/`
+- **Format**: Directory with `SKILL.md` (YAML frontmatter: name, description, license, allowed-tools)
+- **Loading**: `load_skills()` recursively scans `skills/{public,custom}` for `SKILL.md`, parses metadata, and reads enabled state from extensions_config.json
+- **Injection**: Enabled skills listed in agent system prompt with container paths
+- **Installation**: `POST /api/skills/install` extracts .skill ZIP archive to custom/ directory
+
+### Model Factory (`packages/harness/deerflow/models/factory.py`)
+
+- `create_chat_model(name, thinking_enabled)` instantiates LLM from config via reflection
+- Supports `thinking_enabled` flag with per-model `when_thinking_enabled` overrides
+- Supports vLLM-style thinking toggles via `when_thinking_enabled.extra_body.chat_template_kwargs.enable_thinking` for Qwen reasoning models, while normalizing legacy `thinking` configs for backward compatibility
+- Supports `supports_vision` flag for image understanding models
+- Config values starting with `$` resolved as environment variables
+- Missing provider modules surface actionable install hints from reflection resolvers (for example `uv add langchain-google-genai`)
+
+### vLLM Provider (`packages/harness/deerflow/models/vllm_provider.py`)
+
+- `VllmChatModel` subclasses `langchain_openai:ChatOpenAI` for vLLM 0.19.0 OpenAI-compatible endpoints
+- Preserves vLLM's non-standard assistant `reasoning` field on full responses, streaming deltas, and follow-up tool-call turns
+- Designed for configs that enable thinking through `extra_body.chat_template_kwargs.enable_thinking` on vLLM 0.19.0 Qwen reasoning models, while accepting the older `thinking` alias
+
+### IM Channels System (`app/channels/`)
+
+Bridges external messaging platforms (Feishu, Slack, Telegram) to the DeerFlow agent via the LangGraph Server.
+
+**Architecture**: Channels communicate with the LangGraph Server through `langgraph-sdk` HTTP client (same as the frontend), ensuring threads are created and managed server-side.
+
+**Components**:
+- `message_bus.py` - Async pub/sub hub (`InboundMessage` → queue → dispatcher; `OutboundMessage` → callbacks → channels)
+- `store.py` - JSON-file persistence mapping `channel_name:chat_id[:topic_id]` → `thread_id` (keys are `channel:chat` for root conversations and `channel:chat:topic` for threaded conversations)
+- `manager.py` - Core dispatcher: creates threads via `client.threads.create()`, routes commands, keeps Slack/Telegram on `client.runs.wait()`, and uses `client.runs.stream(["messages-tuple", "values"])` for Feishu incremental outbound updates
+- `base.py` - Abstract `Channel` base class (start/stop/send lifecycle)
+- `service.py` - Manages lifecycle of all configured channels from `config.yaml`
+- `slack.py` / `feishu.py` / `telegram.py` - Platform-specific implementations (`feishu.py` tracks the running card `message_id` in memory and patches the same card in place)
+
+**Message Flow**:
+1. External platform -> Channel impl -> `MessageBus.publish_inbound()`
+2. `ChannelManager._dispatch_loop()` consumes from queue
+3. For chat: look up/create thread on LangGraph Server
+4. Feishu chat: `runs.stream()` → accumulate AI text → publish multiple outbound updates (`is_final=False`) → publish final outbound (`is_final=True`)
+5. Slack/Telegram chat: `runs.wait()` → extract final response → publish outbound
+6. Feishu channel sends one running reply card up front, then patches the same card for each outbound update (card JSON sets `config.update_multi=true` for Feishu's patch API requirement)
+7. For commands (`/new`, `/status`, `/models`, `/memory`, `/help`): handle locally or query Gateway API
+8. Outbound → channel callbacks → platform reply
+
+**Configuration** (`config.yaml` -> `channels`):
+- `langgraph_url` - LangGraph Server URL (default: `http://localhost:2024`)
+- `gateway_url` - Gateway API URL for auxiliary commands (default: `http://localhost:8001`)
+- In Docker Compose, IM channels run inside the `gateway` container, so `localhost` points back to that container. Use `http://langgraph:2024` / `http://gateway:8001`, or set `DEER_FLOW_CHANNELS_LANGGRAPH_URL` / `DEER_FLOW_CHANNELS_GATEWAY_URL`.
+- Per-channel configs: `feishu` (app_id, app_secret), `slack` (bot_token, app_token), `telegram` (bot_token)
+
+### Memory System (`packages/harness/deerflow/agents/memory/`)
+
+**Components**:
+- `updater.py` - LLM-based memory updates with fact extraction, whitespace-normalized fact deduplication (trims leading/trailing whitespace before comparing), and atomic file I/O
+- `queue.py` - Debounced update queue (per-thread deduplication, configurable wait time)
+- `prompt.py` - Prompt templates for memory updates
+
+**Data Structure** (stored in `backend/.deer-flow/memory.json`):
+- **User Context**: `workContext`, `personalContext`, `topOfMind` (1-3 sentence summaries)
+- **History**: `recentMonths`, `earlierContext`, `longTermBackground`
+- **Facts**: Discrete facts with `id`, `content`, `category` (preference/knowledge/context/behavior/goal), `confidence` (0-1), `createdAt`, `source`
+
+**Workflow**:
+1. `MemoryMiddleware` filters messages (user inputs + final AI responses) and queues conversation
+2. Queue debounces (30s default), batches updates, deduplicates per-thread
+3. Background thread invokes LLM to extract context updates and facts
+4. Applies updates atomically (temp file + rename) with cache invalidation, skipping duplicate fact content before append
+5. Next interaction injects top 15 facts + context into `<memory>` tags in system prompt
+
+Focused regression coverage for the updater lives in `backend/tests/test_memory_updater.py`.
+
+**Configuration** (`config.yaml` → `memory`):
+- `enabled` / `injection_enabled` - Master switches
+- `storage_path` - Path to memory.json
+- `debounce_seconds` - Wait time before processing (default: 30)
+- `model_name` - LLM for updates (null = default model)
+- `max_facts` / `fact_confidence_threshold` - Fact storage limits (100 / 0.7)
+- `max_injection_tokens` - Token limit for prompt injection (2000)
+
+### Reflection System (`packages/harness/deerflow/reflection/`)
+
+- `resolve_variable(path)` - Import module and return variable (e.g., `module.path:variable_name`)
+- `resolve_class(path, base_class)` - Import and validate class against base class
+
+### Config Schema
+
+**`config.yaml`** key sections:
+- `models[]` - LLM configs with `use` class path, `supports_thinking`, `supports_vision`, provider-specific fields
+- vLLM reasoning models should use `deerflow.models.vllm_provider:VllmChatModel`; for Qwen-style parsers prefer `when_thinking_enabled.extra_body.chat_template_kwargs.enable_thinking`, and DeerFlow will also normalize the older `thinking` alias
+- `tools[]` - Tool configs with `use` variable path and `group`
+- `tool_groups[]` - Logical groupings for tools
+- `sandbox.use` - Sandbox provider class path
+- `skills.path` / `skills.container_path` - Host and container paths to skills directory
+- `title` - Auto-title generation (enabled, max_words, max_chars, prompt_template)
+- `summarization` - Context summarization (enabled, trigger conditions, keep policy)
+- `subagents.enabled` - Master switch for subagent delegation
+- `memory` - Memory system (enabled, storage_path, debounce_seconds, model_name, max_facts, fact_confidence_threshold, injection_enabled, max_injection_tokens)
+
+**`extensions_config.json`**:
+- `mcpServers` - Map of server name → config (enabled, type, command, args, env, url, headers, oauth, description)
+- `skills` - Map of skill name → state (enabled)
+
+Both can be modified at runtime via Gateway API endpoints or `DeerFlowClient` methods.
+
+### Embedded Client (`packages/harness/deerflow/client.py`)
+
+`DeerFlowClient` provides direct in-process access to all DeerFlow capabilities without HTTP services. All return types align with the Gateway API response schemas, so consumer code works identically in HTTP and embedded modes.
+
+**Architecture**: Imports the same `deerflow` modules that LangGraph Server and Gateway API use. Shares the same config files and data directories. No FastAPI dependency.
+
+**Agent Conversation** (replaces LangGraph Server):
+- `chat(message, thread_id)` — synchronous, returns final text
+- `stream(message, thread_id)` — yields `StreamEvent` aligned with LangGraph SSE protocol:
+  - `"values"` — full state snapshot (title, messages, artifacts)
+  - `"messages-tuple"` — per-message update (AI text, tool calls, tool results)
+  - `"end"` — stream finished
+- Agent created lazily via `create_agent()` + `_build_middlewares()`, same as `make_lead_agent`
+- Supports `checkpointer` parameter for state persistence across turns
+- `reset_agent()` forces agent recreation (e.g. after memory or skill changes)
+
+**Gateway Equivalent Methods** (replaces Gateway API):
+
+| Category | Methods | Return format |
+|----------|---------|---------------|
+| Models | `list_models()`, `get_model(name)` | `{"models": [...]}`, `{name, display_name, ...}` |
+| MCP | `get_mcp_config()`, `update_mcp_config(servers)` | `{"mcp_servers": {...}}` |
+| Skills | `list_skills()`, `get_skill(name)`, `update_skill(name, enabled)`, `install_skill(path)` | `{"skills": [...]}` |
+| Memory | `get_memory()`, `reload_memory()`, `get_memory_config()`, `get_memory_status()` | dict |
+| Uploads | `upload_files(thread_id, files)`, `list_uploads(thread_id)`, `delete_upload(thread_id, filename)` | `{"success": true, "files": [...]}`, `{"files": [...], "count": N}` |
+| Artifacts | `get_artifact(thread_id, path)` → `(bytes, mime_type)` | tuple |
+
+**Key difference from Gateway**: Upload accepts local `Path` objects instead of HTTP `UploadFile`, rejects directory paths before copying, and reuses a single worker when document conversion must run inside an active event loop. Artifact returns `(bytes, mime_type)` instead of HTTP Response. The new Gateway-only thread cleanup route deletes `.deer-flow/threads/{thread_id}` after LangGraph thread deletion; there is no matching `DeerFlowClient` method yet. `update_mcp_config()` and `update_skill()` automatically invalidate the cached agent.
+
+**Tests**: `tests/test_client.py` (77 unit tests including `TestGatewayConformance`), `tests/test_client_live.py` (live integration tests, requires config.yaml)
+
+**Gateway Conformance Tests** (`TestGatewayConformance`): Validate that every dict-returning client method conforms to the corresponding Gateway Pydantic response model. Each test parses the client output through the Gateway model — if Gateway adds a required field that the client doesn't provide, Pydantic raises `ValidationError` and CI catches the drift. Covers: `ModelsListResponse`, `ModelResponse`, `SkillsListResponse`, `SkillResponse`, `SkillInstallResponse`, `McpConfigResponse`, `UploadResponse`, `MemoryConfigResponse`, `MemoryStatusResponse`.
+
+## Development Workflow
+
+### Test-Driven Development (TDD) — MANDATORY
+
+**Every new feature or bug fix MUST be accompanied by unit tests. No exceptions.**
+
+- Write tests in `backend/tests/` following the existing naming convention `test_<feature>.py`
+- Run the full suite before and after your change: `make test`
+- Tests must pass before a feature is considered complete
+- For lightweight config/utility modules, prefer pure unit tests with no external dependencies
+- If a module causes circular import issues in tests, add a `sys.modules` mock in `tests/conftest.py` (see existing example for `deerflow.subagents.executor`)
+
+```bash
+# Run all tests
+make test
+
+# Run a specific test file
+PYTHONPATH=. uv run pytest tests/test_<feature>.py -v
+```
+
+### Running the Full Application
+
+From the **project root** directory:
+```bash
+make dev
+```
+
+This starts all services and makes the application available at `http://localhost:2026`.
+
+**All startup modes:**
+
+| | **Local Foreground** | **Local Daemon** | **Docker Dev** | **Docker Prod** |
+|---|---|---|---|---|
+| **Dev** | `./scripts/serve.sh --dev`<br/>`make dev` | `./scripts/serve.sh --dev --daemon`<br/>`make dev-daemon` | `./scripts/docker.sh start`<br/>`make docker-start` | — |
+| **Dev + Gateway** | `./scripts/serve.sh --dev --gateway`<br/>`make dev-pro` | `./scripts/serve.sh --dev --gateway --daemon`<br/>`make dev-daemon-pro` | `./scripts/docker.sh start --gateway`<br/>`make docker-start-pro` | — |
+| **Prod** | `./scripts/serve.sh --prod`<br/>`make start` | `./scripts/serve.sh --prod --daemon`<br/>`make start-daemon` | — | `./scripts/deploy.sh`<br/>`make up` |
+| **Prod + Gateway** | `./scripts/serve.sh --prod --gateway`<br/>`make start-pro` | `./scripts/serve.sh --prod --gateway --daemon`<br/>`make start-daemon-pro` | — | `./scripts/deploy.sh --gateway`<br/>`make up-pro` |
+
+| Action | Local | Docker Dev | Docker Prod |
+|---|---|---|---|
+| **Stop** | `./scripts/serve.sh --stop`<br/>`make stop` | `./scripts/docker.sh stop`<br/>`make docker-stop` | `./scripts/deploy.sh down`<br/>`make down` |
+| **Restart** | `./scripts/serve.sh --restart [flags]` | `./scripts/docker.sh restart` | — |
+
+Gateway mode embeds the agent runtime in Gateway, no LangGraph server.
+
+**Nginx routing**:
+- Standard mode: `/api/langgraph/*` → LangGraph Server (2024)
+- Gateway mode: `/api/langgraph/*` → Gateway embedded runtime (8001) (via envsubst)
+- `/api/*` (other) → Gateway API (8001)
+- `/` (non-API) → Frontend (3000)
+
+### Running Backend Services Separately
+
+From the **backend** directory:
+
+```bash
+# Terminal 1: LangGraph server
+make dev
+
+# Terminal 2: Gateway API
+make gateway
+```
+
+Direct access (without nginx):
+- LangGraph: `http://localhost:2024`
+- Gateway: `http://localhost:8001`
+
+### Frontend Configuration
+
+The frontend uses environment variables to connect to backend services:
+- `NEXT_PUBLIC_LANGGRAPH_BASE_URL` - Defaults to `/api/langgraph` (through nginx)
+- `NEXT_PUBLIC_BACKEND_BASE_URL` - Defaults to empty string (through nginx)
+
+When using `make dev` from root, the frontend automatically connects through nginx.
+
+## Key Features
+
+### File Upload
+
+Multi-file upload with automatic document conversion:
+- Endpoint: `POST /api/threads/{thread_id}/uploads`
+- Supports: PDF, PPT, Excel, Word documents (converted via `markitdown`)
+- Rejects directory inputs before copying so uploads stay all-or-nothing
+- Reuses one conversion worker per request when called from an active event loop
+- Files stored in thread-isolated directories
+- Agent receives uploaded file list via `UploadsMiddleware`
+
+See [docs/FILE_UPLOAD.md](docs/FILE_UPLOAD.md) for details.
+
+### Plan Mode
+
+TodoList middleware for complex multi-step tasks:
+- Controlled via runtime config: `config.configurable.is_plan_mode = True`
+- Provides `write_todos` tool for task tracking
+- One task in_progress at a time, real-time updates
+
+See [docs/plan_mode_usage.md](docs/plan_mode_usage.md) for details.
+
+### Context Summarization
+
+Automatic conversation summarization when approaching token limits:
+- Configured in `config.yaml` under `summarization` key
+- Trigger types: tokens, messages, or fraction of max input
+- Keeps recent messages while summarizing older ones
+
+See [docs/summarization.md](docs/summarization.md) for details.
+
+### Vision Support
+
+For models with `supports_vision: true`:
+- `ViewImageMiddleware` processes images in conversation
+- `view_image_tool` added to agent's toolset
+- Images automatically converted to base64 and injected into state
+
+## Code Style
+
+- Uses `ruff` for linting and formatting
+- Line length: 240 characters
+- Python 3.12+ with type hints
+- Double quotes, space indentation
+
+## Documentation
+
+See `docs/` directory for detailed documentation:
+- [CONFIGURATION.md](docs/CONFIGURATION.md) - Configuration options
+- [ARCHITECTURE.md](docs/ARCHITECTURE.md) - Architecture details
+- [API.md](docs/API.md) - API reference
+- [SETUP.md](docs/SETUP.md) - Setup guide
+- [FILE_UPLOAD.md](docs/FILE_UPLOAD.md) - File upload feature
+- [PATH_EXAMPLES.md](docs/PATH_EXAMPLES.md) - Path types and usage
+- [summarization.md](docs/summarization.md) - Context summarization
+- [plan_mode_usage.md](docs/plan_mode_usage.md) - Plan mode with TodoList

backend/CONTRIBUTING.md

@@ -0,0 +1,426 @@
+# Contributing to DeerFlow Backend
+
+Thank you for your interest in contributing to DeerFlow! This document provides guidelines and instructions for contributing to the backend codebase.
+
+## Table of Contents
+
+- [Getting Started](#getting-started)
+- [Development Setup](#development-setup)
+- [Project Structure](#project-structure)
+- [Code Style](#code-style)
+- [Making Changes](#making-changes)
+- [Testing](#testing)
+- [Pull Request Process](#pull-request-process)
+- [Architecture Guidelines](#architecture-guidelines)
+
+## Getting Started
+
+### Prerequisites
+
+- Python 3.12 or higher
+- [uv](https://docs.astral.sh/uv/) package manager
+- Git
+- Docker (optional, for Docker sandbox testing)
+
+### Fork and Clone
+
+1. Fork the repository on GitHub
+2. Clone your fork locally:
+   ```bash
+   git clone https://github.com/YOUR_USERNAME/deer-flow.git
+   cd deer-flow
+   ```
+
+## Development Setup
+
+### Install Dependencies
+
+```bash
+# From project root
+cp config.example.yaml config.yaml
+
+# Install backend dependencies
+cd backend
+make install
+```
+
+### Configure Environment
+
+Set up your API keys for testing:
+
+```bash
+export OPENAI_API_KEY="your-api-key"
+# Add other keys as needed
+```
+
+### Run the Development Server
+
+```bash
+# Terminal 1: LangGraph server
+make dev
+
+# Terminal 2: Gateway API
+make gateway
+```
+
+## Project Structure
+
+```
+backend/src/
+├── agents/                  # Agent system
+│   ├── lead_agent/         # Main agent implementation
+│   │   └── agent.py        # Agent factory and creation
+│   ├── middlewares/        # Agent middlewares
+│   │   ├── thread_data_middleware.py
+│   │   ├── sandbox_middleware.py
+│   │   ├── title_middleware.py
+│   │   ├── uploads_middleware.py
+│   │   ├── view_image_middleware.py
+│   │   └── clarification_middleware.py
+│   └── thread_state.py     # Thread state definition
+│
+├── gateway/                 # FastAPI Gateway
+│   ├── app.py              # FastAPI application
+│   └── routers/            # Route handlers
+│       ├── models.py       # /api/models endpoints
+│       ├── mcp.py          # /api/mcp endpoints
+│       ├── skills.py       # /api/skills endpoints
+│       ├── artifacts.py    # /api/threads/.../artifacts
+│       └── uploads.py      # /api/threads/.../uploads
+│
+├── sandbox/                 # Sandbox execution
+│   ├── __init__.py         # Sandbox interface
+│   ├── local.py            # Local sandbox provider
+│   └── tools.py            # Sandbox tools (bash, file ops)
+│
+├── tools/                   # Agent tools
+│   └── builtins/           # Built-in tools
+│       ├── present_file_tool.py
+│       ├── ask_clarification_tool.py
+│       └── view_image_tool.py
+│
+├── mcp/                     # MCP integration
+│   └── manager.py          # MCP server management
+│
+├── models/                  # Model system
+│   └── factory.py          # Model factory
+│
+├── skills/                  # Skills system
+│   └── loader.py           # Skills loader
+│
+├── config/                  # Configuration
+│   ├── app_config.py       # Main app config
+│   ├── extensions_config.py # Extensions config
+│   └── summarization_config.py
+│
+├── community/               # Community tools
+│   ├── tavily/             # Tavily web search
+│   ├── jina/               # Jina web fetch
+│   ├── firecrawl/          # Firecrawl scraping
+│   └── aio_sandbox/        # Docker sandbox
+│
+├── reflection/              # Dynamic loading
+│   └── __init__.py         # Module resolution
+│
+└── utils/                   # Utilities
+    └── __init__.py
+```
+
+## Code Style
+
+### Linting and Formatting
+
+We use `ruff` for both linting and formatting:
+
+```bash
+# Check for issues
+make lint
+
+# Auto-fix and format
+make format
+```
+
+### Style Guidelines
+
+- **Line length**: 240 characters maximum
+- **Python version**: 3.12+ features allowed
+- **Type hints**: Use type hints for function signatures
+- **Quotes**: Double quotes for strings
+- **Indentation**: 4 spaces (no tabs)
+- **Imports**: Group by standard library, third-party, local
+
+### Docstrings
+
+Use docstrings for public functions and classes:
+
+```python
+def create_chat_model(name: str, thinking_enabled: bool = False) -> BaseChatModel:
+    """Create a chat model instance from configuration.
+
+    Args:
+        name: The model name as defined in config.yaml
+        thinking_enabled: Whether to enable extended thinking
+
+    Returns:
+        A configured LangChain chat model instance
+
+    Raises:
+        ValueError: If the model name is not found in configuration
+    """
+    ...
+```
+
+## Making Changes
+
+### Branch Naming
+
+Use descriptive branch names:
+
+- `feature/add-new-tool` - New features
+- `fix/sandbox-timeout` - Bug fixes
+- `docs/update-readme` - Documentation
+- `refactor/config-system` - Code refactoring
+
+### Commit Messages
+
+Write clear, concise commit messages:
+
+```
+feat: add support for Claude 3.5 model
+
+- Add model configuration in config.yaml
+- Update model factory to handle Claude-specific settings
+- Add tests for new model
+```
+
+Prefix types:
+- `feat:` - New feature
+- `fix:` - Bug fix
+- `docs:` - Documentation
+- `refactor:` - Code refactoring
+- `test:` - Tests
+- `chore:` - Build/config changes
+
+## Testing
+
+### Running Tests
+
+```bash
+uv run pytest
+```
+
+### Writing Tests
+
+Place tests in the `tests/` directory mirroring the source structure:
+
+```
+tests/
+├── test_models/
+│   └── test_factory.py
+├── test_sandbox/
+│   └── test_local.py
+└── test_gateway/
+    └── test_models_router.py
+```
+
+Example test:
+
+```python
+import pytest
+from deerflow.models.factory import create_chat_model
+
+def test_create_chat_model_with_valid_name():
+    """Test that a valid model name creates a model instance."""
+    model = create_chat_model("gpt-4")
+    assert model is not None
+
+def test_create_chat_model_with_invalid_name():
+    """Test that an invalid model name raises ValueError."""
+    with pytest.raises(ValueError):
+        create_chat_model("nonexistent-model")
+```
+
+## Pull Request Process
+
+### Before Submitting
+
+1. **Ensure tests pass**: `uv run pytest`
+2. **Run linter**: `make lint`
+3. **Format code**: `make format`
+4. **Update documentation** if needed
+
+### PR Description
+
+Include in your PR description:
+
+- **What**: Brief description of changes
+- **Why**: Motivation for the change
+- **How**: Implementation approach
+- **Testing**: How you tested the changes
+
+### Review Process
+
+1. Submit PR with clear description
+2. Address review feedback
+3. Ensure CI passes
+4. Maintainer will merge when approved
+
+## Architecture Guidelines
+
+### Adding New Tools
+
+1. Create tool in `packages/harness/deerflow/tools/builtins/` or `packages/harness/deerflow/community/`:
+
+```python
+# packages/harness/deerflow/tools/builtins/my_tool.py
+from langchain_core.tools import tool
+
+@tool
+def my_tool(param: str) -> str:
+    """Tool description for the agent.
+
+    Args:
+        param: Description of the parameter
+
+    Returns:
+        Description of return value
+    """
+    return f"Result: {param}"
+```
+
+2. Register in `config.yaml`:
+
+```yaml
+tools:
+  - name: my_tool
+    group: my_group
+    use: deerflow.tools.builtins.my_tool:my_tool
+```
+
+### Adding New Middleware
+
+1. Create middleware in `packages/harness/deerflow/agents/middlewares/`:
+
+```python
+# packages/harness/deerflow/agents/middlewares/my_middleware.py
+from langchain.agents.middleware import BaseMiddleware
+from langchain_core.runnables import RunnableConfig
+
+class MyMiddleware(BaseMiddleware):
+    """Middleware description."""
+
+    def transform_state(self, state: dict, config: RunnableConfig) -> dict:
+        """Transform the state before agent execution."""
+        # Modify state as needed
+        return state
+```
+
+2. Register in `packages/harness/deerflow/agents/lead_agent/agent.py`:
+
+```python
+middlewares = [
+    ThreadDataMiddleware(),
+    SandboxMiddleware(),
+    MyMiddleware(),  # Add your middleware
+    TitleMiddleware(),
+    ClarificationMiddleware(),
+]
+```
+
+### Adding New API Endpoints
+
+1. Create router in `app/gateway/routers/`:
+
+```python
+# app/gateway/routers/my_router.py
+from fastapi import APIRouter
+
+router = APIRouter(prefix="/my-endpoint", tags=["my-endpoint"])
+
+@router.get("/")
+async def get_items():
+    """Get all items."""
+    return {"items": []}
+
+@router.post("/")
+async def create_item(data: dict):
+    """Create a new item."""
+    return {"created": data}
+```
+
+2. Register in `app/gateway/app.py`:
+
+```python
+from app.gateway.routers import my_router
+
+app.include_router(my_router.router)
+```
+
+### Configuration Changes
+
+When adding new configuration options:
+
+1. Update `packages/harness/deerflow/config/app_config.py` with new fields
+2. Add default values in `config.example.yaml`
+3. Document in `docs/CONFIGURATION.md`
+
+### MCP Server Integration
+
+To add support for a new MCP server:
+
+1. Add configuration in `extensions_config.json`:
+
+```json
+{
+  "mcpServers": {
+    "my-server": {
+      "enabled": true,
+      "type": "stdio",
+      "command": "npx",
+      "args": ["-y", "@my-org/mcp-server"],
+      "description": "My MCP Server"
+    }
+  }
+}
+```
+
+2. Update `extensions_config.example.json` with the new server
+
+### Skills Development
+
+To create a new skill:
+
+1. Create directory in `skills/public/` or `skills/custom/`:
+
+```
+skills/public/my-skill/
+└── SKILL.md
+```
+
+2. Write `SKILL.md` with YAML front matter:
+
+```markdown
+---
+name: My Skill
+description: What this skill does
+license: MIT
+allowed-tools:
+  - read_file
+  - write_file
+  - bash
+---
+
+# My Skill
+
+Instructions for the agent when this skill is enabled...
+```
+
+## Questions?
+
+If you have questions about contributing:
+
+1. Check existing documentation in `docs/`
+2. Look for similar issues or PRs on GitHub
+3. Open a discussion or issue on GitHub
+
+Thank you for contributing to DeerFlow!

backend/Dockerfile

@@ -0,0 +1,91 @@
+# Backend Dockerfile — multi-stage build
+# Stage 1 (builder): compiles native Python extensions with build-essential
+# Stage 2 (dev):     retains toolchain for dev containers (uv sync at startup)
+# Stage 3 (runtime): clean image without compiler toolchain for production
+
+# UV source image (override for restricted networks that cannot reach ghcr.io)
+ARG UV_IMAGE=ghcr.io/astral-sh/uv:0.7.20
+FROM ${UV_IMAGE} AS uv-source
+
+# ── Stage 1: Builder ──────────────────────────────────────────────────────────
+FROM python:3.12-slim-bookworm AS builder
+
+ARG NODE_MAJOR=22
+ARG APT_MIRROR
+ARG UV_INDEX_URL
+# Optional extras to install (e.g. "postgres" for PostgreSQL support)
+# Usage: docker build --build-arg UV_EXTRAS=postgres ...
+ARG UV_EXTRAS
+
+# Optionally override apt mirror for restricted networks (e.g. APT_MIRROR=mirrors.aliyun.com)
+RUN if [ -n "${APT_MIRROR}" ]; then \
+      sed -i "s|deb.debian.org|${APT_MIRROR}|g" /etc/apt/sources.list.d/debian.sources 2>/dev/null || true; \
+      sed -i "s|deb.debian.org|${APT_MIRROR}|g" /etc/apt/sources.list 2>/dev/null || true; \
+    fi
+
+# Install build tools + Node.js (build-essential needed for native Python extensions)
+RUN apt-get update && apt-get install -y \
+    curl \
+    build-essential \
+    gnupg \
+    ca-certificates \
+    && mkdir -p /etc/apt/keyrings \
+    && curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg \
+    && echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_${NODE_MAJOR}.x nodistro main" > /etc/apt/sources.list.d/nodesource.list \
+    && apt-get update \
+    && apt-get install -y nodejs \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install uv (source image overridable via UV_IMAGE build arg)
+COPY --from=uv-source /uv /uvx /usr/local/bin/
+
+# Set working directory
+WORKDIR /app
+
+# Copy backend source code
+COPY backend ./backend
+
+# Install dependencies with cache mount
+# When UV_EXTRAS is set (e.g. "postgres"), installs optional dependencies.
+RUN --mount=type=cache,target=/root/.cache/uv \
+    sh -c "cd backend && UV_INDEX_URL=${UV_INDEX_URL:-https://pypi.org/simple} uv sync ${UV_EXTRAS:+--extra $UV_EXTRAS}"
+
+# ── Stage 2: Dev ──────────────────────────────────────────────────────────────
+# Retains compiler toolchain from builder so startup-time `uv sync` can build
+# source distributions in development containers.
+FROM builder AS dev
+
+# Install Docker CLI (for DooD: allows starting sandbox containers via host Docker socket)
+COPY --from=docker:cli /usr/local/bin/docker /usr/local/bin/docker
+
+EXPOSE 8001 2024
+
+CMD ["sh", "-c", "cd backend && PYTHONPATH=. uv run uvicorn app.gateway.app:app --host 0.0.0.0 --port 8001"]
+
+# ── Stage 3: Runtime ──────────────────────────────────────────────────────────
+# Clean image without build-essential — reduces size (~200 MB) and attack surface.
+FROM python:3.12-slim-bookworm
+
+# Copy Node.js runtime from builder (provides npx for MCP servers)
+COPY --from=builder /usr/bin/node /usr/bin/node
+COPY --from=builder /usr/lib/node_modules /usr/lib/node_modules
+RUN ln -s ../lib/node_modules/npm/bin/npm-cli.js /usr/bin/npm \
+    && ln -s ../lib/node_modules/npm/bin/npx-cli.js /usr/bin/npx
+
+# Install Docker CLI (for DooD: allows starting sandbox containers via host Docker socket)
+COPY --from=docker:cli /usr/local/bin/docker /usr/local/bin/docker
+
+# Install uv (source image overridable via UV_IMAGE build arg)
+COPY --from=uv-source /uv /uvx /usr/local/bin/
+
+# Set working directory
+WORKDIR /app
+
+# Copy backend with pre-built virtualenv from builder
+COPY --from=builder /app/backend ./backend
+
+# Expose ports (gateway: 8001, langgraph: 2024)
+EXPOSE 8001 2024
+
+# Default command (can be overridden in docker-compose)
+CMD ["sh", "-c", "cd backend && PYTHONPATH=. uv run uvicorn app.gateway.app:app --host 0.0.0.0 --port 8001"]

backend/Makefile

@@ -0,0 +1,18 @@
+install:
+	uv sync
+
+dev:
+	uv run langgraph dev --no-browser --no-reload --n-jobs-per-worker 10
+
+gateway:
+	PYTHONPATH=. uv run uvicorn app.gateway.app:app --host 0.0.0.0 --port 8001
+
+test:
+	PYTHONPATH=. uv run pytest tests/ -v
+
+lint:
+	uvx ruff check .
+	uvx ruff format --check .
+
+format:
+	uvx ruff check . --fix && uvx ruff format .

backend/README.md

@@ -0,0 +1,418 @@
+# DeerFlow Backend
+
+DeerFlow is a LangGraph-based AI super agent with sandbox execution, persistent memory, and extensible tool integration. The backend enables AI agents to execute code, browse the web, manage files, delegate tasks to subagents, and retain context across conversations - all in isolated, per-thread environments.
+
+---
+
+## Architecture
+
+```
+                        ┌──────────────────────────────────────┐
+                        │          Nginx (Port 2026)           │
+                        │      Unified reverse proxy           │
+                        └───────┬──────────────────┬───────────┘
+                                │                  │
+              /api/langgraph/*  │                  │  /api/* (other)
+                                ▼                  ▼
+               ┌────────────────────┐  ┌────────────────────────┐
+               │ LangGraph Server   │  │   Gateway API (8001)   │
+               │    (Port 2024)     │  │   FastAPI REST         │
+               │                    │  │                        │
+               │ ┌────────────────┐ │  │ Models, MCP, Skills,   │
+               │ │  Lead Agent    │ │  │ Memory, Uploads,       │
+               │ │  ┌──────────┐  │ │  │ Artifacts              │
+               │ │  │Middleware│  │ │  └────────────────────────┘
+               │ │  │  Chain   │  │ │
+               │ │  └──────────┘  │ │
+               │ │  ┌──────────┐  │ │
+               │ │  │  Tools   │  │ │
+               │ │  └──────────┘  │ │
+               │ │  ┌──────────┐  │ │
+               │ │  │Subagents │  │ │
+               │ │  └──────────┘  │ │
+               │ └────────────────┘ │
+               └────────────────────┘
+```
+
+**Request Routing** (via Nginx):
+- `/api/langgraph/*` → LangGraph Server - agent interactions, threads, streaming
+- `/api/*` (other) → Gateway API - models, MCP, skills, memory, artifacts, uploads, thread-local cleanup
+- `/` (non-API) → Frontend - Next.js web interface
+
+---
+
+## Core Components
+
+### Lead Agent
+
+The single LangGraph agent (`lead_agent`) is the runtime entry point, created via `make_lead_agent(config)`. It combines:
+
+- **Dynamic model selection** with thinking and vision support
+- **Middleware chain** for cross-cutting concerns (9 middlewares)
+- **Tool system** with sandbox, MCP, community, and built-in tools
+- **Subagent delegation** for parallel task execution
+- **System prompt** with skills injection, memory context, and working directory guidance
+
+### Middleware Chain
+
+Middlewares execute in strict order, each handling a specific concern:
+
+| # | Middleware | Purpose |
+|---|-----------|---------|
+| 1 | **ThreadDataMiddleware** | Creates per-thread isolated directories (workspace, uploads, outputs) |
+| 2 | **UploadsMiddleware** | Injects newly uploaded files into conversation context |
+| 3 | **SandboxMiddleware** | Acquires sandbox environment for code execution |
+| 4 | **SummarizationMiddleware** | Reduces context when approaching token limits (optional) |
+| 5 | **TodoListMiddleware** | Tracks multi-step tasks in plan mode (optional) |
+| 6 | **TitleMiddleware** | Auto-generates conversation titles after first exchange |
+| 7 | **MemoryMiddleware** | Queues conversations for async memory extraction |
+| 8 | **ViewImageMiddleware** | Injects image data for vision-capable models (conditional) |
+| 9 | **ClarificationMiddleware** | Intercepts clarification requests and interrupts execution (must be last) |
+
+### Sandbox System
+
+Per-thread isolated execution with virtual path translation:
+
+- **Abstract interface**: `execute_command`, `read_file`, `write_file`, `list_dir`
+- **Providers**: `LocalSandboxProvider` (filesystem) and `AioSandboxProvider` (Docker, in community/)
+- **Virtual paths**: `/mnt/user-data/{workspace,uploads,outputs}` → thread-specific physical directories
+- **Skills path**: `/mnt/skills` → `deer-flow/skills/` directory
+- **Skills loading**: Recursively discovers nested `SKILL.md` files under `skills/{public,custom}` and preserves nested container paths
+- **File-write safety**: `str_replace` serializes read-modify-write per `(sandbox.id, path)` so isolated sandboxes keep concurrency even when virtual paths match
+- **Tools**: `bash`, `ls`, `read_file`, `write_file`, `str_replace` (`bash` is disabled by default when using `LocalSandboxProvider`; use `AioSandboxProvider` for isolated shell access)
+
+### Subagent System
+
+Async task delegation with concurrent execution:
+
+- **Built-in agents**: `general-purpose` (full toolset) and `bash` (command specialist, exposed only when shell access is available)
+- **Concurrency**: Max 3 subagents per turn, 15-minute timeout
+- **Execution**: Background thread pools with status tracking and SSE events
+- **Flow**: Agent calls `task()` tool → executor runs subagent in background → polls for completion → returns result
+
+### Memory System
+
+LLM-powered persistent context retention across conversations:
+
+- **Automatic extraction**: Analyzes conversations for user context, facts, and preferences
+- **Structured storage**: User context (work, personal, top-of-mind), history, and confidence-scored facts
+- **Debounced updates**: Batches updates to minimize LLM calls (configurable wait time)
+- **System prompt injection**: Top facts + context injected into agent prompts
+- **Storage**: JSON file with mtime-based cache invalidation
+
+### Tool Ecosystem
+
+| Category | Tools |
+|----------|-------|
+| **Sandbox** | `bash`, `ls`, `read_file`, `write_file`, `str_replace` |
+| **Built-in** | `present_files`, `ask_clarification`, `view_image`, `task` (subagent) |
+| **Community** | Tavily (web search), Jina AI (web fetch), Firecrawl (scraping), DuckDuckGo (image search) |
+| **MCP** | Any Model Context Protocol server (stdio, SSE, HTTP transports) |
+| **Skills** | Domain-specific workflows injected via system prompt |
+
+### Gateway API
+
+FastAPI application providing REST endpoints for frontend integration:
+
+| Route | Purpose |
+|-------|---------|
+| `GET /api/models` | List available LLM models |
+| `GET/PUT /api/mcp/config` | Manage MCP server configurations |
+| `GET/PUT /api/skills` | List and manage skills |
+| `POST /api/skills/install` | Install skill from `.skill` archive |
+| `GET /api/memory` | Retrieve memory data |
+| `POST /api/memory/reload` | Force memory reload |
+| `GET /api/memory/config` | Memory configuration |
+| `GET /api/memory/status` | Combined config + data |
+| `POST /api/threads/{id}/uploads` | Upload files (auto-converts PDF/PPT/Excel/Word to Markdown, rejects directory paths) |
+| `GET /api/threads/{id}/uploads/list` | List uploaded files |
+| `DELETE /api/threads/{id}` | Delete DeerFlow-managed local thread data after LangGraph thread deletion; unexpected failures are logged server-side and return a generic 500 detail |
+| `GET /api/threads/{id}/artifacts/{path}` | Serve generated artifacts |
+
+### IM Channels
+
+The IM bridge supports Feishu, Slack, and Telegram. Slack and Telegram still use the final `runs.wait()` response path, while Feishu now streams through `runs.stream(["messages-tuple", "values"])` and updates a single in-thread card in place.
+
+For Feishu card updates, DeerFlow stores the running card's `message_id` per inbound message and patches that same card until the run finishes, preserving the existing `OK` / `DONE` reaction flow.
+
+---
+
+## Quick Start
+
+### Prerequisites
+
+- Python 3.12+
+- [uv](https://docs.astral.sh/uv/) package manager
+- API keys for your chosen LLM provider
+
+### Installation
+
+```bash
+cd deer-flow
+
+# Copy configuration files
+cp config.example.yaml config.yaml
+
+# Install backend dependencies
+cd backend
+make install
+```
+
+### Configuration
+
+Edit `config.yaml` in the project root:
+
+```yaml
+models:
+  - name: gpt-4o
+    display_name: GPT-4o
+    use: langchain_openai:ChatOpenAI
+    model: gpt-4o
+    api_key: $OPENAI_API_KEY
+    supports_thinking: false
+    supports_vision: true
+
+  - name: gpt-5-responses
+    display_name: GPT-5 (Responses API)
+    use: langchain_openai:ChatOpenAI
+    model: gpt-5
+    api_key: $OPENAI_API_KEY
+    use_responses_api: true
+    output_version: responses/v1
+    supports_vision: true
+```
+
+Set your API keys:
+
+```bash
+export OPENAI_API_KEY="your-api-key-here"
+```
+
+### Running
+
+**Full Application** (from project root):
+
+```bash
+make dev  # Starts LangGraph + Gateway + Frontend + Nginx
+```
+
+Access at: http://localhost:2026
+
+**Backend Only** (from backend directory):
+
+```bash
+# Terminal 1: LangGraph server
+make dev
+
+# Terminal 2: Gateway API
+make gateway
+```
+
+Direct access: LangGraph at http://localhost:2024, Gateway at http://localhost:8001
+
+---
+
+## Project Structure
+
+```
+backend/
+├── src/
+│   ├── agents/                  # Agent system
+│   │   ├── lead_agent/         # Main agent (factory, prompts)
+│   │   ├── middlewares/        # 9 middleware components
+│   │   ├── memory/             # Memory extraction & storage
+│   │   └── thread_state.py    # ThreadState schema
+│   ├── gateway/                # FastAPI Gateway API
+│   │   ├── app.py             # Application setup
+│   │   └── routers/           # 6 route modules
+│   ├── sandbox/                # Sandbox execution
+│   │   ├── local/             # Local filesystem provider
+│   │   ├── sandbox.py         # Abstract interface
+│   │   ├── tools.py           # bash, ls, read/write/str_replace
+│   │   └── middleware.py      # Sandbox lifecycle
+│   ├── subagents/              # Subagent delegation
+│   │   ├── builtins/          # general-purpose, bash agents
+│   │   ├── executor.py        # Background execution engine
+│   │   └── registry.py        # Agent registry
+│   ├── tools/builtins/         # Built-in tools
+│   ├── mcp/                    # MCP protocol integration
+│   ├── models/                 # Model factory
+│   ├── skills/                 # Skill discovery & loading
+│   ├── config/                 # Configuration system
+│   ├── community/              # Community tools & providers
+│   ├── reflection/             # Dynamic module loading
+│   └── utils/                  # Utilities
+├── docs/                       # Documentation
+├── tests/                      # Test suite
+├── langgraph.json              # LangGraph server configuration
+├── pyproject.toml              # Python dependencies
+├── Makefile                    # Development commands
+└── Dockerfile                  # Container build
+```
+
+---
+
+## Configuration
+
+### Main Configuration (`config.yaml`)
+
+Place in project root. Config values starting with `$` resolve as environment variables.
+
+Key sections:
+- `models` - LLM configurations with class paths, API keys, thinking/vision flags
+- `tools` - Tool definitions with module paths and groups
+- `tool_groups` - Logical tool groupings
+- `sandbox` - Execution environment provider
+- `skills` - Skills directory paths
+- `title` - Auto-title generation settings
+- `summarization` - Context summarization settings
+- `subagents` - Subagent system (enabled/disabled)
+- `memory` - Memory system settings (enabled, storage, debounce, facts limits)
+
+Provider note:
+- `models[*].use` references provider classes by module path (for example `langchain_openai:ChatOpenAI`).
+- If a provider module is missing, DeerFlow now returns an actionable error with install guidance (for example `uv add langchain-google-genai`).
+
+### Extensions Configuration (`extensions_config.json`)
+
+MCP servers and skill states in a single file:
+
+```json
+{
+  "mcpServers": {
+    "github": {
+      "enabled": true,
+      "type": "stdio",
+      "command": "npx",
+      "args": ["-y", "@modelcontextprotocol/server-github"],
+      "env": {"GITHUB_TOKEN": "$GITHUB_TOKEN"}
+    },
+    "secure-http": {
+      "enabled": true,
+      "type": "http",
+      "url": "https://api.example.com/mcp",
+      "oauth": {
+        "enabled": true,
+        "token_url": "https://auth.example.com/oauth/token",
+        "grant_type": "client_credentials",
+        "client_id": "$MCP_OAUTH_CLIENT_ID",
+        "client_secret": "$MCP_OAUTH_CLIENT_SECRET"
+      }
+    }
+  },
+  "skills": {
+    "pdf-processing": {"enabled": true}
+  }
+}
+```
+
+### Environment Variables
+
+- `DEER_FLOW_CONFIG_PATH` - Override config.yaml location
+- `DEER_FLOW_EXTENSIONS_CONFIG_PATH` - Override extensions_config.json location
+- Model API keys: `OPENAI_API_KEY`, `ANTHROPIC_API_KEY`, `DEEPSEEK_API_KEY`, etc.
+- Tool API keys: `TAVILY_API_KEY`, `GITHUB_TOKEN`, etc.
+
+### LangSmith Tracing
+
+DeerFlow has built-in [LangSmith](https://smith.langchain.com) integration for observability. When enabled, all LLM calls, agent runs, tool executions, and middleware processing are traced and visible in the LangSmith dashboard.
+
+**Setup:**
+
+1. Sign up at [smith.langchain.com](https://smith.langchain.com) and create a project.
+2. Add the following to your `.env` file in the project root:
+
+```bash
+LANGSMITH_TRACING=true
+LANGSMITH_ENDPOINT=https://api.smith.langchain.com
+LANGSMITH_API_KEY=lsv2_pt_xxxxxxxxxxxxxxxx
+LANGSMITH_PROJECT=xxx
+```
+
+**Legacy variables:** The `LANGCHAIN_TRACING_V2`, `LANGCHAIN_API_KEY`, `LANGCHAIN_PROJECT`, and `LANGCHAIN_ENDPOINT` variables are also supported for backward compatibility. `LANGSMITH_*` variables take precedence when both are set.
+
+### Langfuse Tracing
+
+DeerFlow also supports [Langfuse](https://langfuse.com) observability for LangChain-compatible runs.
+
+Add the following to your `.env` file:
+
+```bash
+LANGFUSE_TRACING=true
+LANGFUSE_PUBLIC_KEY=pk-lf-xxxxxxxxxxxxxxxx
+LANGFUSE_SECRET_KEY=sk-lf-xxxxxxxxxxxxxxxx
+LANGFUSE_BASE_URL=https://cloud.langfuse.com
+```
+
+If you are using a self-hosted Langfuse deployment, set `LANGFUSE_BASE_URL` to your Langfuse host.
+
+### Dual Provider Behavior
+
+If both LangSmith and Langfuse are enabled, DeerFlow initializes and attaches both callbacks so the same run data is reported to both systems.
+
+If a provider is explicitly enabled but required credentials are missing, or the provider callback cannot be initialized, DeerFlow raises an error when tracing is initialized during model creation instead of silently disabling tracing.
+
+**Docker:** In `docker-compose.yaml`, tracing is disabled by default (`LANGSMITH_TRACING=false`). Set `LANGSMITH_TRACING=true` and/or `LANGFUSE_TRACING=true` in your `.env`, together with the required credentials, to enable tracing in containerized deployments.
+
+---
+
+## Development
+
+### Commands
+
+```bash
+make install    # Install dependencies
+make dev        # Run LangGraph server (port 2024)
+make gateway    # Run Gateway API (port 8001)
+make lint       # Run linter (ruff)
+make format     # Format code (ruff)
+```
+
+### Code Style
+
+- **Linter/Formatter**: `ruff`
+- **Line length**: 240 characters
+- **Python**: 3.12+ with type hints
+- **Quotes**: Double quotes
+- **Indentation**: 4 spaces
+
+### Testing
+
+```bash
+uv run pytest
+```
+
+---
+
+## Technology Stack
+
+- **LangGraph** (1.0.6+) - Agent framework and multi-agent orchestration
+- **LangChain** (1.2.3+) - LLM abstractions and tool system
+- **FastAPI** (0.115.0+) - Gateway REST API
+- **langchain-mcp-adapters** - Model Context Protocol support
+- **agent-sandbox** - Sandboxed code execution
+- **markitdown** - Multi-format document conversion
+- **tavily-python** / **firecrawl-py** - Web search and scraping
+
+---
+
+## Documentation
+
+- [Configuration Guide](docs/CONFIGURATION.md)
+- [Architecture Details](docs/ARCHITECTURE.md)
+- [API Reference](docs/API.md)
+- [File Upload](docs/FILE_UPLOAD.md)
+- [Path Examples](docs/PATH_EXAMPLES.md)
+- [Context Summarization](docs/summarization.md)
+- [Plan Mode](docs/plan_mode_usage.md)
+- [Setup Guide](docs/SETUP.md)
+
+---
+
+## License
+
+See the [LICENSE](../LICENSE) file in the project root.
+
+## Contributing
+
+See [CONTRIBUTING.md](CONTRIBUTING.md) for contribution guidelines.

backend/app/channels/__init__.py

@@ -0,0 +1,16 @@
+"""IM Channel integration for DeerFlow.
+
+Provides a pluggable channel system that connects external messaging platforms
+(Feishu/Lark, Slack, Telegram) to the DeerFlow agent via the ChannelManager,
+which uses ``langgraph-sdk`` to communicate with the underlying LangGraph Server.
+"""
+
+from app.channels.base import Channel
+from app.channels.message_bus import InboundMessage, MessageBus, OutboundMessage
+
+__all__ = [
+    "Channel",
+    "InboundMessage",
+    "MessageBus",
+    "OutboundMessage",
+]

backend/app/channels/base.py

@@ -0,0 +1,126 @@
+"""Abstract base class for IM channels."""
+
+from __future__ import annotations
+
+import logging
+from abc import ABC, abstractmethod
+from typing import Any
+
+from app.channels.message_bus import InboundMessage, InboundMessageType, MessageBus, OutboundMessage, ResolvedAttachment
+
+logger = logging.getLogger(__name__)
+
+
+class Channel(ABC):
+    """Base class for all IM channel implementations.
+
+    Each channel connects to an external messaging platform and:
+    1. Receives messages, wraps them as InboundMessage, publishes to the bus.
+    2. Subscribes to outbound messages and sends replies back to the platform.
+
+    Subclasses must implement ``start``, ``stop``, and ``send``.
+    """
+
+    def __init__(self, name: str, bus: MessageBus, config: dict[str, Any]) -> None:
+        self.name = name
+        self.bus = bus
+        self.config = config
+        self._running = False
+
+    @property
+    def is_running(self) -> bool:
+        return self._running
+
+    # -- lifecycle ---------------------------------------------------------
+
+    @abstractmethod
+    async def start(self) -> None:
+        """Start listening for messages from the external platform."""
+
+    @abstractmethod
+    async def stop(self) -> None:
+        """Gracefully stop the channel."""
+
+    # -- outbound ----------------------------------------------------------
+
+    @abstractmethod
+    async def send(self, msg: OutboundMessage) -> None:
+        """Send a message back to the external platform.
+
+        The implementation should use ``msg.chat_id`` and ``msg.thread_ts``
+        to route the reply to the correct conversation/thread.
+        """
+
+    async def send_file(self, msg: OutboundMessage, attachment: ResolvedAttachment) -> bool:
+        """Upload a single file attachment to the platform.
+
+        Returns True if the upload succeeded, False otherwise.
+        Default implementation returns False (no file upload support).
+        """
+        return False
+
+    # -- helpers -----------------------------------------------------------
+
+    def _make_inbound(
+        self,
+        chat_id: str,
+        user_id: str,
+        text: str,
+        *,
+        msg_type: InboundMessageType = InboundMessageType.CHAT,
+        thread_ts: str | None = None,
+        files: list[dict[str, Any]] | None = None,
+        metadata: dict[str, Any] | None = None,
+    ) -> InboundMessage:
+        """Convenience factory for creating InboundMessage instances."""
+        return InboundMessage(
+            channel_name=self.name,
+            chat_id=chat_id,
+            user_id=user_id,
+            text=text,
+            msg_type=msg_type,
+            thread_ts=thread_ts,
+            files=files or [],
+            metadata=metadata or {},
+        )
+
+    async def _on_outbound(self, msg: OutboundMessage) -> None:
+        """Outbound callback registered with the bus.
+
+        Only forwards messages targeted at this channel.
+        Sends the text message first, then uploads any file attachments.
+        File uploads are skipped entirely when the text send fails to avoid
+        partial deliveries (files without accompanying text).
+        """
+        if msg.channel_name == self.name:
+            try:
+                await self.send(msg)
+            except Exception:
+                logger.exception("Failed to send outbound message on channel %s", self.name)
+                return  # Do not attempt file uploads when the text message failed
+
+            for attachment in msg.attachments:
+                try:
+                    success = await self.send_file(msg, attachment)
+                    if not success:
+                        logger.warning("[%s] file upload skipped for %s", self.name, attachment.filename)
+                except Exception:
+                    logger.exception("[%s] failed to upload file %s", self.name, attachment.filename)
+
+    async def receive_file(self, msg: InboundMessage, thread_id: str) -> InboundMessage:
+        """
+        Optionally process and materialize inbound file attachments for this channel.
+
+        By default, this method does nothing and simply returns the original message.
+        Subclasses (e.g. FeishuChannel) may override this to download files (images, documents, etc)
+        referenced in msg.files, save them to the sandbox, and update msg.text to include
+        the sandbox file paths for downstream model consumption.
+
+        Args:
+            msg: The inbound message, possibly containing file metadata in msg.files.
+            thread_id: The resolved DeerFlow thread ID for sandbox path context.
+
+        Returns:
+            The (possibly modified) InboundMessage, with text and/or files updated as needed.
+        """
+        return msg

backend/app/channels/commands.py

@@ -0,0 +1,20 @@
+"""Shared command definitions used by all channel implementations.
+
+Keeping the authoritative command set in one place ensures that channel
+parsers (e.g. Feishu) and the ChannelManager dispatcher stay in sync
+automatically — adding or removing a command here is the single edit
+required.
+"""
+
+from __future__ import annotations
+
+KNOWN_CHANNEL_COMMANDS: frozenset[str] = frozenset(
+    {
+        "/bootstrap",
+        "/new",
+        "/status",
+        "/models",
+        "/memory",
+        "/help",
+    }
+)

backend/app/channels/feishu.py

@@ -0,0 +1,692 @@
+"""Feishu/Lark channel — connects to Feishu via WebSocket (no public IP needed)."""
+
+from __future__ import annotations
+
+import asyncio
+import json
+import logging
+import re
+import threading
+from typing import Any, Literal
+
+from app.channels.base import Channel
+from app.channels.commands import KNOWN_CHANNEL_COMMANDS
+from app.channels.message_bus import InboundMessage, InboundMessageType, MessageBus, OutboundMessage, ResolvedAttachment
+from deerflow.config.paths import VIRTUAL_PATH_PREFIX, get_paths
+from deerflow.sandbox.sandbox_provider import get_sandbox_provider
+
+logger = logging.getLogger(__name__)
+
+
+def _is_feishu_command(text: str) -> bool:
+    if not text.startswith("/"):
+        return False
+    return text.split(maxsplit=1)[0].lower() in KNOWN_CHANNEL_COMMANDS
+
+
+class FeishuChannel(Channel):
+    """Feishu/Lark IM channel using the ``lark-oapi`` WebSocket client.
+
+    Configuration keys (in ``config.yaml`` under ``channels.feishu``):
+        - ``app_id``: Feishu app ID.
+        - ``app_secret``: Feishu app secret.
+        - ``verification_token``: (optional) Event verification token.
+
+    The channel uses WebSocket long-connection mode so no public IP is required.
+
+    Message flow:
+        1. User sends a message → bot adds "OK" emoji reaction
+        2. Bot replies in thread: "Working on it......"
+        3. Agent processes the message and returns a result
+        4. Bot replies in thread with the result
+        5. Bot adds "DONE" emoji reaction to the original message
+    """
+
+    def __init__(self, bus: MessageBus, config: dict[str, Any]) -> None:
+        super().__init__(name="feishu", bus=bus, config=config)
+        self._thread: threading.Thread | None = None
+        self._main_loop: asyncio.AbstractEventLoop | None = None
+        self._api_client = None
+        self._CreateMessageReactionRequest = None
+        self._CreateMessageReactionRequestBody = None
+        self._Emoji = None
+        self._PatchMessageRequest = None
+        self._PatchMessageRequestBody = None
+        self._background_tasks: set[asyncio.Task] = set()
+        self._running_card_ids: dict[str, str] = {}
+        self._running_card_tasks: dict[str, asyncio.Task] = {}
+        self._CreateFileRequest = None
+        self._CreateFileRequestBody = None
+        self._CreateImageRequest = None
+        self._CreateImageRequestBody = None
+        self._GetMessageResourceRequest = None
+        self._thread_lock = threading.Lock()
+
+    async def start(self) -> None:
+        if self._running:
+            return
+
+        try:
+            import lark_oapi as lark
+            from lark_oapi.api.im.v1 import (
+                CreateFileRequest,
+                CreateFileRequestBody,
+                CreateImageRequest,
+                CreateImageRequestBody,
+                CreateMessageReactionRequest,
+                CreateMessageReactionRequestBody,
+                CreateMessageRequest,
+                CreateMessageRequestBody,
+                Emoji,
+                GetMessageResourceRequest,
+                PatchMessageRequest,
+                PatchMessageRequestBody,
+                ReplyMessageRequest,
+                ReplyMessageRequestBody,
+            )
+        except ImportError:
+            logger.error("lark-oapi is not installed. Install it with: uv add lark-oapi")
+            return
+
+        self._lark = lark
+        self._CreateMessageRequest = CreateMessageRequest
+        self._CreateMessageRequestBody = CreateMessageRequestBody
+        self._ReplyMessageRequest = ReplyMessageRequest
+        self._ReplyMessageRequestBody = ReplyMessageRequestBody
+        self._CreateMessageReactionRequest = CreateMessageReactionRequest
+        self._CreateMessageReactionRequestBody = CreateMessageReactionRequestBody
+        self._Emoji = Emoji
+        self._PatchMessageRequest = PatchMessageRequest
+        self._PatchMessageRequestBody = PatchMessageRequestBody
+        self._CreateFileRequest = CreateFileRequest
+        self._CreateFileRequestBody = CreateFileRequestBody
+        self._CreateImageRequest = CreateImageRequest
+        self._CreateImageRequestBody = CreateImageRequestBody
+        self._GetMessageResourceRequest = GetMessageResourceRequest
+
+        app_id = self.config.get("app_id", "")
+        app_secret = self.config.get("app_secret", "")
+        domain = self.config.get("domain", "https://open.feishu.cn")
+
+        if not app_id or not app_secret:
+            logger.error("Feishu channel requires app_id and app_secret")
+            return
+
+        self._api_client = lark.Client.builder().app_id(app_id).app_secret(app_secret).domain(domain).build()
+        logger.info("[Feishu] using domain: %s", domain)
+        self._main_loop = asyncio.get_event_loop()
+
+        self._running = True
+        self.bus.subscribe_outbound(self._on_outbound)
+
+        # Both ws.Client construction and start() must happen in a dedicated
+        # thread with its own event loop.  lark-oapi caches the running loop
+        # at construction time and later calls loop.run_until_complete(),
+        # which conflicts with an already-running uvloop.
+        self._thread = threading.Thread(
+            target=self._run_ws,
+            args=(app_id, app_secret, domain),
+            daemon=True,
+        )
+        self._thread.start()
+        logger.info("Feishu channel started")
+
+    def _run_ws(self, app_id: str, app_secret: str, domain: str) -> None:
+        """Construct and run the lark WS client in a thread with a fresh event loop.
+
+        The lark-oapi SDK captures a module-level event loop at import time
+        (``lark_oapi.ws.client.loop``).  When uvicorn uses uvloop, that
+        captured loop is the *main* thread's uvloop — which is already
+        running, so ``loop.run_until_complete()`` inside ``Client.start()``
+        raises ``RuntimeError``.
+
+        We work around this by creating a plain asyncio event loop for this
+        thread and patching the SDK's module-level reference before calling
+        ``start()``.
+        """
+        loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
+        try:
+            import lark_oapi as lark
+            import lark_oapi.ws.client as _ws_client_mod
+
+            # Replace the SDK's module-level loop so Client.start() uses
+            # this thread's (non-running) event loop instead of the main
+            # thread's uvloop.
+            _ws_client_mod.loop = loop
+
+            event_handler = lark.EventDispatcherHandler.builder("", "").register_p2_im_message_receive_v1(self._on_message).build()
+            ws_client = lark.ws.Client(
+                app_id=app_id,
+                app_secret=app_secret,
+                event_handler=event_handler,
+                log_level=lark.LogLevel.INFO,
+                domain=domain,
+            )
+            ws_client.start()
+        except Exception:
+            if self._running:
+                logger.exception("Feishu WebSocket error")
+
+    async def stop(self) -> None:
+        self._running = False
+        self.bus.unsubscribe_outbound(self._on_outbound)
+        for task in list(self._background_tasks):
+            task.cancel()
+        self._background_tasks.clear()
+        for task in list(self._running_card_tasks.values()):
+            task.cancel()
+        self._running_card_tasks.clear()
+        if self._thread:
+            self._thread.join(timeout=5)
+            self._thread = None
+        logger.info("Feishu channel stopped")
+
+    async def send(self, msg: OutboundMessage, *, _max_retries: int = 3) -> None:
+        if not self._api_client:
+            logger.warning("[Feishu] send called but no api_client available")
+            return
+
+        logger.info(
+            "[Feishu] sending reply: chat_id=%s, thread_ts=%s, text_len=%d",
+            msg.chat_id,
+            msg.thread_ts,
+            len(msg.text),
+        )
+
+        last_exc: Exception | None = None
+        for attempt in range(_max_retries):
+            try:
+                await self._send_card_message(msg)
+                return  # success
+            except Exception as exc:
+                last_exc = exc
+                if attempt < _max_retries - 1:
+                    delay = 2**attempt  # 1s, 2s
+                    logger.warning(
+                        "[Feishu] send failed (attempt %d/%d), retrying in %ds: %s",
+                        attempt + 1,
+                        _max_retries,
+                        delay,
+                        exc,
+                    )
+                    await asyncio.sleep(delay)
+
+        logger.error("[Feishu] send failed after %d attempts: %s", _max_retries, last_exc)
+        if last_exc is None:
+            raise RuntimeError("Feishu send failed without an exception from any attempt")
+        raise last_exc
+
+    async def send_file(self, msg: OutboundMessage, attachment: ResolvedAttachment) -> bool:
+        if not self._api_client:
+            return False
+
+        # Check size limits (image: 10MB, file: 30MB)
+        if attachment.is_image and attachment.size > 10 * 1024 * 1024:
+            logger.warning("[Feishu] image too large (%d bytes), skipping: %s", attachment.size, attachment.filename)
+            return False
+        if not attachment.is_image and attachment.size > 30 * 1024 * 1024:
+            logger.warning("[Feishu] file too large (%d bytes), skipping: %s", attachment.size, attachment.filename)
+            return False
+
+        try:
+            if attachment.is_image:
+                file_key = await self._upload_image(attachment.actual_path)
+                msg_type = "image"
+                content = json.dumps({"image_key": file_key})
+            else:
+                file_key = await self._upload_file(attachment.actual_path, attachment.filename)
+                msg_type = "file"
+                content = json.dumps({"file_key": file_key})
+
+            if msg.thread_ts:
+                request = self._ReplyMessageRequest.builder().message_id(msg.thread_ts).request_body(self._ReplyMessageRequestBody.builder().msg_type(msg_type).content(content).reply_in_thread(True).build()).build()
+                await asyncio.to_thread(self._api_client.im.v1.message.reply, request)
+            else:
+                request = self._CreateMessageRequest.builder().receive_id_type("chat_id").request_body(self._CreateMessageRequestBody.builder().receive_id(msg.chat_id).msg_type(msg_type).content(content).build()).build()
+                await asyncio.to_thread(self._api_client.im.v1.message.create, request)
+
+            logger.info("[Feishu] file sent: %s (type=%s)", attachment.filename, msg_type)
+            return True
+        except Exception:
+            logger.exception("[Feishu] failed to upload/send file: %s", attachment.filename)
+            return False
+
+    async def _upload_image(self, path) -> str:
+        """Upload an image to Feishu and return the image_key."""
+        with open(str(path), "rb") as f:
+            request = self._CreateImageRequest.builder().request_body(self._CreateImageRequestBody.builder().image_type("message").image(f).build()).build()
+            response = await asyncio.to_thread(self._api_client.im.v1.image.create, request)
+        if not response.success():
+            raise RuntimeError(f"Feishu image upload failed: code={response.code}, msg={response.msg}")
+        return response.data.image_key
+
+    async def _upload_file(self, path, filename: str) -> str:
+        """Upload a file to Feishu and return the file_key."""
+        suffix = path.suffix.lower() if hasattr(path, "suffix") else ""
+        if suffix in (".xls", ".xlsx", ".csv"):
+            file_type = "xls"
+        elif suffix in (".ppt", ".pptx"):
+            file_type = "ppt"
+        elif suffix == ".pdf":
+            file_type = "pdf"
+        elif suffix in (".doc", ".docx"):
+            file_type = "doc"
+        else:
+            file_type = "stream"
+
+        with open(str(path), "rb") as f:
+            request = self._CreateFileRequest.builder().request_body(self._CreateFileRequestBody.builder().file_type(file_type).file_name(filename).file(f).build()).build()
+            response = await asyncio.to_thread(self._api_client.im.v1.file.create, request)
+        if not response.success():
+            raise RuntimeError(f"Feishu file upload failed: code={response.code}, msg={response.msg}")
+        return response.data.file_key
+
+    async def receive_file(self, msg: InboundMessage, thread_id: str) -> InboundMessage:
+        """Download a Feishu file into the thread uploads directory.
+
+        Returns the sandbox virtual path when the image is persisted successfully.
+        """
+        if not msg.thread_ts:
+            logger.warning("[Feishu] received file message without thread_ts, cannot associate with conversation: %s", msg)
+            return msg
+        files = msg.files
+        if not files:
+            logger.warning("[Feishu] received message with no files: %s", msg)
+            return msg
+        text = msg.text
+        for file in files:
+            if file.get("image_key"):
+                virtual_path = await self._receive_single_file(msg.thread_ts, file["image_key"], "image", thread_id)
+                text = text.replace("[image]", virtual_path, 1)
+            elif file.get("file_key"):
+                virtual_path = await self._receive_single_file(msg.thread_ts, file["file_key"], "file", thread_id)
+                text = text.replace("[file]", virtual_path, 1)
+        msg.text = text
+        return msg
+
+    async def _receive_single_file(self, message_id: str, file_key: str, type: Literal["image", "file"], thread_id: str) -> str:
+        request = self._GetMessageResourceRequest.builder().message_id(message_id).file_key(file_key).type(type).build()
+
+        def inner():
+            return self._api_client.im.v1.message_resource.get(request)
+
+        try:
+            response = await asyncio.to_thread(inner)
+        except Exception:
+            logger.exception("[Feishu] resource get request failed for resource_key=%s type=%s", file_key, type)
+            return f"Failed to obtain the [{type}]"
+
+        if not response.success():
+            logger.warning(
+                "[Feishu] resource get failed: resource_key=%s, type=%s, code=%s, msg=%s, log_id=%s ",
+                file_key,
+                type,
+                response.code,
+                response.msg,
+                response.get_log_id(),
+            )
+            return f"Failed to obtain the [{type}]"
+
+        image_stream = getattr(response, "file", None)
+        if image_stream is None:
+            logger.warning("[Feishu] resource get returned no file stream: resource_key=%s, type=%s", file_key, type)
+            return f"Failed to obtain the [{type}]"
+
+        try:
+            content: bytes = await asyncio.to_thread(image_stream.read)
+        except Exception:
+            logger.exception("[Feishu] failed to read resource stream: resource_key=%s, type=%s", file_key, type)
+            return f"Failed to obtain the [{type}]"
+
+        if not content:
+            logger.warning("[Feishu] empty resource content: resource_key=%s, type=%s", file_key, type)
+            return f"Failed to obtain the [{type}]"
+
+        paths = get_paths()
+        paths.ensure_thread_dirs(thread_id)
+        uploads_dir = paths.sandbox_uploads_dir(thread_id).resolve()
+
+        ext = "png" if type == "image" else "bin"
+        raw_filename = getattr(response, "file_name", "") or f"feishu_{file_key[-12:]}.{ext}"
+
+        # Sanitize filename: preserve extension, replace path chars in name part
+        if "." in raw_filename:
+            name_part, ext = raw_filename.rsplit(".", 1)
+            name_part = re.sub(r"[./\\]", "_", name_part)
+            filename = f"{name_part}.{ext}"
+        else:
+            filename = re.sub(r"[./\\]", "_", raw_filename)
+        resolved_target = uploads_dir / filename
+
+        def down_load():
+            # use thread_lock to avoid filename conflicts when writing
+            with self._thread_lock:
+                resolved_target.write_bytes(content)
+
+        try:
+            await asyncio.to_thread(down_load)
+        except Exception:
+            logger.exception("[Feishu] failed to persist downloaded resource: %s, type=%s", resolved_target, type)
+            return f"Failed to obtain the [{type}]"
+
+        virtual_path = f"{VIRTUAL_PATH_PREFIX}/uploads/{resolved_target.name}"
+
+        try:
+            sandbox_provider = get_sandbox_provider()
+            sandbox_id = sandbox_provider.acquire(thread_id)
+            if sandbox_id != "local":
+                sandbox = sandbox_provider.get(sandbox_id)
+                if sandbox is None:
+                    logger.warning("[Feishu] sandbox not found for thread_id=%s", thread_id)
+                    return f"Failed to obtain the [{type}]"
+                sandbox.update_file(virtual_path, content)
+        except Exception:
+            logger.exception("[Feishu] failed to sync resource into non-local sandbox: %s", virtual_path)
+            return f"Failed to obtain the [{type}]"
+
+        logger.info("[Feishu] downloaded resource mapped: file_key=%s -> %s", file_key, virtual_path)
+        return virtual_path
+
+    # -- message formatting ------------------------------------------------
+
+    @staticmethod
+    def _build_card_content(text: str) -> str:
+        """Build a Feishu interactive card with markdown content.
+
+        Feishu's interactive card format natively renders markdown, including
+        headers, bold/italic, code blocks, lists, and links.
+        """
+        card = {
+            "config": {"wide_screen_mode": True, "update_multi": True},
+            "elements": [{"tag": "markdown", "content": text}],
+        }
+        return json.dumps(card)
+
+    # -- reaction helpers --------------------------------------------------
+
+    async def _add_reaction(self, message_id: str, emoji_type: str = "THUMBSUP") -> None:
+        """Add an emoji reaction to a message."""
+        if not self._api_client or not self._CreateMessageReactionRequest:
+            return
+        try:
+            request = self._CreateMessageReactionRequest.builder().message_id(message_id).request_body(self._CreateMessageReactionRequestBody.builder().reaction_type(self._Emoji.builder().emoji_type(emoji_type).build()).build()).build()
+            await asyncio.to_thread(self._api_client.im.v1.message_reaction.create, request)
+            logger.info("[Feishu] reaction '%s' added to message %s", emoji_type, message_id)
+        except Exception:
+            logger.exception("[Feishu] failed to add reaction '%s' to message %s", emoji_type, message_id)
+
+    async def _reply_card(self, message_id: str, text: str) -> str | None:
+        """Reply with an interactive card and return the created card message ID."""
+        if not self._api_client:
+            return None
+
+        content = self._build_card_content(text)
+        request = self._ReplyMessageRequest.builder().message_id(message_id).request_body(self._ReplyMessageRequestBody.builder().msg_type("interactive").content(content).reply_in_thread(True).build()).build()
+        response = await asyncio.to_thread(self._api_client.im.v1.message.reply, request)
+        response_data = getattr(response, "data", None)
+        return getattr(response_data, "message_id", None)
+
+    async def _create_card(self, chat_id: str, text: str) -> None:
+        """Create a new card message in the target chat."""
+        if not self._api_client:
+            return
+
+        content = self._build_card_content(text)
+        request = self._CreateMessageRequest.builder().receive_id_type("chat_id").request_body(self._CreateMessageRequestBody.builder().receive_id(chat_id).msg_type("interactive").content(content).build()).build()
+        await asyncio.to_thread(self._api_client.im.v1.message.create, request)
+
+    async def _update_card(self, message_id: str, text: str) -> None:
+        """Patch an existing card message in place."""
+        if not self._api_client or not self._PatchMessageRequest:
+            return
+
+        content = self._build_card_content(text)
+        request = self._PatchMessageRequest.builder().message_id(message_id).request_body(self._PatchMessageRequestBody.builder().content(content).build()).build()
+        await asyncio.to_thread(self._api_client.im.v1.message.patch, request)
+
+    def _track_background_task(self, task: asyncio.Task, *, name: str, msg_id: str) -> None:
+        """Keep a strong reference to fire-and-forget tasks and surface errors."""
+        self._background_tasks.add(task)
+        task.add_done_callback(lambda done_task, task_name=name, mid=msg_id: self._finalize_background_task(done_task, task_name, mid))
+
+    def _finalize_background_task(self, task: asyncio.Task, name: str, msg_id: str) -> None:
+        self._background_tasks.discard(task)
+        self._log_task_error(task, name, msg_id)
+
+    async def _create_running_card(self, source_message_id: str, text: str) -> str | None:
+        """Create the running card and cache its message ID when available."""
+        running_card_id = await self._reply_card(source_message_id, text)
+        if running_card_id:
+            self._running_card_ids[source_message_id] = running_card_id
+            logger.info("[Feishu] running card created: source=%s card=%s", source_message_id, running_card_id)
+        else:
+            logger.warning("[Feishu] running card creation returned no message_id for source=%s, subsequent updates will fall back to new replies", source_message_id)
+        return running_card_id
+
+    def _ensure_running_card_started(self, source_message_id: str, text: str = "Working on it...") -> asyncio.Task | None:
+        """Start running-card creation once per source message."""
+        running_card_id = self._running_card_ids.get(source_message_id)
+        if running_card_id:
+            return None
+
+        running_card_task = self._running_card_tasks.get(source_message_id)
+        if running_card_task:
+            return running_card_task
+
+        running_card_task = asyncio.create_task(self._create_running_card(source_message_id, text))
+        self._running_card_tasks[source_message_id] = running_card_task
+        running_card_task.add_done_callback(lambda done_task, mid=source_message_id: self._finalize_running_card_task(mid, done_task))
+        return running_card_task
+
+    def _finalize_running_card_task(self, source_message_id: str, task: asyncio.Task) -> None:
+        if self._running_card_tasks.get(source_message_id) is task:
+            self._running_card_tasks.pop(source_message_id, None)
+        self._log_task_error(task, "create_running_card", source_message_id)
+
+    async def _ensure_running_card(self, source_message_id: str, text: str = "Working on it...") -> str | None:
+        """Ensure the in-thread running card exists and track its message ID."""
+        running_card_id = self._running_card_ids.get(source_message_id)
+        if running_card_id:
+            return running_card_id
+
+        running_card_task = self._ensure_running_card_started(source_message_id, text)
+        if running_card_task is None:
+            return self._running_card_ids.get(source_message_id)
+        return await running_card_task
+
+    async def _send_running_reply(self, message_id: str) -> None:
+        """Reply to a message in-thread with a running card."""
+        try:
+            await self._ensure_running_card(message_id)
+        except Exception:
+            logger.exception("[Feishu] failed to send running reply for message %s", message_id)
+
+    async def _send_card_message(self, msg: OutboundMessage) -> None:
+        """Send or update the Feishu card tied to the current request."""
+        source_message_id = msg.thread_ts
+        if source_message_id:
+            running_card_id = self._running_card_ids.get(source_message_id)
+            awaited_running_card_task = False
+
+            if not running_card_id:
+                running_card_task = self._running_card_tasks.get(source_message_id)
+                if running_card_task:
+                    awaited_running_card_task = True
+                    running_card_id = await running_card_task
+
+            if running_card_id:
+                try:
+                    await self._update_card(running_card_id, msg.text)
+                except Exception:
+                    if not msg.is_final:
+                        raise
+                    logger.exception(
+                        "[Feishu] failed to patch running card %s, falling back to final reply",
+                        running_card_id,
+                    )
+                    await self._reply_card(source_message_id, msg.text)
+                else:
+                    logger.info("[Feishu] running card updated: source=%s card=%s", source_message_id, running_card_id)
+            elif msg.is_final:
+                await self._reply_card(source_message_id, msg.text)
+            elif awaited_running_card_task:
+                logger.warning(
+                    "[Feishu] running card task finished without message_id for source=%s, skipping duplicate non-final creation",
+                    source_message_id,
+                )
+            else:
+                await self._ensure_running_card(source_message_id, msg.text)
+
+            if msg.is_final:
+                self._running_card_ids.pop(source_message_id, None)
+                await self._add_reaction(source_message_id, "DONE")
+            return
+
+        await self._create_card(msg.chat_id, msg.text)
+
+    # -- internal ----------------------------------------------------------
+
+    @staticmethod
+    def _log_future_error(fut, name: str, msg_id: str) -> None:
+        """Callback for run_coroutine_threadsafe futures to surface errors."""
+        try:
+            exc = fut.exception()
+            if exc:
+                logger.error("[Feishu] %s failed for msg_id=%s: %s", name, msg_id, exc)
+        except Exception:
+            pass
+
+    @staticmethod
+    def _log_task_error(task: asyncio.Task, name: str, msg_id: str) -> None:
+        """Callback for background asyncio tasks to surface errors."""
+        try:
+            exc = task.exception()
+            if exc:
+                logger.error("[Feishu] %s failed for msg_id=%s: %s", name, msg_id, exc)
+        except asyncio.CancelledError:
+            logger.info("[Feishu] %s cancelled for msg_id=%s", name, msg_id)
+        except Exception:
+            pass
+
+    async def _prepare_inbound(self, msg_id: str, inbound) -> None:
+        """Kick off Feishu side effects without delaying inbound dispatch."""
+        reaction_task = asyncio.create_task(self._add_reaction(msg_id, "OK"))
+        self._track_background_task(reaction_task, name="add_reaction", msg_id=msg_id)
+        self._ensure_running_card_started(msg_id)
+        await self.bus.publish_inbound(inbound)
+
+    def _on_message(self, event) -> None:
+        """Called by lark-oapi when a message is received (runs in lark thread)."""
+        try:
+            logger.info("[Feishu] raw event received: type=%s", type(event).__name__)
+            message = event.event.message
+            chat_id = message.chat_id
+            msg_id = message.message_id
+            sender_id = event.event.sender.sender_id.open_id
+
+            # root_id is set when the message is a reply within a Feishu thread.
+            # Use it as topic_id so all replies share the same DeerFlow thread.
+            root_id = getattr(message, "root_id", None) or None
+
+            # Parse message content
+            content = json.loads(message.content)
+
+            # files_list store the any-file-key in feishu messages, which can be used to download the file content later
+            # In Feishu channel, image_keys are independent of file_keys.
+            # The file_key includes files, videos, and audio, but does not include stickers.
+            files_list = []
+
+            if "text" in content:
+                # Handle plain text messages
+                text = content["text"]
+            elif "file_key" in content:
+                file_key = content.get("file_key")
+                if isinstance(file_key, str) and file_key:
+                    files_list.append({"file_key": file_key})
+                    text = "[file]"
+                else:
+                    text = ""
+            elif "image_key" in content:
+                image_key = content.get("image_key")
+                if isinstance(image_key, str) and image_key:
+                    files_list.append({"image_key": image_key})
+                    text = "[image]"
+                else:
+                    text = ""
+            elif "content" in content and isinstance(content["content"], list):
+                # Handle rich-text messages with a top-level "content" list (e.g., topic groups/posts)
+                text_paragraphs: list[str] = []
+                for paragraph in content["content"]:
+                    if isinstance(paragraph, list):
+                        paragraph_text_parts: list[str] = []
+                        for element in paragraph:
+                            if isinstance(element, dict):
+                                # Include both normal text and @ mentions
+                                if element.get("tag") in ("text", "at"):
+                                    text_value = element.get("text", "")
+                                    if text_value:
+                                        paragraph_text_parts.append(text_value)
+                                elif element.get("tag") == "img":
+                                    image_key = element.get("image_key")
+                                    if isinstance(image_key, str) and image_key:
+                                        files_list.append({"image_key": image_key})
+                                        paragraph_text_parts.append("[image]")
+                                elif element.get("tag") in ("file", "media"):
+                                    file_key = element.get("file_key")
+                                    if isinstance(file_key, str) and file_key:
+                                        files_list.append({"file_key": file_key})
+                                        paragraph_text_parts.append("[file]")
+                        if paragraph_text_parts:
+                            # Join text segments within a paragraph with spaces to avoid "helloworld"
+                            text_paragraphs.append(" ".join(paragraph_text_parts))
+
+                # Join paragraphs with blank lines to preserve paragraph boundaries
+                text = "\n\n".join(text_paragraphs)
+            else:
+                text = ""
+            text = text.strip()
+
+            logger.info(
+                "[Feishu] parsed message: chat_id=%s, msg_id=%s, root_id=%s, sender=%s, text=%r",
+                chat_id,
+                msg_id,
+                root_id,
+                sender_id,
+                text[:100] if text else "",
+            )
+
+            if not (text or files_list):
+                logger.info("[Feishu] empty text, ignoring message")
+                return
+
+            # Only treat known slash commands as commands; absolute paths and
+            # other slash-prefixed text should be handled as normal chat.
+            if _is_feishu_command(text):
+                msg_type = InboundMessageType.COMMAND
+            else:
+                msg_type = InboundMessageType.CHAT
+
+            # topic_id: use root_id for replies (same topic), msg_id for new messages (new topic)
+            topic_id = root_id or msg_id
+
+            inbound = self._make_inbound(
+                chat_id=chat_id,
+                user_id=sender_id,
+                text=text,
+                msg_type=msg_type,
+                thread_ts=msg_id,
+                files=files_list,
+                metadata={"message_id": msg_id, "root_id": root_id},
+            )
+            inbound.topic_id = topic_id
+
+            # Schedule on the async event loop
+            if self._main_loop and self._main_loop.is_running():
+                logger.info("[Feishu] publishing inbound message to bus (type=%s, msg_id=%s)", msg_type.value, msg_id)
+                fut = asyncio.run_coroutine_threadsafe(self._prepare_inbound(msg_id, inbound), self._main_loop)
+                fut.add_done_callback(lambda f, mid=msg_id: self._log_future_error(f, "prepare_inbound", mid))
+            else:
+                logger.warning("[Feishu] main loop not running, cannot publish inbound message")
+        except Exception:
+            logger.exception("[Feishu] error processing message")

backend/app/channels/manager.py

@@ -0,0 +1,940 @@
+"""ChannelManager — consumes inbound messages and dispatches them to the DeerFlow agent via LangGraph Server."""
+
+from __future__ import annotations
+
+import asyncio
+import logging
+import mimetypes
+import re
+import time
+from collections.abc import Awaitable, Callable, Mapping
+from typing import Any
+
+import httpx
+from langgraph_sdk.errors import ConflictError
+
+from app.channels.commands import KNOWN_CHANNEL_COMMANDS
+from app.channels.message_bus import InboundMessage, InboundMessageType, MessageBus, OutboundMessage, ResolvedAttachment
+from app.channels.store import ChannelStore
+
+logger = logging.getLogger(__name__)
+
+DEFAULT_LANGGRAPH_URL = "http://localhost:2024"
+DEFAULT_GATEWAY_URL = "http://localhost:8001"
+DEFAULT_ASSISTANT_ID = "lead_agent"
+CUSTOM_AGENT_NAME_PATTERN = re.compile(r"^[A-Za-z0-9-]+$")
+
+DEFAULT_RUN_CONFIG: dict[str, Any] = {"recursion_limit": 100}
+DEFAULT_RUN_CONTEXT: dict[str, Any] = {
+    "thinking_enabled": True,
+    "is_plan_mode": False,
+    "subagent_enabled": False,
+}
+STREAM_UPDATE_MIN_INTERVAL_SECONDS = 0.35
+THREAD_BUSY_MESSAGE = "This conversation is already processing another request. Please wait for it to finish and try again."
+
+CHANNEL_CAPABILITIES = {
+    "feishu": {"supports_streaming": True},
+    "slack": {"supports_streaming": False},
+    "telegram": {"supports_streaming": False},
+    "wecom": {"supports_streaming": True},
+}
+
+InboundFileReader = Callable[[dict[str, Any], httpx.AsyncClient], Awaitable[bytes | None]]
+
+
+INBOUND_FILE_READERS: dict[str, InboundFileReader] = {}
+
+
+def register_inbound_file_reader(channel_name: str, reader: InboundFileReader) -> None:
+    INBOUND_FILE_READERS[channel_name] = reader
+
+
+async def _read_http_inbound_file(file_info: dict[str, Any], client: httpx.AsyncClient) -> bytes | None:
+    url = file_info.get("url")
+    if not isinstance(url, str) or not url:
+        return None
+
+    resp = await client.get(url)
+    resp.raise_for_status()
+    return resp.content
+
+
+async def _read_wecom_inbound_file(file_info: dict[str, Any], client: httpx.AsyncClient) -> bytes | None:
+    data = await _read_http_inbound_file(file_info, client)
+    if data is None:
+        return None
+
+    aeskey = file_info.get("aeskey") if isinstance(file_info.get("aeskey"), str) else None
+    if not aeskey:
+        return data
+
+    try:
+        from aibot.crypto_utils import decrypt_file
+    except Exception:
+        logger.exception("[Manager] failed to import WeCom decrypt_file")
+        return None
+
+    return decrypt_file(data, aeskey)
+
+
+register_inbound_file_reader("wecom", _read_wecom_inbound_file)
+
+
+class InvalidChannelSessionConfigError(ValueError):
+    """Raised when IM channel session overrides contain invalid agent config."""
+
+
+def _is_thread_busy_error(exc: BaseException | None) -> bool:
+    if exc is None:
+        return False
+    if isinstance(exc, ConflictError):
+        return True
+    return "already running a task" in str(exc)
+
+
+def _as_dict(value: Any) -> dict[str, Any]:
+    return dict(value) if isinstance(value, Mapping) else {}
+
+
+def _merge_dicts(*layers: Any) -> dict[str, Any]:
+    merged: dict[str, Any] = {}
+    for layer in layers:
+        if isinstance(layer, Mapping):
+            merged.update(layer)
+    return merged
+
+
+def _normalize_custom_agent_name(raw_value: str) -> str:
+    """Normalize legacy channel assistant IDs into valid custom agent names."""
+    normalized = raw_value.strip().lower().replace("_", "-")
+    if not normalized:
+        raise InvalidChannelSessionConfigError("Channel session assistant_id is empty. Use 'lead_agent' or a valid custom agent name.")
+    if not CUSTOM_AGENT_NAME_PATTERN.fullmatch(normalized):
+        raise InvalidChannelSessionConfigError(f"Invalid channel session assistant_id {raw_value!r}. Use 'lead_agent' or a custom agent name containing only letters, digits, and hyphens.")
+    return normalized
+
+
+def _extract_response_text(result: dict | list) -> str:
+    """Extract the last AI message text from a LangGraph runs.wait result.
+
+    ``runs.wait`` returns the final state dict which contains a ``messages``
+    list.  Each message is a dict with at least ``type`` and ``content``.
+
+    Handles special cases:
+    - Regular AI text responses
+    - Clarification interrupts (``ask_clarification`` tool messages)
+    - AI messages with tool_calls but no text content
+    """
+    if isinstance(result, list):
+        messages = result
+    elif isinstance(result, dict):
+        messages = result.get("messages", [])
+    else:
+        return ""
+
+    # Walk backwards to find usable response text, but stop at the last
+    # human message to avoid returning text from a previous turn.
+    for msg in reversed(messages):
+        if not isinstance(msg, dict):
+            continue
+
+        msg_type = msg.get("type")
+
+        # Stop at the last human message — anything before it is a previous turn
+        if msg_type == "human":
+            break
+
+        # Check for tool messages from ask_clarification (interrupt case)
+        if msg_type == "tool" and msg.get("name") == "ask_clarification":
+            content = msg.get("content", "")
+            if isinstance(content, str) and content:
+                return content
+
+        # Regular AI message with text content
+        if msg_type == "ai":
+            content = msg.get("content", "")
+            if isinstance(content, str) and content:
+                return content
+            # content can be a list of content blocks
+            if isinstance(content, list):
+                parts = []
+                for block in content:
+                    if isinstance(block, dict) and block.get("type") == "text":
+                        parts.append(block.get("text", ""))
+                    elif isinstance(block, str):
+                        parts.append(block)
+                text = "".join(parts)
+                if text:
+                    return text
+    return ""
+
+
+def _extract_text_content(content: Any) -> str:
+    """Extract text from a streaming payload content field."""
+    if isinstance(content, str):
+        return content
+    if isinstance(content, list):
+        parts: list[str] = []
+        for block in content:
+            if isinstance(block, str):
+                parts.append(block)
+            elif isinstance(block, Mapping):
+                text = block.get("text")
+                if isinstance(text, str):
+                    parts.append(text)
+                else:
+                    nested = block.get("content")
+                    if isinstance(nested, str):
+                        parts.append(nested)
+        return "".join(parts)
+    if isinstance(content, Mapping):
+        for key in ("text", "content"):
+            value = content.get(key)
+            if isinstance(value, str):
+                return value
+    return ""
+
+
+def _merge_stream_text(existing: str, chunk: str) -> str:
+    """Merge either delta text or cumulative text into a single snapshot."""
+    if not chunk:
+        return existing
+    if not existing or chunk == existing:
+        return chunk or existing
+    if chunk.startswith(existing):
+        return chunk
+    if existing.endswith(chunk):
+        return existing
+    return existing + chunk
+
+
+def _extract_stream_message_id(payload: Any, metadata: Any) -> str | None:
+    """Best-effort extraction of the streamed AI message identifier."""
+    candidates = [payload, metadata]
+    if isinstance(payload, Mapping):
+        candidates.append(payload.get("kwargs"))
+
+    for candidate in candidates:
+        if not isinstance(candidate, Mapping):
+            continue
+        for key in ("id", "message_id"):
+            value = candidate.get(key)
+            if isinstance(value, str) and value:
+                return value
+    return None
+
+
+def _accumulate_stream_text(
+    buffers: dict[str, str],
+    current_message_id: str | None,
+    event_data: Any,
+) -> tuple[str | None, str | None]:
+    """Convert a ``messages-tuple`` event into the latest displayable AI text."""
+    payload = event_data
+    metadata: Any = None
+    if isinstance(event_data, (list, tuple)):
+        if event_data:
+            payload = event_data[0]
+        if len(event_data) > 1:
+            metadata = event_data[1]
+
+    if isinstance(payload, str):
+        message_id = current_message_id or "__default__"
+        buffers[message_id] = _merge_stream_text(buffers.get(message_id, ""), payload)
+        return buffers[message_id], message_id
+
+    if not isinstance(payload, Mapping):
+        return None, current_message_id
+
+    payload_type = str(payload.get("type", "")).lower()
+    if "tool" in payload_type:
+        return None, current_message_id
+
+    text = _extract_text_content(payload.get("content"))
+    if not text and isinstance(payload.get("kwargs"), Mapping):
+        text = _extract_text_content(payload["kwargs"].get("content"))
+    if not text:
+        return None, current_message_id
+
+    message_id = _extract_stream_message_id(payload, metadata) or current_message_id or "__default__"
+    buffers[message_id] = _merge_stream_text(buffers.get(message_id, ""), text)
+    return buffers[message_id], message_id
+
+
+def _extract_artifacts(result: dict | list) -> list[str]:
+    """Extract artifact paths from the last AI response cycle only.
+
+    Instead of reading the full accumulated ``artifacts`` state (which contains
+    all artifacts ever produced in the thread), this inspects the messages after
+    the last human message and collects file paths from ``present_files`` tool
+    calls.  This ensures only newly-produced artifacts are returned.
+    """
+    if isinstance(result, list):
+        messages = result
+    elif isinstance(result, dict):
+        messages = result.get("messages", [])
+    else:
+        return []
+
+    artifacts: list[str] = []
+    for msg in reversed(messages):
+        if not isinstance(msg, dict):
+            continue
+        # Stop at the last human message — anything before it is a previous turn
+        if msg.get("type") == "human":
+            break
+        # Look for AI messages with present_files tool calls
+        if msg.get("type") == "ai":
+            for tc in msg.get("tool_calls", []):
+                if isinstance(tc, dict) and tc.get("name") == "present_files":
+                    args = tc.get("args", {})
+                    paths = args.get("filepaths", [])
+                    if isinstance(paths, list):
+                        artifacts.extend(p for p in paths if isinstance(p, str))
+    return artifacts
+
+
+def _format_artifact_text(artifacts: list[str]) -> str:
+    """Format artifact paths into a human-readable text block listing filenames."""
+    import posixpath
+
+    filenames = [posixpath.basename(p) for p in artifacts]
+    if len(filenames) == 1:
+        return f"Created File: 📎 {filenames[0]}"
+    return "Created Files: 📎 " + "、".join(filenames)
+
+
+_OUTPUTS_VIRTUAL_PREFIX = "/mnt/user-data/outputs/"
+
+
+def _resolve_attachments(thread_id: str, artifacts: list[str]) -> list[ResolvedAttachment]:
+    """Resolve virtual artifact paths to host filesystem paths with metadata.
+
+    Only paths under ``/mnt/user-data/outputs/`` are accepted; any other
+    virtual path is rejected with a warning to prevent exfiltrating uploads
+    or workspace files via IM channels.
+
+    Skips artifacts that cannot be resolved (missing files, invalid paths)
+    and logs warnings for them.
+    """
+    from deerflow.config.paths import get_paths
+
+    attachments: list[ResolvedAttachment] = []
+    paths = get_paths()
+    outputs_dir = paths.sandbox_outputs_dir(thread_id).resolve()
+    for virtual_path in artifacts:
+        # Security: only allow files from the agent outputs directory
+        if not virtual_path.startswith(_OUTPUTS_VIRTUAL_PREFIX):
+            logger.warning("[Manager] rejected non-outputs artifact path: %s", virtual_path)
+            continue
+        try:
+            actual = paths.resolve_virtual_path(thread_id, virtual_path)
+            # Verify the resolved path is actually under the outputs directory
+            # (guards against path-traversal even after prefix check)
+            try:
+                actual.resolve().relative_to(outputs_dir)
+            except ValueError:
+                logger.warning("[Manager] artifact path escapes outputs dir: %s -> %s", virtual_path, actual)
+                continue
+            if not actual.is_file():
+                logger.warning("[Manager] artifact not found on disk: %s -> %s", virtual_path, actual)
+                continue
+            mime, _ = mimetypes.guess_type(str(actual))
+            mime = mime or "application/octet-stream"
+            attachments.append(
+                ResolvedAttachment(
+                    virtual_path=virtual_path,
+                    actual_path=actual,
+                    filename=actual.name,
+                    mime_type=mime,
+                    size=actual.stat().st_size,
+                    is_image=mime.startswith("image/"),
+                )
+            )
+        except (ValueError, OSError) as exc:
+            logger.warning("[Manager] failed to resolve artifact %s: %s", virtual_path, exc)
+    return attachments
+
+
+def _prepare_artifact_delivery(
+    thread_id: str,
+    response_text: str,
+    artifacts: list[str],
+) -> tuple[str, list[ResolvedAttachment]]:
+    """Resolve attachments and append filename fallbacks to the text response."""
+    attachments: list[ResolvedAttachment] = []
+    if not artifacts:
+        return response_text, attachments
+
+    attachments = _resolve_attachments(thread_id, artifacts)
+    resolved_virtuals = {attachment.virtual_path for attachment in attachments}
+    unresolved = [path for path in artifacts if path not in resolved_virtuals]
+
+    if unresolved:
+        artifact_text = _format_artifact_text(unresolved)
+        response_text = (response_text + "\n\n" + artifact_text) if response_text else artifact_text
+
+    # Always include resolved attachment filenames as a text fallback so files
+    # remain discoverable even when the upload is skipped or fails.
+    if attachments:
+        resolved_text = _format_artifact_text([attachment.virtual_path for attachment in attachments])
+        response_text = (response_text + "\n\n" + resolved_text) if response_text else resolved_text
+
+    return response_text, attachments
+
+
+async def _ingest_inbound_files(thread_id: str, msg: InboundMessage) -> list[dict[str, Any]]:
+    if not msg.files:
+        return []
+
+    from deerflow.uploads.manager import claim_unique_filename, ensure_uploads_dir, normalize_filename
+
+    uploads_dir = ensure_uploads_dir(thread_id)
+    seen_names = {entry.name for entry in uploads_dir.iterdir() if entry.is_file()}
+
+    created: list[dict[str, Any]] = []
+    file_reader = INBOUND_FILE_READERS.get(msg.channel_name, _read_http_inbound_file)
+    async with httpx.AsyncClient(timeout=httpx.Timeout(20.0)) as client:
+        for idx, f in enumerate(msg.files):
+            if not isinstance(f, dict):
+                continue
+
+            ftype = f.get("type") if isinstance(f.get("type"), str) else "file"
+            filename = f.get("filename") if isinstance(f.get("filename"), str) else ""
+
+            try:
+                data = await file_reader(f, client)
+            except Exception:
+                logger.exception(
+                    "[Manager] failed to read inbound file: channel=%s, file=%s",
+                    msg.channel_name,
+                    f.get("url") or filename or idx,
+                )
+                continue
+
+            if data is None:
+                logger.warning(
+                    "[Manager] inbound file reader returned no data: channel=%s, file=%s",
+                    msg.channel_name,
+                    f.get("url") or filename or idx,
+                )
+                continue
+
+            if not filename:
+                ext = ".bin"
+                if ftype == "image":
+                    ext = ".png"
+                filename = f"{msg.thread_ts or 'msg'}_{idx}{ext}"
+
+            try:
+                safe_name = claim_unique_filename(normalize_filename(filename), seen_names)
+            except ValueError:
+                logger.warning(
+                    "[Manager] skipping inbound file with unsafe filename: channel=%s, file=%r",
+                    msg.channel_name,
+                    filename,
+                )
+                continue
+
+            dest = uploads_dir / safe_name
+            try:
+                dest.write_bytes(data)
+            except Exception:
+                logger.exception("[Manager] failed to write inbound file: %s", dest)
+                continue
+
+            created.append(
+                {
+                    "filename": safe_name,
+                    "size": len(data),
+                    "path": f"/mnt/user-data/uploads/{safe_name}",
+                    "is_image": ftype == "image",
+                }
+            )
+
+    return created
+
+
+def _format_uploaded_files_block(files: list[dict[str, Any]]) -> str:
+    lines = [
+        "<uploaded_files>",
+        "The following files were uploaded in this message:",
+        "",
+    ]
+    if not files:
+        lines.append("(empty)")
+    else:
+        for f in files:
+            filename = f.get("filename", "")
+            size = int(f.get("size") or 0)
+            size_kb = size / 1024 if size else 0
+            size_str = f"{size_kb:.1f} KB" if size_kb < 1024 else f"{size_kb / 1024:.1f} MB"
+            path = f.get("path", "")
+            is_image = bool(f.get("is_image"))
+            file_kind = "image" if is_image else "file"
+            lines.append(f"- {filename} ({size_str})")
+            lines.append(f"  Type: {file_kind}")
+            lines.append(f"  Path: {path}")
+            lines.append("")
+    lines.append("Use `read_file` for text-based files and documents.")
+    lines.append("Use `view_image` for image files (jpg, jpeg, png, webp) so the model can inspect the image content.")
+    lines.append("</uploaded_files>")
+    return "\n".join(lines)
+
+
+class ChannelManager:
+    """Core dispatcher that bridges IM channels to the DeerFlow agent.
+
+    It reads from the MessageBus inbound queue, creates/reuses threads on
+    the LangGraph Server, sends messages via ``runs.wait``, and publishes
+    outbound responses back through the bus.
+    """
+
+    def __init__(
+        self,
+        bus: MessageBus,
+        store: ChannelStore,
+        *,
+        max_concurrency: int = 5,
+        langgraph_url: str = DEFAULT_LANGGRAPH_URL,
+        gateway_url: str = DEFAULT_GATEWAY_URL,
+        assistant_id: str = DEFAULT_ASSISTANT_ID,
+        default_session: dict[str, Any] | None = None,
+        channel_sessions: dict[str, Any] | None = None,
+    ) -> None:
+        self.bus = bus
+        self.store = store
+        self._max_concurrency = max_concurrency
+        self._langgraph_url = langgraph_url
+        self._gateway_url = gateway_url
+        self._assistant_id = assistant_id
+        self._default_session = _as_dict(default_session)
+        self._channel_sessions = dict(channel_sessions or {})
+        self._client = None  # lazy init — langgraph_sdk async client
+        self._semaphore: asyncio.Semaphore | None = None
+        self._running = False
+        self._task: asyncio.Task | None = None
+
+    @staticmethod
+    def _channel_supports_streaming(channel_name: str) -> bool:
+        return CHANNEL_CAPABILITIES.get(channel_name, {}).get("supports_streaming", False)
+
+    def _resolve_session_layer(self, msg: InboundMessage) -> tuple[dict[str, Any], dict[str, Any]]:
+        channel_layer = _as_dict(self._channel_sessions.get(msg.channel_name))
+        users_layer = _as_dict(channel_layer.get("users"))
+        user_layer = _as_dict(users_layer.get(msg.user_id))
+        return channel_layer, user_layer
+
+    def _resolve_run_params(self, msg: InboundMessage, thread_id: str) -> tuple[str, dict[str, Any], dict[str, Any]]:
+        channel_layer, user_layer = self._resolve_session_layer(msg)
+
+        assistant_id = user_layer.get("assistant_id") or channel_layer.get("assistant_id") or self._default_session.get("assistant_id") or self._assistant_id
+        if not isinstance(assistant_id, str) or not assistant_id.strip():
+            assistant_id = self._assistant_id
+
+        run_config = _merge_dicts(
+            DEFAULT_RUN_CONFIG,
+            self._default_session.get("config"),
+            channel_layer.get("config"),
+            user_layer.get("config"),
+        )
+
+        run_context = _merge_dicts(
+            DEFAULT_RUN_CONTEXT,
+            self._default_session.get("context"),
+            channel_layer.get("context"),
+            user_layer.get("context"),
+            {"thread_id": thread_id},
+        )
+
+        # Custom agents are implemented as lead_agent + agent_name context.
+        # Keep backward compatibility for channel configs that set
+        # assistant_id: <custom-agent-name> by routing through lead_agent.
+        if assistant_id != DEFAULT_ASSISTANT_ID:
+            run_context.setdefault("agent_name", _normalize_custom_agent_name(assistant_id))
+            assistant_id = DEFAULT_ASSISTANT_ID
+
+        return assistant_id, run_config, run_context
+
+    # -- LangGraph SDK client (lazy) ----------------------------------------
+
+    def _get_client(self):
+        """Return the ``langgraph_sdk`` async client, creating it on first use."""
+        if self._client is None:
+            from langgraph_sdk import get_client
+
+            self._client = get_client(url=self._langgraph_url)
+        return self._client
+
+    # -- lifecycle ---------------------------------------------------------
+
+    async def start(self) -> None:
+        """Start the dispatch loop."""
+        if self._running:
+            return
+        self._running = True
+        self._semaphore = asyncio.Semaphore(self._max_concurrency)
+        self._task = asyncio.create_task(self._dispatch_loop())
+        logger.info("ChannelManager started (max_concurrency=%d)", self._max_concurrency)
+
+    async def stop(self) -> None:
+        """Stop the dispatch loop."""
+        self._running = False
+        if self._task:
+            self._task.cancel()
+            try:
+                await self._task
+            except asyncio.CancelledError:
+                pass
+            self._task = None
+        logger.info("ChannelManager stopped")
+
+    # -- dispatch loop -----------------------------------------------------
+
+    async def _dispatch_loop(self) -> None:
+        logger.info("[Manager] dispatch loop started, waiting for inbound messages")
+        while self._running:
+            try:
+                msg = await asyncio.wait_for(self.bus.get_inbound(), timeout=1.0)
+            except TimeoutError:
+                continue
+            except asyncio.CancelledError:
+                break
+
+            logger.info(
+                "[Manager] received inbound: channel=%s, chat_id=%s, type=%s, text=%r",
+                msg.channel_name,
+                msg.chat_id,
+                msg.msg_type.value,
+                msg.text[:100] if msg.text else "",
+            )
+            task = asyncio.create_task(self._handle_message(msg))
+            task.add_done_callback(self._log_task_error)
+
+    @staticmethod
+    def _log_task_error(task: asyncio.Task) -> None:
+        """Surface unhandled exceptions from background tasks."""
+        if task.cancelled():
+            return
+        exc = task.exception()
+        if exc:
+            logger.error("[Manager] unhandled error in message task: %s", exc, exc_info=exc)
+
+    async def _handle_message(self, msg: InboundMessage) -> None:
+        async with self._semaphore:
+            try:
+                if msg.msg_type == InboundMessageType.COMMAND:
+                    await self._handle_command(msg)
+                else:
+                    await self._handle_chat(msg)
+            except InvalidChannelSessionConfigError as exc:
+                logger.warning(
+                    "Invalid channel session config for %s (chat=%s): %s",
+                    msg.channel_name,
+                    msg.chat_id,
+                    exc,
+                )
+                await self._send_error(msg, str(exc))
+            except Exception:
+                logger.exception(
+                    "Error handling message from %s (chat=%s)",
+                    msg.channel_name,
+                    msg.chat_id,
+                )
+                await self._send_error(msg, "An internal error occurred. Please try again.")
+
+    # -- chat handling -----------------------------------------------------
+
+    async def _create_thread(self, client, msg: InboundMessage) -> str:
+        """Create a new thread on the LangGraph Server and store the mapping."""
+        thread = await client.threads.create()
+        thread_id = thread["thread_id"]
+        self.store.set_thread_id(
+            msg.channel_name,
+            msg.chat_id,
+            thread_id,
+            topic_id=msg.topic_id,
+            user_id=msg.user_id,
+        )
+        logger.info("[Manager] new thread created on LangGraph Server: thread_id=%s for chat_id=%s topic_id=%s", thread_id, msg.chat_id, msg.topic_id)
+        return thread_id
+
+    async def _handle_chat(self, msg: InboundMessage, extra_context: dict[str, Any] | None = None) -> None:
+        client = self._get_client()
+
+        # Look up existing DeerFlow thread.
+        # topic_id may be None (e.g. Telegram private chats) — the store
+        # handles this by using the "channel:chat_id" key without a topic suffix.
+        thread_id = self.store.get_thread_id(msg.channel_name, msg.chat_id, topic_id=msg.topic_id)
+        if thread_id:
+            logger.info("[Manager] reusing thread: thread_id=%s for topic_id=%s", thread_id, msg.topic_id)
+
+        # No existing thread found — create a new one
+        if thread_id is None:
+            thread_id = await self._create_thread(client, msg)
+
+        assistant_id, run_config, run_context = self._resolve_run_params(msg, thread_id)
+
+        # If the inbound message contains file attachments, let the channel
+        # materialize (download) them and update msg.text to include sandbox file paths.
+        # This enables downstream models to access user-uploaded files by path.
+        # Channels that do not support file download will simply return the original message.
+        if msg.files:
+            from .service import get_channel_service
+
+            service = get_channel_service()
+            channel = service.get_channel(msg.channel_name) if service else None
+            logger.info("[Manager] preparing receive file context for %d attachments", len(msg.files))
+            msg = await channel.receive_file(msg, thread_id) if channel else msg
+        if extra_context:
+            run_context.update(extra_context)
+
+        uploaded = await _ingest_inbound_files(thread_id, msg)
+        if uploaded:
+            msg.text = f"{_format_uploaded_files_block(uploaded)}\n\n{msg.text}".strip()
+
+        if self._channel_supports_streaming(msg.channel_name):
+            await self._handle_streaming_chat(
+                client,
+                msg,
+                thread_id,
+                assistant_id,
+                run_config,
+                run_context,
+            )
+            return
+
+        logger.info("[Manager] invoking runs.wait(thread_id=%s, text=%r)", thread_id, msg.text[:100])
+        result = await client.runs.wait(
+            thread_id,
+            assistant_id,
+            input={"messages": [{"role": "human", "content": msg.text}]},
+            config=run_config,
+            context=run_context,
+        )
+
+        response_text = _extract_response_text(result)
+        artifacts = _extract_artifacts(result)
+
+        logger.info(
+            "[Manager] agent response received: thread_id=%s, response_len=%d, artifacts=%d",
+            thread_id,
+            len(response_text) if response_text else 0,
+            len(artifacts),
+        )
+
+        response_text, attachments = _prepare_artifact_delivery(thread_id, response_text, artifacts)
+
+        if not response_text:
+            if attachments:
+                response_text = _format_artifact_text([a.virtual_path for a in attachments])
+            else:
+                response_text = "(No response from agent)"
+
+        outbound = OutboundMessage(
+            channel_name=msg.channel_name,
+            chat_id=msg.chat_id,
+            thread_id=thread_id,
+            text=response_text,
+            artifacts=artifacts,
+            attachments=attachments,
+            thread_ts=msg.thread_ts,
+        )
+        logger.info("[Manager] publishing outbound message to bus: channel=%s, chat_id=%s", msg.channel_name, msg.chat_id)
+        await self.bus.publish_outbound(outbound)
+
+    async def _handle_streaming_chat(
+        self,
+        client,
+        msg: InboundMessage,
+        thread_id: str,
+        assistant_id: str,
+        run_config: dict[str, Any],
+        run_context: dict[str, Any],
+    ) -> None:
+        logger.info("[Manager] invoking runs.stream(thread_id=%s, text=%r)", thread_id, msg.text[:100])
+
+        last_values: dict[str, Any] | list | None = None
+        streamed_buffers: dict[str, str] = {}
+        current_message_id: str | None = None
+        latest_text = ""
+        last_published_text = ""
+        last_publish_at = 0.0
+        stream_error: BaseException | None = None
+
+        try:
+            async for chunk in client.runs.stream(
+                thread_id,
+                assistant_id,
+                input={"messages": [{"role": "human", "content": msg.text}]},
+                config=run_config,
+                context=run_context,
+                stream_mode=["messages-tuple", "values"],
+                multitask_strategy="reject",
+            ):
+                event = getattr(chunk, "event", "")
+                data = getattr(chunk, "data", None)
+
+                if event == "messages-tuple":
+                    accumulated_text, current_message_id = _accumulate_stream_text(streamed_buffers, current_message_id, data)
+                    if accumulated_text:
+                        latest_text = accumulated_text
+                elif event == "values" and isinstance(data, (dict, list)):
+                    last_values = data
+                    snapshot_text = _extract_response_text(data)
+                    if snapshot_text:
+                        latest_text = snapshot_text
+
+                if not latest_text or latest_text == last_published_text:
+                    continue
+
+                now = time.monotonic()
+                if last_published_text and now - last_publish_at < STREAM_UPDATE_MIN_INTERVAL_SECONDS:
+                    continue
+
+                await self.bus.publish_outbound(
+                    OutboundMessage(
+                        channel_name=msg.channel_name,
+                        chat_id=msg.chat_id,
+                        thread_id=thread_id,
+                        text=latest_text,
+                        is_final=False,
+                        thread_ts=msg.thread_ts,
+                    )
+                )
+                last_published_text = latest_text
+                last_publish_at = now
+        except Exception as exc:
+            stream_error = exc
+            if _is_thread_busy_error(exc):
+                logger.warning("[Manager] thread busy (concurrent run rejected): thread_id=%s", thread_id)
+            else:
+                logger.exception("[Manager] streaming error: thread_id=%s", thread_id)
+        finally:
+            result = last_values if last_values is not None else {"messages": [{"type": "ai", "content": latest_text}]}
+            response_text = _extract_response_text(result)
+            artifacts = _extract_artifacts(result)
+            response_text, attachments = _prepare_artifact_delivery(thread_id, response_text, artifacts)
+
+            if not response_text:
+                if attachments:
+                    response_text = _format_artifact_text([attachment.virtual_path for attachment in attachments])
+                elif stream_error:
+                    if _is_thread_busy_error(stream_error):
+                        response_text = THREAD_BUSY_MESSAGE
+                    else:
+                        response_text = "An error occurred while processing your request. Please try again."
+                else:
+                    response_text = latest_text or "(No response from agent)"
+
+            logger.info(
+                "[Manager] streaming response completed: thread_id=%s, response_len=%d, artifacts=%d, error=%s",
+                thread_id,
+                len(response_text),
+                len(artifacts),
+                stream_error,
+            )
+            await self.bus.publish_outbound(
+                OutboundMessage(
+                    channel_name=msg.channel_name,
+                    chat_id=msg.chat_id,
+                    thread_id=thread_id,
+                    text=response_text,
+                    artifacts=artifacts,
+                    attachments=attachments,
+                    is_final=True,
+                    thread_ts=msg.thread_ts,
+                )
+            )
+
+    # -- command handling --------------------------------------------------
+
+    async def _handle_command(self, msg: InboundMessage) -> None:
+        text = msg.text.strip()
+        parts = text.split(maxsplit=1)
+        command = parts[0].lower().lstrip("/")
+
+        if command == "bootstrap":
+            from dataclasses import replace as _dc_replace
+
+            chat_text = parts[1] if len(parts) > 1 else "Initialize workspace"
+            chat_msg = _dc_replace(msg, text=chat_text, msg_type=InboundMessageType.CHAT)
+            await self._handle_chat(chat_msg, extra_context={"is_bootstrap": True})
+            return
+
+        if command == "new":
+            # Create a new thread on the LangGraph Server
+            client = self._get_client()
+            thread = await client.threads.create()
+            new_thread_id = thread["thread_id"]
+            self.store.set_thread_id(
+                msg.channel_name,
+                msg.chat_id,
+                new_thread_id,
+                topic_id=msg.topic_id,
+                user_id=msg.user_id,
+            )
+            reply = "New conversation started."
+        elif command == "status":
+            thread_id = self.store.get_thread_id(msg.channel_name, msg.chat_id, topic_id=msg.topic_id)
+            reply = f"Active thread: {thread_id}" if thread_id else "No active conversation."
+        elif command == "models":
+            reply = await self._fetch_gateway("/api/models", "models")
+        elif command == "memory":
+            reply = await self._fetch_gateway("/api/memory", "memory")
+        elif command == "help":
+            reply = (
+                "Available commands:\n"
+                "/bootstrap — Start a bootstrap session (enables agent setup)\n"
+                "/new — Start a new conversation\n"
+                "/status — Show current thread info\n"
+                "/models — List available models\n"
+                "/memory — Show memory status\n"
+                "/help — Show this help"
+            )
+        else:
+            available = " | ".join(sorted(KNOWN_CHANNEL_COMMANDS))
+            reply = f"Unknown command: /{command}. Available commands: {available}"
+
+        outbound = OutboundMessage(
+            channel_name=msg.channel_name,
+            chat_id=msg.chat_id,
+            thread_id=self.store.get_thread_id(msg.channel_name, msg.chat_id) or "",
+            text=reply,
+            thread_ts=msg.thread_ts,
+        )
+        await self.bus.publish_outbound(outbound)
+
+    async def _fetch_gateway(self, path: str, kind: str) -> str:
+        """Fetch data from the Gateway API for command responses."""
+        import httpx
+
+        try:
+            async with httpx.AsyncClient() as http:
+                resp = await http.get(f"{self._gateway_url}{path}", timeout=10)
+                resp.raise_for_status()
+                data = resp.json()
+        except Exception:
+            logger.exception("Failed to fetch %s from gateway", kind)
+            return f"Failed to fetch {kind} information."
+
+        if kind == "models":
+            names = [m["name"] for m in data.get("models", [])]
+            return ("Available models:\n" + "\n".join(f"• {n}" for n in names)) if names else "No models configured."
+        elif kind == "memory":
+            facts = data.get("facts", [])
+            return f"Memory contains {len(facts)} fact(s)."
+        return str(data)
+
+    # -- error helper ------------------------------------------------------
+
+    async def _send_error(self, msg: InboundMessage, error_text: str) -> None:
+        outbound = OutboundMessage(
+            channel_name=msg.channel_name,
+            chat_id=msg.chat_id,
+            thread_id=self.store.get_thread_id(msg.channel_name, msg.chat_id) or "",
+            text=error_text,
+            thread_ts=msg.thread_ts,
+        )
+        await self.bus.publish_outbound(outbound)

backend/app/channels/message_bus.py

@@ -0,0 +1,173 @@
+"""MessageBus — async pub/sub hub that decouples channels from the agent dispatcher."""
+
+from __future__ import annotations
+
+import asyncio
+import logging
+import time
+from collections.abc import Callable, Coroutine
+from dataclasses import dataclass, field
+from enum import StrEnum
+from pathlib import Path
+from typing import Any
+
+logger = logging.getLogger(__name__)
+
+
+# ---------------------------------------------------------------------------
+# Message types
+# ---------------------------------------------------------------------------
+
+
+class InboundMessageType(StrEnum):
+    """Types of messages arriving from IM channels."""
+
+    CHAT = "chat"
+    COMMAND = "command"
+
+
+@dataclass
+class InboundMessage:
+    """A message arriving from an IM channel toward the agent dispatcher.
+
+    Attributes:
+        channel_name: Name of the source channel (e.g. "feishu", "slack").
+        chat_id: Platform-specific chat/conversation identifier.
+        user_id: Platform-specific user identifier.
+        text: The message text.
+        msg_type: Whether this is a regular chat message or a command.
+        thread_ts: Optional platform thread identifier (for threaded replies).
+        topic_id: Conversation topic identifier used to map to a DeerFlow thread.
+            Messages sharing the same ``topic_id`` within a ``chat_id`` will
+            reuse the same DeerFlow thread.  When ``None``, each message
+            creates a new thread (one-shot Q&A).
+        files: Optional list of file attachments (platform-specific dicts).
+        metadata: Arbitrary extra data from the channel.
+        created_at: Unix timestamp when the message was created.
+    """
+
+    channel_name: str
+    chat_id: str
+    user_id: str
+    text: str
+    msg_type: InboundMessageType = InboundMessageType.CHAT
+    thread_ts: str | None = None
+    topic_id: str | None = None
+    files: list[dict[str, Any]] = field(default_factory=list)
+    metadata: dict[str, Any] = field(default_factory=dict)
+    created_at: float = field(default_factory=time.time)
+
+
+@dataclass
+class ResolvedAttachment:
+    """A file attachment resolved to a host filesystem path, ready for upload.
+
+    Attributes:
+        virtual_path: Original virtual path (e.g. /mnt/user-data/outputs/report.pdf).
+        actual_path: Resolved host filesystem path.
+        filename: Basename of the file.
+        mime_type: MIME type (e.g. "application/pdf").
+        size: File size in bytes.
+        is_image: True for image/* MIME types (platforms may handle images differently).
+    """
+
+    virtual_path: str
+    actual_path: Path
+    filename: str
+    mime_type: str
+    size: int
+    is_image: bool
+
+
+@dataclass
+class OutboundMessage:
+    """A message from the agent dispatcher back to a channel.
+
+    Attributes:
+        channel_name: Target channel name (used for routing).
+        chat_id: Target chat/conversation identifier.
+        thread_id: DeerFlow thread ID that produced this response.
+        text: The response text.
+        artifacts: List of artifact paths produced by the agent.
+        is_final: Whether this is the final message in the response stream.
+        thread_ts: Optional platform thread identifier for threaded replies.
+        metadata: Arbitrary extra data.
+        created_at: Unix timestamp.
+    """
+
+    channel_name: str
+    chat_id: str
+    thread_id: str
+    text: str
+    artifacts: list[str] = field(default_factory=list)
+    attachments: list[ResolvedAttachment] = field(default_factory=list)
+    is_final: bool = True
+    thread_ts: str | None = None
+    metadata: dict[str, Any] = field(default_factory=dict)
+    created_at: float = field(default_factory=time.time)
+
+
+# ---------------------------------------------------------------------------
+# MessageBus
+# ---------------------------------------------------------------------------
+
+OutboundCallback = Callable[[OutboundMessage], Coroutine[Any, Any, None]]
+
+
+class MessageBus:
+    """Async pub/sub hub connecting channels and the agent dispatcher.
+
+    Channels publish inbound messages; the dispatcher consumes them.
+    The dispatcher publishes outbound messages; channels receive them
+    via registered callbacks.
+    """
+
+    def __init__(self) -> None:
+        self._inbound_queue: asyncio.Queue[InboundMessage] = asyncio.Queue()
+        self._outbound_listeners: list[OutboundCallback] = []
+
+    # -- inbound -----------------------------------------------------------
+
+    async def publish_inbound(self, msg: InboundMessage) -> None:
+        """Enqueue an inbound message from a channel."""
+        await self._inbound_queue.put(msg)
+        logger.info(
+            "[Bus] inbound enqueued: channel=%s, chat_id=%s, type=%s, queue_size=%d",
+            msg.channel_name,
+            msg.chat_id,
+            msg.msg_type.value,
+            self._inbound_queue.qsize(),
+        )
+
+    async def get_inbound(self) -> InboundMessage:
+        """Block until the next inbound message is available."""
+        return await self._inbound_queue.get()
+
+    @property
+    def inbound_queue(self) -> asyncio.Queue[InboundMessage]:
+        return self._inbound_queue
+
+    # -- outbound ----------------------------------------------------------
+
+    def subscribe_outbound(self, callback: OutboundCallback) -> None:
+        """Register an async callback for outbound messages."""
+        self._outbound_listeners.append(callback)
+
+    def unsubscribe_outbound(self, callback: OutboundCallback) -> None:
+        """Remove a previously registered outbound callback."""
+        self._outbound_listeners = [cb for cb in self._outbound_listeners if cb is not callback]
+
+    async def publish_outbound(self, msg: OutboundMessage) -> None:
+        """Dispatch an outbound message to all registered listeners."""
+        logger.info(
+            "[Bus] outbound dispatching: channel=%s, chat_id=%s, listeners=%d, text_len=%d",
+            msg.channel_name,
+            msg.chat_id,
+            len(self._outbound_listeners),
+            len(msg.text),
+        )
+        for callback in self._outbound_listeners:
+            try:
+                await callback(msg)
+            except Exception:
+                logger.exception("Error in outbound callback for channel=%s", msg.channel_name)

backend/app/channels/service.py

@@ -0,0 +1,198 @@
+"""ChannelService — manages the lifecycle of all IM channels."""
+
+from __future__ import annotations
+
+import logging
+import os
+from typing import Any
+
+from app.channels.base import Channel
+from app.channels.manager import DEFAULT_GATEWAY_URL, DEFAULT_LANGGRAPH_URL, ChannelManager
+from app.channels.message_bus import MessageBus
+from app.channels.store import ChannelStore
+
+logger = logging.getLogger(__name__)
+
+# Channel name → import path for lazy loading
+_CHANNEL_REGISTRY: dict[str, str] = {
+    "feishu": "app.channels.feishu:FeishuChannel",
+    "slack": "app.channels.slack:SlackChannel",
+    "telegram": "app.channels.telegram:TelegramChannel",
+    "wecom": "app.channels.wecom:WeComChannel",
+}
+
+_CHANNELS_LANGGRAPH_URL_ENV = "DEER_FLOW_CHANNELS_LANGGRAPH_URL"
+_CHANNELS_GATEWAY_URL_ENV = "DEER_FLOW_CHANNELS_GATEWAY_URL"
+
+
+def _resolve_service_url(config: dict[str, Any], config_key: str, env_key: str, default: str) -> str:
+    value = config.pop(config_key, None)
+    if isinstance(value, str) and value.strip():
+        return value
+    env_value = os.getenv(env_key, "").strip()
+    if env_value:
+        return env_value
+    return default
+
+
+class ChannelService:
+    """Manages the lifecycle of all configured IM channels.
+
+    Reads configuration from ``config.yaml`` under the ``channels`` key,
+    instantiates enabled channels, and starts the ChannelManager dispatcher.
+    """
+
+    def __init__(self, channels_config: dict[str, Any] | None = None) -> None:
+        self.bus = MessageBus()
+        self.store = ChannelStore()
+        config = dict(channels_config or {})
+        langgraph_url = _resolve_service_url(config, "langgraph_url", _CHANNELS_LANGGRAPH_URL_ENV, DEFAULT_LANGGRAPH_URL)
+        gateway_url = _resolve_service_url(config, "gateway_url", _CHANNELS_GATEWAY_URL_ENV, DEFAULT_GATEWAY_URL)
+        default_session = config.pop("session", None)
+        channel_sessions = {name: channel_config.get("session") for name, channel_config in config.items() if isinstance(channel_config, dict)}
+        self.manager = ChannelManager(
+            bus=self.bus,
+            store=self.store,
+            langgraph_url=langgraph_url,
+            gateway_url=gateway_url,
+            default_session=default_session if isinstance(default_session, dict) else None,
+            channel_sessions=channel_sessions,
+        )
+        self._channels: dict[str, Any] = {}  # name -> Channel instance
+        self._config = config
+        self._running = False
+
+    @classmethod
+    def from_app_config(cls) -> ChannelService:
+        """Create a ChannelService from the application config."""
+        from deerflow.config.app_config import get_app_config
+
+        config = get_app_config()
+        channels_config = {}
+        # extra fields are allowed by AppConfig (extra="allow")
+        extra = config.model_extra or {}
+        if "channels" in extra:
+            channels_config = extra["channels"]
+        return cls(channels_config=channels_config)
+
+    async def start(self) -> None:
+        """Start the manager and all enabled channels."""
+        if self._running:
+            return
+
+        await self.manager.start()
+
+        for name, channel_config in self._config.items():
+            if not isinstance(channel_config, dict):
+                continue
+            if not channel_config.get("enabled", False):
+                logger.info("Channel %s is disabled, skipping", name)
+                continue
+
+            await self._start_channel(name, channel_config)
+
+        self._running = True
+        logger.info("ChannelService started with channels: %s", list(self._channels.keys()))
+
+    async def stop(self) -> None:
+        """Stop all channels and the manager."""
+        for name, channel in list(self._channels.items()):
+            try:
+                await channel.stop()
+                logger.info("Channel %s stopped", name)
+            except Exception:
+                logger.exception("Error stopping channel %s", name)
+        self._channels.clear()
+
+        await self.manager.stop()
+        self._running = False
+        logger.info("ChannelService stopped")
+
+    async def restart_channel(self, name: str) -> bool:
+        """Restart a specific channel. Returns True if successful."""
+        if name in self._channels:
+            try:
+                await self._channels[name].stop()
+            except Exception:
+                logger.exception("Error stopping channel %s for restart", name)
+            del self._channels[name]
+
+        config = self._config.get(name)
+        if not config or not isinstance(config, dict):
+            logger.warning("No config for channel %s", name)
+            return False
+
+        return await self._start_channel(name, config)
+
+    async def _start_channel(self, name: str, config: dict[str, Any]) -> bool:
+        """Instantiate and start a single channel."""
+        import_path = _CHANNEL_REGISTRY.get(name)
+        if not import_path:
+            logger.warning("Unknown channel type: %s", name)
+            return False
+
+        try:
+            from deerflow.reflection import resolve_class
+
+            channel_cls = resolve_class(import_path, base_class=None)
+        except Exception:
+            logger.exception("Failed to import channel class for %s", name)
+            return False
+
+        try:
+            channel = channel_cls(bus=self.bus, config=config)
+            await channel.start()
+            self._channels[name] = channel
+            logger.info("Channel %s started", name)
+            return True
+        except Exception:
+            logger.exception("Failed to start channel %s", name)
+            return False
+
+    def get_status(self) -> dict[str, Any]:
+        """Return status information for all channels."""
+        channels_status = {}
+        for name in _CHANNEL_REGISTRY:
+            config = self._config.get(name, {})
+            enabled = isinstance(config, dict) and config.get("enabled", False)
+            running = name in self._channels and self._channels[name].is_running
+            channels_status[name] = {
+                "enabled": enabled,
+                "running": running,
+            }
+        return {
+            "service_running": self._running,
+            "channels": channels_status,
+        }
+
+    def get_channel(self, name: str) -> Channel | None:
+        """Return a running channel instance by name when available."""
+        return self._channels.get(name)
+
+
+# -- singleton access -------------------------------------------------------
+
+_channel_service: ChannelService | None = None
+
+
+def get_channel_service() -> ChannelService | None:
+    """Get the singleton ChannelService instance (if started)."""
+    return _channel_service
+
+
+async def start_channel_service() -> ChannelService:
+    """Create and start the global ChannelService from app config."""
+    global _channel_service
+    if _channel_service is not None:
+        return _channel_service
+    _channel_service = ChannelService.from_app_config()
+    await _channel_service.start()
+    return _channel_service
+
+
+async def stop_channel_service() -> None:
+    """Stop the global ChannelService."""
+    global _channel_service
+    if _channel_service is not None:
+        await _channel_service.stop()
+        _channel_service = None

backend/app/channels/slack.py

@@ -0,0 +1,246 @@
+"""Slack channel — connects via Socket Mode (no public IP needed)."""
+
+from __future__ import annotations
+
+import asyncio
+import logging
+from typing import Any
+
+from markdown_to_mrkdwn import SlackMarkdownConverter
+
+from app.channels.base import Channel
+from app.channels.message_bus import InboundMessageType, MessageBus, OutboundMessage, ResolvedAttachment
+
+logger = logging.getLogger(__name__)
+
+_slack_md_converter = SlackMarkdownConverter()
+
+
+class SlackChannel(Channel):
+    """Slack IM channel using Socket Mode (WebSocket, no public IP).
+
+    Configuration keys (in ``config.yaml`` under ``channels.slack``):
+        - ``bot_token``: Slack Bot User OAuth Token (xoxb-...).
+        - ``app_token``: Slack App-Level Token (xapp-...) for Socket Mode.
+        - ``allowed_users``: (optional) List of allowed Slack user IDs. Empty = allow all.
+    """
+
+    def __init__(self, bus: MessageBus, config: dict[str, Any]) -> None:
+        super().__init__(name="slack", bus=bus, config=config)
+        self._socket_client = None
+        self._web_client = None
+        self._loop: asyncio.AbstractEventLoop | None = None
+        self._allowed_users: set[str] = {str(user_id) for user_id in config.get("allowed_users", [])}
+
+    async def start(self) -> None:
+        if self._running:
+            return
+
+        try:
+            from slack_sdk import WebClient
+            from slack_sdk.socket_mode import SocketModeClient
+            from slack_sdk.socket_mode.response import SocketModeResponse
+        except ImportError:
+            logger.error("slack-sdk is not installed. Install it with: uv add slack-sdk")
+            return
+
+        self._SocketModeResponse = SocketModeResponse
+
+        bot_token = self.config.get("bot_token", "")
+        app_token = self.config.get("app_token", "")
+
+        if not bot_token or not app_token:
+            logger.error("Slack channel requires bot_token and app_token")
+            return
+
+        self._web_client = WebClient(token=bot_token)
+        self._socket_client = SocketModeClient(
+            app_token=app_token,
+            web_client=self._web_client,
+        )
+        self._loop = asyncio.get_event_loop()
+
+        self._socket_client.socket_mode_request_listeners.append(self._on_socket_event)
+
+        self._running = True
+        self.bus.subscribe_outbound(self._on_outbound)
+
+        # Start socket mode in background thread
+        asyncio.get_event_loop().run_in_executor(None, self._socket_client.connect)
+        logger.info("Slack channel started")
+
+    async def stop(self) -> None:
+        self._running = False
+        self.bus.unsubscribe_outbound(self._on_outbound)
+        if self._socket_client:
+            self._socket_client.close()
+            self._socket_client = None
+        logger.info("Slack channel stopped")
+
+    async def send(self, msg: OutboundMessage, *, _max_retries: int = 3) -> None:
+        if not self._web_client:
+            return
+
+        kwargs: dict[str, Any] = {
+            "channel": msg.chat_id,
+            "text": _slack_md_converter.convert(msg.text),
+        }
+        if msg.thread_ts:
+            kwargs["thread_ts"] = msg.thread_ts
+
+        last_exc: Exception | None = None
+        for attempt in range(_max_retries):
+            try:
+                await asyncio.to_thread(self._web_client.chat_postMessage, **kwargs)
+                # Add a completion reaction to the thread root
+                if msg.thread_ts:
+                    await asyncio.to_thread(
+                        self._add_reaction,
+                        msg.chat_id,
+                        msg.thread_ts,
+                        "white_check_mark",
+                    )
+                return
+            except Exception as exc:
+                last_exc = exc
+                if attempt < _max_retries - 1:
+                    delay = 2**attempt  # 1s, 2s
+                    logger.warning(
+                        "[Slack] send failed (attempt %d/%d), retrying in %ds: %s",
+                        attempt + 1,
+                        _max_retries,
+                        delay,
+                        exc,
+                    )
+                    await asyncio.sleep(delay)
+
+        logger.error("[Slack] send failed after %d attempts: %s", _max_retries, last_exc)
+        # Add failure reaction on error
+        if msg.thread_ts:
+            try:
+                await asyncio.to_thread(
+                    self._add_reaction,
+                    msg.chat_id,
+                    msg.thread_ts,
+                    "x",
+                )
+            except Exception:
+                pass
+        if last_exc is None:
+            raise RuntimeError("Slack send failed without an exception from any attempt")
+        raise last_exc
+
+    async def send_file(self, msg: OutboundMessage, attachment: ResolvedAttachment) -> bool:
+        if not self._web_client:
+            return False
+
+        try:
+            kwargs: dict[str, Any] = {
+                "channel": msg.chat_id,
+                "file": str(attachment.actual_path),
+                "filename": attachment.filename,
+                "title": attachment.filename,
+            }
+            if msg.thread_ts:
+                kwargs["thread_ts"] = msg.thread_ts
+
+            await asyncio.to_thread(self._web_client.files_upload_v2, **kwargs)
+            logger.info("[Slack] file uploaded: %s to channel=%s", attachment.filename, msg.chat_id)
+            return True
+        except Exception:
+            logger.exception("[Slack] failed to upload file: %s", attachment.filename)
+            return False
+
+    # -- internal ----------------------------------------------------------
+
+    def _add_reaction(self, channel_id: str, timestamp: str, emoji: str) -> None:
+        """Add an emoji reaction to a message (best-effort, non-blocking)."""
+        if not self._web_client:
+            return
+        try:
+            self._web_client.reactions_add(
+                channel=channel_id,
+                timestamp=timestamp,
+                name=emoji,
+            )
+        except Exception as exc:
+            if "already_reacted" not in str(exc):
+                logger.warning("[Slack] failed to add reaction %s: %s", emoji, exc)
+
+    def _send_running_reply(self, channel_id: str, thread_ts: str) -> None:
+        """Send a 'Working on it......' reply in the thread (called from SDK thread)."""
+        if not self._web_client:
+            return
+        try:
+            self._web_client.chat_postMessage(
+                channel=channel_id,
+                text=":hourglass_flowing_sand: Working on it...",
+                thread_ts=thread_ts,
+            )
+            logger.info("[Slack] 'Working on it...' reply sent in channel=%s, thread_ts=%s", channel_id, thread_ts)
+        except Exception:
+            logger.exception("[Slack] failed to send running reply in channel=%s", channel_id)
+
+    def _on_socket_event(self, client, req) -> None:
+        """Called by slack-sdk for each Socket Mode event."""
+        try:
+            # Acknowledge the event
+            response = self._SocketModeResponse(envelope_id=req.envelope_id)
+            client.send_socket_mode_response(response)
+
+            event_type = req.type
+            if event_type != "events_api":
+                return
+
+            event = req.payload.get("event", {})
+            etype = event.get("type", "")
+
+            # Handle message events (DM or @mention)
+            if etype in ("message", "app_mention"):
+                self._handle_message_event(event)
+
+        except Exception:
+            logger.exception("Error processing Slack event")
+
+    def _handle_message_event(self, event: dict) -> None:
+        # Ignore bot messages
+        if event.get("bot_id") or event.get("subtype"):
+            return
+
+        user_id = event.get("user", "")
+
+        # Check allowed users
+        if self._allowed_users and user_id not in self._allowed_users:
+            logger.debug("Ignoring message from non-allowed user: %s", user_id)
+            return
+
+        text = event.get("text", "").strip()
+        if not text:
+            return
+
+        channel_id = event.get("channel", "")
+        thread_ts = event.get("thread_ts") or event.get("ts", "")
+
+        if text.startswith("/"):
+            msg_type = InboundMessageType.COMMAND
+        else:
+            msg_type = InboundMessageType.CHAT
+
+        # topic_id: use thread_ts as the topic identifier.
+        # For threaded messages, thread_ts is the root message ts (shared topic).
+        # For non-threaded messages, thread_ts is the message's own ts (new topic).
+        inbound = self._make_inbound(
+            chat_id=channel_id,
+            user_id=user_id,
+            text=text,
+            msg_type=msg_type,
+            thread_ts=thread_ts,
+        )
+        inbound.topic_id = thread_ts
+
+        if self._loop and self._loop.is_running():
+            # Acknowledge with an eyes reaction
+            self._add_reaction(channel_id, event.get("ts", thread_ts), "eyes")
+            # Send "running" reply first (fire-and-forget from SDK thread)
+            self._send_running_reply(channel_id, thread_ts)
+            asyncio.run_coroutine_threadsafe(self.bus.publish_inbound(inbound), self._loop)

backend/app/channels/store.py

@@ -0,0 +1,153 @@
+"""ChannelStore — persists IM chat-to-DeerFlow thread mappings."""
+
+from __future__ import annotations
+
+import json
+import logging
+import tempfile
+import threading
+import time
+from pathlib import Path
+from typing import Any
+
+logger = logging.getLogger(__name__)
+
+
+class ChannelStore:
+    """JSON-file-backed store that maps IM conversations to DeerFlow threads.
+
+    Data layout (on disk)::
+
+        {
+            "<channel_name>:<chat_id>": {
+                "thread_id": "<uuid>",
+                "user_id": "<platform_user>",
+                "created_at": 1700000000.0,
+                "updated_at": 1700000000.0
+            },
+            ...
+        }
+
+    The store is intentionally simple — a single JSON file that is atomically
+    rewritten on every mutation. For production workloads with high concurrency,
+    this can be swapped for a proper database backend.
+    """
+
+    def __init__(self, path: str | Path | None = None) -> None:
+        if path is None:
+            from deerflow.config.paths import get_paths
+
+            path = Path(get_paths().base_dir) / "channels" / "store.json"
+        self._path = Path(path)
+        self._path.parent.mkdir(parents=True, exist_ok=True)
+        self._data: dict[str, dict[str, Any]] = self._load()
+        self._lock = threading.Lock()
+
+    # -- persistence -------------------------------------------------------
+
+    def _load(self) -> dict[str, dict[str, Any]]:
+        if self._path.exists():
+            try:
+                return json.loads(self._path.read_text(encoding="utf-8"))
+            except (json.JSONDecodeError, OSError):
+                logger.warning("Corrupt channel store at %s, starting fresh", self._path)
+        return {}
+
+    def _save(self) -> None:
+        fd = tempfile.NamedTemporaryFile(
+            mode="w",
+            dir=self._path.parent,
+            suffix=".tmp",
+            delete=False,
+        )
+        try:
+            json.dump(self._data, fd, indent=2)
+            fd.close()
+            Path(fd.name).replace(self._path)
+        except BaseException:
+            fd.close()
+            Path(fd.name).unlink(missing_ok=True)
+            raise
+
+    # -- key helpers -------------------------------------------------------
+
+    @staticmethod
+    def _key(channel_name: str, chat_id: str, topic_id: str | None = None) -> str:
+        if topic_id:
+            return f"{channel_name}:{chat_id}:{topic_id}"
+        return f"{channel_name}:{chat_id}"
+
+    # -- public API --------------------------------------------------------
+
+    def get_thread_id(self, channel_name: str, chat_id: str, topic_id: str | None = None) -> str | None:
+        """Look up the DeerFlow thread_id for a given IM conversation/topic."""
+        entry = self._data.get(self._key(channel_name, chat_id, topic_id))
+        return entry["thread_id"] if entry else None
+
+    def set_thread_id(
+        self,
+        channel_name: str,
+        chat_id: str,
+        thread_id: str,
+        *,
+        topic_id: str | None = None,
+        user_id: str = "",
+    ) -> None:
+        """Create or update the mapping for an IM conversation/topic."""
+        with self._lock:
+            key = self._key(channel_name, chat_id, topic_id)
+            now = time.time()
+            existing = self._data.get(key)
+            self._data[key] = {
+                "thread_id": thread_id,
+                "user_id": user_id,
+                "created_at": existing["created_at"] if existing else now,
+                "updated_at": now,
+            }
+            self._save()
+
+    def remove(self, channel_name: str, chat_id: str, topic_id: str | None = None) -> bool:
+        """Remove a mapping.
+
+        If ``topic_id`` is provided, only that specific conversation/topic mapping is removed.
+        If ``topic_id`` is omitted, all mappings whose key starts with
+        ``"<channel_name>:<chat_id>"`` (including topic-specific ones) are removed.
+
+        Returns True if at least one mapping was removed.
+        """
+        with self._lock:
+            # Remove a specific conversation/topic mapping.
+            if topic_id is not None:
+                key = self._key(channel_name, chat_id, topic_id)
+                if key in self._data:
+                    del self._data[key]
+                    self._save()
+                    return True
+                return False
+
+            # Remove all mappings for this channel/chat_id (base and any topic-specific keys).
+            prefix = self._key(channel_name, chat_id)
+            keys_to_delete = [k for k in self._data if k == prefix or k.startswith(prefix + ":")]
+            if not keys_to_delete:
+                return False
+
+            for k in keys_to_delete:
+                del self._data[k]
+            self._save()
+            return True
+
+    def list_entries(self, channel_name: str | None = None) -> list[dict[str, Any]]:
+        """List all stored mappings, optionally filtered by channel."""
+        results = []
+        for key, entry in self._data.items():
+            parts = key.split(":", 2)
+            ch = parts[0]
+            chat = parts[1] if len(parts) > 1 else ""
+            topic = parts[2] if len(parts) > 2 else None
+            if channel_name and ch != channel_name:
+                continue
+            item: dict[str, Any] = {"channel_name": ch, "chat_id": chat, **entry}
+            if topic is not None:
+                item["topic_id"] = topic
+            results.append(item)
+        return results

backend/app/channels/telegram.py

@@ -0,0 +1,317 @@
+"""Telegram channel — connects via long-polling (no public IP needed)."""
+
+from __future__ import annotations
+
+import asyncio
+import logging
+import threading
+from typing import Any
+
+from app.channels.base import Channel
+from app.channels.message_bus import InboundMessage, InboundMessageType, MessageBus, OutboundMessage, ResolvedAttachment
+
+logger = logging.getLogger(__name__)
+
+
+class TelegramChannel(Channel):
+    """Telegram bot channel using long-polling.
+
+    Configuration keys (in ``config.yaml`` under ``channels.telegram``):
+        - ``bot_token``: Telegram Bot API token (from @BotFather).
+        - ``allowed_users``: (optional) List of allowed Telegram user IDs. Empty = allow all.
+    """
+
+    def __init__(self, bus: MessageBus, config: dict[str, Any]) -> None:
+        super().__init__(name="telegram", bus=bus, config=config)
+        self._application = None
+        self._thread: threading.Thread | None = None
+        self._tg_loop: asyncio.AbstractEventLoop | None = None
+        self._main_loop: asyncio.AbstractEventLoop | None = None
+        self._allowed_users: set[int] = set()
+        for uid in config.get("allowed_users", []):
+            try:
+                self._allowed_users.add(int(uid))
+            except (ValueError, TypeError):
+                pass
+        # chat_id -> last sent message_id for threaded replies
+        self._last_bot_message: dict[str, int] = {}
+
+    async def start(self) -> None:
+        if self._running:
+            return
+
+        try:
+            from telegram.ext import ApplicationBuilder, CommandHandler, MessageHandler, filters
+        except ImportError:
+            logger.error("python-telegram-bot is not installed. Install it with: uv add python-telegram-bot")
+            return
+
+        bot_token = self.config.get("bot_token", "")
+        if not bot_token:
+            logger.error("Telegram channel requires bot_token")
+            return
+
+        self._main_loop = asyncio.get_event_loop()
+        self._running = True
+        self.bus.subscribe_outbound(self._on_outbound)
+
+        # Build the application
+        app = ApplicationBuilder().token(bot_token).build()
+
+        # Command handlers
+        app.add_handler(CommandHandler("start", self._cmd_start))
+        app.add_handler(CommandHandler("new", self._cmd_generic))
+        app.add_handler(CommandHandler("status", self._cmd_generic))
+        app.add_handler(CommandHandler("models", self._cmd_generic))
+        app.add_handler(CommandHandler("memory", self._cmd_generic))
+        app.add_handler(CommandHandler("help", self._cmd_generic))
+
+        # General message handler
+        app.add_handler(MessageHandler(filters.TEXT & ~filters.COMMAND, self._on_text))
+
+        self._application = app
+
+        # Run polling in a dedicated thread with its own event loop
+        self._thread = threading.Thread(target=self._run_polling, daemon=True)
+        self._thread.start()
+        logger.info("Telegram channel started")
+
+    async def stop(self) -> None:
+        self._running = False
+        self.bus.unsubscribe_outbound(self._on_outbound)
+        if self._tg_loop and self._tg_loop.is_running():
+            self._tg_loop.call_soon_threadsafe(self._tg_loop.stop)
+        if self._thread:
+            self._thread.join(timeout=10)
+            self._thread = None
+        self._application = None
+        logger.info("Telegram channel stopped")
+
+    async def send(self, msg: OutboundMessage, *, _max_retries: int = 3) -> None:
+        if not self._application:
+            return
+
+        try:
+            chat_id = int(msg.chat_id)
+        except (ValueError, TypeError):
+            logger.error("Invalid Telegram chat_id: %s", msg.chat_id)
+            return
+
+        kwargs: dict[str, Any] = {"chat_id": chat_id, "text": msg.text}
+
+        # Reply to the last bot message in this chat for threading
+        reply_to = self._last_bot_message.get(msg.chat_id)
+        if reply_to:
+            kwargs["reply_to_message_id"] = reply_to
+
+        bot = self._application.bot
+        last_exc: Exception | None = None
+        for attempt in range(_max_retries):
+            try:
+                sent = await bot.send_message(**kwargs)
+                self._last_bot_message[msg.chat_id] = sent.message_id
+                return
+            except Exception as exc:
+                last_exc = exc
+                if attempt < _max_retries - 1:
+                    delay = 2**attempt  # 1s, 2s
+                    logger.warning(
+                        "[Telegram] send failed (attempt %d/%d), retrying in %ds: %s",
+                        attempt + 1,
+                        _max_retries,
+                        delay,
+                        exc,
+                    )
+                    await asyncio.sleep(delay)
+
+        logger.error("[Telegram] send failed after %d attempts: %s", _max_retries, last_exc)
+        if last_exc is None:
+            raise RuntimeError("Telegram send failed without an exception from any attempt")
+        raise last_exc
+
+    async def send_file(self, msg: OutboundMessage, attachment: ResolvedAttachment) -> bool:
+        if not self._application:
+            return False
+
+        try:
+            chat_id = int(msg.chat_id)
+        except (ValueError, TypeError):
+            logger.error("[Telegram] Invalid chat_id: %s", msg.chat_id)
+            return False
+
+        # Telegram limits: 10MB for photos, 50MB for documents
+        if attachment.size > 50 * 1024 * 1024:
+            logger.warning("[Telegram] file too large (%d bytes), skipping: %s", attachment.size, attachment.filename)
+            return False
+
+        bot = self._application.bot
+        reply_to = self._last_bot_message.get(msg.chat_id)
+
+        try:
+            if attachment.is_image and attachment.size <= 10 * 1024 * 1024:
+                with open(attachment.actual_path, "rb") as f:
+                    kwargs: dict[str, Any] = {"chat_id": chat_id, "photo": f}
+                    if reply_to:
+                        kwargs["reply_to_message_id"] = reply_to
+                    sent = await bot.send_photo(**kwargs)
+            else:
+                from telegram import InputFile
+
+                with open(attachment.actual_path, "rb") as f:
+                    input_file = InputFile(f, filename=attachment.filename)
+                    kwargs = {"chat_id": chat_id, "document": input_file}
+                    if reply_to:
+                        kwargs["reply_to_message_id"] = reply_to
+                    sent = await bot.send_document(**kwargs)
+
+            self._last_bot_message[msg.chat_id] = sent.message_id
+            logger.info("[Telegram] file sent: %s to chat=%s", attachment.filename, msg.chat_id)
+            return True
+        except Exception:
+            logger.exception("[Telegram] failed to send file: %s", attachment.filename)
+            return False
+
+    # -- helpers -----------------------------------------------------------
+
+    async def _send_running_reply(self, chat_id: str, reply_to_message_id: int) -> None:
+        """Send a 'Working on it...' reply to the user's message."""
+        if not self._application:
+            return
+        try:
+            bot = self._application.bot
+            await bot.send_message(
+                chat_id=int(chat_id),
+                text="Working on it...",
+                reply_to_message_id=reply_to_message_id,
+            )
+            logger.info("[Telegram] 'Working on it...' reply sent in chat=%s", chat_id)
+        except Exception:
+            logger.exception("[Telegram] failed to send running reply in chat=%s", chat_id)
+
+    # -- internal ----------------------------------------------------------
+    @staticmethod
+    def _log_future_error(fut, name: str, msg_id: str):
+        try:
+            exc = fut.exception()
+            if exc:
+                logger.error("[Telegram] %s failed for msg_id=%s: %s", name, msg_id, exc)
+        except Exception:
+            logger.exception("[Telegram] Failed to inspect future for %s (msg_id=%s)", name, msg_id)
+
+    def _run_polling(self) -> None:
+        """Run telegram polling in a dedicated thread."""
+        self._tg_loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(self._tg_loop)
+        try:
+            # Cannot use run_polling() because it calls add_signal_handler(),
+            # which only works in the main thread.  Instead, manually
+            # initialize the application and start the updater.
+            self._tg_loop.run_until_complete(self._application.initialize())
+            self._tg_loop.run_until_complete(self._application.start())
+            self._tg_loop.run_until_complete(self._application.updater.start_polling())
+            self._tg_loop.run_forever()
+        except Exception:
+            if self._running:
+                logger.exception("Telegram polling error")
+        finally:
+            # Graceful shutdown
+            try:
+                if self._application.updater.running:
+                    self._tg_loop.run_until_complete(self._application.updater.stop())
+                self._tg_loop.run_until_complete(self._application.stop())
+                self._tg_loop.run_until_complete(self._application.shutdown())
+            except Exception:
+                logger.exception("Error during Telegram shutdown")
+
+    def _check_user(self, user_id: int) -> bool:
+        if not self._allowed_users:
+            return True
+        return user_id in self._allowed_users
+
+    async def _cmd_start(self, update, context) -> None:
+        """Handle /start command."""
+        if not self._check_user(update.effective_user.id):
+            return
+        await update.message.reply_text("Welcome to DeerFlow! Send me a message to start a conversation.\nType /help for available commands.")
+
+    async def _process_incoming_with_reply(self, chat_id: str, msg_id: int, inbound: InboundMessage) -> None:
+        await self._send_running_reply(chat_id, msg_id)
+        await self.bus.publish_inbound(inbound)
+
+    async def _cmd_generic(self, update, context) -> None:
+        """Forward slash commands to the channel manager."""
+        if not self._check_user(update.effective_user.id):
+            return
+
+        text = update.message.text
+        chat_id = str(update.effective_chat.id)
+        user_id = str(update.effective_user.id)
+        msg_id = str(update.message.message_id)
+
+        # Use the same topic_id logic as _on_text so that commands
+        # like /new target the correct thread mapping.
+        if update.effective_chat.type == "private":
+            topic_id = None
+        else:
+            reply_to = update.message.reply_to_message
+            if reply_to:
+                topic_id = str(reply_to.message_id)
+            else:
+                topic_id = msg_id
+
+        inbound = self._make_inbound(
+            chat_id=chat_id,
+            user_id=user_id,
+            text=text,
+            msg_type=InboundMessageType.COMMAND,
+            thread_ts=msg_id,
+        )
+        inbound.topic_id = topic_id
+
+        if self._main_loop and self._main_loop.is_running():
+            fut = asyncio.run_coroutine_threadsafe(self._process_incoming_with_reply(chat_id, update.message.message_id, inbound), self._main_loop)
+            fut.add_done_callback(lambda f: self._log_future_error(f, "process_incoming_with_reply", update.message.message_id))
+        else:
+            logger.warning("[Telegram] Main loop not running. Cannot publish inbound message.")
+
+    async def _on_text(self, update, context) -> None:
+        """Handle regular text messages."""
+        if not self._check_user(update.effective_user.id):
+            return
+
+        text = update.message.text.strip()
+        if not text:
+            return
+
+        chat_id = str(update.effective_chat.id)
+        user_id = str(update.effective_user.id)
+        msg_id = str(update.message.message_id)
+
+        # topic_id determines which DeerFlow thread the message maps to.
+        # In private chats, use None so that all messages share a single
+        # thread (the store key becomes "channel:chat_id").
+        # In group chats, use the reply-to message id or the current
+        # message id to keep separate conversation threads.
+        if update.effective_chat.type == "private":
+            topic_id = None
+        else:
+            reply_to = update.message.reply_to_message
+            if reply_to:
+                topic_id = str(reply_to.message_id)
+            else:
+                topic_id = msg_id
+
+        inbound = self._make_inbound(
+            chat_id=chat_id,
+            user_id=user_id,
+            text=text,
+            msg_type=InboundMessageType.CHAT,
+            thread_ts=msg_id,
+        )
+        inbound.topic_id = topic_id
+
+        if self._main_loop and self._main_loop.is_running():
+            fut = asyncio.run_coroutine_threadsafe(self._process_incoming_with_reply(chat_id, update.message.message_id, inbound), self._main_loop)
+            fut.add_done_callback(lambda f: self._log_future_error(f, "process_incoming_with_reply", update.message.message_id))
+        else:
+            logger.warning("[Telegram] Main loop not running. Cannot publish inbound message.")

backend/app/channels/wecom.py

@@ -0,0 +1,394 @@
+from __future__ import annotations
+
+import asyncio
+import base64
+import hashlib
+import logging
+from collections.abc import Awaitable, Callable
+from typing import Any, cast
+
+from app.channels.base import Channel
+from app.channels.message_bus import (
+    InboundMessageType,
+    MessageBus,
+    OutboundMessage,
+    ResolvedAttachment,
+)
+
+logger = logging.getLogger(__name__)
+
+
+class WeComChannel(Channel):
+    def __init__(self, bus: MessageBus, config: dict[str, Any]) -> None:
+        super().__init__(name="wecom", bus=bus, config=config)
+        self._bot_id: str | None = None
+        self._bot_secret: str | None = None
+        self._ws_client = None
+        self._ws_task: asyncio.Task | None = None
+        self._ws_frames: dict[str, dict[str, Any]] = {}
+        self._ws_stream_ids: dict[str, str] = {}
+        self._working_message = "Working on it..."
+
+    def _clear_ws_context(self, thread_ts: str | None) -> None:
+        if not thread_ts:
+            return
+        self._ws_frames.pop(thread_ts, None)
+        self._ws_stream_ids.pop(thread_ts, None)
+
+    async def _send_ws_upload_command(self, req_id: str, body: dict[str, Any], cmd: str) -> dict[str, Any]:
+        if not self._ws_client:
+            raise RuntimeError("WeCom WebSocket client is not available")
+
+        ws_manager = getattr(self._ws_client, "_ws_manager", None)
+        send_reply = getattr(ws_manager, "send_reply", None)
+        if not callable(send_reply):
+            raise RuntimeError("Installed wecom-aibot-python-sdk does not expose the WebSocket media upload API expected by DeerFlow. Use wecom-aibot-python-sdk==0.1.6 or update the adapter.")
+
+        send_reply_async = cast(Callable[[str, dict[str, Any], str], Awaitable[dict[str, Any]]], send_reply)
+        return await send_reply_async(req_id, body, cmd)
+
+    async def start(self) -> None:
+        if self._running:
+            return
+
+        bot_id = self.config.get("bot_id")
+        bot_secret = self.config.get("bot_secret")
+        working_message = self.config.get("working_message")
+
+        self._bot_id = bot_id if isinstance(bot_id, str) and bot_id else None
+        self._bot_secret = bot_secret if isinstance(bot_secret, str) and bot_secret else None
+        self._working_message = working_message if isinstance(working_message, str) and working_message else "Working on it..."
+
+        if not self._bot_id or not self._bot_secret:
+            logger.error("WeCom channel requires bot_id and bot_secret")
+            return
+
+        try:
+            from aibot import WSClient, WSClientOptions
+        except ImportError:
+            logger.error("wecom-aibot-python-sdk is not installed. Install it with: uv add wecom-aibot-python-sdk")
+            return
+        else:
+            self._ws_client = WSClient(WSClientOptions(bot_id=self._bot_id, secret=self._bot_secret, logger=logger))
+            self._ws_client.on("message.text", self._on_ws_text)
+            self._ws_client.on("message.mixed", self._on_ws_mixed)
+            self._ws_client.on("message.image", self._on_ws_image)
+            self._ws_client.on("message.file", self._on_ws_file)
+            self._ws_task = asyncio.create_task(self._ws_client.connect())
+
+            self._running = True
+            self.bus.subscribe_outbound(self._on_outbound)
+        logger.info("WeCom channel started")
+
+    async def stop(self) -> None:
+        self._running = False
+        self.bus.unsubscribe_outbound(self._on_outbound)
+        if self._ws_task:
+            try:
+                self._ws_task.cancel()
+            except Exception:
+                pass
+            self._ws_task = None
+        if self._ws_client:
+            try:
+                self._ws_client.disconnect()
+            except Exception:
+                pass
+        self._ws_client = None
+        self._ws_frames.clear()
+        self._ws_stream_ids.clear()
+        logger.info("WeCom channel stopped")
+
+    async def send(self, msg: OutboundMessage, *, _max_retries: int = 3) -> None:
+        if self._ws_client:
+            await self._send_ws(msg, _max_retries=_max_retries)
+            return
+        logger.warning("[WeCom] send called but WebSocket client is not available")
+
+    async def _on_outbound(self, msg: OutboundMessage) -> None:
+        if msg.channel_name != self.name:
+            return
+
+        try:
+            await self.send(msg)
+        except Exception:
+            logger.exception("Failed to send outbound message on channel %s", self.name)
+            if msg.is_final:
+                self._clear_ws_context(msg.thread_ts)
+            return
+
+        for attachment in msg.attachments:
+            try:
+                success = await self.send_file(msg, attachment)
+                if not success:
+                    logger.warning("[%s] file upload skipped for %s", self.name, attachment.filename)
+            except Exception:
+                logger.exception("[%s] failed to upload file %s", self.name, attachment.filename)
+
+        if msg.is_final:
+            self._clear_ws_context(msg.thread_ts)
+
+    async def send_file(self, msg: OutboundMessage, attachment: ResolvedAttachment) -> bool:
+        if not msg.is_final:
+            return True
+        if not self._ws_client:
+            return False
+        if not msg.thread_ts:
+            return False
+        frame = self._ws_frames.get(msg.thread_ts)
+        if not frame:
+            return False
+
+        media_type = "image" if attachment.is_image else "file"
+        size_limit = 2 * 1024 * 1024 if attachment.is_image else 20 * 1024 * 1024
+        if attachment.size > size_limit:
+            logger.warning(
+                "[WeCom] %s too large (%d bytes), skipping: %s",
+                media_type,
+                attachment.size,
+                attachment.filename,
+            )
+            return False
+
+        try:
+            media_id = await self._upload_media_ws(
+                media_type=media_type,
+                filename=attachment.filename,
+                path=str(attachment.actual_path),
+                size=attachment.size,
+            )
+            if not media_id:
+                return False
+
+            body = {media_type: {"media_id": media_id}, "msgtype": media_type}
+            await self._ws_client.reply(frame, body)
+            logger.debug("[WeCom] %s sent via ws: %s", media_type, attachment.filename)
+            return True
+        except Exception:
+            logger.exception("[WeCom] failed to upload/send file via ws: %s", attachment.filename)
+            return False
+
+    async def _on_ws_text(self, frame: dict[str, Any]) -> None:
+        body = frame.get("body", {}) or {}
+        text = ((body.get("text") or {}).get("content") or "").strip()
+        quote = body.get("quote", {}).get("text", {}).get("content", "").strip()
+        if not text and not quote:
+            return
+        await self._publish_ws_inbound(frame, text + (f"\nQuote message: {quote}" if quote else ""))
+
+    async def _on_ws_mixed(self, frame: dict[str, Any]) -> None:
+        body = frame.get("body", {}) or {}
+        mixed = body.get("mixed") or {}
+        items = mixed.get("msg_item") or []
+        parts: list[str] = []
+        files: list[dict[str, Any]] = []
+        for item in items:
+            item_type = (item or {}).get("msgtype")
+            if item_type == "text":
+                content = (((item or {}).get("text") or {}).get("content") or "").strip()
+                if content:
+                    parts.append(content)
+            elif item_type in ("image", "file"):
+                payload = (item or {}).get(item_type) or {}
+                url = payload.get("url")
+                aeskey = payload.get("aeskey")
+                if isinstance(url, str) and url:
+                    files.append(
+                        {
+                            "type": item_type,
+                            "url": url,
+                            "aeskey": (aeskey if isinstance(aeskey, str) and aeskey else None),
+                        }
+                    )
+        text = "\n\n".join(parts).strip()
+        if not text and not files:
+            return
+        if not text:
+            text = "（receive image/file）"
+        await self._publish_ws_inbound(frame, text, files=files)
+
+    async def _on_ws_image(self, frame: dict[str, Any]) -> None:
+        body = frame.get("body", {}) or {}
+        image = body.get("image") or {}
+        url = image.get("url")
+        aeskey = image.get("aeskey")
+        if not isinstance(url, str) or not url:
+            return
+        await self._publish_ws_inbound(
+            frame,
+            "（receive image ）",
+            files=[
+                {
+                    "type": "image",
+                    "url": url,
+                    "aeskey": aeskey if isinstance(aeskey, str) and aeskey else None,
+                }
+            ],
+        )
+
+    async def _on_ws_file(self, frame: dict[str, Any]) -> None:
+        body = frame.get("body", {}) or {}
+        file_obj = body.get("file") or {}
+        url = file_obj.get("url")
+        aeskey = file_obj.get("aeskey")
+        if not isinstance(url, str) or not url:
+            return
+        await self._publish_ws_inbound(
+            frame,
+            "（receive file）",
+            files=[
+                {
+                    "type": "file",
+                    "url": url,
+                    "aeskey": aeskey if isinstance(aeskey, str) and aeskey else None,
+                }
+            ],
+        )
+
+    async def _publish_ws_inbound(
+        self,
+        frame: dict[str, Any],
+        text: str,
+        *,
+        files: list[dict[str, Any]] | None = None,
+    ) -> None:
+        if not self._ws_client:
+            return
+        try:
+            from aibot import generate_req_id
+        except Exception:
+            return
+
+        body = frame.get("body", {}) or {}
+        msg_id = body.get("msgid")
+        if not msg_id:
+            return
+
+        user_id = (body.get("from") or {}).get("userid")
+
+        inbound_type = InboundMessageType.COMMAND if text.startswith("/") else InboundMessageType.CHAT
+        inbound = self._make_inbound(
+            chat_id=user_id,  # keep user's conversation in memory
+            user_id=user_id,
+            text=text,
+            msg_type=inbound_type,
+            thread_ts=msg_id,
+            files=files or [],
+            metadata={"aibotid": body.get("aibotid"), "chattype": body.get("chattype")},
+        )
+        inbound.topic_id = user_id  # keep the same thread
+
+        stream_id = generate_req_id("stream")
+        self._ws_frames[msg_id] = frame
+        self._ws_stream_ids[msg_id] = stream_id
+
+        try:
+            await self._ws_client.reply_stream(frame, stream_id, self._working_message, False)
+        except Exception:
+            pass
+
+        await self.bus.publish_inbound(inbound)
+
+    async def _send_ws(self, msg: OutboundMessage, *, _max_retries: int = 3) -> None:
+        if not self._ws_client:
+            return
+        try:
+            from aibot import generate_req_id
+        except Exception:
+            generate_req_id = None
+
+        if msg.thread_ts and msg.thread_ts in self._ws_frames:
+            frame = self._ws_frames[msg.thread_ts]
+            stream_id = self._ws_stream_ids.get(msg.thread_ts)
+            if not stream_id and generate_req_id:
+                stream_id = generate_req_id("stream")
+                self._ws_stream_ids[msg.thread_ts] = stream_id
+            if not stream_id:
+                return
+
+            last_exc: Exception | None = None
+            for attempt in range(_max_retries):
+                try:
+                    await self._ws_client.reply_stream(frame, stream_id, msg.text, bool(msg.is_final))
+                    return
+                except Exception as exc:
+                    last_exc = exc
+                    if attempt < _max_retries - 1:
+                        await asyncio.sleep(2**attempt)
+            if last_exc:
+                raise last_exc
+
+        body = {"msgtype": "markdown", "markdown": {"content": msg.text}}
+        last_exc = None
+        for attempt in range(_max_retries):
+            try:
+                await self._ws_client.send_message(msg.chat_id, body)
+                return
+            except Exception as exc:
+                last_exc = exc
+                if attempt < _max_retries - 1:
+                    await asyncio.sleep(2**attempt)
+        if last_exc:
+            raise last_exc
+
+    async def _upload_media_ws(
+        self,
+        *,
+        media_type: str,
+        filename: str,
+        path: str,
+        size: int,
+    ) -> str | None:
+        if not self._ws_client:
+            return None
+        try:
+            from aibot import generate_req_id
+        except Exception:
+            return None
+
+        chunk_size = 512 * 1024
+        total_chunks = (size + chunk_size - 1) // chunk_size
+        if total_chunks < 1 or total_chunks > 100:
+            logger.warning("[WeCom] invalid total_chunks=%d for %s", total_chunks, filename)
+            return None
+
+        md5_hasher = hashlib.md5()
+        with open(path, "rb") as f:
+            for chunk in iter(lambda: f.read(1024 * 1024), b""):
+                md5_hasher.update(chunk)
+        md5 = md5_hasher.hexdigest()
+
+        init_req_id = generate_req_id("aibot_upload_media_init")
+        init_body = {
+            "type": media_type,
+            "filename": filename,
+            "total_size": int(size),
+            "total_chunks": int(total_chunks),
+            "md5": md5,
+        }
+        init_ack = await self._send_ws_upload_command(init_req_id, init_body, "aibot_upload_media_init")
+        upload_id = (init_ack.get("body") or {}).get("upload_id")
+        if not upload_id:
+            logger.warning("[WeCom] upload init returned no upload_id: %s", init_ack)
+            return None
+
+        with open(path, "rb") as f:
+            for idx in range(total_chunks):
+                data = f.read(chunk_size)
+                if not data:
+                    break
+                chunk_req_id = generate_req_id("aibot_upload_media_chunk")
+                chunk_body = {
+                    "upload_id": upload_id,
+                    "chunk_index": int(idx),
+                    "base64_data": base64.b64encode(data).decode("utf-8"),
+                }
+                await self._send_ws_upload_command(chunk_req_id, chunk_body, "aibot_upload_media_chunk")
+
+        finish_req_id = generate_req_id("aibot_upload_media_finish")
+        finish_ack = await self._send_ws_upload_command(finish_req_id, {"upload_id": upload_id}, "aibot_upload_media_finish")
+        media_id = (finish_ack.get("body") or {}).get("media_id")
+        if not media_id:
+            logger.warning("[WeCom] upload finish returned no media_id: %s", finish_ack)
+            return None
+        return media_id

backend/app/gateway/__init__.py

@@ -0,0 +1,4 @@
+from .app import app, create_app
+from .config import GatewayConfig, get_gateway_config
+
+__all__ = ["app", "create_app", "GatewayConfig", "get_gateway_config"]

backend/app/gateway/app.py

@@ -0,0 +1,389 @@
+import logging
+import os
+from collections.abc import AsyncGenerator
+from contextlib import asynccontextmanager
+from datetime import UTC
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.gateway.auth_middleware import AuthMiddleware
+from app.gateway.config import get_gateway_config
+from app.gateway.csrf_middleware import CSRFMiddleware
+from app.gateway.deps import langgraph_runtime
+from app.gateway.routers import (
+    agents,
+    artifacts,
+    assistants_compat,
+    auth,
+    channels,
+    feedback,
+    mcp,
+    memory,
+    models,
+    runs,
+    skills,
+    suggestions,
+    thread_runs,
+    threads,
+    uploads,
+)
+from deerflow.config.app_config import get_app_config
+
+# Configure logging
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
+    datefmt="%Y-%m-%d %H:%M:%S",
+)
+
+logger = logging.getLogger(__name__)
+
+
+async def _ensure_admin_user(app: FastAPI) -> None:
+    """Auto-create the admin user on first boot if no users exist.
+
+    After admin creation, migrate orphan threads from the LangGraph
+    store (metadata.owner_id unset) to the admin account. This is the
+    "no-auth → with-auth" upgrade path: users who ran DeerFlow without
+    authentication have existing LangGraph thread data that needs an
+    owner assigned.
+
+    No SQL persistence migration is needed: the four owner_id columns
+    (threads_meta, runs, run_events, feedback) only come into existence
+    alongside the auth module via create_all, so freshly created tables
+    never contain NULL-owner rows. "Existing persistence DB + new auth"
+    is not a supported upgrade path — fresh install or wipe-and-retry.
+
+    Multi-worker safe: relies on SQLite UNIQUE constraint to resolve
+    races during admin creation. Only the worker that successfully
+    creates/updates the admin prints the password; losers silently skip.
+    """
+    import secrets
+
+    from app.gateway.deps import get_local_provider
+
+    provider = get_local_provider()
+    user_count = await provider.count_users()
+
+    admin = None
+    fresh_admin_created = False
+
+    if user_count == 0:
+        password = secrets.token_urlsafe(16)
+        try:
+            admin = await provider.create_user(email="admin@deerflow.dev", password=password, system_role="admin", needs_setup=True)
+            fresh_admin_created = True
+        except ValueError:
+            return  # Another worker already created the admin.
+    else:
+        # Admin exists but setup never completed — reset password so operator
+        # can always find it in the console without needing the CLI.
+        # Multi-worker guard: if admin was created less than 30s ago, another
+        # worker just created it and will print the password — skip reset.
+        admin = await provider.get_user_by_email("admin@deerflow.dev")
+        if admin and admin.needs_setup:
+            import time
+
+            age = time.time() - admin.created_at.replace(tzinfo=UTC).timestamp()
+            if age >= 30:
+                from app.gateway.auth.credential_file import write_initial_credentials
+                from app.gateway.auth.password import hash_password_async
+
+                password = secrets.token_urlsafe(16)
+                admin.password_hash = await hash_password_async(password)
+                admin.token_version += 1
+                await provider.update_user(admin)
+
+                cred_path = write_initial_credentials(admin.email, password, label="reset")
+                logger.info("=" * 60)
+                logger.info("  Admin account setup incomplete — password reset")
+                logger.info("  Credentials written to: %s (mode 0600)", cred_path)
+                logger.info("  Change it after login: Settings -> Account")
+                logger.info("=" * 60)
+
+    if admin is None:
+        return  # Nothing to bind orphans to.
+
+    admin_id = str(admin.id)
+
+    # LangGraph store orphan migration — non-fatal.
+    # This covers the "no-auth → with-auth" upgrade path for users
+    # whose existing LangGraph thread metadata has no owner_id set.
+    store = getattr(app.state, "store", None)
+    if store is not None:
+        try:
+            migrated = await _migrate_orphaned_threads(store, admin_id)
+            if migrated:
+                logger.info("Migrated %d orphan LangGraph thread(s) to admin", migrated)
+        except Exception:
+            logger.exception("LangGraph thread migration failed (non-fatal)")
+
+    if fresh_admin_created:
+        from app.gateway.auth.credential_file import write_initial_credentials
+
+        cred_path = write_initial_credentials(admin.email, password, label="initial")  # noqa: F821 — defined in the fresh_admin branch
+        logger.info("=" * 60)
+        logger.info("  Admin account created on first boot")
+        logger.info("  Credentials written to: %s (mode 0600)", cred_path)
+        logger.info("  Change it after login: Settings -> Account")
+        logger.info("=" * 60)
+
+
+async def _iter_store_items(store, namespace, *, page_size: int = 500):
+    """Paginated async iterator over a LangGraph store namespace.
+
+    Replaces the old hardcoded ``limit=1000`` call with a cursor-style
+    loop so that environments with more than one page of orphans do
+    not silently lose data. Terminates when a page is empty OR when a
+    short page arrives (indicating the last page).
+    """
+    offset = 0
+    while True:
+        batch = await store.asearch(namespace, limit=page_size, offset=offset)
+        if not batch:
+            return
+        for item in batch:
+            yield item
+        if len(batch) < page_size:
+            return
+        offset += page_size
+
+
+async def _migrate_orphaned_threads(store, admin_user_id: str) -> int:
+    """Migrate LangGraph store threads with no owner_id to the given admin.
+
+    Uses cursor pagination so all orphans are migrated regardless of
+    count. Returns the number of rows migrated.
+    """
+    migrated = 0
+    async for item in _iter_store_items(store, ("threads",)):
+        metadata = item.value.get("metadata", {})
+        if not metadata.get("owner_id"):
+            metadata["owner_id"] = admin_user_id
+            item.value["metadata"] = metadata
+            await store.aput(("threads",), item.key, item.value)
+            migrated += 1
+    return migrated
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
+    """Application lifespan handler."""
+
+    # Load config and check necessary environment variables at startup
+    try:
+        get_app_config()
+        logger.info("Configuration loaded successfully")
+    except Exception as e:
+        error_msg = f"Failed to load configuration during gateway startup: {e}"
+        logger.exception(error_msg)
+        raise RuntimeError(error_msg) from e
+    config = get_gateway_config()
+    logger.info(f"Starting API Gateway on {config.host}:{config.port}")
+
+    # Initialize LangGraph runtime components (StreamBridge, RunManager, checkpointer, store)
+    async with langgraph_runtime(app):
+        logger.info("LangGraph runtime initialised")
+
+        # Ensure admin user exists (auto-create on first boot)
+        # Must run AFTER langgraph_runtime so app.state.store is available for thread migration
+        await _ensure_admin_user(app)
+
+        # Start IM channel service if any channels are configured
+        try:
+            from app.channels.service import start_channel_service
+
+            channel_service = await start_channel_service()
+            logger.info("Channel service started: %s", channel_service.get_status())
+        except Exception:
+            logger.exception("No IM channels configured or channel service failed to start")
+
+        yield
+
+        # Stop channel service on shutdown
+        try:
+            from app.channels.service import stop_channel_service
+
+            await stop_channel_service()
+        except Exception:
+            logger.exception("Failed to stop channel service")
+
+    logger.info("Shutting down API Gateway")
+
+
+def create_app() -> FastAPI:
+    """Create and configure the FastAPI application.
+
+    Returns:
+        Configured FastAPI application instance.
+    """
+
+    app = FastAPI(
+        title="DeerFlow API Gateway",
+        description="""
+## DeerFlow API Gateway
+
+API Gateway for DeerFlow - A LangGraph-based AI agent backend with sandbox execution capabilities.
+
+### Features
+
+- **Models Management**: Query and retrieve available AI models
+- **MCP Configuration**: Manage Model Context Protocol (MCP) server configurations
+- **Memory Management**: Access and manage global memory data for personalized conversations
+- **Skills Management**: Query and manage skills and their enabled status
+- **Artifacts**: Access thread artifacts and generated files
+- **Health Monitoring**: System health check endpoints
+
+### Architecture
+
+LangGraph requests are handled by nginx reverse proxy.
+This gateway provides custom endpoints for models, MCP configuration, skills, and artifacts.
+        """,
+        version="0.1.0",
+        lifespan=lifespan,
+        docs_url="/docs",
+        redoc_url="/redoc",
+        openapi_url="/openapi.json",
+        openapi_tags=[
+            {
+                "name": "models",
+                "description": "Operations for querying available AI models and their configurations",
+            },
+            {
+                "name": "mcp",
+                "description": "Manage Model Context Protocol (MCP) server configurations",
+            },
+            {
+                "name": "memory",
+                "description": "Access and manage global memory data for personalized conversations",
+            },
+            {
+                "name": "skills",
+                "description": "Manage skills and their configurations",
+            },
+            {
+                "name": "artifacts",
+                "description": "Access and download thread artifacts and generated files",
+            },
+            {
+                "name": "uploads",
+                "description": "Upload and manage user files for threads",
+            },
+            {
+                "name": "threads",
+                "description": "Manage DeerFlow thread-local filesystem data",
+            },
+            {
+                "name": "agents",
+                "description": "Create and manage custom agents with per-agent config and prompts",
+            },
+            {
+                "name": "suggestions",
+                "description": "Generate follow-up question suggestions for conversations",
+            },
+            {
+                "name": "channels",
+                "description": "Manage IM channel integrations (Feishu, Slack, Telegram)",
+            },
+            {
+                "name": "assistants-compat",
+                "description": "LangGraph Platform-compatible assistants API (stub)",
+            },
+            {
+                "name": "runs",
+                "description": "LangGraph Platform-compatible runs lifecycle (create, stream, cancel)",
+            },
+            {
+                "name": "health",
+                "description": "Health check and system status endpoints",
+            },
+        ],
+    )
+
+    # Auth: reject unauthenticated requests to non-public paths (fail-closed safety net)
+    app.add_middleware(AuthMiddleware)
+
+    # CSRF: Double Submit Cookie pattern for state-changing requests
+    app.add_middleware(CSRFMiddleware)
+
+    # CORS: when GATEWAY_CORS_ORIGINS is set (dev without nginx), add CORS middleware.
+    # In production, nginx handles CORS and no middleware is needed.
+    cors_origins_env = os.environ.get("GATEWAY_CORS_ORIGINS", "")
+    if cors_origins_env:
+        cors_origins = [o.strip() for o in cors_origins_env.split(",") if o.strip()]
+        # Validate: wildcard origin with credentials is a security misconfiguration
+        for origin in cors_origins:
+            if origin == "*":
+                logger.error("GATEWAY_CORS_ORIGINS contains wildcard '*' with allow_credentials=True. This is a security misconfiguration — browsers will reject the response. Use explicit scheme://host:port origins instead.")
+                cors_origins = [o for o in cors_origins if o != "*"]
+                break
+        if cors_origins:
+            app.add_middleware(
+                CORSMiddleware,
+                allow_origins=cors_origins,
+                allow_credentials=True,
+                allow_methods=["*"],
+                allow_headers=["*"],
+            )
+
+    # Include routers
+    # Models API is mounted at /api/models
+    app.include_router(models.router)
+
+    # MCP API is mounted at /api/mcp
+    app.include_router(mcp.router)
+
+    # Memory API is mounted at /api/memory
+    app.include_router(memory.router)
+
+    # Skills API is mounted at /api/skills
+    app.include_router(skills.router)
+
+    # Artifacts API is mounted at /api/threads/{thread_id}/artifacts
+    app.include_router(artifacts.router)
+
+    # Uploads API is mounted at /api/threads/{thread_id}/uploads
+    app.include_router(uploads.router)
+
+    # Thread cleanup API is mounted at /api/threads/{thread_id}
+    app.include_router(threads.router)
+
+    # Agents API is mounted at /api/agents
+    app.include_router(agents.router)
+
+    # Suggestions API is mounted at /api/threads/{thread_id}/suggestions
+    app.include_router(suggestions.router)
+
+    # Channels API is mounted at /api/channels
+    app.include_router(channels.router)
+
+    # Assistants compatibility API (LangGraph Platform stub)
+    app.include_router(assistants_compat.router)
+
+    # Auth API is mounted at /api/v1/auth
+    app.include_router(auth.router)
+
+    # Feedback API is mounted at /api/threads/{thread_id}/runs/{run_id}/feedback
+    app.include_router(feedback.router)
+
+    # Thread Runs API (LangGraph Platform-compatible runs lifecycle)
+    app.include_router(thread_runs.router)
+
+    # Stateless Runs API (stream/wait without a pre-existing thread)
+    app.include_router(runs.router)
+
+    @app.get("/health", tags=["health"])
+    async def health_check() -> dict:
+        """Health check endpoint.
+
+        Returns:
+            Service health status information.
+        """
+        return {"status": "healthy", "service": "deer-flow-gateway"}
+
+    return app
+
+
+# Create app instance for uvicorn
+app = create_app()

backend/app/gateway/auth/__init__.py

@@ -0,0 +1,42 @@
+"""Authentication module for DeerFlow.
+
+This module provides:
+- JWT-based authentication
+- Provider Factory pattern for extensible auth methods
+- UserRepository interface for storage backends (SQLite)
+"""
+
+from app.gateway.auth.config import AuthConfig, get_auth_config, set_auth_config
+from app.gateway.auth.errors import AuthErrorCode, AuthErrorResponse, TokenError
+from app.gateway.auth.jwt import TokenPayload, create_access_token, decode_token
+from app.gateway.auth.local_provider import LocalAuthProvider
+from app.gateway.auth.models import User, UserResponse
+from app.gateway.auth.password import hash_password, verify_password
+from app.gateway.auth.providers import AuthProvider
+from app.gateway.auth.repositories.base import UserRepository
+
+__all__ = [
+    # Config
+    "AuthConfig",
+    "get_auth_config",
+    "set_auth_config",
+    # Errors
+    "AuthErrorCode",
+    "AuthErrorResponse",
+    "TokenError",
+    # JWT
+    "TokenPayload",
+    "create_access_token",
+    "decode_token",
+    # Password
+    "hash_password",
+    "verify_password",
+    # Models
+    "User",
+    "UserResponse",
+    # Providers
+    "AuthProvider",
+    "LocalAuthProvider",
+    # Repository
+    "UserRepository",
+]

backend/app/gateway/auth/config.py

@@ -0,0 +1,57 @@
+"""Authentication configuration for DeerFlow."""
+
+import logging
+import os
+import secrets
+
+from dotenv import load_dotenv
+from pydantic import BaseModel, Field
+
+load_dotenv()
+
+logger = logging.getLogger(__name__)
+
+
+class AuthConfig(BaseModel):
+    """JWT and auth-related configuration. Parsed once at startup.
+
+    Note: the ``users`` table now lives in the shared persistence
+    database managed by ``deerflow.persistence.engine``. The old
+    ``users_db_path`` config key has been removed — user storage is
+    configured through ``config.database`` like every other table.
+    """
+
+    jwt_secret: str = Field(
+        ...,
+        description="Secret key for JWT signing. MUST be set via AUTH_JWT_SECRET.",
+    )
+    token_expiry_days: int = Field(default=7, ge=1, le=30)
+    oauth_github_client_id: str | None = Field(default=None)
+    oauth_github_client_secret: str | None = Field(default=None)
+
+
+_auth_config: AuthConfig | None = None
+
+
+def get_auth_config() -> AuthConfig:
+    """Get the global AuthConfig instance. Parses from env on first call."""
+    global _auth_config
+    if _auth_config is None:
+        jwt_secret = os.environ.get("AUTH_JWT_SECRET")
+        if not jwt_secret:
+            jwt_secret = secrets.token_urlsafe(32)
+            os.environ["AUTH_JWT_SECRET"] = jwt_secret
+            logger.warning(
+                "⚠ AUTH_JWT_SECRET is not set — using an auto-generated ephemeral secret. "
+                "Sessions will be invalidated on restart. "
+                "For production, add AUTH_JWT_SECRET to your .env file: "
+                'python -c "import secrets; print(secrets.token_urlsafe(32))"'
+            )
+        _auth_config = AuthConfig(jwt_secret=jwt_secret)
+    return _auth_config
+
+
+def set_auth_config(config: AuthConfig) -> None:
+    """Set the global AuthConfig instance (for testing)."""
+    global _auth_config
+    _auth_config = config

backend/app/gateway/auth/credential_file.py

@@ -0,0 +1,38 @@
+"""Write initial admin credentials to a restricted file instead of logs.
+
+Logging secrets to stdout/stderr is a well-known CodeQL finding
+(py/clear-text-logging-sensitive-data) — in production those logs
+get collected into ELK/Splunk/etc and become a secret sprawl
+source. This helper writes the credential to a 0600 file that only
+the process user can read, and returns the path so the caller can
+log **the path** (not the password) for the operator to pick up.
+"""
+
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+_CREDENTIAL_FILE = Path(".deer-flow") / "admin_initial_credentials.txt"
+
+
+def write_initial_credentials(email: str, password: str, *, label: str = "initial") -> Path:
+    """Write the admin email + password to ``.deer-flow/admin_initial_credentials.txt``.
+
+    Creates the parent directory if it does not exist. Sets the file
+    mode to 0600 so only the owning process user can read it.
+
+    ``label`` distinguishes "initial" (fresh creation) from "reset"
+    (password reset) in the file header, so an operator picking up
+    the file after a restart can tell which event produced it.
+
+    Returns the absolute :class:`Path` to the file.
+    """
+    _CREDENTIAL_FILE.parent.mkdir(parents=True, exist_ok=True)
+
+    content = (
+        f"# DeerFlow admin {label} credentials\n# This file is generated on first boot or password reset.\n# Change the password after login via Settings -> Account,\n# then delete this file.\n#\nemail: {email}\npassword: {password}\n"
+    )
+    _CREDENTIAL_FILE.write_text(content)
+    os.chmod(_CREDENTIAL_FILE, 0o600)
+    return _CREDENTIAL_FILE.resolve()

backend/app/gateway/auth/errors.py

@@ -0,0 +1,44 @@
+"""Typed error definitions for auth module.
+
+AuthErrorCode: exhaustive enum of all auth failure conditions.
+TokenError: exhaustive enum of JWT decode failures.
+AuthErrorResponse: structured error payload for HTTP responses.
+"""
+
+from enum import StrEnum
+
+from pydantic import BaseModel
+
+
+class AuthErrorCode(StrEnum):
+    """Exhaustive list of auth error conditions."""
+
+    INVALID_CREDENTIALS = "invalid_credentials"
+    TOKEN_EXPIRED = "token_expired"
+    TOKEN_INVALID = "token_invalid"
+    USER_NOT_FOUND = "user_not_found"
+    EMAIL_ALREADY_EXISTS = "email_already_exists"
+    PROVIDER_NOT_FOUND = "provider_not_found"
+    NOT_AUTHENTICATED = "not_authenticated"
+
+
+class TokenError(StrEnum):
+    """Exhaustive list of JWT decode failure reasons."""
+
+    EXPIRED = "expired"
+    INVALID_SIGNATURE = "invalid_signature"
+    MALFORMED = "malformed"
+
+
+class AuthErrorResponse(BaseModel):
+    """Structured error response — replaces bare `detail` strings."""
+
+    code: AuthErrorCode
+    message: str
+
+
+def token_error_to_code(err: TokenError) -> AuthErrorCode:
+    """Map TokenError to AuthErrorCode — single source of truth."""
+    if err == TokenError.EXPIRED:
+        return AuthErrorCode.TOKEN_EXPIRED
+    return AuthErrorCode.TOKEN_INVALID

backend/app/gateway/auth/jwt.py

@@ -0,0 +1,55 @@
+"""JWT token creation and verification."""
+
+from datetime import UTC, datetime, timedelta
+
+import jwt
+from pydantic import BaseModel
+
+from app.gateway.auth.config import get_auth_config
+from app.gateway.auth.errors import TokenError
+
+
+class TokenPayload(BaseModel):
+    """JWT token payload."""
+
+    sub: str  # user_id
+    exp: datetime
+    iat: datetime | None = None
+    ver: int = 0  # token_version — must match User.token_version
+
+
+def create_access_token(user_id: str, expires_delta: timedelta | None = None, token_version: int = 0) -> str:
+    """Create a JWT access token.
+
+    Args:
+        user_id: The user's UUID as string
+        expires_delta: Optional custom expiry, defaults to 7 days
+        token_version: User's current token_version for invalidation
+
+    Returns:
+        Encoded JWT string
+    """
+    config = get_auth_config()
+    expiry = expires_delta or timedelta(days=config.token_expiry_days)
+
+    now = datetime.now(UTC)
+    payload = {"sub": user_id, "exp": now + expiry, "iat": now, "ver": token_version}
+    return jwt.encode(payload, config.jwt_secret, algorithm="HS256")
+
+
+def decode_token(token: str) -> TokenPayload | TokenError:
+    """Decode and validate a JWT token.
+
+    Returns:
+        TokenPayload if valid, or a specific TokenError variant.
+    """
+    config = get_auth_config()
+    try:
+        payload = jwt.decode(token, config.jwt_secret, algorithms=["HS256"])
+        return TokenPayload(**payload)
+    except jwt.ExpiredSignatureError:
+        return TokenError.EXPIRED
+    except jwt.InvalidSignatureError:
+        return TokenError.INVALID_SIGNATURE
+    except jwt.PyJWTError:
+        return TokenError.MALFORMED

backend/app/gateway/auth/local_provider.py

@@ -0,0 +1,87 @@
+"""Local email/password authentication provider."""
+
+from app.gateway.auth.models import User
+from app.gateway.auth.password import hash_password_async, verify_password_async
+from app.gateway.auth.providers import AuthProvider
+from app.gateway.auth.repositories.base import UserRepository
+
+
+class LocalAuthProvider(AuthProvider):
+    """Email/password authentication provider using local database."""
+
+    def __init__(self, repository: UserRepository):
+        """Initialize with a UserRepository.
+
+        Args:
+            repository: UserRepository implementation (SQLite)
+        """
+        self._repo = repository
+
+    async def authenticate(self, credentials: dict) -> User | None:
+        """Authenticate with email and password.
+
+        Args:
+            credentials: dict with 'email' and 'password' keys
+
+        Returns:
+            User if authentication succeeds, None otherwise
+        """
+        email = credentials.get("email")
+        password = credentials.get("password")
+
+        if not email or not password:
+            return None
+
+        user = await self._repo.get_user_by_email(email)
+        if user is None:
+            return None
+
+        if user.password_hash is None:
+            # OAuth user without local password
+            return None
+
+        if not await verify_password_async(password, user.password_hash):
+            return None
+
+        return user
+
+    async def get_user(self, user_id: str) -> User | None:
+        """Get user by ID."""
+        return await self._repo.get_user_by_id(user_id)
+
+    async def create_user(self, email: str, password: str | None = None, system_role: str = "user", needs_setup: bool = False) -> User:
+        """Create a new local user.
+
+        Args:
+            email: User email address
+            password: Plain text password (will be hashed)
+            system_role: Role to assign ("admin" or "user")
+            needs_setup: If True, user must complete setup on first login
+
+        Returns:
+            Created User instance
+        """
+        password_hash = await hash_password_async(password) if password else None
+        user = User(
+            email=email,
+            password_hash=password_hash,
+            system_role=system_role,
+            needs_setup=needs_setup,
+        )
+        return await self._repo.create_user(user)
+
+    async def get_user_by_oauth(self, provider: str, oauth_id: str) -> User | None:
+        """Get user by OAuth provider and ID."""
+        return await self._repo.get_user_by_oauth(provider, oauth_id)
+
+    async def count_users(self) -> int:
+        """Return total number of registered users."""
+        return await self._repo.count_users()
+
+    async def update_user(self, user: User) -> User:
+        """Update an existing user."""
+        return await self._repo.update_user(user)
+
+    async def get_user_by_email(self, email: str) -> User | None:
+        """Get user by email."""
+        return await self._repo.get_user_by_email(email)

backend/app/gateway/auth/models.py

@@ -0,0 +1,41 @@
+"""User Pydantic models for authentication."""
+
+from datetime import UTC, datetime
+from typing import Literal
+from uuid import UUID, uuid4
+
+from pydantic import BaseModel, ConfigDict, EmailStr, Field
+
+
+def _utc_now() -> datetime:
+    """Return current UTC time (timezone-aware)."""
+    return datetime.now(UTC)
+
+
+class User(BaseModel):
+    """Internal user representation."""
+
+    model_config = ConfigDict(from_attributes=True)
+
+    id: UUID = Field(default_factory=uuid4, description="Primary key")
+    email: EmailStr = Field(..., description="Unique email address")
+    password_hash: str | None = Field(None, description="bcrypt hash, nullable for OAuth users")
+    system_role: Literal["admin", "user"] = Field(default="user")
+    created_at: datetime = Field(default_factory=_utc_now)
+
+    # OAuth linkage (optional)
+    oauth_provider: str | None = Field(None, description="e.g. 'github', 'google'")
+    oauth_id: str | None = Field(None, description="User ID from OAuth provider")
+
+    # Auth lifecycle
+    needs_setup: bool = Field(default=False, description="True for auto-created admin until setup completes")
+    token_version: int = Field(default=0, description="Incremented on password change to invalidate old JWTs")
+
+
+class UserResponse(BaseModel):
+    """Response model for user info endpoint."""
+
+    id: str
+    email: str
+    system_role: Literal["admin", "user"]
+    needs_setup: bool = False

backend/app/gateway/auth/password.py

@@ -0,0 +1,33 @@
+"""Password hashing utilities using bcrypt directly."""
+
+import asyncio
+
+import bcrypt
+
+
+def hash_password(password: str) -> str:
+    """Hash a password using bcrypt."""
+    return bcrypt.hashpw(password.encode("utf-8"), bcrypt.gensalt()).decode("utf-8")
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """Verify a password against its hash."""
+    return bcrypt.checkpw(plain_password.encode("utf-8"), hashed_password.encode("utf-8"))
+
+
+async def hash_password_async(password: str) -> str:
+    """Hash a password using bcrypt (non-blocking).
+
+    Wraps the blocking bcrypt operation in a thread pool to avoid
+    blocking the event loop during password hashing.
+    """
+    return await asyncio.to_thread(hash_password, password)
+
+
+async def verify_password_async(plain_password: str, hashed_password: str) -> bool:
+    """Verify a password against its hash (non-blocking).
+
+    Wraps the blocking bcrypt operation in a thread pool to avoid
+    blocking the event loop during password verification.
+    """
+    return await asyncio.to_thread(verify_password, plain_password, hashed_password)

backend/app/gateway/auth/providers.py

@@ -0,0 +1,24 @@
+"""Auth provider abstraction."""
+
+from abc import ABC, abstractmethod
+
+
+class AuthProvider(ABC):
+    """Abstract base class for authentication providers."""
+
+    @abstractmethod
+    async def authenticate(self, credentials: dict) -> "User | None":
+        """Authenticate user with given credentials.
+
+        Returns User if authentication succeeds, None otherwise.
+        """
+        ...
+
+    @abstractmethod
+    async def get_user(self, user_id: str) -> "User | None":
+        """Retrieve user by ID."""
+        ...
+
+
+# Import User at runtime to avoid circular imports
+from app.gateway.auth.models import User  # noqa: E402

backend/app/gateway/auth/repositories/base.py

@@ -0,0 +1,82 @@
+"""User repository interface for abstracting database operations."""
+
+from abc import ABC, abstractmethod
+
+from app.gateway.auth.models import User
+
+
+class UserRepository(ABC):
+    """Abstract interface for user data storage.
+
+    Implement this interface to support different storage backends
+    (SQLite)
+    """
+
+    @abstractmethod
+    async def create_user(self, user: User) -> User:
+        """Create a new user.
+
+        Args:
+            user: User object to create
+
+        Returns:
+            Created User with ID assigned
+
+        Raises:
+            ValueError: If email already exists
+        """
+        ...
+
+    @abstractmethod
+    async def get_user_by_id(self, user_id: str) -> User | None:
+        """Get user by ID.
+
+        Args:
+            user_id: User UUID as string
+
+        Returns:
+            User if found, None otherwise
+        """
+        ...
+
+    @abstractmethod
+    async def get_user_by_email(self, email: str) -> User | None:
+        """Get user by email.
+
+        Args:
+            email: User email address
+
+        Returns:
+            User if found, None otherwise
+        """
+        ...
+
+    @abstractmethod
+    async def update_user(self, user: User) -> User:
+        """Update an existing user.
+
+        Args:
+            user: User object with updated fields
+
+        Returns:
+            Updated User
+        """
+        ...
+
+    @abstractmethod
+    async def count_users(self) -> int:
+        """Return total number of registered users."""
+        ...
+
+    @abstractmethod
+    async def get_user_by_oauth(self, provider: str, oauth_id: str) -> User | None:
+        """Get user by OAuth provider and ID.
+
+        Args:
+            provider: OAuth provider name (e.g. 'github', 'google')
+            oauth_id: User ID from the OAuth provider
+
+        Returns:
+            User if found, None otherwise
+        """
+        ...

backend/app/gateway/auth/repositories/sqlite.py

@@ -0,0 +1,116 @@
+"""SQLAlchemy-backed UserRepository implementation.
+
+Uses the shared async session factory from
+``deerflow.persistence.engine`` — the ``users`` table lives in the
+same database as ``threads_meta``, ``runs``, ``run_events``, and
+``feedback``.
+
+Constructor takes the session factory directly (same pattern as the
+other four repositories in ``deerflow.persistence.*``). Callers
+construct this after ``init_engine_from_config()`` has run.
+"""
+
+from __future__ import annotations
+
+from datetime import UTC
+from uuid import UUID
+
+from sqlalchemy import func, select
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker
+
+from app.gateway.auth.models import User
+from app.gateway.auth.repositories.base import UserRepository
+from deerflow.persistence.user.model import UserRow
+
+
+class SQLiteUserRepository(UserRepository):
+    """Async user repository backed by the shared SQLAlchemy engine."""
+
+    def __init__(self, session_factory: async_sessionmaker[AsyncSession]) -> None:
+        self._sf = session_factory
+
+    # ── Converters ────────────────────────────────────────────────────
+
+    @staticmethod
+    def _row_to_user(row: UserRow) -> User:
+        return User(
+            id=UUID(row.id),
+            email=row.email,
+            password_hash=row.password_hash,
+            system_role=row.system_role,  # type: ignore[arg-type]
+            # SQLite loses tzinfo on read; reattach UTC so downstream
+            # code can compare timestamps reliably.
+            created_at=row.created_at if row.created_at.tzinfo else row.created_at.replace(tzinfo=UTC),
+            oauth_provider=row.oauth_provider,
+            oauth_id=row.oauth_id,
+            needs_setup=row.needs_setup,
+            token_version=row.token_version,
+        )
+
+    @staticmethod
+    def _user_to_row(user: User) -> UserRow:
+        return UserRow(
+            id=str(user.id),
+            email=user.email,
+            password_hash=user.password_hash,
+            system_role=user.system_role,
+            created_at=user.created_at,
+            oauth_provider=user.oauth_provider,
+            oauth_id=user.oauth_id,
+            needs_setup=user.needs_setup,
+            token_version=user.token_version,
+        )
+
+    # ── CRUD ──────────────────────────────────────────────────────────
+
+    async def create_user(self, user: User) -> User:
+        """Insert a new user. Raises ``ValueError`` on duplicate email."""
+        row = self._user_to_row(user)
+        async with self._sf() as session:
+            session.add(row)
+            try:
+                await session.commit()
+            except IntegrityError as exc:
+                await session.rollback()
+                raise ValueError(f"Email already registered: {user.email}") from exc
+        return user
+
+    async def get_user_by_id(self, user_id: str) -> User | None:
+        async with self._sf() as session:
+            row = await session.get(UserRow, user_id)
+            return self._row_to_user(row) if row is not None else None
+
+    async def get_user_by_email(self, email: str) -> User | None:
+        stmt = select(UserRow).where(UserRow.email == email)
+        async with self._sf() as session:
+            result = await session.execute(stmt)
+            row = result.scalar_one_or_none()
+            return self._row_to_user(row) if row is not None else None
+
+    async def update_user(self, user: User) -> User:
+        async with self._sf() as session:
+            row = await session.get(UserRow, str(user.id))
+            if row is None:
+                return user
+            row.email = user.email
+            row.password_hash = user.password_hash
+            row.system_role = user.system_role
+            row.oauth_provider = user.oauth_provider
+            row.oauth_id = user.oauth_id
+            row.needs_setup = user.needs_setup
+            row.token_version = user.token_version
+            await session.commit()
+        return user
+
+    async def count_users(self) -> int:
+        stmt = select(func.count()).select_from(UserRow)
+        async with self._sf() as session:
+            return await session.scalar(stmt) or 0
+
+    async def get_user_by_oauth(self, provider: str, oauth_id: str) -> User | None:
+        stmt = select(UserRow).where(UserRow.oauth_provider == provider, UserRow.oauth_id == oauth_id)
+        async with self._sf() as session:
+            result = await session.execute(stmt)
+            row = result.scalar_one_or_none()
+            return self._row_to_user(row) if row is not None else None

backend/app/gateway/auth/reset_admin.py

@@ -0,0 +1,91 @@
+"""CLI tool to reset an admin password.
+
+Usage:
+    python -m app.gateway.auth.reset_admin
+    python -m app.gateway.auth.reset_admin --email admin@example.com
+
+Writes the new password to ``.deer-flow/admin_initial_credentials.txt``
+(mode 0600) instead of printing it, so CI / log aggregators never see
+the cleartext secret.
+"""
+
+from __future__ import annotations
+
+import argparse
+import asyncio
+import secrets
+import sys
+
+from sqlalchemy import select
+
+from app.gateway.auth.credential_file import write_initial_credentials
+from app.gateway.auth.password import hash_password
+from app.gateway.auth.repositories.sqlite import SQLiteUserRepository
+from deerflow.persistence.user.model import UserRow
+
+
+async def _run(email: str | None) -> int:
+    from deerflow.config import get_app_config
+    from deerflow.persistence.engine import (
+        close_engine,
+        get_session_factory,
+        init_engine_from_config,
+    )
+
+    config = get_app_config()
+    await init_engine_from_config(config.database)
+    try:
+        sf = get_session_factory()
+        if sf is None:
+            print("Error: persistence engine not available (check config.database).", file=sys.stderr)
+            return 1
+
+        repo = SQLiteUserRepository(sf)
+
+        if email:
+            user = await repo.get_user_by_email(email)
+        else:
+            # Find first admin via direct SELECT — repository does not
+            # expose a "first admin" helper and we do not want to add
+            # one just for this CLI.
+            async with sf() as session:
+                stmt = select(UserRow).where(UserRow.system_role == "admin").limit(1)
+                row = (await session.execute(stmt)).scalar_one_or_none()
+            if row is None:
+                user = None
+            else:
+                user = await repo.get_user_by_id(row.id)
+
+        if user is None:
+            if email:
+                print(f"Error: user '{email}' not found.", file=sys.stderr)
+            else:
+                print("Error: no admin user found.", file=sys.stderr)
+            return 1
+
+        new_password = secrets.token_urlsafe(16)
+        user.password_hash = hash_password(new_password)
+        user.token_version += 1
+        user.needs_setup = True
+        await repo.update_user(user)
+
+        cred_path = write_initial_credentials(user.email, new_password, label="reset")
+        print(f"Password reset for: {user.email}")
+        print(f"Credentials written to: {cred_path} (mode 0600)")
+        print("Next login will require setup (new email + password).")
+        return 0
+    finally:
+        await close_engine()
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="Reset admin password")
+    parser.add_argument("--email", help="Admin email (default: first admin found)")
+    args = parser.parse_args()
+
+    exit_code = asyncio.run(_run(args.email))
+    sys.exit(exit_code)
+
+
+if __name__ == "__main__":
+    main()

backend/app/gateway/auth_middleware.py

@@ -0,0 +1,117 @@
+"""Global authentication middleware — fail-closed safety net.
+
+Rejects unauthenticated requests to non-public paths with 401. When a
+request passes the cookie check, resolves the JWT payload to a real
+``User`` object and stamps it into both ``request.state.user`` and the
+``deerflow.runtime.user_context`` contextvar so that repository-layer
+owner filtering works automatically via the sentinel pattern.
+
+Fine-grained permission checks remain in authz.py decorators.
+"""
+
+from collections.abc import Callable
+
+from fastapi import Request, Response
+from starlette.middleware.base import BaseHTTPMiddleware
+from starlette.responses import JSONResponse
+from starlette.types import ASGIApp
+
+from app.gateway.auth.errors import AuthErrorCode
+from deerflow.runtime.user_context import reset_current_user, set_current_user
+
+# Paths that never require authentication.
+_PUBLIC_PATH_PREFIXES: tuple[str, ...] = (
+    "/health",
+    "/docs",
+    "/redoc",
+    "/openapi.json",
+)
+
+# Exact auth paths that are public (login/register/status check).
+# /api/v1/auth/me, /api/v1/auth/change-password etc. are NOT public.
+_PUBLIC_EXACT_PATHS: frozenset[str] = frozenset(
+    {
+        "/api/v1/auth/login/local",
+        "/api/v1/auth/register",
+        "/api/v1/auth/logout",
+        "/api/v1/auth/setup-status",
+    }
+)
+
+
+def _is_public(path: str) -> bool:
+    stripped = path.rstrip("/")
+    if stripped in _PUBLIC_EXACT_PATHS:
+        return True
+    return any(path.startswith(prefix) for prefix in _PUBLIC_PATH_PREFIXES)
+
+
+class AuthMiddleware(BaseHTTPMiddleware):
+    """Strict auth gate: reject requests without a valid session.
+
+    Two-stage check for non-public paths:
+
+    1. Cookie presence — return 401 NOT_AUTHENTICATED if missing
+    2. JWT validation via ``get_optional_user_from_request`` — return 401
+       TOKEN_INVALID if the token is absent, malformed, expired, or the
+       signed user does not exist / is stale
+
+    On success, stamps ``request.state.user`` and the
+    ``deerflow.runtime.user_context`` contextvar so that repository-layer
+    owner filters work downstream without every route needing a
+    ``@require_auth`` decorator. Routes that need per-resource
+    authorization (e.g. "user A cannot read user B's thread by guessing
+    the URL") should additionally use ``@require_permission(...,
+    owner_check=True)`` for explicit enforcement — but authentication
+    itself is fully handled here.
+    """
+
+    def __init__(self, app: ASGIApp) -> None:
+        super().__init__(app)
+
+    async def dispatch(self, request: Request, call_next: Callable) -> Response:
+        if _is_public(request.url.path):
+            return await call_next(request)
+
+        # Non-public path: require session cookie
+        if not request.cookies.get("access_token"):
+            return JSONResponse(
+                status_code=401,
+                content={
+                    "detail": {
+                        "code": AuthErrorCode.NOT_AUTHENTICATED,
+                        "message": "Authentication required",
+                    }
+                },
+            )
+
+        # Strict JWT validation: reject junk/expired tokens with 401
+        # right here instead of silently passing through. This closes
+        # the "junk cookie bypass" gap (AUTH_TEST_PLAN test 7.5.8):
+        # without this, non-isolation routes like /api/models would
+        # accept any cookie-shaped string as authentication.
+        #
+        # We call the *strict* resolver so that fine-grained error
+        # codes (token_expired, token_invalid, user_not_found, …)
+        # propagate from AuthErrorCode, not get flattened into one
+        # generic code. BaseHTTPMiddleware doesn't let HTTPException
+        # bubble up, so we catch and render it as JSONResponse here.
+        #
+        # On success we stamp request.state.user and the contextvar
+        # so repository-layer owner filters work downstream without
+        # every route needing a decorator.
+        from fastapi import HTTPException
+
+        from app.gateway.deps import get_current_user_from_request
+
+        try:
+            user = await get_current_user_from_request(request)
+        except HTTPException as exc:
+            return JSONResponse(status_code=exc.status_code, content={"detail": exc.detail})
+
+        request.state.user = user
+        token = set_current_user(user)
+        try:
+            return await call_next(request)
+        finally:
+            reset_current_user(token)

backend/app/gateway/authz.py

@@ -0,0 +1,269 @@
+"""Authorization decorators and context for DeerFlow.
+
+Inspired by LangGraph Auth system: https://github.com/langchain-ai/langgraph/blob/main/libs/sdk-py/langgraph_sdk/auth/__init__.py
+
+**Usage:**
+
+1. Use ``@require_auth`` on routes that need authentication
+2. Use ``@require_permission("resource", "action", filter_key=...)`` for permission checks
+3. The decorator chain processes from bottom to top
+
+**Example:**
+
+    @router.get("/{thread_id}")
+    @require_auth
+    @require_permission("threads", "read", owner_check=True)
+    async def get_thread(thread_id: str, request: Request):
+        # User is authenticated and has threads:read permission
+        ...
+
+**Permission Model:**
+
+- threads:read   - View thread
+- threads:write  - Create/update thread
+- threads:delete - Delete thread
+- runs:create   - Run agent
+- runs:read     - View run
+- runs:cancel   - Cancel run
+"""
+
+from __future__ import annotations
+
+import functools
+from collections.abc import Callable
+from typing import TYPE_CHECKING, Any, ParamSpec, TypeVar
+
+from fastapi import HTTPException, Request
+
+if TYPE_CHECKING:
+    from app.gateway.auth.models import User
+
+P = ParamSpec("P")
+T = TypeVar("T")
+
+
+# Permission constants
+class Permissions:
+    """Permission constants for resource:action format."""
+
+    # Threads
+    THREADS_READ = "threads:read"
+    THREADS_WRITE = "threads:write"
+    THREADS_DELETE = "threads:delete"
+
+    # Runs
+    RUNS_CREATE = "runs:create"
+    RUNS_READ = "runs:read"
+    RUNS_CANCEL = "runs:cancel"
+
+
+class AuthContext:
+    """Authentication context for the current request.
+
+    Stored in request.state.auth after require_auth decoration.
+
+    Attributes:
+        user: The authenticated user, or None if anonymous
+        permissions: List of permission strings (e.g., "threads:read")
+    """
+
+    __slots__ = ("user", "permissions")
+
+    def __init__(self, user: User | None = None, permissions: list[str] | None = None):
+        self.user = user
+        self.permissions = permissions or []
+
+    @property
+    def is_authenticated(self) -> bool:
+        """Check if user is authenticated."""
+        return self.user is not None
+
+    def has_permission(self, resource: str, action: str) -> bool:
+        """Check if context has permission for resource:action.
+
+        Args:
+            resource: Resource name (e.g., "threads")
+            action: Action name (e.g., "read")
+
+        Returns:
+            True if user has permission
+        """
+        permission = f"{resource}:{action}"
+        return permission in self.permissions
+
+    def require_user(self) -> User:
+        """Get user or raise 401.
+
+        Raises:
+            HTTPException 401 if not authenticated
+        """
+        if not self.user:
+            raise HTTPException(status_code=401, detail="Authentication required")
+        return self.user
+
+
+def get_auth_context(request: Request) -> AuthContext | None:
+    """Get AuthContext from request state."""
+    return getattr(request.state, "auth", None)
+
+
+_ALL_PERMISSIONS: list[str] = [
+    Permissions.THREADS_READ,
+    Permissions.THREADS_WRITE,
+    Permissions.THREADS_DELETE,
+    Permissions.RUNS_CREATE,
+    Permissions.RUNS_READ,
+    Permissions.RUNS_CANCEL,
+]
+
+
+async def _authenticate(request: Request) -> AuthContext:
+    """Authenticate request and return AuthContext.
+
+    Delegates to deps.get_optional_user_from_request() for the JWT→User pipeline.
+    Returns AuthContext with user=None for anonymous requests.
+    """
+    from app.gateway.deps import get_optional_user_from_request
+
+    user = await get_optional_user_from_request(request)
+    if user is None:
+        return AuthContext(user=None, permissions=[])
+
+    # In future, permissions could be stored in user record
+    return AuthContext(user=user, permissions=_ALL_PERMISSIONS)
+
+
+def require_auth[**P, T](func: Callable[P, T]) -> Callable[P, T]:
+    """Decorator that authenticates the request and sets AuthContext.
+
+    Must be placed ABOVE other decorators (executes after them).
+
+    Usage:
+        @router.get("/{thread_id}")
+        @require_auth  # Bottom decorator (executes first after permission check)
+        @require_permission("threads", "read")
+        async def get_thread(thread_id: str, request: Request):
+            auth: AuthContext = request.state.auth
+            ...
+
+    Raises:
+        ValueError: If 'request' parameter is missing
+    """
+
+    @functools.wraps(func)
+    async def wrapper(*args: Any, **kwargs: Any) -> Any:
+        request = kwargs.get("request")
+        if request is None:
+            raise ValueError("require_auth decorator requires 'request' parameter")
+
+        # Authenticate and set context
+        auth_context = await _authenticate(request)
+        request.state.auth = auth_context
+
+        return await func(*args, **kwargs)
+
+    return wrapper
+
+
+def require_permission(
+    resource: str,
+    action: str,
+    owner_check: bool = False,
+    owner_filter_key: str = "owner_id",
+    inject_record: bool = False,
+) -> Callable[[Callable[P, T]], Callable[P, T]]:
+    """Decorator that checks permission for resource:action.
+
+    Must be used AFTER @require_auth.
+
+    Args:
+        resource: Resource name (e.g., "threads", "runs")
+        action: Action name (e.g., "read", "write", "delete")
+        owner_check: If True, validates that the current user owns the resource.
+                     Requires 'thread_id' path parameter and performs ownership check.
+        owner_filter_key: Field name for ownership filter (default: "owner_id")
+        inject_record: If True and owner_check is True, injects the thread record
+                      into kwargs['thread_record'] for use in the handler.
+
+    Usage:
+        # Simple permission check
+        @require_permission("threads", "read")
+        async def get_thread(thread_id: str, request: Request):
+            ...
+
+        # With ownership check (for /threads/{thread_id} endpoints)
+        @require_permission("threads", "delete", owner_check=True)
+        async def delete_thread(thread_id: str, request: Request):
+            ...
+
+        # With ownership check and record injection
+        @require_permission("threads", "delete", owner_check=True, inject_record=True)
+        async def delete_thread(thread_id: str, request: Request, thread_record: dict = None):
+            # thread_record is injected if found
+            ...
+
+    Raises:
+        HTTPException 401: If authentication required but user is anonymous
+        HTTPException 403: If user lacks permission
+        HTTPException 404: If owner_check=True but user doesn't own the thread
+        ValueError: If owner_check=True but 'thread_id' parameter is missing
+    """
+
+    def decorator(func: Callable[P, T]) -> Callable[P, T]:
+        @functools.wraps(func)
+        async def wrapper(*args: Any, **kwargs: Any) -> Any:
+            request = kwargs.get("request")
+            if request is None:
+                raise ValueError("require_permission decorator requires 'request' parameter")
+
+            auth: AuthContext = getattr(request.state, "auth", None)
+            if auth is None:
+                auth = await _authenticate(request)
+                request.state.auth = auth
+
+            if not auth.is_authenticated:
+                raise HTTPException(status_code=401, detail="Authentication required")
+
+            # Check permission
+            if not auth.has_permission(resource, action):
+                raise HTTPException(
+                    status_code=403,
+                    detail=f"Permission denied: {resource}:{action}",
+                )
+
+            # Owner check for thread-specific resources.
+            #
+            # 2.0-rc moved thread metadata into the SQL persistence layer
+            # (``threads_meta`` table). We verify ownership via
+            # ``ThreadMetaStore.check_access`` instead of the LangGraph
+            # store path that the original PR #1728 used. ``check_access``
+            # returns True for missing rows (untracked legacy thread) and
+            # for rows whose ``owner_id`` is NULL (shared / pre-auth data),
+            # so this is a strict-deny check rather than strict-allow:
+            # only an *existing* row with a *different* owner_id triggers
+            # 404.
+            #
+            # ``inject_record`` is no longer supported — it was a
+            # convenience for handlers that wanted the LangGraph store
+            # blob; the SQL repo would need a different shape and no
+            # caller in 2.0 needs it.
+            if owner_check:
+                thread_id = kwargs.get("thread_id")
+                if thread_id is None:
+                    raise ValueError("require_permission with owner_check=True requires 'thread_id' parameter")
+
+                from app.gateway.deps import get_thread_meta_repo
+
+                thread_meta_repo = get_thread_meta_repo(request)
+                allowed = await thread_meta_repo.check_access(thread_id, str(auth.user.id))
+                if not allowed:
+                    raise HTTPException(
+                        status_code=404,
+                        detail=f"Thread {thread_id} not found",
+                    )
+
+            return await func(*args, **kwargs)
+
+        return wrapper
+
+    return decorator

backend/app/gateway/config.py

@@ -0,0 +1,27 @@
+import os
+
+from pydantic import BaseModel, Field
+
+
+class GatewayConfig(BaseModel):
+    """Configuration for the API Gateway."""
+
+    host: str = Field(default="0.0.0.0", description="Host to bind the gateway server")
+    port: int = Field(default=8001, description="Port to bind the gateway server")
+    cors_origins: list[str] = Field(default_factory=lambda: ["http://localhost:3000"], description="Allowed CORS origins")
+
+
+_gateway_config: GatewayConfig | None = None
+
+
+def get_gateway_config() -> GatewayConfig:
+    """Get gateway config, loading from environment if available."""
+    global _gateway_config
+    if _gateway_config is None:
+        cors_origins_str = os.getenv("CORS_ORIGINS", "http://localhost:3000")
+        _gateway_config = GatewayConfig(
+            host=os.getenv("GATEWAY_HOST", "0.0.0.0"),
+            port=int(os.getenv("GATEWAY_PORT", "8001")),
+            cors_origins=cors_origins_str.split(","),
+        )
+    return _gateway_config

backend/app/gateway/csrf_middleware.py

@@ -0,0 +1,112 @@
+"""CSRF protection middleware for FastAPI.
+
+Per RFC-001:
+State-changing operations require CSRF protection.
+"""
+
+import secrets
+from collections.abc import Callable
+
+from fastapi import Request, Response
+from starlette.middleware.base import BaseHTTPMiddleware
+from starlette.responses import JSONResponse
+from starlette.types import ASGIApp
+
+CSRF_COOKIE_NAME = "csrf_token"
+CSRF_HEADER_NAME = "X-CSRF-Token"
+CSRF_TOKEN_LENGTH = 64  # bytes
+
+
+def is_secure_request(request: Request) -> bool:
+    """Detect whether the original client request was made over HTTPS."""
+    return request.headers.get("x-forwarded-proto", request.url.scheme) == "https"
+
+
+def generate_csrf_token() -> str:
+    """Generate a secure random CSRF token."""
+    return secrets.token_urlsafe(CSRF_TOKEN_LENGTH)
+
+
+def should_check_csrf(request: Request) -> bool:
+    """Determine if a request needs CSRF validation.
+
+    CSRF is checked for state-changing methods (POST, PUT, DELETE, PATCH).
+    GET, HEAD, OPTIONS, and TRACE are exempt per RFC 7231.
+    """
+    if request.method not in ("POST", "PUT", "DELETE", "PATCH"):
+        return False
+
+    path = request.url.path.rstrip("/")
+    # Exempt /api/v1/auth/me endpoint
+    if path == "/api/v1/auth/me":
+        return False
+    return True
+
+
+_AUTH_EXEMPT_PATHS: frozenset[str] = frozenset(
+    {
+        "/api/v1/auth/login/local",
+        "/api/v1/auth/logout",
+        "/api/v1/auth/register",
+    }
+)
+
+
+def is_auth_endpoint(request: Request) -> bool:
+    """Check if the request is to an auth endpoint.
+
+    Auth endpoints don't need CSRF validation on first call (no token).
+    """
+    return request.url.path.rstrip("/") in _AUTH_EXEMPT_PATHS
+
+
+class CSRFMiddleware(BaseHTTPMiddleware):
+    """Middleware that implements CSRF protection using Double Submit Cookie pattern."""
+
+    def __init__(self, app: ASGIApp) -> None:
+        super().__init__(app)
+
+    async def dispatch(self, request: Request, call_next: Callable) -> Response:
+        _is_auth = is_auth_endpoint(request)
+
+        if should_check_csrf(request) and not _is_auth:
+            cookie_token = request.cookies.get(CSRF_COOKIE_NAME)
+            header_token = request.headers.get(CSRF_HEADER_NAME)
+
+            if not cookie_token or not header_token:
+                return JSONResponse(
+                    status_code=403,
+                    content={"detail": "CSRF token missing. Include X-CSRF-Token header."},
+                )
+
+            if not secrets.compare_digest(cookie_token, header_token):
+                return JSONResponse(
+                    status_code=403,
+                    content={"detail": "CSRF token mismatch."},
+                )
+
+        response = await call_next(request)
+
+        # For auth endpoints that set up session, also set CSRF cookie
+        if _is_auth and request.method == "POST":
+            # Generate a new CSRF token for the session
+            csrf_token = generate_csrf_token()
+            is_https = is_secure_request(request)
+            response.set_cookie(
+                key=CSRF_COOKIE_NAME,
+                value=csrf_token,
+                httponly=False,  # Must be JS-readable for Double Submit Cookie pattern
+                secure=is_https,
+                samesite="strict",
+            )
+
+        return response
+
+
+def get_csrf_token(request: Request) -> str | None:
+    """Get the CSRF token from the current request's cookies.
+
+    This is useful for server-side rendering where you need to embed
+    token in forms or headers.
+    """
+    return request.cookies.get(CSRF_COOKIE_NAME)

backend/app/gateway/deps.py

@@ -0,0 +1,225 @@
+"""Centralized accessors for singleton objects stored on ``app.state``.
+
+**Getters** (used by routers): raise 503 when a required dependency is
+missing, except ``get_store`` and ``get_thread_meta_repo`` which return
+``None``.
+
+Initialization is handled directly in ``app.py`` via :class:`AsyncExitStack`.
+"""
+
+from __future__ import annotations
+
+from collections.abc import AsyncGenerator
+from contextlib import AsyncExitStack, asynccontextmanager
+from typing import TYPE_CHECKING
+
+from fastapi import FastAPI, HTTPException, Request
+
+from deerflow.runtime import RunContext, RunManager
+
+if TYPE_CHECKING:
+    from app.gateway.auth.local_provider import LocalAuthProvider
+    from app.gateway.auth.repositories.sqlite import SQLiteUserRepository
+
+
+@asynccontextmanager
+async def langgraph_runtime(app: FastAPI) -> AsyncGenerator[None, None]:
+    """Bootstrap and tear down all LangGraph runtime singletons.
+
+    Usage in ``app.py``::
+
+        async with langgraph_runtime(app):
+            yield
+    """
+    from deerflow.agents.checkpointer.async_provider import make_checkpointer
+    from deerflow.config import get_app_config
+    from deerflow.persistence.engine import close_engine, get_session_factory, init_engine_from_config
+    from deerflow.runtime import make_store, make_stream_bridge
+    from deerflow.runtime.events.store import make_run_event_store
+
+    async with AsyncExitStack() as stack:
+        app.state.stream_bridge = await stack.enter_async_context(make_stream_bridge())
+
+        # Initialize persistence engine BEFORE checkpointer so that
+        # auto-create-database logic runs first (postgres backend).
+        config = get_app_config()
+        await init_engine_from_config(config.database)
+
+        app.state.checkpointer = await stack.enter_async_context(make_checkpointer())
+        app.state.store = await stack.enter_async_context(make_store())
+
+        # Initialize repositories — one get_session_factory() call for all.
+        sf = get_session_factory()
+        if sf is not None:
+            from deerflow.persistence.feedback import FeedbackRepository
+            from deerflow.persistence.run import RunRepository
+            from deerflow.persistence.thread_meta import ThreadMetaRepository
+
+            app.state.run_store = RunRepository(sf)
+            app.state.feedback_repo = FeedbackRepository(sf)
+            app.state.thread_meta_repo = ThreadMetaRepository(sf)
+        else:
+            from deerflow.persistence.thread_meta import MemoryThreadMetaStore
+            from deerflow.runtime.runs.store.memory import MemoryRunStore
+
+            app.state.run_store = MemoryRunStore()
+            app.state.feedback_repo = None
+            app.state.thread_meta_repo = MemoryThreadMetaStore(app.state.store)
+
+        # Run event store (has its own factory with config-driven backend selection)
+        run_events_config = getattr(config, "run_events", None)
+        app.state.run_event_store = make_run_event_store(run_events_config)
+
+        # RunManager with store backing for persistence
+        app.state.run_manager = RunManager(store=app.state.run_store)
+
+        try:
+            yield
+        finally:
+            await close_engine()
+
+
+# ---------------------------------------------------------------------------
+# Getters -- called by routers per-request
+# ---------------------------------------------------------------------------
+
+
+def _require(attr: str, label: str):
+    """Create a FastAPI dependency that returns ``app.state.<attr>`` or 503."""
+
+    def dep(request: Request):
+        val = getattr(request.app.state, attr, None)
+        if val is None:
+            raise HTTPException(status_code=503, detail=f"{label} not available")
+        return val
+
+    dep.__name__ = dep.__qualname__ = f"get_{attr}"
+    return dep
+
+
+get_stream_bridge = _require("stream_bridge", "Stream bridge")
+get_run_manager = _require("run_manager", "Run manager")
+get_checkpointer = _require("checkpointer", "Checkpointer")
+get_run_event_store = _require("run_event_store", "Run event store")
+get_feedback_repo = _require("feedback_repo", "Feedback")
+get_run_store = _require("run_store", "Run store")
+
+
+def get_store(request: Request):
+    """Return the global store (may be ``None`` if not configured)."""
+    return getattr(request.app.state, "store", None)
+
+
+get_thread_meta_repo = _require("thread_meta_repo", "Thread metadata store")
+
+
+def get_run_context(request: Request) -> RunContext:
+    """Build a :class:`RunContext` from ``app.state`` singletons.
+
+    Returns a *base* context with infrastructure dependencies.  Callers that
+    need per-run fields (e.g. ``follow_up_to_run_id``) should use
+    ``dataclasses.replace(ctx, follow_up_to_run_id=...)`` before passing it
+    to :func:`run_agent`.
+    """
+    from deerflow.config import get_app_config
+
+    return RunContext(
+        checkpointer=get_checkpointer(request),
+        store=get_store(request),
+        event_store=get_run_event_store(request),
+        run_events_config=getattr(get_app_config(), "run_events", None),
+        thread_meta_repo=get_thread_meta_repo(request),
+    )
+
+
+# ---------------------------------------------------------------------------
+# Auth helpers (used by authz.py and auth middleware)
+# ---------------------------------------------------------------------------
+
+# Cached singletons to avoid repeated instantiation per request
+_cached_local_provider: LocalAuthProvider | None = None
+_cached_repo: SQLiteUserRepository | None = None
+
+
+def get_local_provider() -> LocalAuthProvider:
+    """Get or create the cached LocalAuthProvider singleton.
+
+    Must be called after ``init_engine_from_config()`` — the shared
+    session factory is required to construct the user repository.
+    """
+    global _cached_local_provider, _cached_repo
+    if _cached_repo is None:
+        from app.gateway.auth.repositories.sqlite import SQLiteUserRepository
+        from deerflow.persistence.engine import get_session_factory
+
+        sf = get_session_factory()
+        if sf is None:
+            raise RuntimeError("get_local_provider() called before init_engine_from_config(); cannot access users table")
+        _cached_repo = SQLiteUserRepository(sf)
+    if _cached_local_provider is None:
+        from app.gateway.auth.local_provider import LocalAuthProvider
+
+        _cached_local_provider = LocalAuthProvider(repository=_cached_repo)
+    return _cached_local_provider
+
+
+async def get_current_user_from_request(request: Request):
+    """Get the current authenticated user from the request cookie.
+
+    Raises HTTPException 401 if not authenticated.
+    """
+    from app.gateway.auth import decode_token
+    from app.gateway.auth.errors import AuthErrorCode, AuthErrorResponse, TokenError, token_error_to_code
+
+    access_token = request.cookies.get("access_token")
+    if not access_token:
+        raise HTTPException(
+            status_code=401,
+            detail=AuthErrorResponse(code=AuthErrorCode.NOT_AUTHENTICATED, message="Not authenticated").model_dump(),
+        )
+
+    payload = decode_token(access_token)
+    if isinstance(payload, TokenError):
+        raise HTTPException(
+            status_code=401,
+            detail=AuthErrorResponse(code=token_error_to_code(payload), message=f"Token error: {payload.value}").model_dump(),
+        )
+
+    provider = get_local_provider()
+    user = await provider.get_user(payload.sub)
+    if user is None:
+        raise HTTPException(
+            status_code=401,
+            detail=AuthErrorResponse(code=AuthErrorCode.USER_NOT_FOUND, message="User not found").model_dump(),
+        )
+
+    # Token version mismatch → password was changed, token is stale
+    if user.token_version != payload.ver:
+        raise HTTPException(
+            status_code=401,
+            detail=AuthErrorResponse(code=AuthErrorCode.TOKEN_INVALID, message="Token revoked (password changed)").model_dump(),
+        )
+
+    return user
+
+
+async def get_optional_user_from_request(request: Request):
+    """Get optional authenticated user from request.
+
+    Returns None if not authenticated.
+    """
+    try:
+        return await get_current_user_from_request(request)
+    except HTTPException:
+        return None
+
+
+async def get_current_user(request: Request) -> str | None:
+    """Extract user_id from request cookie, or None if not authenticated.
+
+    Thin adapter that returns the string id for callers that only need
+    identification (e.g., ``feedback.py``). Full-user callers should use
+    ``get_current_user_from_request`` or ``get_optional_user_from_request``.
+    """
+    user = await get_optional_user_from_request(request)
+    return str(user.id) if user else None

backend/app/gateway/langgraph_auth.py

@@ -0,0 +1,106 @@
+"""LangGraph Server auth handler — shares JWT logic with Gateway.
+
+Loaded by LangGraph Server via langgraph.json ``auth.path``.
+Reuses the same ``decode_token`` / ``get_auth_config`` as Gateway,
+so both modes validate tokens with the same secret and rules.
+
+Two layers:
+  1. @auth.authenticate — validates JWT cookie, extracts user_id,
+     and enforces CSRF on state-changing methods (POST/PUT/DELETE/PATCH)
+  2. @auth.on — returns metadata filter so each user only sees own threads
+"""
+
+import secrets
+
+from langgraph_sdk import Auth
+
+from app.gateway.auth.errors import TokenError
+from app.gateway.auth.jwt import decode_token
+from app.gateway.deps import get_local_provider
+
+auth = Auth()
+
+# Methods that require CSRF validation (state-changing per RFC 7231).
+_CSRF_METHODS = frozenset({"POST", "PUT", "DELETE", "PATCH"})
+
+
+def _check_csrf(request) -> None:
+    """Enforce Double Submit Cookie CSRF check for state-changing requests.
+
+    Mirrors Gateway's CSRFMiddleware logic so that LangGraph routes
+    proxied directly by nginx have the same CSRF protection.
+    """
+    method = getattr(request, "method", "") or ""
+    if method.upper() not in _CSRF_METHODS:
+        return
+
+    cookie_token = request.cookies.get("csrf_token")
+    header_token = request.headers.get("x-csrf-token")
+
+    if not cookie_token or not header_token:
+        raise Auth.exceptions.HTTPException(
+            status_code=403,
+            detail="CSRF token missing. Include X-CSRF-Token header.",
+        )
+
+    if not secrets.compare_digest(cookie_token, header_token):
+        raise Auth.exceptions.HTTPException(
+            status_code=403,
+            detail="CSRF token mismatch.",
+        )
+
+
+@auth.authenticate
+async def authenticate(request):
+    """Validate the session cookie, decode JWT, and check token_version.
+
+    Same validation chain as Gateway's get_current_user_from_request:
+      cookie → decode JWT → DB lookup → token_version match
+    Also enforces CSRF on state-changing methods.
+    """
+    # CSRF check before authentication so forged cross-site requests
+    # are rejected early, even if the cookie carries a valid JWT.
+    _check_csrf(request)
+
+    token = request.cookies.get("access_token")
+    if not token:
+        raise Auth.exceptions.HTTPException(
+            status_code=401,
+            detail="Not authenticated",
+        )
+
+    payload = decode_token(token)
+    if isinstance(payload, TokenError):
+        raise Auth.exceptions.HTTPException(
+            status_code=401,
+            detail=f"Token error: {payload.value}",
+        )
+
+    user = await get_local_provider().get_user(payload.sub)
+    if user is None:
+        raise Auth.exceptions.HTTPException(
+            status_code=401,
+            detail="User not found",
+        )
+    if user.token_version != payload.ver:
+        raise Auth.exceptions.HTTPException(
+            status_code=401,
+            detail="Token revoked (password changed)",
+        )
+
+    return payload.sub
+
+
+@auth.on
+async def add_owner_filter(ctx: Auth.types.AuthContext, value: dict):
+    """Inject owner_id metadata on writes; filter by owner_id on reads.
+
+    Gateway stores thread ownership as ``metadata.owner_id``.
+    This handler ensures LangGraph Server enforces the same isolation.
+    """
+    # On create/update: stamp owner_id into metadata
+    metadata = value.setdefault("metadata", {})
+    metadata["owner_id"] = ctx.user.identity
+
+    # Return filter dict — LangGraph applies it to search/read/delete
+    return {"owner_id": ctx.user.identity}

backend/app/gateway/path_utils.py

@@ -0,0 +1,28 @@
+"""Shared path resolution for thread virtual paths (e.g. mnt/user-data/outputs/...)."""
+
+from pathlib import Path
+
+from fastapi import HTTPException
+
+from deerflow.config.paths import get_paths
+
+
+def resolve_thread_virtual_path(thread_id: str, virtual_path: str) -> Path:
+    """Resolve a virtual path to the actual filesystem path under thread user-data.
+
+    Args:
+        thread_id: The thread ID.
+        virtual_path: The virtual path as seen inside the sandbox
+                      (e.g., /mnt/user-data/outputs/file.txt).
+
+    Returns:
+        The resolved filesystem path.
+
+    Raises:
+        HTTPException: If the path is invalid or outside allowed directories.
+    """
+    try:
+        return get_paths().resolve_virtual_path(thread_id, virtual_path)
+    except ValueError as e:
+        status = 403 if "traversal" in str(e) else 400
+        raise HTTPException(status_code=status, detail=str(e))

backend/app/gateway/routers/__init__.py

@@ -0,0 +1,3 @@
+from . import artifacts, assistants_compat, mcp, models, skills, suggestions, thread_runs, threads, uploads
+
+__all__ = ["artifacts", "assistants_compat", "mcp", "models", "skills", "suggestions", "threads", "thread_runs", "uploads"]

backend/app/gateway/routers/agents.py

@@ -0,0 +1,383 @@
+"""CRUD API for custom agents."""
+
+import logging
+import re
+import shutil
+
+import yaml
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel, Field
+
+from deerflow.config.agents_config import AgentConfig, list_custom_agents, load_agent_config, load_agent_soul
+from deerflow.config.paths import get_paths
+
+logger = logging.getLogger(__name__)
+router = APIRouter(prefix="/api", tags=["agents"])
+
+AGENT_NAME_PATTERN = re.compile(r"^[A-Za-z0-9-]+$")
+
+
+class AgentResponse(BaseModel):
+    """Response model for a custom agent."""
+
+    name: str = Field(..., description="Agent name (hyphen-case)")
+    description: str = Field(default="", description="Agent description")
+    model: str | None = Field(default=None, description="Optional model override")
+    tool_groups: list[str] | None = Field(default=None, description="Optional tool group whitelist")
+    soul: str | None = Field(default=None, description="SOUL.md content")
+
+
+class AgentsListResponse(BaseModel):
+    """Response model for listing all custom agents."""
+
+    agents: list[AgentResponse]
+
+
+class AgentCreateRequest(BaseModel):
+    """Request body for creating a custom agent."""
+
+    name: str = Field(..., description="Agent name (must match ^[A-Za-z0-9-]+$, stored as lowercase)")
+    description: str = Field(default="", description="Agent description")
+    model: str | None = Field(default=None, description="Optional model override")
+    tool_groups: list[str] | None = Field(default=None, description="Optional tool group whitelist")
+    soul: str = Field(default="", description="SOUL.md content — agent personality and behavioral guardrails")
+
+
+class AgentUpdateRequest(BaseModel):
+    """Request body for updating a custom agent."""
+
+    description: str | None = Field(default=None, description="Updated description")
+    model: str | None = Field(default=None, description="Updated model override")
+    tool_groups: list[str] | None = Field(default=None, description="Updated tool group whitelist")
+    soul: str | None = Field(default=None, description="Updated SOUL.md content")
+
+
+def _validate_agent_name(name: str) -> None:
+    """Validate agent name against allowed pattern.
+
+    Args:
+        name: The agent name to validate.
+
+    Raises:
+        HTTPException: 422 if the name is invalid.
+    """
+    if not AGENT_NAME_PATTERN.match(name):
+        raise HTTPException(
+            status_code=422,
+            detail=f"Invalid agent name '{name}'. Must match ^[A-Za-z0-9-]+$ (letters, digits, and hyphens only).",
+        )
+
+
+def _normalize_agent_name(name: str) -> str:
+    """Normalize agent name to lowercase for filesystem storage."""
+    return name.lower()
+
+
+def _agent_config_to_response(agent_cfg: AgentConfig, include_soul: bool = False) -> AgentResponse:
+    """Convert AgentConfig to AgentResponse."""
+    soul: str | None = None
+    if include_soul:
+        soul = load_agent_soul(agent_cfg.name) or ""
+
+    return AgentResponse(
+        name=agent_cfg.name,
+        description=agent_cfg.description,
+        model=agent_cfg.model,
+        tool_groups=agent_cfg.tool_groups,
+        soul=soul,
+    )
+
+
+@router.get(
+    "/agents",
+    response_model=AgentsListResponse,
+    summary="List Custom Agents",
+    description="List all custom agents available in the agents directory, including their soul content.",
+)
+async def list_agents() -> AgentsListResponse:
+    """List all custom agents.
+
+    Returns:
+        List of all custom agents with their metadata and soul content.
+    """
+    try:
+        agents = list_custom_agents()
+        return AgentsListResponse(agents=[_agent_config_to_response(a, include_soul=True) for a in agents])
+    except Exception as e:
+        logger.error(f"Failed to list agents: {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to list agents: {str(e)}")
+
+
+@router.get(
+    "/agents/check",
+    summary="Check Agent Name",
+    description="Validate an agent name and check if it is available (case-insensitive).",
+)
+async def check_agent_name(name: str) -> dict:
+    """Check whether an agent name is valid and not yet taken.
+
+    Args:
+        name: The agent name to check.
+
+    Returns:
+        ``{"available": true/false, "name": "<normalized>"}``
+
+    Raises:
+        HTTPException: 422 if the name is invalid.
+    """
+    _validate_agent_name(name)
+    normalized = _normalize_agent_name(name)
+    available = not get_paths().agent_dir(normalized).exists()
+    return {"available": available, "name": normalized}
+
+
+@router.get(
+    "/agents/{name}",
+    response_model=AgentResponse,
+    summary="Get Custom Agent",
+    description="Retrieve details and SOUL.md content for a specific custom agent.",
+)
+async def get_agent(name: str) -> AgentResponse:
+    """Get a specific custom agent by name.
+
+    Args:
+        name: The agent name.
+
+    Returns:
+        Agent details including SOUL.md content.
+
+    Raises:
+        HTTPException: 404 if agent not found.
+    """
+    _validate_agent_name(name)
+    name = _normalize_agent_name(name)
+
+    try:
+        agent_cfg = load_agent_config(name)
+        return _agent_config_to_response(agent_cfg, include_soul=True)
+    except FileNotFoundError:
+        raise HTTPException(status_code=404, detail=f"Agent '{name}' not found")
+    except Exception as e:
+        logger.error(f"Failed to get agent '{name}': {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to get agent: {str(e)}")
+
+
+@router.post(
+    "/agents",
+    response_model=AgentResponse,
+    status_code=201,
+    summary="Create Custom Agent",
+    description="Create a new custom agent with its config and SOUL.md.",
+)
+async def create_agent_endpoint(request: AgentCreateRequest) -> AgentResponse:
+    """Create a new custom agent.
+
+    Args:
+        request: The agent creation request.
+
+    Returns:
+        The created agent details.
+
+    Raises:
+        HTTPException: 409 if agent already exists, 422 if name is invalid.
+    """
+    _validate_agent_name(request.name)
+    normalized_name = _normalize_agent_name(request.name)
+
+    agent_dir = get_paths().agent_dir(normalized_name)
+
+    if agent_dir.exists():
+        raise HTTPException(status_code=409, detail=f"Agent '{normalized_name}' already exists")
+
+    try:
+        agent_dir.mkdir(parents=True, exist_ok=True)
+
+        # Write config.yaml
+        config_data: dict = {"name": normalized_name}
+        if request.description:
+            config_data["description"] = request.description
+        if request.model is not None:
+            config_data["model"] = request.model
+        if request.tool_groups is not None:
+            config_data["tool_groups"] = request.tool_groups
+
+        config_file = agent_dir / "config.yaml"
+        with open(config_file, "w", encoding="utf-8") as f:
+            yaml.dump(config_data, f, default_flow_style=False, allow_unicode=True)
+
+        # Write SOUL.md
+        soul_file = agent_dir / "SOUL.md"
+        soul_file.write_text(request.soul, encoding="utf-8")
+
+        logger.info(f"Created agent '{normalized_name}' at {agent_dir}")
+
+        agent_cfg = load_agent_config(normalized_name)
+        return _agent_config_to_response(agent_cfg, include_soul=True)
+
+    except HTTPException:
+        raise
+    except Exception as e:
+        # Clean up on failure
+        if agent_dir.exists():
+            shutil.rmtree(agent_dir)
+        logger.error(f"Failed to create agent '{request.name}': {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to create agent: {str(e)}")
+
+
+@router.put(
+    "/agents/{name}",
+    response_model=AgentResponse,
+    summary="Update Custom Agent",
+    description="Update an existing custom agent's config and/or SOUL.md.",
+)
+async def update_agent(name: str, request: AgentUpdateRequest) -> AgentResponse:
+    """Update an existing custom agent.
+
+    Args:
+        name: The agent name.
+        request: The update request (all fields optional).
+
+    Returns:
+        The updated agent details.
+
+    Raises:
+        HTTPException: 404 if agent not found.
+    """
+    _validate_agent_name(name)
+    name = _normalize_agent_name(name)
+
+    try:
+        agent_cfg = load_agent_config(name)
+    except FileNotFoundError:
+        raise HTTPException(status_code=404, detail=f"Agent '{name}' not found")
+
+    agent_dir = get_paths().agent_dir(name)
+
+    try:
+        # Update config if any config fields changed
+        config_changed = any(v is not None for v in [request.description, request.model, request.tool_groups])
+
+        if config_changed:
+            updated: dict = {
+                "name": agent_cfg.name,
+                "description": request.description if request.description is not None else agent_cfg.description,
+            }
+            new_model = request.model if request.model is not None else agent_cfg.model
+            if new_model is not None:
+                updated["model"] = new_model
+
+            new_tool_groups = request.tool_groups if request.tool_groups is not None else agent_cfg.tool_groups
+            if new_tool_groups is not None:
+                updated["tool_groups"] = new_tool_groups
+
+            config_file = agent_dir / "config.yaml"
+            with open(config_file, "w", encoding="utf-8") as f:
+                yaml.dump(updated, f, default_flow_style=False, allow_unicode=True)
+
+        # Update SOUL.md if provided
+        if request.soul is not None:
+            soul_path = agent_dir / "SOUL.md"
+            soul_path.write_text(request.soul, encoding="utf-8")
+
+        logger.info(f"Updated agent '{name}'")
+
+        refreshed_cfg = load_agent_config(name)
+        return _agent_config_to_response(refreshed_cfg, include_soul=True)
+
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Failed to update agent '{name}': {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to update agent: {str(e)}")
+
+
+class UserProfileResponse(BaseModel):
+    """Response model for the global user profile (USER.md)."""
+
+    content: str | None = Field(default=None, description="USER.md content, or null if not yet created")
+
+
+class UserProfileUpdateRequest(BaseModel):
+    """Request body for setting the global user profile."""
+
+    content: str = Field(default="", description="USER.md content — describes the user's background and preferences")
+
+
+@router.get(
+    "/user-profile",
+    response_model=UserProfileResponse,
+    summary="Get User Profile",
+    description="Read the global USER.md file that is injected into all custom agents.",
+)
+async def get_user_profile() -> UserProfileResponse:
+    """Return the current USER.md content.
+
+    Returns:
+        UserProfileResponse with content=None if USER.md does not exist yet.
+    """
+    try:
+        user_md_path = get_paths().user_md_file
+        if not user_md_path.exists():
+            return UserProfileResponse(content=None)
+        raw = user_md_path.read_text(encoding="utf-8").strip()
+        return UserProfileResponse(content=raw or None)
+    except Exception as e:
+        logger.error(f"Failed to read user profile: {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to read user profile: {str(e)}")
+
+
+@router.put(
+    "/user-profile",
+    response_model=UserProfileResponse,
+    summary="Update User Profile",
+    description="Write the global USER.md file that is injected into all custom agents.",
+)
+async def update_user_profile(request: UserProfileUpdateRequest) -> UserProfileResponse:
+    """Create or overwrite the global USER.md.
+
+    Args:
+        request: The update request with the new USER.md content.
+
+    Returns:
+        UserProfileResponse with the saved content.
+    """
+    try:
+        paths = get_paths()
+        paths.base_dir.mkdir(parents=True, exist_ok=True)
+        paths.user_md_file.write_text(request.content, encoding="utf-8")
+        logger.info(f"Updated USER.md at {paths.user_md_file}")
+        return UserProfileResponse(content=request.content or None)
+    except Exception as e:
+        logger.error(f"Failed to update user profile: {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to update user profile: {str(e)}")
+
+
+@router.delete(
+    "/agents/{name}",
+    status_code=204,
+    summary="Delete Custom Agent",
+    description="Delete a custom agent and all its files (config, SOUL.md, memory).",
+)
+async def delete_agent(name: str) -> None:
+    """Delete a custom agent.
+
+    Args:
+        name: The agent name.
+
+    Raises:
+        HTTPException: 404 if agent not found.
+    """
+    _validate_agent_name(name)
+    name = _normalize_agent_name(name)
+
+    agent_dir = get_paths().agent_dir(name)
+
+    if not agent_dir.exists():
+        raise HTTPException(status_code=404, detail=f"Agent '{name}' not found")
+
+    try:
+        shutil.rmtree(agent_dir)
+        logger.info(f"Deleted agent '{name}' from {agent_dir}")
+    except Exception as e:
+        logger.error(f"Failed to delete agent '{name}': {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to delete agent: {str(e)}")

backend/app/gateway/routers/artifacts.py

@@ -0,0 +1,183 @@
+import logging
+import mimetypes
+import zipfile
+from pathlib import Path
+from urllib.parse import quote
+
+from fastapi import APIRouter, HTTPException, Request
+from fastapi.responses import FileResponse, PlainTextResponse, Response
+
+from app.gateway.authz import require_permission
+from app.gateway.path_utils import resolve_thread_virtual_path
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/api", tags=["artifacts"])
+
+ACTIVE_CONTENT_MIME_TYPES = {
+    "text/html",
+    "application/xhtml+xml",
+    "image/svg+xml",
+}
+
+
+def _build_content_disposition(disposition_type: str, filename: str) -> str:
+    """Build an RFC 5987 encoded Content-Disposition header value."""
+    return f"{disposition_type}; filename*=UTF-8''{quote(filename)}"
+
+
+def _build_attachment_headers(filename: str, extra_headers: dict[str, str] | None = None) -> dict[str, str]:
+    headers = {"Content-Disposition": _build_content_disposition("attachment", filename)}
+    if extra_headers:
+        headers.update(extra_headers)
+    return headers
+
+
+def is_text_file_by_content(path: Path, sample_size: int = 8192) -> bool:
+    """Check if file is text by examining content for null bytes."""
+    try:
+        with open(path, "rb") as f:
+            chunk = f.read(sample_size)
+            # Text files shouldn't contain null bytes
+            return b"\x00" not in chunk
+    except Exception:
+        return False
+
+
+def _extract_file_from_skill_archive(zip_path: Path, internal_path: str) -> bytes | None:
+    """Extract a file from a .skill ZIP archive.
+
+    Args:
+        zip_path: Path to the .skill file (ZIP archive).
+        internal_path: Path to the file inside the archive (e.g., "SKILL.md").
+
+    Returns:
+        The file content as bytes, or None if not found.
+    """
+    if not zipfile.is_zipfile(zip_path):
+        return None
+
+    try:
+        with zipfile.ZipFile(zip_path, "r") as zip_ref:
+            # List all files in the archive
+            namelist = zip_ref.namelist()
+
+            # Try direct path first
+            if internal_path in namelist:
+                return zip_ref.read(internal_path)
+
+            # Try with any top-level directory prefix (e.g., "skill-name/SKILL.md")
+            for name in namelist:
+                if name.endswith("/" + internal_path) or name == internal_path:
+                    return zip_ref.read(name)
+
+            # Not found
+            return None
+    except (zipfile.BadZipFile, KeyError):
+        return None
+
+
+@router.get(
+    "/threads/{thread_id}/artifacts/{path:path}",
+    summary="Get Artifact File",
+    description="Retrieve an artifact file generated by the AI agent. Text and binary files can be viewed inline, while active web content is always downloaded.",
+)
+@require_permission("threads", "read", owner_check=True)
+async def get_artifact(thread_id: str, path: str, request: Request, download: bool = False) -> Response:
+    """Get an artifact file by its path.
+
+    The endpoint automatically detects file types and returns appropriate content types.
+    Use the `download` query parameter to force file download for non-active content.
+
+    Args:
+        thread_id: The thread ID.
+        path: The artifact path with virtual prefix (e.g., mnt/user-data/outputs/file.txt).
+        request: FastAPI request object (automatically injected).
+
+    Returns:
+        The file content as a FileResponse with appropriate content type:
+        - Active content (HTML/XHTML/SVG): Served as download attachment
+        - Text files: Plain text with proper MIME type
+        - Binary files: Inline display with download option
+
+    Raises:
+        HTTPException:
+            - 400 if path is invalid or not a file
+            - 403 if access denied (path traversal detected)
+            - 404 if file not found
+
+    Query Parameters:
+        download (bool): If true, forces attachment download for file types that are
+            otherwise returned inline or as plain text. Active HTML/XHTML/SVG content
+            is always downloaded regardless of this flag.
+
+    Example:
+        - Get text file inline: `/api/threads/abc123/artifacts/mnt/user-data/outputs/notes.txt`
+        - Download file: `/api/threads/abc123/artifacts/mnt/user-data/outputs/data.csv?download=true`
+        - Active web content such as `.html`, `.xhtml`, and `.svg` artifacts is always downloaded
+    """
+    # Check if this is a request for a file inside a .skill archive (e.g., xxx.skill/SKILL.md)
+    if ".skill/" in path:
+        # Split the path at ".skill/" to get the ZIP file path and internal path
+        skill_marker = ".skill/"
+        marker_pos = path.find(skill_marker)
+        skill_file_path = path[: marker_pos + len(".skill")]  # e.g., "mnt/user-data/outputs/my-skill.skill"
+        internal_path = path[marker_pos + len(skill_marker) :]  # e.g., "SKILL.md"
+
+        actual_skill_path = resolve_thread_virtual_path(thread_id, skill_file_path)
+
+        if not actual_skill_path.exists():
+            raise HTTPException(status_code=404, detail=f"Skill file not found: {skill_file_path}")
+
+        if not actual_skill_path.is_file():
+            raise HTTPException(status_code=400, detail=f"Path is not a file: {skill_file_path}")
+
+        # Extract the file from the .skill archive
+        content = _extract_file_from_skill_archive(actual_skill_path, internal_path)
+        if content is None:
+            raise HTTPException(status_code=404, detail=f"File '{internal_path}' not found in skill archive")
+
+        # Determine MIME type based on the internal file
+        mime_type, _ = mimetypes.guess_type(internal_path)
+        # Add cache headers to avoid repeated ZIP extraction (cache for 5 minutes)
+        cache_headers = {"Cache-Control": "private, max-age=300"}
+        download_name = Path(internal_path).name or actual_skill_path.stem
+        if download or mime_type in ACTIVE_CONTENT_MIME_TYPES:
+            return Response(content=content, media_type=mime_type or "application/octet-stream", headers=_build_attachment_headers(download_name, cache_headers))
+
+        if mime_type and mime_type.startswith("text/"):
+            return PlainTextResponse(content=content.decode("utf-8"), media_type=mime_type, headers=cache_headers)
+
+        # Default to plain text for unknown types that look like text
+        try:
+            return PlainTextResponse(content=content.decode("utf-8"), media_type="text/plain", headers=cache_headers)
+        except UnicodeDecodeError:
+            return Response(content=content, media_type=mime_type or "application/octet-stream", headers=cache_headers)
+
+    actual_path = resolve_thread_virtual_path(thread_id, path)
+
+    logger.info(f"Resolving artifact path: thread_id={thread_id}, requested_path={path}, actual_path={actual_path}")
+
+    if not actual_path.exists():
+        raise HTTPException(status_code=404, detail=f"Artifact not found: {path}")
+
+    if not actual_path.is_file():
+        raise HTTPException(status_code=400, detail=f"Path is not a file: {path}")
+
+    mime_type, _ = mimetypes.guess_type(actual_path)
+
+    if download:
+        return FileResponse(path=actual_path, filename=actual_path.name, media_type=mime_type, headers=_build_attachment_headers(actual_path.name))
+
+    # Always force download for active content types to prevent script execution
+    # in the application origin when users open generated artifacts.
+    if mime_type in ACTIVE_CONTENT_MIME_TYPES:
+        return FileResponse(path=actual_path, filename=actual_path.name, media_type=mime_type, headers=_build_attachment_headers(actual_path.name))
+
+    if mime_type and mime_type.startswith("text/"):
+        return PlainTextResponse(content=actual_path.read_text(encoding="utf-8"), media_type=mime_type)
+
+    if is_text_file_by_content(actual_path):
+        return PlainTextResponse(content=actual_path.read_text(encoding="utf-8"), media_type=mime_type)
+
+    return Response(content=actual_path.read_bytes(), media_type=mime_type, headers={"Content-Disposition": _build_content_disposition("inline", actual_path.name)})

backend/app/gateway/routers/assistants_compat.py

@@ -0,0 +1,149 @@
+"""Assistants compatibility endpoints.
+
+Provides LangGraph Platform-compatible assistants API backed by the
+``langgraph.json`` graph registry and ``config.yaml`` agent definitions.
+
+This is a minimal stub that satisfies the ``useStream`` React hook's
+initialization requirements (``assistants.search()`` and ``assistants.get()``).
+"""
+
+from __future__ import annotations
+
+import logging
+from datetime import UTC, datetime
+from typing import Any
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel, Field
+
+logger = logging.getLogger(__name__)
+router = APIRouter(prefix="/api/assistants", tags=["assistants-compat"])
+
+
+class AssistantResponse(BaseModel):
+    assistant_id: str
+    graph_id: str
+    name: str
+    config: dict[str, Any] = Field(default_factory=dict)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+    description: str | None = None
+    created_at: str = ""
+    updated_at: str = ""
+    version: int = 1
+
+
+class AssistantSearchRequest(BaseModel):
+    graph_id: str | None = None
+    name: str | None = None
+    metadata: dict[str, Any] | None = None
+    limit: int = 10
+    offset: int = 0
+
+
+def _get_default_assistant() -> AssistantResponse:
+    """Return the default lead_agent assistant."""
+    now = datetime.now(UTC).isoformat()
+    return AssistantResponse(
+        assistant_id="lead_agent",
+        graph_id="lead_agent",
+        name="lead_agent",
+        config={},
+        metadata={"created_by": "system"},
+        description="DeerFlow lead agent",
+        created_at=now,
+        updated_at=now,
+        version=1,
+    )
+
+
+def _list_assistants() -> list[AssistantResponse]:
+    """List all available assistants from config."""
+    assistants = [_get_default_assistant()]
+
+    # Also include custom agents from config.yaml agents directory
+    try:
+        from deerflow.config.agents_config import list_custom_agents
+
+        for agent_cfg in list_custom_agents():
+            now = datetime.now(UTC).isoformat()
+            assistants.append(
+                AssistantResponse(
+                    assistant_id=agent_cfg.name,
+                    graph_id="lead_agent",  # All agents use the same graph
+                    name=agent_cfg.name,
+                    config={},
+                    metadata={"created_by": "user"},
+                    description=agent_cfg.description or "",
+                    created_at=now,
+                    updated_at=now,
+                    version=1,
+                )
+            )
+    except Exception:
+        logger.debug("Could not load custom agents for assistants list")
+
+    return assistants
+
+
+@router.post("/search", response_model=list[AssistantResponse])
+async def search_assistants(body: AssistantSearchRequest | None = None) -> list[AssistantResponse]:
+    """Search assistants.
+
+    Returns all registered assistants (lead_agent + custom agents from config).
+    """
+    assistants = _list_assistants()
+
+    if body and body.graph_id:
+        assistants = [a for a in assistants if a.graph_id == body.graph_id]
+    if body and body.name:
+        assistants = [a for a in assistants if body.name.lower() in a.name.lower()]
+
+    offset = body.offset if body else 0
+    limit = body.limit if body else 10
+    return assistants[offset : offset + limit]
+
+
+@router.get("/{assistant_id}", response_model=AssistantResponse)
+async def get_assistant_compat(assistant_id: str) -> AssistantResponse:
+    """Get an assistant by ID."""
+    for a in _list_assistants():
+        if a.assistant_id == assistant_id:
+            return a
+    raise HTTPException(status_code=404, detail=f"Assistant {assistant_id} not found")
+
+
+@router.get("/{assistant_id}/graph")
+async def get_assistant_graph(assistant_id: str) -> dict:
+    """Get the graph structure for an assistant.
+
+    Returns a minimal graph description. Full graph introspection is
+    not supported in the Gateway — this stub satisfies SDK validation.
+    """
+    found = any(a.assistant_id == assistant_id for a in _list_assistants())
+    if not found:
+        raise HTTPException(status_code=404, detail=f"Assistant {assistant_id} not found")
+
+    return {
+        "graph_id": "lead_agent",
+        "nodes": [],
+        "edges": [],
+    }
+
+
+@router.get("/{assistant_id}/schemas")
+async def get_assistant_schemas(assistant_id: str) -> dict:
+    """Get JSON schemas for an assistant's input/output/state.
+
+    Returns empty schemas — full introspection not supported in Gateway.
+    """
+    found = any(a.assistant_id == assistant_id for a in _list_assistants())
+    if not found:
+        raise HTTPException(status_code=404, detail=f"Assistant {assistant_id} not found")
+
+    return {
+        "graph_id": "lead_agent",
+        "input_schema": {},
+        "output_schema": {},
+        "state_schema": {},
+        "config_schema": {},
+    }

backend/app/gateway/routers/auth.py

@@ -0,0 +1,303 @@
+"""Authentication endpoints."""
+
+import logging
+import time
+
+from fastapi import APIRouter, Depends, HTTPException, Request, Response, status
+from fastapi.security import OAuth2PasswordRequestForm
+from pydantic import BaseModel, EmailStr, Field
+
+from app.gateway.auth import (
+    UserResponse,
+    create_access_token,
+)
+from app.gateway.auth.config import get_auth_config
+from app.gateway.auth.errors import AuthErrorCode, AuthErrorResponse
+from app.gateway.csrf_middleware import is_secure_request
+from app.gateway.deps import get_current_user_from_request, get_local_provider
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/api/v1/auth", tags=["auth"])
+
+
+# ── Request/Response Models ──────────────────────────────────────────────
+
+
+class LoginResponse(BaseModel):
+    """Response model for login — token only lives in HttpOnly cookie."""
+
+    expires_in: int  # seconds
+    needs_setup: bool = False
+
+
+class RegisterRequest(BaseModel):
+    """Request model for user registration."""
+
+    email: EmailStr
+    password: str = Field(..., min_length=8)
+
+
+class ChangePasswordRequest(BaseModel):
+    """Request model for password change (also handles setup flow)."""
+
+    current_password: str
+    new_password: str = Field(..., min_length=8)
+    new_email: EmailStr | None = None
+
+
+class MessageResponse(BaseModel):
+    """Generic message response."""
+
+    message: str
+
+
+# ── Helpers ───────────────────────────────────────────────────────────────
+
+
+def _set_session_cookie(response: Response, token: str, request: Request) -> None:
+    """Set the access_token HttpOnly cookie on the response."""
+    config = get_auth_config()
+    is_https = is_secure_request(request)
+    response.set_cookie(
+        key="access_token",
+        value=token,
+        httponly=True,
+        secure=is_https,
+        samesite="lax",
+        max_age=config.token_expiry_days * 24 * 3600 if is_https else None,
+    )
+
+
+# ── Rate Limiting ────────────────────────────────────────────────────────
+# In-process dict — not shared across workers. Sufficient for single-worker deployments.
+
+_MAX_LOGIN_ATTEMPTS = 5
+_LOCKOUT_SECONDS = 300  # 5 minutes
+
+# ip → (fail_count, lock_until_timestamp)
+_login_attempts: dict[str, tuple[int, float]] = {}
+
+
+def _get_client_ip(request: Request) -> str:
+    """Extract the real client IP for rate limiting.
+
+    Uses ``X-Real-IP`` header set by nginx (``proxy_set_header X-Real-IP
+    $remote_addr``).  Nginx unconditionally overwrites any client-supplied
+    ``X-Real-IP``, so the value seen by Gateway is always the TCP peer IP
+    that nginx observed — it cannot be spoofed by the client.
+
+    ``request.client.host`` is NOT reliable because uvicorn's default
+    ``proxy_headers=True`` replaces it with the *first* entry from
+    ``X-Forwarded-For``, which IS client-spoofable.
+
+    ``X-Forwarded-For`` is intentionally NOT used for the same reason.
+    """
+    real_ip = request.headers.get("x-real-ip", "").strip()
+    if real_ip:
+        return real_ip
+
+    # Fallback: direct connection without nginx (e.g. unit tests, dev).
+    return request.client.host if request.client else "unknown"
+
+
+def _check_rate_limit(ip: str) -> None:
+    """Raise 429 if the IP is currently locked out."""
+    record = _login_attempts.get(ip)
+    if record is None:
+        return
+    fail_count, lock_until = record
+    if fail_count >= _MAX_LOGIN_ATTEMPTS:
+        if time.time() < lock_until:
+            raise HTTPException(
+                status_code=429,
+                detail="Too many login attempts. Try again later.",
+            )
+        del _login_attempts[ip]
+
+
+_MAX_TRACKED_IPS = 10000
+
+
+def _record_login_failure(ip: str) -> None:
+    """Record a failed login attempt for the given IP."""
+    # Evict expired lockouts when dict grows too large
+    if len(_login_attempts) >= _MAX_TRACKED_IPS:
+        now = time.time()
+        expired = [k for k, (c, t) in _login_attempts.items() if c >= _MAX_LOGIN_ATTEMPTS and now >= t]
+        for k in expired:
+            del _login_attempts[k]
+        # If still too large, evict cheapest-to-lose half: below-threshold
+        # IPs (lock_until=0.0) sort first, then earliest-expiring lockouts.
+        if len(_login_attempts) >= _MAX_TRACKED_IPS:
+            by_time = sorted(_login_attempts.items(), key=lambda kv: kv[1][1])
+            for k, _ in by_time[: len(by_time) // 2]:
+                del _login_attempts[k]
+
+    record = _login_attempts.get(ip)
+    if record is None:
+        _login_attempts[ip] = (1, 0.0)
+    else:
+        new_count = record[0] + 1
+        lock_until = time.time() + _LOCKOUT_SECONDS if new_count >= _MAX_LOGIN_ATTEMPTS else 0.0
+        _login_attempts[ip] = (new_count, lock_until)
+
+
+def _record_login_success(ip: str) -> None:
+    """Clear failure counter for the given IP on successful login."""
+    _login_attempts.pop(ip, None)
+
+
+# ── Endpoints ─────────────────────────────────────────────────────────────
+
+
+@router.post("/login/local", response_model=LoginResponse)
+async def login_local(
+    request: Request,
+    response: Response,
+    form_data: OAuth2PasswordRequestForm = Depends(),
+):
+    """Local email/password login."""
+    client_ip = _get_client_ip(request)
+    _check_rate_limit(client_ip)
+
+    user = await get_local_provider().authenticate({"email": form_data.username, "password": form_data.password})
+
+    if user is None:
+        _record_login_failure(client_ip)
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail=AuthErrorResponse(code=AuthErrorCode.INVALID_CREDENTIALS, message="Incorrect email or password").model_dump(),
+        )
+
+    _record_login_success(client_ip)
+    token = create_access_token(str(user.id), token_version=user.token_version)
+    _set_session_cookie(response, token, request)
+
+    return LoginResponse(
+        expires_in=get_auth_config().token_expiry_days * 24 * 3600,
+        needs_setup=user.needs_setup,
+    )
+
+
+@router.post("/register", response_model=UserResponse, status_code=status.HTTP_201_CREATED)
+async def register(request: Request, response: Response, body: RegisterRequest):
+    """Register a new user account (always 'user' role).
+
+    Admin is auto-created on first boot. This endpoint creates regular users.
+    Auto-login by setting the session cookie.
+    """
+    try:
+        user = await get_local_provider().create_user(email=body.email, password=body.password, system_role="user")
+    except ValueError:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=AuthErrorResponse(code=AuthErrorCode.EMAIL_ALREADY_EXISTS, message="Email already registered").model_dump(),
+        )
+
+    token = create_access_token(str(user.id), token_version=user.token_version)
+    _set_session_cookie(response, token, request)
+
+    return UserResponse(id=str(user.id), email=user.email, system_role=user.system_role)
+
+
+@router.post("/logout", response_model=MessageResponse)
+async def logout(request: Request, response: Response):
+    """Logout current user by clearing the cookie."""
+    response.delete_cookie(key="access_token", secure=is_secure_request(request), samesite="lax")
+    return MessageResponse(message="Successfully logged out")
+
+
+@router.post("/change-password", response_model=MessageResponse)
+async def change_password(request: Request, response: Response, body: ChangePasswordRequest):
+    """Change password for the currently authenticated user.
+
+    Also handles the first-boot setup flow:
+    - If new_email is provided, updates email (checks uniqueness)
+    - If user.needs_setup is True and new_email is given, clears needs_setup
+    - Always increments token_version to invalidate old sessions
+    - Re-issues session cookie with new token_version
+    """
+    from app.gateway.auth.password import hash_password_async, verify_password_async
+
+    user = await get_current_user_from_request(request)
+
+    if user.password_hash is None:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=AuthErrorResponse(code=AuthErrorCode.INVALID_CREDENTIALS, message="OAuth users cannot change password").model_dump())
+
+    if not await verify_password_async(body.current_password, user.password_hash):
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=AuthErrorResponse(code=AuthErrorCode.INVALID_CREDENTIALS, message="Current password is incorrect").model_dump())
+
+    provider = get_local_provider()
+
+    # Update email if provided
+    if body.new_email is not None:
+        existing = await provider.get_user_by_email(body.new_email)
+        if existing and str(existing.id) != str(user.id):
+            raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=AuthErrorResponse(code=AuthErrorCode.EMAIL_ALREADY_EXISTS, message="Email already in use").model_dump())
+        user.email = body.new_email
+
+    # Update password + bump version
+    user.password_hash = await hash_password_async(body.new_password)
+    user.token_version += 1
+
+    # Clear setup flag if this is the setup flow
+    if user.needs_setup and body.new_email is not None:
+        user.needs_setup = False
+
+    await provider.update_user(user)
+
+    # Re-issue cookie with new token_version
+    token = create_access_token(str(user.id), token_version=user.token_version)
+    _set_session_cookie(response, token, request)
+
+    return MessageResponse(message="Password changed successfully")
+
+
+@router.get("/me", response_model=UserResponse)
+async def get_me(request: Request):
+    """Get current authenticated user info."""
+    user = await get_current_user_from_request(request)
+    return UserResponse(id=str(user.id), email=user.email, system_role=user.system_role, needs_setup=user.needs_setup)
+
+
+@router.get("/setup-status")
+async def setup_status():
+    """Check if admin account exists. Always False after first boot."""
+    user_count = await get_local_provider().count_users()
+    return {"needs_setup": user_count == 0}
+
+
+# ── OAuth Endpoints (Future/Placeholder) ─────────────────────────────────
+
+
+@router.get("/oauth/{provider}")
+async def oauth_login(provider: str):
+    """Initiate OAuth login flow.
+
+    Redirects to the OAuth provider's authorization URL.
+    Currently a placeholder - requires OAuth provider implementation.
+    """
+    if provider not in ["github", "google"]:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=f"Unsupported OAuth provider: {provider}",
+        )
+
+    raise HTTPException(
+        status_code=status.HTTP_501_NOT_IMPLEMENTED,
+        detail="OAuth login not yet implemented",
+    )
+
+
+@router.get("/callback/{provider}")
+async def oauth_callback(provider: str, code: str, state: str):
+    """OAuth callback endpoint.
+
+    Handles the OAuth provider's callback after user authorization.
+    Currently a placeholder.
+    """
+    raise HTTPException(
+        status_code=status.HTTP_501_NOT_IMPLEMENTED,
+        detail="OAuth callback not yet implemented",
+    )

backend/app/gateway/routers/channels.py

@@ -0,0 +1,52 @@
+"""Gateway router for IM channel management."""
+
+from __future__ import annotations
+
+import logging
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/api/channels", tags=["channels"])
+
+
+class ChannelStatusResponse(BaseModel):
+    service_running: bool
+    channels: dict[str, dict]
+
+
+class ChannelRestartResponse(BaseModel):
+    success: bool
+    message: str
+
+
+@router.get("/", response_model=ChannelStatusResponse)
+async def get_channels_status() -> ChannelStatusResponse:
+    """Get the status of all IM channels."""
+    from app.channels.service import get_channel_service
+
+    service = get_channel_service()
+    if service is None:
+        return ChannelStatusResponse(service_running=False, channels={})
+    status = service.get_status()
+    return ChannelStatusResponse(**status)
+
+
+@router.post("/{name}/restart", response_model=ChannelRestartResponse)
+async def restart_channel(name: str) -> ChannelRestartResponse:
+    """Restart a specific IM channel."""
+    from app.channels.service import get_channel_service
+
+    service = get_channel_service()
+    if service is None:
+        raise HTTPException(status_code=503, detail="Channel service is not running")
+
+    success = await service.restart_channel(name)
+    if success:
+        logger.info("Channel %s restarted successfully", name)
+        return ChannelRestartResponse(success=True, message=f"Channel {name} restarted successfully")
+    else:
+        logger.warning("Failed to restart channel %s", name)
+        return ChannelRestartResponse(success=False, message=f"Failed to restart channel {name}")

backend/app/gateway/routers/feedback.py

@@ -0,0 +1,132 @@
+"""Feedback endpoints — create, list, stats, delete.
+
+Allows users to submit thumbs-up/down feedback on runs,
+optionally scoped to a specific message.
+"""
+
+from __future__ import annotations
+
+import logging
+from typing import Any
+
+from fastapi import APIRouter, HTTPException, Request
+from pydantic import BaseModel, Field
+
+from app.gateway.authz import require_permission
+from app.gateway.deps import get_current_user, get_feedback_repo, get_run_store
+
+logger = logging.getLogger(__name__)
+router = APIRouter(prefix="/api/threads", tags=["feedback"])
+
+
+# ---------------------------------------------------------------------------
+# Request / response models
+# ---------------------------------------------------------------------------
+
+
+class FeedbackCreateRequest(BaseModel):
+    rating: int = Field(..., description="Feedback rating: +1 (positive) or -1 (negative)")
+    comment: str | None = Field(default=None, description="Optional text feedback")
+    message_id: str | None = Field(default=None, description="Optional: scope feedback to a specific message")
+
+
+class FeedbackResponse(BaseModel):
+    feedback_id: str
+    run_id: str
+    thread_id: str
+    owner_id: str | None = None
+    message_id: str | None = None
+    rating: int
+    comment: str | None = None
+    created_at: str = ""
+
+
+class FeedbackStatsResponse(BaseModel):
+    run_id: str
+    total: int = 0
+    positive: int = 0
+    negative: int = 0
+
+
+# ---------------------------------------------------------------------------
+# Endpoints
+# ---------------------------------------------------------------------------
+
+
+@router.post("/{thread_id}/runs/{run_id}/feedback", response_model=FeedbackResponse)
+@require_permission("threads", "write", owner_check=True)
+async def create_feedback(
+    thread_id: str,
+    run_id: str,
+    body: FeedbackCreateRequest,
+    request: Request,
+) -> dict[str, Any]:
+    """Submit feedback (thumbs-up/down) for a run."""
+    if body.rating not in (1, -1):
+        raise HTTPException(status_code=400, detail="rating must be +1 or -1")
+
+    user_id = await get_current_user(request)
+
+    # Validate run exists and belongs to thread
+    run_store = get_run_store(request)
+    run = await run_store.get(run_id)
+    if run is None:
+        raise HTTPException(status_code=404, detail=f"Run {run_id} not found")
+    if run.get("thread_id") != thread_id:
+        raise HTTPException(status_code=404, detail=f"Run {run_id} not found in thread {thread_id}")
+
+    feedback_repo = get_feedback_repo(request)
+    return await feedback_repo.create(
+        run_id=run_id,
+        thread_id=thread_id,
+        rating=body.rating,
+        owner_id=user_id,
+        message_id=body.message_id,
+        comment=body.comment,
+    )
+
+
+@router.get("/{thread_id}/runs/{run_id}/feedback", response_model=list[FeedbackResponse])
+@require_permission("threads", "read", owner_check=True)
+async def list_feedback(
+    thread_id: str,
+    run_id: str,
+    request: Request,
+) -> list[dict[str, Any]]:
+    """List all feedback for a run."""
+    feedback_repo = get_feedback_repo(request)
+    return await feedback_repo.list_by_run(thread_id, run_id)
+
+
+@router.get("/{thread_id}/runs/{run_id}/feedback/stats", response_model=FeedbackStatsResponse)
+@require_permission("threads", "read", owner_check=True)
+async def feedback_stats(
+    thread_id: str,
+    run_id: str,
+    request: Request,
+) -> dict[str, Any]:
+    """Get aggregated feedback stats (positive/negative counts) for a run."""
+    feedback_repo = get_feedback_repo(request)
+    return await feedback_repo.aggregate_by_run(thread_id, run_id)
+
+
+@router.delete("/{thread_id}/runs/{run_id}/feedback/{feedback_id}")
+@require_permission("threads", "delete", owner_check=True)
+async def delete_feedback(
+    thread_id: str,
+    run_id: str,
+    feedback_id: str,
+    request: Request,
+) -> dict[str, bool]:
+    """Delete a feedback record."""
+    feedback_repo = get_feedback_repo(request)
+    # Verify feedback belongs to the specified thread/run before deleting
+    existing = await feedback_repo.get(feedback_id)
+    if existing is None:
+        raise HTTPException(status_code=404, detail=f"Feedback {feedback_id} not found")
+    if existing.get("thread_id") != thread_id or existing.get("run_id") != run_id:
+        raise HTTPException(status_code=404, detail=f"Feedback {feedback_id} not found in run {run_id}")
+    deleted = await feedback_repo.delete(feedback_id)
+    if not deleted:
+        raise HTTPException(status_code=404, detail=f"Feedback {feedback_id} not found")
+    return {"success": True}

backend/app/gateway/routers/mcp.py

@@ -0,0 +1,169 @@
+import json
+import logging
+from pathlib import Path
+from typing import Literal
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel, Field
+
+from deerflow.config.extensions_config import ExtensionsConfig, get_extensions_config, reload_extensions_config
+
+logger = logging.getLogger(__name__)
+router = APIRouter(prefix="/api", tags=["mcp"])
+
+
+class McpOAuthConfigResponse(BaseModel):
+    """OAuth configuration for an MCP server."""
+
+    enabled: bool = Field(default=True, description="Whether OAuth token injection is enabled")
+    token_url: str = Field(default="", description="OAuth token endpoint URL")
+    grant_type: Literal["client_credentials", "refresh_token"] = Field(default="client_credentials", description="OAuth grant type")
+    client_id: str | None = Field(default=None, description="OAuth client ID")
+    client_secret: str | None = Field(default=None, description="OAuth client secret")
+    refresh_token: str | None = Field(default=None, description="OAuth refresh token")
+    scope: str | None = Field(default=None, description="OAuth scope")
+    audience: str | None = Field(default=None, description="OAuth audience")
+    token_field: str = Field(default="access_token", description="Token response field containing access token")
+    token_type_field: str = Field(default="token_type", description="Token response field containing token type")
+    expires_in_field: str = Field(default="expires_in", description="Token response field containing expires-in seconds")
+    default_token_type: str = Field(default="Bearer", description="Default token type when response omits token_type")
+    refresh_skew_seconds: int = Field(default=60, description="Refresh this many seconds before expiry")
+    extra_token_params: dict[str, str] = Field(default_factory=dict, description="Additional form params sent to token endpoint")
+
+
+class McpServerConfigResponse(BaseModel):
+    """Response model for MCP server configuration."""
+
+    enabled: bool = Field(default=True, description="Whether this MCP server is enabled")
+    type: str = Field(default="stdio", description="Transport type: 'stdio', 'sse', or 'http'")
+    command: str | None = Field(default=None, description="Command to execute to start the MCP server (for stdio type)")
+    args: list[str] = Field(default_factory=list, description="Arguments to pass to the command (for stdio type)")
+    env: dict[str, str] = Field(default_factory=dict, description="Environment variables for the MCP server")
+    url: str | None = Field(default=None, description="URL of the MCP server (for sse or http type)")
+    headers: dict[str, str] = Field(default_factory=dict, description="HTTP headers to send (for sse or http type)")
+    oauth: McpOAuthConfigResponse | None = Field(default=None, description="OAuth configuration for MCP HTTP/SSE servers")
+    description: str = Field(default="", description="Human-readable description of what this MCP server provides")
+
+
+class McpConfigResponse(BaseModel):
+    """Response model for MCP configuration."""
+
+    mcp_servers: dict[str, McpServerConfigResponse] = Field(
+        default_factory=dict,
+        description="Map of MCP server name to configuration",
+    )
+
+
+class McpConfigUpdateRequest(BaseModel):
+    """Request model for updating MCP configuration."""
+
+    mcp_servers: dict[str, McpServerConfigResponse] = Field(
+        ...,
+        description="Map of MCP server name to configuration",
+    )
+
+
+@router.get(
+    "/mcp/config",
+    response_model=McpConfigResponse,
+    summary="Get MCP Configuration",
+    description="Retrieve the current Model Context Protocol (MCP) server configurations.",
+)
+async def get_mcp_configuration() -> McpConfigResponse:
+    """Get the current MCP configuration.
+
+    Returns:
+        The current MCP configuration with all servers.
+
+    Example:
+        ```json
+        {
+            "mcp_servers": {
+                "github": {
+                    "enabled": true,
+                    "command": "npx",
+                    "args": ["-y", "@modelcontextprotocol/server-github"],
+                    "env": {"GITHUB_TOKEN": "ghp_xxx"},
+                    "description": "GitHub MCP server for repository operations"
+                }
+            }
+        }
+        ```
+    """
+    config = get_extensions_config()
+
+    return McpConfigResponse(mcp_servers={name: McpServerConfigResponse(**server.model_dump()) for name, server in config.mcp_servers.items()})
+
+
+@router.put(
+    "/mcp/config",
+    response_model=McpConfigResponse,
+    summary="Update MCP Configuration",
+    description="Update Model Context Protocol (MCP) server configurations and save to file.",
+)
+async def update_mcp_configuration(request: McpConfigUpdateRequest) -> McpConfigResponse:
+    """Update the MCP configuration.
+
+    This will:
+    1. Save the new configuration to the mcp_config.json file
+    2. Reload the configuration cache
+    3. Reset MCP tools cache to trigger reinitialization
+
+    Args:
+        request: The new MCP configuration to save.
+
+    Returns:
+        The updated MCP configuration.
+
+    Raises:
+        HTTPException: 500 if the configuration file cannot be written.
+
+    Example Request:
+        ```json
+        {
+            "mcp_servers": {
+                "github": {
+                    "enabled": true,
+                    "command": "npx",
+                    "args": ["-y", "@modelcontextprotocol/server-github"],
+                    "env": {"GITHUB_TOKEN": "$GITHUB_TOKEN"},
+                    "description": "GitHub MCP server for repository operations"
+                }
+            }
+        }
+        ```
+    """
+    try:
+        # Get the current config path (or determine where to save it)
+        config_path = ExtensionsConfig.resolve_config_path()
+
+        # If no config file exists, create one in the parent directory (project root)
+        if config_path is None:
+            config_path = Path.cwd().parent / "extensions_config.json"
+            logger.info(f"No existing extensions config found. Creating new config at: {config_path}")
+
+        # Load current config to preserve skills configuration
+        current_config = get_extensions_config()
+
+        # Convert request to dict format for JSON serialization
+        config_data = {
+            "mcpServers": {name: server.model_dump() for name, server in request.mcp_servers.items()},
+            "skills": {name: {"enabled": skill.enabled} for name, skill in current_config.skills.items()},
+        }
+
+        # Write the configuration to file
+        with open(config_path, "w", encoding="utf-8") as f:
+            json.dump(config_data, f, indent=2)
+
+        logger.info(f"MCP configuration updated and saved to: {config_path}")
+
+        # NOTE: No need to reload/reset cache here - LangGraph Server (separate process)
+        # will detect config file changes via mtime and reinitialize MCP tools automatically
+
+        # Reload the configuration and update the global cache
+        reloaded_config = reload_extensions_config()
+        return McpConfigResponse(mcp_servers={name: McpServerConfigResponse(**server.model_dump()) for name, server in reloaded_config.mcp_servers.items()})
+
+    except Exception as e:
+        logger.error(f"Failed to update MCP configuration: {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to update MCP configuration: {str(e)}")

backend/app/gateway/routers/memory.py

@@ -0,0 +1,353 @@
+"""Memory API router for retrieving and managing global memory data."""
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel, Field
+
+from deerflow.agents.memory.updater import (
+    clear_memory_data,
+    create_memory_fact,
+    delete_memory_fact,
+    get_memory_data,
+    import_memory_data,
+    reload_memory_data,
+    update_memory_fact,
+)
+from deerflow.config.memory_config import get_memory_config
+
+router = APIRouter(prefix="/api", tags=["memory"])
+
+
+class ContextSection(BaseModel):
+    """Model for context sections (user and history)."""
+
+    summary: str = Field(default="", description="Summary content")
+    updatedAt: str = Field(default="", description="Last update timestamp")
+
+
+class UserContext(BaseModel):
+    """Model for user context."""
+
+    workContext: ContextSection = Field(default_factory=ContextSection)
+    personalContext: ContextSection = Field(default_factory=ContextSection)
+    topOfMind: ContextSection = Field(default_factory=ContextSection)
+
+
+class HistoryContext(BaseModel):
+    """Model for history context."""
+
+    recentMonths: ContextSection = Field(default_factory=ContextSection)
+    earlierContext: ContextSection = Field(default_factory=ContextSection)
+    longTermBackground: ContextSection = Field(default_factory=ContextSection)
+
+
+class Fact(BaseModel):
+    """Model for a memory fact."""
+
+    id: str = Field(..., description="Unique identifier for the fact")
+    content: str = Field(..., description="Fact content")
+    category: str = Field(default="context", description="Fact category")
+    confidence: float = Field(default=0.5, description="Confidence score (0-1)")
+    createdAt: str = Field(default="", description="Creation timestamp")
+    source: str = Field(default="unknown", description="Source thread ID")
+    sourceError: str | None = Field(default=None, description="Optional description of the prior mistake or wrong approach")
+
+
+class MemoryResponse(BaseModel):
+    """Response model for memory data."""
+
+    version: str = Field(default="1.0", description="Memory schema version")
+    lastUpdated: str = Field(default="", description="Last update timestamp")
+    user: UserContext = Field(default_factory=UserContext)
+    history: HistoryContext = Field(default_factory=HistoryContext)
+    facts: list[Fact] = Field(default_factory=list)
+
+
+def _map_memory_fact_value_error(exc: ValueError) -> HTTPException:
+    """Convert updater validation errors into stable API responses."""
+    if exc.args and exc.args[0] == "confidence":
+        detail = "Invalid confidence value; must be between 0 and 1."
+    else:
+        detail = "Memory fact content cannot be empty."
+    return HTTPException(status_code=400, detail=detail)
+
+
+class FactCreateRequest(BaseModel):
+    """Request model for creating a memory fact."""
+
+    content: str = Field(..., min_length=1, description="Fact content")
+    category: str = Field(default="context", description="Fact category")
+    confidence: float = Field(default=0.5, ge=0.0, le=1.0, description="Confidence score (0-1)")
+
+
+class FactPatchRequest(BaseModel):
+    """PATCH request model that preserves existing values for omitted fields."""
+
+    content: str | None = Field(default=None, min_length=1, description="Fact content")
+    category: str | None = Field(default=None, description="Fact category")
+    confidence: float | None = Field(default=None, ge=0.0, le=1.0, description="Confidence score (0-1)")
+
+
+class MemoryConfigResponse(BaseModel):
+    """Response model for memory configuration."""
+
+    enabled: bool = Field(..., description="Whether memory is enabled")
+    storage_path: str = Field(..., description="Path to memory storage file")
+    debounce_seconds: int = Field(..., description="Debounce time for memory updates")
+    max_facts: int = Field(..., description="Maximum number of facts to store")
+    fact_confidence_threshold: float = Field(..., description="Minimum confidence threshold for facts")
+    injection_enabled: bool = Field(..., description="Whether memory injection is enabled")
+    max_injection_tokens: int = Field(..., description="Maximum tokens for memory injection")
+
+
+class MemoryStatusResponse(BaseModel):
+    """Response model for memory status."""
+
+    config: MemoryConfigResponse
+    data: MemoryResponse
+
+
+@router.get(
+    "/memory",
+    response_model=MemoryResponse,
+    response_model_exclude_none=True,
+    summary="Get Memory Data",
+    description="Retrieve the current global memory data including user context, history, and facts.",
+)
+async def get_memory() -> MemoryResponse:
+    """Get the current global memory data.
+
+    Returns:
+        The current memory data with user context, history, and facts.
+
+    Example Response:
+        ```json
+        {
+            "version": "1.0",
+            "lastUpdated": "2024-01-15T10:30:00Z",
+            "user": {
+                "workContext": {"summary": "Working on DeerFlow project", "updatedAt": "..."},
+                "personalContext": {"summary": "Prefers concise responses", "updatedAt": "..."},
+                "topOfMind": {"summary": "Building memory API", "updatedAt": "..."}
+            },
+            "history": {
+                "recentMonths": {"summary": "Recent development activities", "updatedAt": "..."},
+                "earlierContext": {"summary": "", "updatedAt": ""},
+                "longTermBackground": {"summary": "", "updatedAt": ""}
+            },
+            "facts": [
+                {
+                    "id": "fact_abc123",
+                    "content": "User prefers TypeScript over JavaScript",
+                    "category": "preference",
+                    "confidence": 0.9,
+                    "createdAt": "2024-01-15T10:30:00Z",
+                    "source": "thread_xyz"
+                }
+            ]
+        }
+        ```
+    """
+    memory_data = get_memory_data()
+    return MemoryResponse(**memory_data)
+
+
+@router.post(
+    "/memory/reload",
+    response_model=MemoryResponse,
+    response_model_exclude_none=True,
+    summary="Reload Memory Data",
+    description="Reload memory data from the storage file, refreshing the in-memory cache.",
+)
+async def reload_memory() -> MemoryResponse:
+    """Reload memory data from file.
+
+    This forces a reload of the memory data from the storage file,
+    useful when the file has been modified externally.
+
+    Returns:
+        The reloaded memory data.
+    """
+    memory_data = reload_memory_data()
+    return MemoryResponse(**memory_data)
+
+
+@router.delete(
+    "/memory",
+    response_model=MemoryResponse,
+    response_model_exclude_none=True,
+    summary="Clear All Memory Data",
+    description="Delete all saved memory data and reset the memory structure to an empty state.",
+)
+async def clear_memory() -> MemoryResponse:
+    """Clear all persisted memory data."""
+    try:
+        memory_data = clear_memory_data()
+    except OSError as exc:
+        raise HTTPException(status_code=500, detail="Failed to clear memory data.") from exc
+
+    return MemoryResponse(**memory_data)
+
+
+@router.post(
+    "/memory/facts",
+    response_model=MemoryResponse,
+    response_model_exclude_none=True,
+    summary="Create Memory Fact",
+    description="Create a single saved memory fact manually.",
+)
+async def create_memory_fact_endpoint(request: FactCreateRequest) -> MemoryResponse:
+    """Create a single fact manually."""
+    try:
+        memory_data = create_memory_fact(
+            content=request.content,
+            category=request.category,
+            confidence=request.confidence,
+        )
+    except ValueError as exc:
+        raise _map_memory_fact_value_error(exc) from exc
+    except OSError as exc:
+        raise HTTPException(status_code=500, detail="Failed to create memory fact.") from exc
+
+    return MemoryResponse(**memory_data)
+
+
+@router.delete(
+    "/memory/facts/{fact_id}",
+    response_model=MemoryResponse,
+    response_model_exclude_none=True,
+    summary="Delete Memory Fact",
+    description="Delete a single saved memory fact by its fact id.",
+)
+async def delete_memory_fact_endpoint(fact_id: str) -> MemoryResponse:
+    """Delete a single fact from memory by fact id."""
+    try:
+        memory_data = delete_memory_fact(fact_id)
+    except KeyError as exc:
+        raise HTTPException(status_code=404, detail=f"Memory fact '{fact_id}' not found.") from exc
+    except OSError as exc:
+        raise HTTPException(status_code=500, detail="Failed to delete memory fact.") from exc
+
+    return MemoryResponse(**memory_data)
+
+
+@router.patch(
+    "/memory/facts/{fact_id}",
+    response_model=MemoryResponse,
+    response_model_exclude_none=True,
+    summary="Patch Memory Fact",
+    description="Partially update a single saved memory fact by its fact id while preserving omitted fields.",
+)
+async def update_memory_fact_endpoint(fact_id: str, request: FactPatchRequest) -> MemoryResponse:
+    """Partially update a single fact manually."""
+    try:
+        memory_data = update_memory_fact(
+            fact_id=fact_id,
+            content=request.content,
+            category=request.category,
+            confidence=request.confidence,
+        )
+    except ValueError as exc:
+        raise _map_memory_fact_value_error(exc) from exc
+    except KeyError as exc:
+        raise HTTPException(status_code=404, detail=f"Memory fact '{fact_id}' not found.") from exc
+    except OSError as exc:
+        raise HTTPException(status_code=500, detail="Failed to update memory fact.") from exc
+
+    return MemoryResponse(**memory_data)
+
+
+@router.get(
+    "/memory/export",
+    response_model=MemoryResponse,
+    response_model_exclude_none=True,
+    summary="Export Memory Data",
+    description="Export the current global memory data as JSON for backup or transfer.",
+)
+async def export_memory() -> MemoryResponse:
+    """Export the current memory data."""
+    memory_data = get_memory_data()
+    return MemoryResponse(**memory_data)
+
+
+@router.post(
+    "/memory/import",
+    response_model=MemoryResponse,
+    response_model_exclude_none=True,
+    summary="Import Memory Data",
+    description="Import and overwrite the current global memory data from a JSON payload.",
+)
+async def import_memory(request: MemoryResponse) -> MemoryResponse:
+    """Import and persist memory data."""
+    try:
+        memory_data = import_memory_data(request.model_dump())
+    except OSError as exc:
+        raise HTTPException(status_code=500, detail="Failed to import memory data.") from exc
+
+    return MemoryResponse(**memory_data)
+
+
+@router.get(
+    "/memory/config",
+    response_model=MemoryConfigResponse,
+    summary="Get Memory Configuration",
+    description="Retrieve the current memory system configuration.",
+)
+async def get_memory_config_endpoint() -> MemoryConfigResponse:
+    """Get the memory system configuration.
+
+    Returns:
+        The current memory configuration settings.
+
+    Example Response:
+        ```json
+        {
+            "enabled": true,
+            "storage_path": ".deer-flow/memory.json",
+            "debounce_seconds": 30,
+            "max_facts": 100,
+            "fact_confidence_threshold": 0.7,
+            "injection_enabled": true,
+            "max_injection_tokens": 2000
+        }
+        ```
+    """
+    config = get_memory_config()
+    return MemoryConfigResponse(
+        enabled=config.enabled,
+        storage_path=config.storage_path,
+        debounce_seconds=config.debounce_seconds,
+        max_facts=config.max_facts,
+        fact_confidence_threshold=config.fact_confidence_threshold,
+        injection_enabled=config.injection_enabled,
+        max_injection_tokens=config.max_injection_tokens,
+    )
+
+
+@router.get(
+    "/memory/status",
+    response_model=MemoryStatusResponse,
+    response_model_exclude_none=True,
+    summary="Get Memory Status",
+    description="Retrieve both memory configuration and current data in a single request.",
+)
+async def get_memory_status() -> MemoryStatusResponse:
+    """Get the memory system status including configuration and data.
+
+    Returns:
+        Combined memory configuration and current data.
+    """
+    config = get_memory_config()
+    memory_data = get_memory_data()
+
+    return MemoryStatusResponse(
+        config=MemoryConfigResponse(
+            enabled=config.enabled,
+            storage_path=config.storage_path,
+            debounce_seconds=config.debounce_seconds,
+            max_facts=config.max_facts,
+            fact_confidence_threshold=config.fact_confidence_threshold,
+            injection_enabled=config.injection_enabled,
+            max_injection_tokens=config.max_injection_tokens,
+        ),
+        data=MemoryResponse(**memory_data),
+    )

backend/app/gateway/routers/models.py

@@ -0,0 +1,116 @@
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel, Field
+
+from deerflow.config import get_app_config
+
+router = APIRouter(prefix="/api", tags=["models"])
+
+
+class ModelResponse(BaseModel):
+    """Response model for model information."""
+
+    name: str = Field(..., description="Unique identifier for the model")
+    model: str = Field(..., description="Actual provider model identifier")
+    display_name: str | None = Field(None, description="Human-readable name")
+    description: str | None = Field(None, description="Model description")
+    supports_thinking: bool = Field(default=False, description="Whether model supports thinking mode")
+    supports_reasoning_effort: bool = Field(default=False, description="Whether model supports reasoning effort")
+
+
+class ModelsListResponse(BaseModel):
+    """Response model for listing all models."""
+
+    models: list[ModelResponse]
+
+
+@router.get(
+    "/models",
+    response_model=ModelsListResponse,
+    summary="List All Models",
+    description="Retrieve a list of all available AI models configured in the system.",
+)
+async def list_models() -> ModelsListResponse:
+    """List all available models from configuration.
+
+    Returns model information suitable for frontend display,
+    excluding sensitive fields like API keys and internal configuration.
+
+    Returns:
+        A list of all configured models with their metadata.
+
+    Example Response:
+        ```json
+        {
+            "models": [
+                {
+                    "name": "gpt-4",
+                    "display_name": "GPT-4",
+                    "description": "OpenAI GPT-4 model",
+                    "supports_thinking": false
+                },
+                {
+                    "name": "claude-3-opus",
+                    "display_name": "Claude 3 Opus",
+                    "description": "Anthropic Claude 3 Opus model",
+                    "supports_thinking": true
+                }
+            ]
+        }
+        ```
+    """
+    config = get_app_config()
+    models = [
+        ModelResponse(
+            name=model.name,
+            model=model.model,
+            display_name=model.display_name,
+            description=model.description,
+            supports_thinking=model.supports_thinking,
+            supports_reasoning_effort=model.supports_reasoning_effort,
+        )
+        for model in config.models
+    ]
+    return ModelsListResponse(models=models)
+
+
+@router.get(
+    "/models/{model_name}",
+    response_model=ModelResponse,
+    summary="Get Model Details",
+    description="Retrieve detailed information about a specific AI model by its name.",
+)
+async def get_model(model_name: str) -> ModelResponse:
+    """Get a specific model by name.
+
+    Args:
+        model_name: The unique name of the model to retrieve.
+
+    Returns:
+        Model information if found.
+
+    Raises:
+        HTTPException: 404 if model not found.
+
+    Example Response:
+        ```json
+        {
+            "name": "gpt-4",
+            "display_name": "GPT-4",
+            "description": "OpenAI GPT-4 model",
+            "supports_thinking": false
+        }
+        ```
+    """
+    config = get_app_config()
+    model = config.get_model_config(model_name)
+    if model is None:
+        raise HTTPException(status_code=404, detail=f"Model '{model_name}' not found")
+
+    return ModelResponse(
+        name=model.name,
+        model=model.model,
+        display_name=model.display_name,
+        description=model.description,
+        supports_thinking=model.supports_thinking,
+        supports_reasoning_effort=model.supports_reasoning_effort,
+    )

backend/app/gateway/routers/runs.py

@@ -0,0 +1,87 @@
+"""Stateless runs endpoints -- stream and wait without a pre-existing thread.
+
+These endpoints auto-create a temporary thread when no ``thread_id`` is
+supplied in the request body.  When a ``thread_id`` **is** provided, it
+is reused so that conversation history is preserved across calls.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import logging
+import uuid
+
+from fastapi import APIRouter, Request
+from fastapi.responses import StreamingResponse
+
+from app.gateway.deps import get_checkpointer, get_run_manager, get_stream_bridge
+from app.gateway.routers.thread_runs import RunCreateRequest
+from app.gateway.services import sse_consumer, start_run
+from deerflow.runtime import serialize_channel_values
+
+logger = logging.getLogger(__name__)
+router = APIRouter(prefix="/api/runs", tags=["runs"])
+
+
+def _resolve_thread_id(body: RunCreateRequest) -> str:
+    """Return the thread_id from the request body, or generate a new one."""
+    thread_id = (body.config or {}).get("configurable", {}).get("thread_id")
+    if thread_id:
+        return str(thread_id)
+    return str(uuid.uuid4())
+
+
+@router.post("/stream")
+async def stateless_stream(body: RunCreateRequest, request: Request) -> StreamingResponse:
+    """Create a run and stream events via SSE.
+
+    If ``config.configurable.thread_id`` is provided, the run is created
+    on the given thread so that conversation history is preserved.
+    Otherwise a new temporary thread is created.
+    """
+    thread_id = _resolve_thread_id(body)
+    bridge = get_stream_bridge(request)
+    run_mgr = get_run_manager(request)
+    record = await start_run(body, thread_id, request)
+
+    return StreamingResponse(
+        sse_consumer(bridge, record, request, run_mgr),
+        media_type="text/event-stream",
+        headers={
+            "Cache-Control": "no-cache",
+            "Connection": "keep-alive",
+            "X-Accel-Buffering": "no",
+            "Content-Location": f"/api/threads/{thread_id}/runs/{record.run_id}",
+        },
+    )
+
+
+@router.post("/wait", response_model=dict)
+async def stateless_wait(body: RunCreateRequest, request: Request) -> dict:
+    """Create a run and block until completion.
+
+    If ``config.configurable.thread_id`` is provided, the run is created
+    on the given thread so that conversation history is preserved.
+    Otherwise a new temporary thread is created.
+    """
+    thread_id = _resolve_thread_id(body)
+    record = await start_run(body, thread_id, request)
+
+    if record.task is not None:
+        try:
+            await record.task
+        except asyncio.CancelledError:
+            pass
+
+    checkpointer = get_checkpointer(request)
+    config = {"configurable": {"thread_id": thread_id}}
+    try:
+        checkpoint_tuple = await checkpointer.aget_tuple(config)
+        if checkpoint_tuple is not None:
+            checkpoint = getattr(checkpoint_tuple, "checkpoint", {}) or {}
+            channel_values = checkpoint.get("channel_values", {})
+            return serialize_channel_values(channel_values)
+    except Exception:
+        logger.exception("Failed to fetch final state for run %s", record.run_id)
+
+    return {"status": record.status.value, "error": record.error}

backend/app/gateway/routers/skills.py

@@ -0,0 +1,354 @@
+import json
+import logging
+import shutil
+from pathlib import Path
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel, Field
+
+from app.gateway.path_utils import resolve_thread_virtual_path
+from deerflow.agents.lead_agent.prompt import clear_skills_system_prompt_cache
+from deerflow.config.extensions_config import ExtensionsConfig, SkillStateConfig, get_extensions_config, reload_extensions_config
+from deerflow.skills import Skill, load_skills
+from deerflow.skills.installer import SkillAlreadyExistsError, install_skill_from_archive
+from deerflow.skills.manager import (
+    append_history,
+    atomic_write,
+    custom_skill_exists,
+    ensure_custom_skill_is_editable,
+    get_custom_skill_dir,
+    get_custom_skill_file,
+    get_skill_history_file,
+    read_custom_skill_content,
+    read_history,
+    validate_skill_markdown_content,
+)
+from deerflow.skills.security_scanner import scan_skill_content
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/api", tags=["skills"])
+
+
+class SkillResponse(BaseModel):
+    """Response model for skill information."""
+
+    name: str = Field(..., description="Name of the skill")
+    description: str = Field(..., description="Description of what the skill does")
+    license: str | None = Field(None, description="License information")
+    category: str = Field(..., description="Category of the skill (public or custom)")
+    enabled: bool = Field(default=True, description="Whether this skill is enabled")
+
+
+class SkillsListResponse(BaseModel):
+    """Response model for listing all skills."""
+
+    skills: list[SkillResponse]
+
+
+class SkillUpdateRequest(BaseModel):
+    """Request model for updating a skill."""
+
+    enabled: bool = Field(..., description="Whether to enable or disable the skill")
+
+
+class SkillInstallRequest(BaseModel):
+    """Request model for installing a skill from a .skill file."""
+
+    thread_id: str = Field(..., description="The thread ID where the .skill file is located")
+    path: str = Field(..., description="Virtual path to the .skill file (e.g., mnt/user-data/outputs/my-skill.skill)")
+
+
+class SkillInstallResponse(BaseModel):
+    """Response model for skill installation."""
+
+    success: bool = Field(..., description="Whether the installation was successful")
+    skill_name: str = Field(..., description="Name of the installed skill")
+    message: str = Field(..., description="Installation result message")
+
+
+class CustomSkillContentResponse(SkillResponse):
+    content: str = Field(..., description="Raw SKILL.md content")
+
+
+class CustomSkillUpdateRequest(BaseModel):
+    content: str = Field(..., description="Replacement SKILL.md content")
+
+
+class CustomSkillHistoryResponse(BaseModel):
+    history: list[dict]
+
+
+class SkillRollbackRequest(BaseModel):
+    history_index: int = Field(default=-1, description="History entry index to restore from, defaulting to the latest change.")
+
+
+def _skill_to_response(skill: Skill) -> SkillResponse:
+    """Convert a Skill object to a SkillResponse."""
+    return SkillResponse(
+        name=skill.name,
+        description=skill.description,
+        license=skill.license,
+        category=skill.category,
+        enabled=skill.enabled,
+    )
+
+
+@router.get(
+    "/skills",
+    response_model=SkillsListResponse,
+    summary="List All Skills",
+    description="Retrieve a list of all available skills from both public and custom directories.",
+)
+async def list_skills() -> SkillsListResponse:
+    try:
+        skills = load_skills(enabled_only=False)
+        return SkillsListResponse(skills=[_skill_to_response(skill) for skill in skills])
+    except Exception as e:
+        logger.error(f"Failed to load skills: {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to load skills: {str(e)}")
+
+
+@router.post(
+    "/skills/install",
+    response_model=SkillInstallResponse,
+    summary="Install Skill",
+    description="Install a skill from a .skill file (ZIP archive) located in the thread's user-data directory.",
+)
+async def install_skill(request: SkillInstallRequest) -> SkillInstallResponse:
+    try:
+        skill_file_path = resolve_thread_virtual_path(request.thread_id, request.path)
+        result = install_skill_from_archive(skill_file_path)
+        return SkillInstallResponse(**result)
+    except FileNotFoundError as e:
+        raise HTTPException(status_code=404, detail=str(e))
+    except SkillAlreadyExistsError as e:
+        raise HTTPException(status_code=409, detail=str(e))
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Failed to install skill: {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to install skill: {str(e)}")
+
+
+@router.get("/skills/custom", response_model=SkillsListResponse, summary="List Custom Skills")
+async def list_custom_skills() -> SkillsListResponse:
+    try:
+        skills = [skill for skill in load_skills(enabled_only=False) if skill.category == "custom"]
+        return SkillsListResponse(skills=[_skill_to_response(skill) for skill in skills])
+    except Exception as e:
+        logger.error("Failed to list custom skills: %s", e, exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to list custom skills: {str(e)}")
+
+
+@router.get("/skills/custom/{skill_name}", response_model=CustomSkillContentResponse, summary="Get Custom Skill Content")
+async def get_custom_skill(skill_name: str) -> CustomSkillContentResponse:
+    try:
+        skills = load_skills(enabled_only=False)
+        skill = next((s for s in skills if s.name == skill_name and s.category == "custom"), None)
+        if skill is None:
+            raise HTTPException(status_code=404, detail=f"Custom skill '{skill_name}' not found")
+        return CustomSkillContentResponse(**_skill_to_response(skill).model_dump(), content=read_custom_skill_content(skill_name))
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error("Failed to get custom skill %s: %s", skill_name, e, exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to get custom skill: {str(e)}")
+
+
+@router.put("/skills/custom/{skill_name}", response_model=CustomSkillContentResponse, summary="Edit Custom Skill")
+async def update_custom_skill(skill_name: str, request: CustomSkillUpdateRequest) -> CustomSkillContentResponse:
+    try:
+        ensure_custom_skill_is_editable(skill_name)
+        validate_skill_markdown_content(skill_name, request.content)
+        scan = await scan_skill_content(request.content, executable=False, location=f"{skill_name}/SKILL.md")
+        if scan.decision == "block":
+            raise HTTPException(status_code=400, detail=f"Security scan blocked the edit: {scan.reason}")
+        skill_file = get_custom_skill_dir(skill_name) / "SKILL.md"
+        prev_content = skill_file.read_text(encoding="utf-8")
+        atomic_write(skill_file, request.content)
+        append_history(
+            skill_name,
+            {
+                "action": "human_edit",
+                "author": "human",
+                "thread_id": None,
+                "file_path": "SKILL.md",
+                "prev_content": prev_content,
+                "new_content": request.content,
+                "scanner": {"decision": scan.decision, "reason": scan.reason},
+            },
+        )
+        clear_skills_system_prompt_cache()
+        return await get_custom_skill(skill_name)
+    except HTTPException:
+        raise
+    except FileNotFoundError as e:
+        raise HTTPException(status_code=404, detail=str(e))
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        logger.error("Failed to update custom skill %s: %s", skill_name, e, exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to update custom skill: {str(e)}")
+
+
+@router.delete("/skills/custom/{skill_name}", summary="Delete Custom Skill")
+async def delete_custom_skill(skill_name: str) -> dict[str, bool]:
+    try:
+        ensure_custom_skill_is_editable(skill_name)
+        skill_dir = get_custom_skill_dir(skill_name)
+        prev_content = read_custom_skill_content(skill_name)
+        append_history(
+            skill_name,
+            {
+                "action": "human_delete",
+                "author": "human",
+                "thread_id": None,
+                "file_path": "SKILL.md",
+                "prev_content": prev_content,
+                "new_content": None,
+                "scanner": {"decision": "allow", "reason": "Deletion requested."},
+            },
+        )
+        shutil.rmtree(skill_dir)
+        clear_skills_system_prompt_cache()
+        return {"success": True}
+    except FileNotFoundError as e:
+        raise HTTPException(status_code=404, detail=str(e))
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        logger.error("Failed to delete custom skill %s: %s", skill_name, e, exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to delete custom skill: {str(e)}")
+
+
+@router.get("/skills/custom/{skill_name}/history", response_model=CustomSkillHistoryResponse, summary="Get Custom Skill History")
+async def get_custom_skill_history(skill_name: str) -> CustomSkillHistoryResponse:
+    try:
+        if not custom_skill_exists(skill_name) and not get_skill_history_file(skill_name).exists():
+            raise HTTPException(status_code=404, detail=f"Custom skill '{skill_name}' not found")
+        return CustomSkillHistoryResponse(history=read_history(skill_name))
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error("Failed to read history for %s: %s", skill_name, e, exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to read history: {str(e)}")
+
+
+@router.post("/skills/custom/{skill_name}/rollback", response_model=CustomSkillContentResponse, summary="Rollback Custom Skill")
+async def rollback_custom_skill(skill_name: str, request: SkillRollbackRequest) -> CustomSkillContentResponse:
+    try:
+        if not custom_skill_exists(skill_name) and not get_skill_history_file(skill_name).exists():
+            raise HTTPException(status_code=404, detail=f"Custom skill '{skill_name}' not found")
+        history = read_history(skill_name)
+        if not history:
+            raise HTTPException(status_code=400, detail=f"Custom skill '{skill_name}' has no history")
+        record = history[request.history_index]
+        target_content = record.get("prev_content")
+        if target_content is None:
+            raise HTTPException(status_code=400, detail="Selected history entry has no previous content to roll back to")
+        validate_skill_markdown_content(skill_name, target_content)
+        scan = await scan_skill_content(target_content, executable=False, location=f"{skill_name}/SKILL.md")
+        skill_file = get_custom_skill_file(skill_name)
+        current_content = skill_file.read_text(encoding="utf-8") if skill_file.exists() else None
+        history_entry = {
+            "action": "rollback",
+            "author": "human",
+            "thread_id": None,
+            "file_path": "SKILL.md",
+            "prev_content": current_content,
+            "new_content": target_content,
+            "rollback_from_ts": record.get("ts"),
+            "scanner": {"decision": scan.decision, "reason": scan.reason},
+        }
+        if scan.decision == "block":
+            append_history(skill_name, history_entry)
+            raise HTTPException(status_code=400, detail=f"Rollback blocked by security scanner: {scan.reason}")
+        atomic_write(skill_file, target_content)
+        append_history(skill_name, history_entry)
+        clear_skills_system_prompt_cache()
+        return await get_custom_skill(skill_name)
+    except HTTPException:
+        raise
+    except IndexError:
+        raise HTTPException(status_code=400, detail="history_index is out of range")
+    except FileNotFoundError as e:
+        raise HTTPException(status_code=404, detail=str(e))
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        logger.error("Failed to roll back custom skill %s: %s", skill_name, e, exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to roll back custom skill: {str(e)}")
+
+
+@router.get(
+    "/skills/{skill_name}",
+    response_model=SkillResponse,
+    summary="Get Skill Details",
+    description="Retrieve detailed information about a specific skill by its name.",
+)
+async def get_skill(skill_name: str) -> SkillResponse:
+    try:
+        skills = load_skills(enabled_only=False)
+        skill = next((s for s in skills if s.name == skill_name), None)
+
+        if skill is None:
+            raise HTTPException(status_code=404, detail=f"Skill '{skill_name}' not found")
+
+        return _skill_to_response(skill)
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Failed to get skill {skill_name}: {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to get skill: {str(e)}")
+
+
+@router.put(
+    "/skills/{skill_name}",
+    response_model=SkillResponse,
+    summary="Update Skill",
+    description="Update a skill's enabled status by modifying the extensions_config.json file.",
+)
+async def update_skill(skill_name: str, request: SkillUpdateRequest) -> SkillResponse:
+    try:
+        skills = load_skills(enabled_only=False)
+        skill = next((s for s in skills if s.name == skill_name), None)
+
+        if skill is None:
+            raise HTTPException(status_code=404, detail=f"Skill '{skill_name}' not found")
+
+        config_path = ExtensionsConfig.resolve_config_path()
+        if config_path is None:
+            config_path = Path.cwd().parent / "extensions_config.json"
+            logger.info(f"No existing extensions config found. Creating new config at: {config_path}")
+
+        extensions_config = get_extensions_config()
+        extensions_config.skills[skill_name] = SkillStateConfig(enabled=request.enabled)
+
+        config_data = {
+            "mcpServers": {name: server.model_dump() for name, server in extensions_config.mcp_servers.items()},
+            "skills": {name: {"enabled": skill_config.enabled} for name, skill_config in extensions_config.skills.items()},
+        }
+
+        with open(config_path, "w", encoding="utf-8") as f:
+            json.dump(config_data, f, indent=2)
+
+        logger.info(f"Skills configuration updated and saved to: {config_path}")
+        reload_extensions_config()
+
+        skills = load_skills(enabled_only=False)
+        updated_skill = next((s for s in skills if s.name == skill_name), None)
+
+        if updated_skill is None:
+            raise HTTPException(status_code=500, detail=f"Failed to reload skill '{skill_name}' after update")
+
+        logger.info(f"Skill '{skill_name}' enabled status updated to {request.enabled}")
+        return _skill_to_response(updated_skill)
+
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Failed to update skill {skill_name}: {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Failed to update skill: {str(e)}")

backend/app/gateway/routers/suggestions.py

@@ -0,0 +1,134 @@
+import json
+import logging
+
+from fastapi import APIRouter, Request
+from langchain_core.messages import HumanMessage, SystemMessage
+from pydantic import BaseModel, Field
+
+from app.gateway.authz import require_permission
+from deerflow.models import create_chat_model
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/api", tags=["suggestions"])
+
+
+class SuggestionMessage(BaseModel):
+    role: str = Field(..., description="Message role: user|assistant")
+    content: str = Field(..., description="Message content as plain text")
+
+
+class SuggestionsRequest(BaseModel):
+    messages: list[SuggestionMessage] = Field(..., description="Recent conversation messages")
+    n: int = Field(default=3, ge=1, le=5, description="Number of suggestions to generate")
+    model_name: str | None = Field(default=None, description="Optional model override")
+
+
+class SuggestionsResponse(BaseModel):
+    suggestions: list[str] = Field(default_factory=list, description="Suggested follow-up questions")
+
+
+def _strip_markdown_code_fence(text: str) -> str:
+    stripped = text.strip()
+    if not stripped.startswith("```"):
+        return stripped
+    lines = stripped.splitlines()
+    if len(lines) >= 3 and lines[0].startswith("```") and lines[-1].startswith("```"):
+        return "\n".join(lines[1:-1]).strip()
+    return stripped
+
+
+def _parse_json_string_list(text: str) -> list[str] | None:
+    candidate = _strip_markdown_code_fence(text)
+    start = candidate.find("[")
+    end = candidate.rfind("]")
+    if start == -1 or end == -1 or end <= start:
+        return None
+    candidate = candidate[start : end + 1]
+    try:
+        data = json.loads(candidate)
+    except Exception:
+        return None
+    if not isinstance(data, list):
+        return None
+    out: list[str] = []
+    for item in data:
+        if not isinstance(item, str):
+            continue
+        s = item.strip()
+        if not s:
+            continue
+        out.append(s)
+    return out
+
+
+def _extract_response_text(content: object) -> str:
+    if isinstance(content, str):
+        return content
+    if isinstance(content, list):
+        parts: list[str] = []
+        for block in content:
+            if isinstance(block, str):
+                parts.append(block)
+            elif isinstance(block, dict) and block.get("type") in {"text", "output_text"}:
+                text = block.get("text")
+                if isinstance(text, str):
+                    parts.append(text)
+        return "\n".join(parts) if parts else ""
+    if content is None:
+        return ""
+    return str(content)
+
+
+def _format_conversation(messages: list[SuggestionMessage]) -> str:
+    parts: list[str] = []
+    for m in messages:
+        role = m.role.strip().lower()
+        if role in ("user", "human"):
+            parts.append(f"User: {m.content.strip()}")
+        elif role in ("assistant", "ai"):
+            parts.append(f"Assistant: {m.content.strip()}")
+        else:
+            parts.append(f"{m.role}: {m.content.strip()}")
+    return "\n".join(parts).strip()
+
+
+@router.post(
+    "/threads/{thread_id}/suggestions",
+    response_model=SuggestionsResponse,
+    summary="Generate Follow-up Questions",
+    description="Generate short follow-up questions a user might ask next, based on recent conversation context.",
+)
+@require_permission("threads", "read", owner_check=True)
+async def generate_suggestions(thread_id: str, body: SuggestionsRequest, request: Request) -> SuggestionsResponse:
+    if not body.messages:
+        return SuggestionsResponse(suggestions=[])
+
+    n = body.n
+    conversation = _format_conversation(body.messages)
+    if not conversation:
+        return SuggestionsResponse(suggestions=[])
+
+    system_instruction = (
+        "You are generating follow-up questions to help the user continue the conversation.\n"
+        f"Based on the conversation below, produce EXACTLY {n} short questions the user might ask next.\n"
+        "Requirements:\n"
+        "- Questions must be relevant to the preceding conversation.\n"
+        "- Questions must be written in the same language as the user.\n"
+        "- Keep each question concise (ideally <= 20 words / <= 40 Chinese characters).\n"
+        "- Do NOT include numbering, markdown, or any extra text.\n"
+        "- Output MUST be a JSON array of strings only.\n"
+    )
+    user_content = f"Conversation Context:\n{conversation}\n\nGenerate {n} follow-up questions"
+
+    try:
+        model = create_chat_model(name=body.model_name, thinking_enabled=False)
+        response = await model.ainvoke([SystemMessage(content=system_instruction), HumanMessage(content=user_content)])
+        raw = _extract_response_text(response.content)
+        suggestions = _parse_json_string_list(raw) or []
+        cleaned = [s.replace("\n", " ").strip() for s in suggestions if s.strip()]
+        cleaned = cleaned[:n]
+        return SuggestionsResponse(suggestions=cleaned)
+    except Exception as exc:
+        logger.exception("Failed to generate suggestions: thread_id=%s err=%s", thread_id, exc)
+        return SuggestionsResponse(suggestions=[])

backend/app/gateway/routers/thread_runs.py

@@ -0,0 +1,328 @@
+"""Runs endpoints — create, stream, wait, cancel.
+
+Implements the LangGraph Platform runs API on top of
+:class:`deerflow.agents.runs.RunManager` and
+:class:`deerflow.agents.stream_bridge.StreamBridge`.
+
+SSE format is aligned with the LangGraph Platform protocol so that
+the ``useStream`` React hook from ``@langchain/langgraph-sdk/react``
+works without modification.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import logging
+from typing import Any, Literal
+
+from fastapi import APIRouter, HTTPException, Query, Request
+from fastapi.responses import Response, StreamingResponse
+from pydantic import BaseModel, Field
+
+from app.gateway.authz import require_permission
+from app.gateway.deps import get_checkpointer, get_run_event_store, get_run_manager, get_run_store, get_stream_bridge
+from app.gateway.services import sse_consumer, start_run
+from deerflow.runtime import RunRecord, serialize_channel_values
+
+logger = logging.getLogger(__name__)
+router = APIRouter(prefix="/api/threads", tags=["runs"])
+
+
+# ---------------------------------------------------------------------------
+# Request / response models
+# ---------------------------------------------------------------------------
+
+
+class RunCreateRequest(BaseModel):
+    assistant_id: str | None = Field(default=None, description="Agent / assistant to use")
+    input: dict[str, Any] | None = Field(default=None, description="Graph input (e.g. {messages: [...]})")
+    command: dict[str, Any] | None = Field(default=None, description="LangGraph Command")
+    metadata: dict[str, Any] | None = Field(default=None, description="Run metadata")
+    config: dict[str, Any] | None = Field(default=None, description="RunnableConfig overrides")
+    context: dict[str, Any] | None = Field(default=None, description="DeerFlow context overrides (model_name, thinking_enabled, etc.)")
+    webhook: str | None = Field(default=None, description="Completion callback URL")
+    checkpoint_id: str | None = Field(default=None, description="Resume from checkpoint")
+    checkpoint: dict[str, Any] | None = Field(default=None, description="Full checkpoint object")
+    interrupt_before: list[str] | Literal["*"] | None = Field(default=None, description="Nodes to interrupt before")
+    interrupt_after: list[str] | Literal["*"] | None = Field(default=None, description="Nodes to interrupt after")
+    stream_mode: list[str] | str | None = Field(default=None, description="Stream mode(s)")
+    stream_subgraphs: bool = Field(default=False, description="Include subgraph events")
+    stream_resumable: bool | None = Field(default=None, description="SSE resumable mode")
+    on_disconnect: Literal["cancel", "continue"] = Field(default="cancel", description="Behaviour on SSE disconnect")
+    on_completion: Literal["delete", "keep"] = Field(default="keep", description="Delete temp thread on completion")
+    multitask_strategy: Literal["reject", "rollback", "interrupt", "enqueue"] = Field(default="reject", description="Concurrency strategy")
+    after_seconds: float | None = Field(default=None, description="Delayed execution")
+    if_not_exists: Literal["reject", "create"] = Field(default="create", description="Thread creation policy")
+    feedback_keys: list[str] | None = Field(default=None, description="LangSmith feedback keys")
+    follow_up_to_run_id: str | None = Field(default=None, description="Run ID this message follows up on. Auto-detected from latest successful run if not provided.")
+
+
+class RunResponse(BaseModel):
+    run_id: str
+    thread_id: str
+    assistant_id: str | None = None
+    status: str
+    metadata: dict[str, Any] = Field(default_factory=dict)
+    kwargs: dict[str, Any] = Field(default_factory=dict)
+    multitask_strategy: str = "reject"
+    created_at: str = ""
+    updated_at: str = ""
+
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+
+def _record_to_response(record: RunRecord) -> RunResponse:
+    return RunResponse(
+        run_id=record.run_id,
+        thread_id=record.thread_id,
+        assistant_id=record.assistant_id,
+        status=record.status.value,
+        metadata=record.metadata,
+        kwargs=record.kwargs,
+        multitask_strategy=record.multitask_strategy,
+        created_at=record.created_at,
+        updated_at=record.updated_at,
+    )
+
+
+# ---------------------------------------------------------------------------
+# Endpoints
+# ---------------------------------------------------------------------------
+
+
+@router.post("/{thread_id}/runs", response_model=RunResponse)
+@require_permission("runs", "create", owner_check=True)
+async def create_run(thread_id: str, body: RunCreateRequest, request: Request) -> RunResponse:
+    """Create a background run (returns immediately)."""
+    record = await start_run(body, thread_id, request)
+    return _record_to_response(record)
+
+
+@router.post("/{thread_id}/runs/stream")
+@require_permission("runs", "create", owner_check=True)
+async def stream_run(thread_id: str, body: RunCreateRequest, request: Request) -> StreamingResponse:
+    """Create a run and stream events via SSE.
+
+    The response includes a ``Content-Location`` header with the run's
+    resource URL, matching the LangGraph Platform protocol.  The
+    ``useStream`` React hook uses this to extract run metadata.
+    """
+    bridge = get_stream_bridge(request)
+    run_mgr = get_run_manager(request)
+    record = await start_run(body, thread_id, request)
+
+    return StreamingResponse(
+        sse_consumer(bridge, record, request, run_mgr),
+        media_type="text/event-stream",
+        headers={
+            "Cache-Control": "no-cache",
+            "Connection": "keep-alive",
+            "X-Accel-Buffering": "no",
+            # LangGraph Platform includes run metadata in this header.
+            # The SDK uses a greedy regex to extract the run id from this path,
+            # so it must point at the canonical run resource without extra suffixes.
+            "Content-Location": f"/api/threads/{thread_id}/runs/{record.run_id}",
+        },
+    )
+
+
+@router.post("/{thread_id}/runs/wait", response_model=dict)
+@require_permission("runs", "create", owner_check=True)
+async def wait_run(thread_id: str, body: RunCreateRequest, request: Request) -> dict:
+    """Create a run and block until it completes, returning the final state."""
+    record = await start_run(body, thread_id, request)
+
+    if record.task is not None:
+        try:
+            await record.task
+        except asyncio.CancelledError:
+            pass
+
+    checkpointer = get_checkpointer(request)
+    config = {"configurable": {"thread_id": thread_id}}
+    try:
+        checkpoint_tuple = await checkpointer.aget_tuple(config)
+        if checkpoint_tuple is not None:
+            checkpoint = getattr(checkpoint_tuple, "checkpoint", {}) or {}
+            channel_values = checkpoint.get("channel_values", {})
+            return serialize_channel_values(channel_values)
+    except Exception:
+        logger.exception("Failed to fetch final state for run %s", record.run_id)
+
+    return {"status": record.status.value, "error": record.error}
+
+
+@router.get("/{thread_id}/runs", response_model=list[RunResponse])
+@require_permission("runs", "read", owner_check=True)
+async def list_runs(thread_id: str, request: Request) -> list[RunResponse]:
+    """List all runs for a thread."""
+    run_mgr = get_run_manager(request)
+    records = await run_mgr.list_by_thread(thread_id)
+    return [_record_to_response(r) for r in records]
+
+
+@router.get("/{thread_id}/runs/{run_id}", response_model=RunResponse)
+@require_permission("runs", "read", owner_check=True)
+async def get_run(thread_id: str, run_id: str, request: Request) -> RunResponse:
+    """Get details of a specific run."""
+    run_mgr = get_run_manager(request)
+    record = run_mgr.get(run_id)
+    if record is None or record.thread_id != thread_id:
+        raise HTTPException(status_code=404, detail=f"Run {run_id} not found")
+    return _record_to_response(record)
+
+
+@router.post("/{thread_id}/runs/{run_id}/cancel")
+@require_permission("runs", "cancel", owner_check=True)
+async def cancel_run(
+    thread_id: str,
+    run_id: str,
+    request: Request,
+    wait: bool = Query(default=False, description="Block until run completes after cancel"),
+    action: Literal["interrupt", "rollback"] = Query(default="interrupt", description="Cancel action"),
+) -> Response:
+    """Cancel a running or pending run.
+
+    - action=interrupt: Stop execution, keep current checkpoint (can be resumed)
+    - action=rollback: Stop execution, revert to pre-run checkpoint state
+    - wait=true: Block until the run fully stops, return 204
+    - wait=false: Return immediately with 202
+    """
+    run_mgr = get_run_manager(request)
+    record = run_mgr.get(run_id)
+    if record is None or record.thread_id != thread_id:
+        raise HTTPException(status_code=404, detail=f"Run {run_id} not found")
+
+    cancelled = await run_mgr.cancel(run_id, action=action)
+    if not cancelled:
+        raise HTTPException(
+            status_code=409,
+            detail=f"Run {run_id} is not cancellable (status: {record.status.value})",
+        )
+
+    if wait and record.task is not None:
+        try:
+            await record.task
+        except asyncio.CancelledError:
+            pass
+        return Response(status_code=204)
+
+    return Response(status_code=202)
+
+
+@router.get("/{thread_id}/runs/{run_id}/join")
+@require_permission("runs", "read", owner_check=True)
+async def join_run(thread_id: str, run_id: str, request: Request) -> StreamingResponse:
+    """Join an existing run's SSE stream."""
+    bridge = get_stream_bridge(request)
+    run_mgr = get_run_manager(request)
+    record = run_mgr.get(run_id)
+    if record is None or record.thread_id != thread_id:
+        raise HTTPException(status_code=404, detail=f"Run {run_id} not found")
+
+    return StreamingResponse(
+        sse_consumer(bridge, record, request, run_mgr),
+        media_type="text/event-stream",
+        headers={
+            "Cache-Control": "no-cache",
+            "Connection": "keep-alive",
+            "X-Accel-Buffering": "no",
+        },
+    )
+
+
+@router.api_route("/{thread_id}/runs/{run_id}/stream", methods=["GET", "POST"], response_model=None)
+@require_permission("runs", "read", owner_check=True)
+async def stream_existing_run(
+    thread_id: str,
+    run_id: str,
+    request: Request,
+    action: Literal["interrupt", "rollback"] | None = Query(default=None, description="Cancel action"),
+    wait: int = Query(default=0, description="Block until cancelled (1) or return immediately (0)"),
+):
+    """Join an existing run's SSE stream (GET), or cancel-then-stream (POST).
+
+    The LangGraph SDK's ``joinStream`` and ``useStream`` stop button both use
+    ``POST`` to this endpoint.  When ``action=interrupt`` or ``action=rollback``
+    is present the run is cancelled first; the response then streams any
+    remaining buffered events so the client observes a clean shutdown.
+    """
+    run_mgr = get_run_manager(request)
+    record = run_mgr.get(run_id)
+    if record is None or record.thread_id != thread_id:
+        raise HTTPException(status_code=404, detail=f"Run {run_id} not found")
+
+    # Cancel if an action was requested (stop-button / interrupt flow)
+    if action is not None:
+        cancelled = await run_mgr.cancel(run_id, action=action)
+        if cancelled and wait and record.task is not None:
+            try:
+                await record.task
+            except (asyncio.CancelledError, Exception):
+                pass
+            return Response(status_code=204)
+
+    bridge = get_stream_bridge(request)
+    return StreamingResponse(
+        sse_consumer(bridge, record, request, run_mgr),
+        media_type="text/event-stream",
+        headers={
+            "Cache-Control": "no-cache",
+            "Connection": "keep-alive",
+            "X-Accel-Buffering": "no",
+        },
+    )
+
+
+# ---------------------------------------------------------------------------
+# Messages / Events / Token usage endpoints
+# ---------------------------------------------------------------------------
+
+
+@router.get("/{thread_id}/messages")
+@require_permission("runs", "read", owner_check=True)
+async def list_thread_messages(
+    thread_id: str,
+    request: Request,
+    limit: int = Query(default=50, le=200),
+    before_seq: int | None = Query(default=None),
+    after_seq: int | None = Query(default=None),
+) -> list[dict]:
+    """Return displayable messages for a thread (across all runs)."""
+    event_store = get_run_event_store(request)
+    return await event_store.list_messages(thread_id, limit=limit, before_seq=before_seq, after_seq=after_seq)
+
+
+@router.get("/{thread_id}/runs/{run_id}/messages")
+@require_permission("runs", "read", owner_check=True)
+async def list_run_messages(thread_id: str, run_id: str, request: Request) -> list[dict]:
+    """Return displayable messages for a specific run."""
+    event_store = get_run_event_store(request)
+    return await event_store.list_messages_by_run(thread_id, run_id)
+
+
+@router.get("/{thread_id}/runs/{run_id}/events")
+@require_permission("runs", "read", owner_check=True)
+async def list_run_events(
+    thread_id: str,
+    run_id: str,
+    request: Request,
+    event_types: str | None = Query(default=None),
+    limit: int = Query(default=500, le=2000),
+) -> list[dict]:
+    """Return the full event stream for a run (debug/audit)."""
+    event_store = get_run_event_store(request)
+    types = event_types.split(",") if event_types else None
+    return await event_store.list_events(thread_id, run_id, event_types=types, limit=limit)
+
+
+@router.get("/{thread_id}/token-usage")
+@require_permission("threads", "read", owner_check=True)
+async def thread_token_usage(thread_id: str, request: Request) -> dict:
+    """Thread-level token usage aggregation."""
+    run_store = get_run_store(request)
+    agg = await run_store.aggregate_tokens_by_thread(thread_id)
+    return {"thread_id": thread_id, **agg}

backend/app/gateway/routers/threads.py

@@ -0,0 +1,593 @@
+"""Thread CRUD, state, and history endpoints.
+
+Combines the existing thread-local filesystem cleanup with LangGraph
+Platform-compatible thread management backed by the checkpointer.
+
+Channel values returned in state responses are serialized through
+:func:`deerflow.runtime.serialization.serialize_channel_values` to
+ensure LangChain message objects are converted to JSON-safe dicts
+matching the LangGraph Platform wire format expected by the
+``useStream`` React hook.
+"""
+
+from __future__ import annotations
+
+import logging
+import time
+import uuid
+from typing import Any
+
+from fastapi import APIRouter, HTTPException, Request
+from pydantic import BaseModel, Field
+
+from app.gateway.authz import require_permission
+from app.gateway.deps import get_checkpointer
+from app.gateway.utils import sanitize_log_param
+from deerflow.config.paths import Paths, get_paths
+from deerflow.runtime import serialize_channel_values
+
+logger = logging.getLogger(__name__)
+router = APIRouter(prefix="/api/threads", tags=["threads"])
+
+
+# ---------------------------------------------------------------------------
+# Response / request models
+# ---------------------------------------------------------------------------
+
+
+class ThreadDeleteResponse(BaseModel):
+    """Response model for thread cleanup."""
+
+    success: bool
+    message: str
+
+
+class ThreadResponse(BaseModel):
+    """Response model for a single thread."""
+
+    thread_id: str = Field(description="Unique thread identifier")
+    status: str = Field(default="idle", description="Thread status: idle, busy, interrupted, error")
+    created_at: str = Field(default="", description="ISO timestamp")
+    updated_at: str = Field(default="", description="ISO timestamp")
+    metadata: dict[str, Any] = Field(default_factory=dict, description="Thread metadata")
+    values: dict[str, Any] = Field(default_factory=dict, description="Current state channel values")
+    interrupts: dict[str, Any] = Field(default_factory=dict, description="Pending interrupts")
+
+
+class ThreadCreateRequest(BaseModel):
+    """Request body for creating a thread."""
+
+    thread_id: str | None = Field(default=None, description="Optional thread ID (auto-generated if omitted)")
+    assistant_id: str | None = Field(default=None, description="Associate thread with an assistant")
+    metadata: dict[str, Any] = Field(default_factory=dict, description="Initial metadata")
+
+
+class ThreadSearchRequest(BaseModel):
+    """Request body for searching threads."""
+
+    metadata: dict[str, Any] = Field(default_factory=dict, description="Metadata filter (exact match)")
+    limit: int = Field(default=100, ge=1, le=1000, description="Maximum results")
+    offset: int = Field(default=0, ge=0, description="Pagination offset")
+    status: str | None = Field(default=None, description="Filter by thread status")
+
+
+class ThreadStateResponse(BaseModel):
+    """Response model for thread state."""
+
+    values: dict[str, Any] = Field(default_factory=dict, description="Current channel values")
+    next: list[str] = Field(default_factory=list, description="Next tasks to execute")
+    metadata: dict[str, Any] = Field(default_factory=dict, description="Checkpoint metadata")
+    checkpoint: dict[str, Any] = Field(default_factory=dict, description="Checkpoint info")
+    checkpoint_id: str | None = Field(default=None, description="Current checkpoint ID")
+    parent_checkpoint_id: str | None = Field(default=None, description="Parent checkpoint ID")
+    created_at: str | None = Field(default=None, description="Checkpoint timestamp")
+    tasks: list[dict[str, Any]] = Field(default_factory=list, description="Interrupted task details")
+
+
+class ThreadPatchRequest(BaseModel):
+    """Request body for patching thread metadata."""
+
+    metadata: dict[str, Any] = Field(default_factory=dict, description="Metadata to merge")
+
+
+class ThreadStateUpdateRequest(BaseModel):
+    """Request body for updating thread state (human-in-the-loop resume)."""
+
+    values: dict[str, Any] | None = Field(default=None, description="Channel values to merge")
+    checkpoint_id: str | None = Field(default=None, description="Checkpoint to branch from")
+    checkpoint: dict[str, Any] | None = Field(default=None, description="Full checkpoint object")
+    as_node: str | None = Field(default=None, description="Node identity for the update")
+
+
+class HistoryEntry(BaseModel):
+    """Single checkpoint history entry."""
+
+    checkpoint_id: str
+    parent_checkpoint_id: str | None = None
+    metadata: dict[str, Any] = Field(default_factory=dict)
+    values: dict[str, Any] = Field(default_factory=dict)
+    created_at: str | None = None
+    next: list[str] = Field(default_factory=list)
+
+
+class ThreadHistoryRequest(BaseModel):
+    """Request body for checkpoint history."""
+
+    limit: int = Field(default=10, ge=1, le=100, description="Maximum entries")
+    before: str | None = Field(default=None, description="Cursor for pagination")
+
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+
+def _delete_thread_data(thread_id: str, paths: Paths | None = None) -> ThreadDeleteResponse:
+    """Delete local persisted filesystem data for a thread."""
+    path_manager = paths or get_paths()
+    try:
+        path_manager.delete_thread_dir(thread_id)
+    except ValueError as exc:
+        raise HTTPException(status_code=422, detail=str(exc)) from exc
+    except FileNotFoundError:
+        # Not critical — thread data may not exist on disk
+        logger.debug("No local thread data to delete for %s", sanitize_log_param(thread_id))
+        return ThreadDeleteResponse(success=True, message=f"No local data for {thread_id}")
+    except Exception as exc:
+        logger.exception("Failed to delete thread data for %s", sanitize_log_param(thread_id))
+        raise HTTPException(status_code=500, detail="Failed to delete local thread data.") from exc
+
+    logger.info("Deleted local thread data for %s", sanitize_log_param(thread_id))
+    return ThreadDeleteResponse(success=True, message=f"Deleted local thread data for {thread_id}")
+
+
+def _derive_thread_status(checkpoint_tuple) -> str:
+    """Derive thread status from checkpoint metadata."""
+    if checkpoint_tuple is None:
+        return "idle"
+    pending_writes = getattr(checkpoint_tuple, "pending_writes", None) or []
+
+    # Check for error in pending writes
+    for pw in pending_writes:
+        if len(pw) >= 2 and pw[1] == "__error__":
+            return "error"
+
+    # Check for pending next tasks (indicates interrupt)
+    tasks = getattr(checkpoint_tuple, "tasks", None)
+    if tasks:
+        return "interrupted"
+
+    return "idle"
+
+
+# ---------------------------------------------------------------------------
+# Endpoints
+# ---------------------------------------------------------------------------
+
+
+@router.delete("/{thread_id}", response_model=ThreadDeleteResponse)
+@require_permission("threads", "delete", owner_check=True)
+async def delete_thread_data(thread_id: str, request: Request) -> ThreadDeleteResponse:
+    """Delete local persisted filesystem data for a thread.
+
+    Cleans DeerFlow-managed thread directories, removes checkpoint data,
+    and removes the thread_meta row from the configured ThreadMetaStore
+    (sqlite or memory).
+    """
+    from app.gateway.deps import get_thread_meta_repo
+
+    # Clean local filesystem
+    response = _delete_thread_data(thread_id)
+
+    # Remove checkpoints (best-effort)
+    checkpointer = getattr(request.app.state, "checkpointer", None)
+    if checkpointer is not None:
+        try:
+            if hasattr(checkpointer, "adelete_thread"):
+                await checkpointer.adelete_thread(thread_id)
+        except Exception:
+            logger.debug("Could not delete checkpoints for thread %s (not critical)", sanitize_log_param(thread_id))
+
+    # Remove thread_meta row (best-effort) — required for sqlite backend
+    # so the deleted thread no longer appears in /threads/search.
+    try:
+        thread_meta_repo = get_thread_meta_repo(request)
+        await thread_meta_repo.delete(thread_id)
+    except Exception:
+        logger.debug("Could not delete thread_meta for %s (not critical)", sanitize_log_param(thread_id))
+
+    return response
+
+
+@router.post("", response_model=ThreadResponse)
+async def create_thread(body: ThreadCreateRequest, request: Request) -> ThreadResponse:
+    """Create a new thread.
+
+    Writes a thread_meta record (so the thread appears in /threads/search)
+    and an empty checkpoint (so state endpoints work immediately).
+    Idempotent: returns the existing record when ``thread_id`` already exists.
+    """
+    from app.gateway.deps import get_thread_meta_repo
+
+    checkpointer = get_checkpointer(request)
+    thread_meta_repo = get_thread_meta_repo(request)
+    thread_id = body.thread_id or str(uuid.uuid4())
+    now = time.time()
+
+    # Idempotency: return existing record when already present
+    existing_record = await thread_meta_repo.get(thread_id)
+    if existing_record is not None:
+        return ThreadResponse(
+            thread_id=thread_id,
+            status=existing_record.get("status", "idle"),
+            created_at=str(existing_record.get("created_at", "")),
+            updated_at=str(existing_record.get("updated_at", "")),
+            metadata=existing_record.get("metadata", {}),
+        )
+
+    # Write thread_meta so the thread appears in /threads/search immediately
+    try:
+        await thread_meta_repo.create(
+            thread_id,
+            assistant_id=getattr(body, "assistant_id", None),
+            metadata=body.metadata,
+        )
+    except Exception:
+        logger.exception("Failed to write thread_meta for %s", sanitize_log_param(thread_id))
+        raise HTTPException(status_code=500, detail="Failed to create thread")
+
+    # Write an empty checkpoint so state endpoints work immediately
+    config = {"configurable": {"thread_id": thread_id, "checkpoint_ns": ""}}
+    try:
+        from langgraph.checkpoint.base import empty_checkpoint
+
+        ckpt_metadata = {
+            "step": -1,
+            "source": "input",
+            "writes": None,
+            "parents": {},
+            **body.metadata,
+            "created_at": now,
+        }
+        await checkpointer.aput(config, empty_checkpoint(), ckpt_metadata, {})
+    except Exception:
+        logger.exception("Failed to create checkpoint for thread %s", sanitize_log_param(thread_id))
+        raise HTTPException(status_code=500, detail="Failed to create thread")
+
+    logger.info("Thread created: %s", sanitize_log_param(thread_id))
+    return ThreadResponse(
+        thread_id=thread_id,
+        status="idle",
+        created_at=str(now),
+        updated_at=str(now),
+        metadata=body.metadata,
+    )
+
+
+@router.post("/search", response_model=list[ThreadResponse])
+async def search_threads(body: ThreadSearchRequest, request: Request) -> list[ThreadResponse]:
+    """Search and list threads.
+
+    Delegates to the configured ThreadMetaStore implementation
+    (SQL-backed for sqlite/postgres, Store-backed for memory mode).
+    """
+    from app.gateway.deps import get_thread_meta_repo
+
+    repo = get_thread_meta_repo(request)
+    rows = await repo.search(
+        metadata=body.metadata or None,
+        status=body.status,
+        limit=body.limit,
+        offset=body.offset,
+    )
+    return [
+        ThreadResponse(
+            thread_id=r["thread_id"],
+            status=r.get("status", "idle"),
+            created_at=r.get("created_at", ""),
+            updated_at=r.get("updated_at", ""),
+            metadata=r.get("metadata", {}),
+            values={"title": r["display_name"]} if r.get("display_name") else {},
+            interrupts={},
+        )
+        for r in rows
+    ]
+
+
+@router.patch("/{thread_id}", response_model=ThreadResponse)
+@require_permission("threads", "write", owner_check=True)
+async def patch_thread(thread_id: str, body: ThreadPatchRequest, request: Request) -> ThreadResponse:
+    """Merge metadata into a thread record."""
+    from app.gateway.deps import get_thread_meta_repo
+
+    thread_meta_repo = get_thread_meta_repo(request)
+    record = await thread_meta_repo.get(thread_id)
+    if record is None:
+        raise HTTPException(status_code=404, detail=f"Thread {thread_id} not found")
+
+    try:
+        await thread_meta_repo.update_metadata(thread_id, body.metadata)
+    except Exception:
+        logger.exception("Failed to patch thread %s", sanitize_log_param(thread_id))
+        raise HTTPException(status_code=500, detail="Failed to update thread")
+
+    # Re-read to get the merged metadata + refreshed updated_at
+    record = await thread_meta_repo.get(thread_id) or record
+    return ThreadResponse(
+        thread_id=thread_id,
+        status=record.get("status", "idle"),
+        created_at=str(record.get("created_at", "")),
+        updated_at=str(record.get("updated_at", "")),
+        metadata=record.get("metadata", {}),
+    )
+
+
+@router.get("/{thread_id}", response_model=ThreadResponse)
+@require_permission("threads", "read", owner_check=True)
+async def get_thread(thread_id: str, request: Request) -> ThreadResponse:
+    """Get thread info.
+
+    Reads metadata from the ThreadMetaStore and derives the accurate
+    execution status from the checkpointer.  Falls back to the checkpointer
+    alone for threads that pre-date ThreadMetaStore adoption (backward compat).
+    """
+    from app.gateway.deps import get_thread_meta_repo
+
+    thread_meta_repo = get_thread_meta_repo(request)
+    checkpointer = get_checkpointer(request)
+
+    record: dict | None = await thread_meta_repo.get(thread_id)
+
+    # Derive accurate status from the checkpointer
+    config = {"configurable": {"thread_id": thread_id, "checkpoint_ns": ""}}
+    try:
+        checkpoint_tuple = await checkpointer.aget_tuple(config)
+    except Exception:
+        logger.exception("Failed to get checkpoint for thread %s", sanitize_log_param(thread_id))
+        raise HTTPException(status_code=500, detail="Failed to get thread")
+
+    if record is None and checkpoint_tuple is None:
+        raise HTTPException(status_code=404, detail=f"Thread {thread_id} not found")
+
+    # If the thread exists in the checkpointer but not in thread_meta (e.g.
+    # legacy data created before thread_meta adoption), synthesize a minimal
+    # record from the checkpoint metadata.
+    if record is None and checkpoint_tuple is not None:
+        ckpt_meta = getattr(checkpoint_tuple, "metadata", {}) or {}
+        record = {
+            "thread_id": thread_id,
+            "status": "idle",
+            "created_at": ckpt_meta.get("created_at", ""),
+            "updated_at": ckpt_meta.get("updated_at", ckpt_meta.get("created_at", "")),
+            "metadata": {k: v for k, v in ckpt_meta.items() if k not in ("created_at", "updated_at", "step", "source", "writes", "parents")},
+        }
+
+    if record is None:
+        raise HTTPException(status_code=404, detail=f"Thread {thread_id} not found")
+
+    status = _derive_thread_status(checkpoint_tuple) if checkpoint_tuple is not None else record.get("status", "idle")
+    checkpoint = getattr(checkpoint_tuple, "checkpoint", {}) or {} if checkpoint_tuple is not None else {}
+    channel_values = checkpoint.get("channel_values", {})
+
+    return ThreadResponse(
+        thread_id=thread_id,
+        status=status,
+        created_at=str(record.get("created_at", "")),
+        updated_at=str(record.get("updated_at", "")),
+        metadata=record.get("metadata", {}),
+        values=serialize_channel_values(channel_values),
+    )
+
+
+@router.get("/{thread_id}/state", response_model=ThreadStateResponse)
+@require_permission("threads", "read", owner_check=True)
+async def get_thread_state(thread_id: str, request: Request) -> ThreadStateResponse:
+    """Get the latest state snapshot for a thread.
+
+    Channel values are serialized to ensure LangChain message objects
+    are converted to JSON-safe dicts.
+    """
+    checkpointer = get_checkpointer(request)
+
+    config = {"configurable": {"thread_id": thread_id, "checkpoint_ns": ""}}
+    try:
+        checkpoint_tuple = await checkpointer.aget_tuple(config)
+    except Exception:
+        logger.exception("Failed to get state for thread %s", sanitize_log_param(thread_id))
+        raise HTTPException(status_code=500, detail="Failed to get thread state")
+
+    if checkpoint_tuple is None:
+        raise HTTPException(status_code=404, detail=f"Thread {thread_id} not found")
+
+    checkpoint = getattr(checkpoint_tuple, "checkpoint", {}) or {}
+    metadata = getattr(checkpoint_tuple, "metadata", {}) or {}
+    checkpoint_id = None
+    ckpt_config = getattr(checkpoint_tuple, "config", {})
+    if ckpt_config:
+        checkpoint_id = ckpt_config.get("configurable", {}).get("checkpoint_id")
+
+    channel_values = checkpoint.get("channel_values", {})
+
+    parent_config = getattr(checkpoint_tuple, "parent_config", None)
+    parent_checkpoint_id = None
+    if parent_config:
+        parent_checkpoint_id = parent_config.get("configurable", {}).get("checkpoint_id")
+
+    tasks_raw = getattr(checkpoint_tuple, "tasks", []) or []
+    next_tasks = [t.name for t in tasks_raw if hasattr(t, "name")]
+    tasks = [{"id": getattr(t, "id", ""), "name": getattr(t, "name", "")} for t in tasks_raw]
+
+    return ThreadStateResponse(
+        values=serialize_channel_values(channel_values),
+        next=next_tasks,
+        metadata=metadata,
+        checkpoint={"id": checkpoint_id, "ts": str(metadata.get("created_at", ""))},
+        checkpoint_id=checkpoint_id,
+        parent_checkpoint_id=parent_checkpoint_id,
+        created_at=str(metadata.get("created_at", "")),
+        tasks=tasks,
+    )
+
+
+@router.post("/{thread_id}/state", response_model=ThreadStateResponse)
+@require_permission("threads", "write", owner_check=True)
+async def update_thread_state(thread_id: str, body: ThreadStateUpdateRequest, request: Request) -> ThreadStateResponse:
+    """Update thread state (e.g. for human-in-the-loop resume or title rename).
+
+    Writes a new checkpoint that merges *body.values* into the latest
+    channel values, then syncs any updated ``title`` field through the
+    ThreadMetaStore abstraction so that ``/threads/search`` reflects the
+    change immediately in both sqlite and memory backends.
+    """
+    from app.gateway.deps import get_thread_meta_repo
+
+    checkpointer = get_checkpointer(request)
+    thread_meta_repo = get_thread_meta_repo(request)
+
+    # checkpoint_ns must be present in the config for aput — default to ""
+    # (the root graph namespace).  checkpoint_id is optional; omitting it
+    # fetches the latest checkpoint for the thread.
+    read_config: dict[str, Any] = {
+        "configurable": {
+            "thread_id": thread_id,
+            "checkpoint_ns": "",
+        }
+    }
+    if body.checkpoint_id:
+        read_config["configurable"]["checkpoint_id"] = body.checkpoint_id
+
+    try:
+        checkpoint_tuple = await checkpointer.aget_tuple(read_config)
+    except Exception:
+        logger.exception("Failed to get state for thread %s", sanitize_log_param(thread_id))
+        raise HTTPException(status_code=500, detail="Failed to get thread state")
+
+    if checkpoint_tuple is None:
+        raise HTTPException(status_code=404, detail=f"Thread {thread_id} not found")
+
+    # Work on mutable copies so we don't accidentally mutate cached objects.
+    checkpoint: dict[str, Any] = dict(getattr(checkpoint_tuple, "checkpoint", {}) or {})
+    metadata: dict[str, Any] = dict(getattr(checkpoint_tuple, "metadata", {}) or {})
+    channel_values: dict[str, Any] = dict(checkpoint.get("channel_values", {}))
+
+    if body.values:
+        channel_values.update(body.values)
+
+    checkpoint["channel_values"] = channel_values
+    metadata["updated_at"] = time.time()
+
+    if body.as_node:
+        metadata["source"] = "update"
+        metadata["step"] = metadata.get("step", 0) + 1
+        metadata["writes"] = {body.as_node: body.values}
+
+    # aput requires checkpoint_ns in the config — use the same config used for the
+    # read (which always includes checkpoint_ns="").  Do NOT include checkpoint_id
+    # so that aput generates a fresh checkpoint ID for the new snapshot.
+    write_config: dict[str, Any] = {
+        "configurable": {
+            "thread_id": thread_id,
+            "checkpoint_ns": "",
+        }
+    }
+    try:
+        new_config = await checkpointer.aput(write_config, checkpoint, metadata, {})
+    except Exception:
+        logger.exception("Failed to update state for thread %s", sanitize_log_param(thread_id))
+        raise HTTPException(status_code=500, detail="Failed to update thread state")
+
+    new_checkpoint_id: str | None = None
+    if isinstance(new_config, dict):
+        new_checkpoint_id = new_config.get("configurable", {}).get("checkpoint_id")
+
+    # Sync title changes through the ThreadMetaStore abstraction so /threads/search
+    # reflects them immediately in both sqlite and memory backends.
+    if body.values and "title" in body.values:
+        new_title = body.values["title"]
+        if new_title:  # Skip empty strings and None
+            try:
+                await thread_meta_repo.update_display_name(thread_id, new_title)
+            except Exception:
+                logger.debug("Failed to sync title to thread_meta for %s (non-fatal)", sanitize_log_param(thread_id))
+
+    return ThreadStateResponse(
+        values=serialize_channel_values(channel_values),
+        next=[],
+        metadata=metadata,
+        checkpoint_id=new_checkpoint_id,
+        created_at=str(metadata.get("created_at", "")),
+    )
+
+
+@router.post("/{thread_id}/history", response_model=list[HistoryEntry])
+@require_permission("threads", "read", owner_check=True)
+async def get_thread_history(thread_id: str, body: ThreadHistoryRequest, request: Request) -> list[HistoryEntry]:
+    """Get checkpoint history for a thread.
+
+    Messages are read from the checkpointer's channel values (the
+    authoritative source) and serialized via
+    :func:`~deerflow.runtime.serialization.serialize_channel_values`.
+    Only the latest (first) checkpoint carries the ``messages`` key to
+    avoid duplicating them across every entry.
+    """
+    checkpointer = get_checkpointer(request)
+
+    config: dict[str, Any] = {"configurable": {"thread_id": thread_id}}
+    if body.before:
+        config["configurable"]["checkpoint_id"] = body.before
+
+    entries: list[HistoryEntry] = []
+    is_latest_checkpoint = True
+    try:
+        async for checkpoint_tuple in checkpointer.alist(config, limit=body.limit):
+            ckpt_config = getattr(checkpoint_tuple, "config", {})
+            parent_config = getattr(checkpoint_tuple, "parent_config", None)
+            metadata = getattr(checkpoint_tuple, "metadata", {}) or {}
+            checkpoint = getattr(checkpoint_tuple, "checkpoint", {}) or {}
+
+            checkpoint_id = ckpt_config.get("configurable", {}).get("checkpoint_id", "")
+            parent_id = None
+            if parent_config:
+                parent_id = parent_config.get("configurable", {}).get("checkpoint_id")
+
+            channel_values = checkpoint.get("channel_values", {})
+
+            # Build values from checkpoint channel_values
+            values: dict[str, Any] = {}
+            if title := channel_values.get("title"):
+                values["title"] = title
+            if thread_data := channel_values.get("thread_data"):
+                values["thread_data"] = thread_data
+
+            # Attach messages from checkpointer only for the latest checkpoint
+            if is_latest_checkpoint:
+                messages = channel_values.get("messages")
+                if messages:
+                    values["messages"] = serialize_channel_values({"messages": messages}).get("messages", [])
+            is_latest_checkpoint = False
+
+            # Derive next tasks
+            tasks_raw = getattr(checkpoint_tuple, "tasks", []) or []
+            next_tasks = [t.name for t in tasks_raw if hasattr(t, "name")]
+
+            # Strip LangGraph internal keys from metadata
+            user_meta = {k: v for k, v in metadata.items() if k not in ("created_at", "updated_at", "step", "source", "writes", "parents")}
+            # Keep step for ordering context
+            if "step" in metadata:
+                user_meta["step"] = metadata["step"]
+
+            entries.append(
+                HistoryEntry(
+                    checkpoint_id=checkpoint_id,
+                    parent_checkpoint_id=parent_id,
+                    metadata=user_meta,
+                    values=values,
+                    created_at=str(metadata.get("created_at", "")),
+                    next=next_tasks,
+                )
+            )
+    except Exception:
+        logger.exception("Failed to get history for thread %s", sanitize_log_param(thread_id))
+        raise HTTPException(status_code=500, detail="Failed to get thread history")
+
+    return entries

backend/app/gateway/routers/uploads.py

@@ -0,0 +1,173 @@
+"""Upload router for handling file uploads."""
+
+import logging
+import os
+import stat
+
+from fastapi import APIRouter, File, HTTPException, Request, UploadFile
+from pydantic import BaseModel
+
+from app.gateway.authz import require_permission
+from deerflow.config.paths import get_paths
+from deerflow.sandbox.sandbox_provider import get_sandbox_provider
+from deerflow.uploads.manager import (
+    PathTraversalError,
+    delete_file_safe,
+    enrich_file_listing,
+    ensure_uploads_dir,
+    get_uploads_dir,
+    list_files_in_dir,
+    normalize_filename,
+    upload_artifact_url,
+    upload_virtual_path,
+)
+from deerflow.utils.file_conversion import CONVERTIBLE_EXTENSIONS, convert_file_to_markdown
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/api/threads/{thread_id}/uploads", tags=["uploads"])
+
+
+class UploadResponse(BaseModel):
+    """Response model for file upload."""
+
+    success: bool
+    files: list[dict[str, str]]
+    message: str
+
+
+def _make_file_sandbox_writable(file_path: os.PathLike[str] | str) -> None:
+    """Ensure uploaded files remain writable when mounted into non-local sandboxes.
+
+    In AIO sandbox mode, the gateway writes the authoritative host-side file
+    first, then the sandbox runtime may rewrite the same mounted path. Granting
+    world-writable access here prevents permission mismatches between the
+    gateway user and the sandbox runtime user.
+    """
+    file_stat = os.lstat(file_path)
+    if stat.S_ISLNK(file_stat.st_mode):
+        logger.warning("Skipping sandbox chmod for symlinked upload path: %s", file_path)
+        return
+
+    writable_mode = stat.S_IMODE(file_stat.st_mode) | stat.S_IWUSR | stat.S_IWGRP | stat.S_IWOTH
+    chmod_kwargs = {"follow_symlinks": False} if os.chmod in os.supports_follow_symlinks else {}
+    os.chmod(file_path, writable_mode, **chmod_kwargs)
+
+
+@router.post("", response_model=UploadResponse)
+@require_permission("threads", "write", owner_check=True)
+async def upload_files(
+    thread_id: str,
+    request: Request,
+    files: list[UploadFile] = File(...),
+) -> UploadResponse:
+    """Upload multiple files to a thread's uploads directory."""
+    if not files:
+        raise HTTPException(status_code=400, detail="No files provided")
+
+    try:
+        uploads_dir = ensure_uploads_dir(thread_id)
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    sandbox_uploads = get_paths().sandbox_uploads_dir(thread_id)
+    uploaded_files = []
+
+    sandbox_provider = get_sandbox_provider()
+    sandbox_id = sandbox_provider.acquire(thread_id)
+    sandbox = sandbox_provider.get(sandbox_id)
+
+    for file in files:
+        if not file.filename:
+            continue
+
+        try:
+            safe_filename = normalize_filename(file.filename)
+        except ValueError:
+            logger.warning(f"Skipping file with unsafe filename: {file.filename!r}")
+            continue
+
+        try:
+            content = await file.read()
+            file_path = uploads_dir / safe_filename
+            file_path.write_bytes(content)
+
+            virtual_path = upload_virtual_path(safe_filename)
+
+            if sandbox_id != "local":
+                _make_file_sandbox_writable(file_path)
+                sandbox.update_file(virtual_path, content)
+
+            file_info = {
+                "filename": safe_filename,
+                "size": str(len(content)),
+                "path": str(sandbox_uploads / safe_filename),
+                "virtual_path": virtual_path,
+                "artifact_url": upload_artifact_url(thread_id, safe_filename),
+            }
+
+            logger.info(f"Saved file: {safe_filename} ({len(content)} bytes) to {file_info['path']}")
+
+            file_ext = file_path.suffix.lower()
+            if file_ext in CONVERTIBLE_EXTENSIONS:
+                md_path = await convert_file_to_markdown(file_path)
+                if md_path:
+                    md_virtual_path = upload_virtual_path(md_path.name)
+
+                    if sandbox_id != "local":
+                        _make_file_sandbox_writable(md_path)
+                        sandbox.update_file(md_virtual_path, md_path.read_bytes())
+
+                    file_info["markdown_file"] = md_path.name
+                    file_info["markdown_path"] = str(sandbox_uploads / md_path.name)
+                    file_info["markdown_virtual_path"] = md_virtual_path
+                    file_info["markdown_artifact_url"] = upload_artifact_url(thread_id, md_path.name)
+
+            uploaded_files.append(file_info)
+
+        except Exception as e:
+            logger.error(f"Failed to upload {file.filename}: {e}")
+            raise HTTPException(status_code=500, detail=f"Failed to upload {file.filename}: {str(e)}")
+
+    return UploadResponse(
+        success=True,
+        files=uploaded_files,
+        message=f"Successfully uploaded {len(uploaded_files)} file(s)",
+    )
+
+
+@router.get("/list", response_model=dict)
+@require_permission("threads", "read", owner_check=True)
+async def list_uploaded_files(thread_id: str, request: Request) -> dict:
+    """List all files in a thread's uploads directory."""
+    try:
+        uploads_dir = get_uploads_dir(thread_id)
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    result = list_files_in_dir(uploads_dir)
+    enrich_file_listing(result, thread_id)
+
+    # Gateway additionally includes the sandbox-relative path.
+    sandbox_uploads = get_paths().sandbox_uploads_dir(thread_id)
+    for f in result["files"]:
+        f["path"] = str(sandbox_uploads / f["filename"])
+
+    return result
+
+
+@router.delete("/{filename}")
+@require_permission("threads", "delete", owner_check=True)
+async def delete_uploaded_file(thread_id: str, filename: str, request: Request) -> dict:
+    """Delete a file from a thread's uploads directory."""
+    try:
+        uploads_dir = get_uploads_dir(thread_id)
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    try:
+        return delete_file_safe(uploads_dir, filename, convertible_extensions=CONVERTIBLE_EXTENSIONS)
+    except FileNotFoundError:
+        raise HTTPException(status_code=404, detail=f"File not found: {filename}")
+    except PathTraversalError:
+        raise HTTPException(status_code=400, detail="Invalid path")
+    except Exception as e:
+        logger.error(f"Failed to delete {filename}: {e}")
+        raise HTTPException(status_code=500, detail=f"Failed to delete {filename}: {str(e)}")

backend/app/gateway/services.py

@@ -0,0 +1,325 @@
+"""Run lifecycle service layer.
+
+Centralizes the business logic for creating runs, formatting SSE
+frames, and consuming stream bridge events.  Router modules
+(``thread_runs``, ``runs``) are thin HTTP handlers that delegate here.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import dataclasses
+import json
+import logging
+import re
+from typing import Any
+
+from fastapi import HTTPException, Request
+from langchain_core.messages import HumanMessage
+
+from app.gateway.deps import get_run_context, get_run_manager, get_run_store, get_stream_bridge
+from app.gateway.utils import sanitize_log_param
+from deerflow.runtime import (
+    END_SENTINEL,
+    HEARTBEAT_SENTINEL,
+    ConflictError,
+    DisconnectMode,
+    RunManager,
+    RunRecord,
+    RunStatus,
+    StreamBridge,
+    UnsupportedStrategyError,
+    run_agent,
+)
+
+logger = logging.getLogger(__name__)
+
+
+# ---------------------------------------------------------------------------
+# SSE formatting
+# ---------------------------------------------------------------------------
+
+
+def format_sse(event: str, data: Any, *, event_id: str | None = None) -> str:
+    """Format a single SSE frame.
+
+    Field order: ``event:`` -> ``data:`` -> ``id:`` (optional) -> blank line.
+    This matches the LangGraph Platform wire format consumed by the
+    ``useStream`` React hook and the Python ``langgraph-sdk`` SSE decoder.
+    """
+    payload = json.dumps(data, default=str, ensure_ascii=False)
+    parts = [f"event: {event}", f"data: {payload}"]
+    if event_id:
+        parts.append(f"id: {event_id}")
+    parts.append("")
+    parts.append("")
+    return "\n".join(parts)
+
+
+# ---------------------------------------------------------------------------
+# Input / config helpers
+# ---------------------------------------------------------------------------
+
+
+def normalize_stream_modes(raw: list[str] | str | None) -> list[str]:
+    """Normalize the stream_mode parameter to a list.
+
+    Default matches what ``useStream`` expects: values + messages-tuple.
+    """
+    if raw is None:
+        return ["values"]
+    if isinstance(raw, str):
+        return [raw]
+    return raw if raw else ["values"]
+
+
+def normalize_input(raw_input: dict[str, Any] | None) -> dict[str, Any]:
+    """Convert LangGraph Platform input format to LangChain state dict."""
+    if raw_input is None:
+        return {}
+    messages = raw_input.get("messages")
+    if messages and isinstance(messages, list):
+        converted = []
+        for msg in messages:
+            if isinstance(msg, dict):
+                role = msg.get("role", msg.get("type", "user"))
+                content = msg.get("content", "")
+                if role in ("user", "human"):
+                    converted.append(HumanMessage(content=content))
+                else:
+                    # TODO: handle other message types (system, ai, tool)
+                    converted.append(HumanMessage(content=content))
+            else:
+                converted.append(msg)
+        return {**raw_input, "messages": converted}
+    return raw_input
+
+
+_DEFAULT_ASSISTANT_ID = "lead_agent"
+
+
+def resolve_agent_factory(assistant_id: str | None):
+    """Resolve the agent factory callable from config.
+
+    Custom agents are implemented as ``lead_agent`` + an ``agent_name``
+    injected into ``configurable`` — see :func:`build_run_config`.  All
+    ``assistant_id`` values therefore map to the same factory; the routing
+    happens inside ``make_lead_agent`` when it reads ``cfg["agent_name"]``.
+    """
+    from deerflow.agents.lead_agent.agent import make_lead_agent
+
+    return make_lead_agent
+
+
+def build_run_config(
+    thread_id: str,
+    request_config: dict[str, Any] | None,
+    metadata: dict[str, Any] | None,
+    *,
+    assistant_id: str | None = None,
+) -> dict[str, Any]:
+    """Build a RunnableConfig dict for the agent.
+
+    When *assistant_id* refers to a custom agent (anything other than
+    ``"lead_agent"`` / ``None``), the name is forwarded as
+    ``configurable["agent_name"]``.  ``make_lead_agent`` reads this key to
+    load the matching ``agents/<name>/SOUL.md`` and per-agent config —
+    without it the agent silently runs as the default lead agent.
+
+    This mirrors the channel manager's ``_resolve_run_params`` logic so that
+    the LangGraph Platform-compatible HTTP API and the IM channel path behave
+    identically.
+    """
+    config: dict[str, Any] = {"recursion_limit": 100}
+    if request_config:
+        # LangGraph >= 0.6.0 introduced ``context`` as the preferred way to
+        # pass thread-level data and rejects requests that include both
+        # ``configurable`` and ``context``.  If the caller already sends
+        # ``context``, honour it and skip our own ``configurable`` dict.
+        if "context" in request_config:
+            if "configurable" in request_config:
+                logger.warning(
+                    "build_run_config: client sent both 'context' and 'configurable'; preferring 'context' (LangGraph >= 0.6.0). thread_id=%s, caller_configurable keys=%s",
+                    thread_id,
+                    list(request_config.get("configurable", {}).keys()),
+                )
+            config["context"] = request_config["context"]
+        else:
+            configurable = {"thread_id": thread_id}
+            configurable.update(request_config.get("configurable", {}))
+            config["configurable"] = configurable
+        for k, v in request_config.items():
+            if k not in ("configurable", "context"):
+                config[k] = v
+    else:
+        config["configurable"] = {"thread_id": thread_id}
+
+    # Inject custom agent name when the caller specified a non-default assistant.
+    # Honour an explicit configurable["agent_name"] in the request if already set.
+    if assistant_id and assistant_id != _DEFAULT_ASSISTANT_ID and "configurable" in config:
+        if "agent_name" not in config["configurable"]:
+            normalized = assistant_id.strip().lower().replace("_", "-")
+            if not normalized or not re.fullmatch(r"[a-z0-9-]+", normalized):
+                raise ValueError(f"Invalid assistant_id {assistant_id!r}: must contain only letters, digits, and hyphens after normalization.")
+            config["configurable"]["agent_name"] = normalized
+    if metadata:
+        config.setdefault("metadata", {}).update(metadata)
+    return config
+
+
+# ---------------------------------------------------------------------------
+# Run lifecycle
+# ---------------------------------------------------------------------------
+
+
+async def start_run(
+    body: Any,
+    thread_id: str,
+    request: Request,
+) -> RunRecord:
+    """Create a RunRecord and launch the background agent task.
+
+    Parameters
+    ----------
+    body : RunCreateRequest
+        The validated request body (typed as Any to avoid circular import
+        with the router module that defines the Pydantic model).
+    thread_id : str
+        Target thread.
+    request : Request
+        FastAPI request — used to retrieve singletons from ``app.state``.
+    """
+    bridge = get_stream_bridge(request)
+    run_mgr = get_run_manager(request)
+    run_ctx = get_run_context(request)
+
+    disconnect = DisconnectMode.cancel if body.on_disconnect == "cancel" else DisconnectMode.continue_
+
+    # Resolve follow_up_to_run_id: explicit from request, or auto-detect from latest successful run
+    follow_up_to_run_id = getattr(body, "follow_up_to_run_id", None)
+    if follow_up_to_run_id is None:
+        run_store = get_run_store(request)
+        try:
+            recent_runs = await run_store.list_by_thread(thread_id, limit=1)
+            if recent_runs and recent_runs[0].get("status") == "success":
+                follow_up_to_run_id = recent_runs[0]["run_id"]
+        except Exception:
+            pass  # Don't block run creation
+
+    # Enrich base context with per-run field
+    if follow_up_to_run_id:
+        run_ctx = dataclasses.replace(run_ctx, follow_up_to_run_id=follow_up_to_run_id)
+
+    try:
+        record = await run_mgr.create_or_reject(
+            thread_id,
+            body.assistant_id,
+            on_disconnect=disconnect,
+            metadata=body.metadata or {},
+            kwargs={"input": body.input, "config": body.config},
+            multitask_strategy=body.multitask_strategy,
+            follow_up_to_run_id=follow_up_to_run_id,
+        )
+    except ConflictError as exc:
+        raise HTTPException(status_code=409, detail=str(exc)) from exc
+    except UnsupportedStrategyError as exc:
+        raise HTTPException(status_code=501, detail=str(exc)) from exc
+
+    # Upsert thread metadata so the thread appears in /threads/search,
+    # even for threads that were never explicitly created via POST /threads
+    # (e.g. stateless runs).
+    try:
+        existing = await run_ctx.thread_meta_repo.get(thread_id)
+        if existing is None:
+            await run_ctx.thread_meta_repo.create(
+                thread_id,
+                assistant_id=body.assistant_id,
+                metadata=body.metadata,
+            )
+        else:
+            await run_ctx.thread_meta_repo.update_status(thread_id, "running")
+    except Exception:
+        logger.warning("Failed to upsert thread_meta for %s (non-fatal)", sanitize_log_param(thread_id))
+
+    agent_factory = resolve_agent_factory(body.assistant_id)
+    graph_input = normalize_input(body.input)
+    config = build_run_config(thread_id, body.config, body.metadata, assistant_id=body.assistant_id)
+
+    # Merge DeerFlow-specific context overrides into configurable.
+    # The ``context`` field is a custom extension for the langgraph-compat layer
+    # that carries agent configuration (model_name, thinking_enabled, etc.).
+    # Only agent-relevant keys are forwarded; unknown keys (e.g. thread_id) are ignored.
+    context = getattr(body, "context", None)
+    if context:
+        _CONTEXT_CONFIGURABLE_KEYS = {
+            "model_name",
+            "mode",
+            "thinking_enabled",
+            "reasoning_effort",
+            "is_plan_mode",
+            "subagent_enabled",
+            "max_concurrent_subagents",
+        }
+        configurable = config.setdefault("configurable", {})
+        for key in _CONTEXT_CONFIGURABLE_KEYS:
+            if key in context:
+                configurable.setdefault(key, context[key])
+
+    stream_modes = normalize_stream_modes(body.stream_mode)
+
+    task = asyncio.create_task(
+        run_agent(
+            bridge,
+            run_mgr,
+            record,
+            ctx=run_ctx,
+            agent_factory=agent_factory,
+            graph_input=graph_input,
+            config=config,
+            stream_modes=stream_modes,
+            stream_subgraphs=body.stream_subgraphs,
+            interrupt_before=body.interrupt_before,
+            interrupt_after=body.interrupt_after,
+        )
+    )
+    record.task = task
+
+    # Title sync is handled by worker.py's finally block which reads the
+    # title from the checkpoint and calls thread_meta_repo.update_display_name
+    # after the run completes.
+
+    return record
+
+
+async def sse_consumer(
+    bridge: StreamBridge,
+    record: RunRecord,
+    request: Request,
+    run_mgr: RunManager,
+):
+    """Async generator that yields SSE frames from the bridge.
+
+    The ``finally`` block implements ``on_disconnect`` semantics:
+    - ``cancel``: abort the background task on client disconnect.
+    - ``continue``: let the task run; events are discarded.
+    """
+    last_event_id = request.headers.get("Last-Event-ID")
+    try:
+        async for entry in bridge.subscribe(record.run_id, last_event_id=last_event_id):
+            if await request.is_disconnected():
+                break
+
+            if entry is HEARTBEAT_SENTINEL:
+                yield ": heartbeat\n\n"
+                continue
+
+            if entry is END_SENTINEL:
+                yield format_sse("end", None, event_id=entry.id or None)
+                return
+
+            yield format_sse(entry.event, entry.data, event_id=entry.id or None)
+
+    finally:
+        if record.status in (RunStatus.pending, RunStatus.running):
+            if record.on_disconnect == DisconnectMode.cancel:
+                await run_mgr.cancel(record.run_id)

backend/app/gateway/utils.py

@@ -0,0 +1,6 @@
+"""Shared utility helpers for the Gateway layer."""
+
+
+def sanitize_log_param(value: str) -> str:
+    """Strip control characters to prevent log injection."""
+    return value.replace("\n", "").replace("\r", "").replace("\x00", "")

backend/debug.py

@@ -0,0 +1,91 @@
+#!/usr/bin/env python
+"""
+Debug script for lead_agent.
+Run this file directly in VS Code with breakpoints.
+
+Requirements:
+    Run with `uv run` from the backend/ directory so that the uv workspace
+    resolves deerflow-harness and app packages correctly:
+
+        cd backend && PYTHONPATH=. uv run python debug.py
+
+Usage:
+    1. Set breakpoints in agent.py or other files
+    2. Press F5 or use "Run and Debug" panel
+    3. Input messages in the terminal to interact with the agent
+"""
+
+import asyncio
+import logging
+
+from dotenv import load_dotenv
+from langchain_core.messages import HumanMessage
+
+from deerflow.agents import make_lead_agent
+
+load_dotenv()
+
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
+    datefmt="%Y-%m-%d %H:%M:%S",
+)
+
+
+async def main():
+    # Initialize MCP tools at startup
+    try:
+        from deerflow.mcp import initialize_mcp_tools
+
+        await initialize_mcp_tools()
+    except Exception as e:
+        print(f"Warning: Failed to initialize MCP tools: {e}")
+
+    # Create agent with default config
+    config = {
+        "configurable": {
+            "thread_id": "debug-thread-001",
+            "thinking_enabled": True,
+            "is_plan_mode": True,
+            # Uncomment to use a specific model
+            "model_name": "kimi-k2.5",
+        }
+    }
+
+    agent = make_lead_agent(config)
+
+    print("=" * 50)
+    print("Lead Agent Debug Mode")
+    print("Type 'quit' or 'exit' to stop")
+    print("=" * 50)
+
+    while True:
+        try:
+            user_input = input("\nYou: ").strip()
+            if not user_input:
+                continue
+            if user_input.lower() in ("quit", "exit"):
+                print("Goodbye!")
+                break
+
+            # Invoke the agent
+            state = {"messages": [HumanMessage(content=user_input)]}
+            result = await agent.ainvoke(state, config=config, context={"thread_id": "debug-thread-001"})
+
+            # Print the response
+            if result.get("messages"):
+                last_message = result["messages"][-1]
+                print(f"\nAgent: {last_message.content}")
+
+        except KeyboardInterrupt:
+            print("\nInterrupted. Goodbye!")
+            break
+        except Exception as e:
+            print(f"\nError: {e}")
+            import traceback
+
+            traceback.print_exc()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

backend/docs/API.md

@@ -0,0 +1,631 @@
+# API Reference
+
+This document provides a complete reference for the DeerFlow backend APIs.
+
+## Overview
+
+DeerFlow backend exposes two sets of APIs:
+
+1. **LangGraph API** - Agent interactions, threads, and streaming (`/api/langgraph/*`)
+2. **Gateway API** - Models, MCP, skills, uploads, and artifacts (`/api/*`)
+
+All APIs are accessed through the Nginx reverse proxy at port 2026.
+
+## LangGraph API
+
+Base URL: `/api/langgraph`
+
+The LangGraph API is provided by the LangGraph server and follows the LangGraph SDK conventions.
+
+### Threads
+
+#### Create Thread
+
+```http
+POST /api/langgraph/threads
+Content-Type: application/json
+```
+
+**Request Body:**
+```json
+{
+  "metadata": {}
+}
+```
+
+**Response:**
+```json
+{
+  "thread_id": "abc123",
+  "created_at": "2024-01-15T10:30:00Z",
+  "metadata": {}
+}
+```
+
+#### Get Thread State
+
+```http
+GET /api/langgraph/threads/{thread_id}/state
+```
+
+**Response:**
+```json
+{
+  "values": {
+    "messages": [...],
+    "sandbox": {...},
+    "artifacts": [...],
+    "thread_data": {...},
+    "title": "Conversation Title"
+  },
+  "next": [],
+  "config": {...}
+}
+```
+
+### Runs
+
+#### Create Run
+
+Execute the agent with input.
+
+```http
+POST /api/langgraph/threads/{thread_id}/runs
+Content-Type: application/json
+```
+
+**Request Body:**
+```json
+{
+  "input": {
+    "messages": [
+      {
+        "role": "user",
+        "content": "Hello, can you help me?"
+      }
+    ]
+  },
+  "config": {
+    "configurable": {
+      "model_name": "gpt-4",
+      "thinking_enabled": false,
+      "is_plan_mode": false
+    }
+  },
+  "stream_mode": ["values", "messages-tuple", "custom"]
+}
+```
+
+**Stream Mode Compatibility:**
+- Use: `values`, `messages-tuple`, `custom`, `updates`, `events`, `debug`, `tasks`, `checkpoints`
+- Do not use: `tools` (deprecated/invalid in current `langgraph-api` and will trigger schema validation errors)
+
+**Configurable Options:**
+- `model_name` (string): Override the default model
+- `thinking_enabled` (boolean): Enable extended thinking for supported models
+- `is_plan_mode` (boolean): Enable TodoList middleware for task tracking
+
+**Response:** Server-Sent Events (SSE) stream
+
+```
+event: values
+data: {"messages": [...], "title": "..."}
+
+event: messages
+data: {"content": "Hello! I'd be happy to help.", "role": "assistant"}
+
+event: end
+data: {}
+```
+
+#### Get Run History
+
+```http
+GET /api/langgraph/threads/{thread_id}/runs
+```
+
+**Response:**
+```json
+{
+  "runs": [
+    {
+      "run_id": "run123",
+      "status": "success",
+      "created_at": "2024-01-15T10:30:00Z"
+    }
+  ]
+}
+```
+
+#### Stream Run
+
+Stream responses in real-time.
+
+```http
+POST /api/langgraph/threads/{thread_id}/runs/stream
+Content-Type: application/json
+```
+
+Same request body as Create Run. Returns SSE stream.
+
+---
+
+## Gateway API
+
+Base URL: `/api`
+
+### Models
+
+#### List Models
+
+Get all available LLM models from configuration.
+
+```http
+GET /api/models
+```
+
+**Response:**
+```json
+{
+  "models": [
+    {
+      "name": "gpt-4",
+      "display_name": "GPT-4",
+      "supports_thinking": false,
+      "supports_vision": true
+    },
+    {
+      "name": "claude-3-opus",
+      "display_name": "Claude 3 Opus",
+      "supports_thinking": false,
+      "supports_vision": true
+    },
+    {
+      "name": "deepseek-v3",
+      "display_name": "DeepSeek V3",
+      "supports_thinking": true,
+      "supports_vision": false
+    }
+  ]
+}
+```
+
+#### Get Model Details
+
+```http
+GET /api/models/{model_name}
+```
+
+**Response:**
+```json
+{
+  "name": "gpt-4",
+  "display_name": "GPT-4",
+  "model": "gpt-4",
+  "max_tokens": 4096,
+  "supports_thinking": false,
+  "supports_vision": true
+}
+```
+
+### MCP Configuration
+
+#### Get MCP Config
+
+Get current MCP server configurations.
+
+```http
+GET /api/mcp/config
+```
+
+**Response:**
+```json
+{
+  "mcpServers": {
+    "github": {
+      "enabled": true,
+      "type": "stdio",
+      "command": "npx",
+      "args": ["-y", "@modelcontextprotocol/server-github"],
+      "env": {
+        "GITHUB_TOKEN": "***"
+      },
+      "description": "GitHub operations"
+    },
+    "filesystem": {
+      "enabled": false,
+      "type": "stdio",
+      "command": "npx",
+      "args": ["-y", "@modelcontextprotocol/server-filesystem"],
+      "description": "File system access"
+    }
+  }
+}
+```
+
+#### Update MCP Config
+
+Update MCP server configurations.
+
+```http
+PUT /api/mcp/config
+Content-Type: application/json
+```
+
+**Request Body:**
+```json
+{
+  "mcpServers": {
+    "github": {
+      "enabled": true,
+      "type": "stdio",
+      "command": "npx",
+      "args": ["-y", "@modelcontextprotocol/server-github"],
+      "env": {
+        "GITHUB_TOKEN": "$GITHUB_TOKEN"
+      },
+      "description": "GitHub operations"
+    }
+  }
+}
+```
+
+**Response:**
+```json
+{
+  "success": true,
+  "message": "MCP configuration updated"
+}
+```
+
+### Skills
+
+#### List Skills
+
+Get all available skills.
+
+```http
+GET /api/skills
+```
+
+**Response:**
+```json
+{
+  "skills": [
+    {
+      "name": "pdf-processing",
+      "display_name": "PDF Processing",
+      "description": "Handle PDF documents efficiently",
+      "enabled": true,
+      "license": "MIT",
+      "path": "public/pdf-processing"
+    },
+    {
+      "name": "frontend-design",
+      "display_name": "Frontend Design",
+      "description": "Design and build frontend interfaces",
+      "enabled": false,
+      "license": "MIT",
+      "path": "public/frontend-design"
+    }
+  ]
+}
+```
+
+#### Get Skill Details
+
+```http
+GET /api/skills/{skill_name}
+```
+
+**Response:**
+```json
+{
+  "name": "pdf-processing",
+  "display_name": "PDF Processing",
+  "description": "Handle PDF documents efficiently",
+  "enabled": true,
+  "license": "MIT",
+  "path": "public/pdf-processing",
+  "allowed_tools": ["read_file", "write_file", "bash"],
+  "content": "# PDF Processing\n\nInstructions for the agent..."
+}
+```
+
+#### Enable Skill
+
+```http
+POST /api/skills/{skill_name}/enable
+```
+
+**Response:**
+```json
+{
+  "success": true,
+  "message": "Skill 'pdf-processing' enabled"
+}
+```
+
+#### Disable Skill
+
+```http
+POST /api/skills/{skill_name}/disable
+```
+
+**Response:**
+```json
+{
+  "success": true,
+  "message": "Skill 'pdf-processing' disabled"
+}
+```
+
+#### Install Skill
+
+Install a skill from a `.skill` file.
+
+```http
+POST /api/skills/install
+Content-Type: multipart/form-data
+```
+
+**Request Body:**
+- `file`: The `.skill` file to install
+
+**Response:**
+```json
+{
+  "success": true,
+  "message": "Skill 'my-skill' installed successfully",
+  "skill": {
+    "name": "my-skill",
+    "display_name": "My Skill",
+    "path": "custom/my-skill"
+  }
+}
+```
+
+### File Uploads
+
+#### Upload Files
+
+Upload one or more files to a thread.
+
+```http
+POST /api/threads/{thread_id}/uploads
+Content-Type: multipart/form-data
+```
+
+**Request Body:**
+- `files`: One or more files to upload
+
+**Response:**
+```json
+{
+  "success": true,
+  "files": [
+    {
+      "filename": "document.pdf",
+      "size": 1234567,
+      "path": ".deer-flow/threads/abc123/user-data/uploads/document.pdf",
+      "virtual_path": "/mnt/user-data/uploads/document.pdf",
+      "artifact_url": "/api/threads/abc123/artifacts/mnt/user-data/uploads/document.pdf",
+      "markdown_file": "document.md",
+      "markdown_path": ".deer-flow/threads/abc123/user-data/uploads/document.md",
+      "markdown_virtual_path": "/mnt/user-data/uploads/document.md",
+      "markdown_artifact_url": "/api/threads/abc123/artifacts/mnt/user-data/uploads/document.md"
+    }
+  ],
+  "message": "Successfully uploaded 1 file(s)"
+}
+```
+
+**Supported Document Formats** (auto-converted to Markdown):
+- PDF (`.pdf`)
+- PowerPoint (`.ppt`, `.pptx`)
+- Excel (`.xls`, `.xlsx`)
+- Word (`.doc`, `.docx`)
+
+#### List Uploaded Files
+
+```http
+GET /api/threads/{thread_id}/uploads/list
+```
+
+**Response:**
+```json
+{
+  "files": [
+    {
+      "filename": "document.pdf",
+      "size": 1234567,
+      "path": ".deer-flow/threads/abc123/user-data/uploads/document.pdf",
+      "virtual_path": "/mnt/user-data/uploads/document.pdf",
+      "artifact_url": "/api/threads/abc123/artifacts/mnt/user-data/uploads/document.pdf",
+      "extension": ".pdf",
+      "modified": 1705997600.0
+    }
+  ],
+  "count": 1
+}
+```
+
+#### Delete File
+
+```http
+DELETE /api/threads/{thread_id}/uploads/{filename}
+```
+
+**Response:**
+```json
+{
+  "success": true,
+  "message": "Deleted document.pdf"
+}
+```
+
+### Thread Cleanup
+
+Remove DeerFlow-managed local thread files under `.deer-flow/threads/{thread_id}` after the LangGraph thread itself has been deleted.
+
+```http
+DELETE /api/threads/{thread_id}
+```
+
+**Response:**
+```json
+{
+  "success": true,
+  "message": "Deleted local thread data for abc123"
+}
+```
+
+**Error behavior:**
+- `422` for invalid thread IDs
+- `500` returns a generic `{"detail": "Failed to delete local thread data."}` response while full exception details stay in server logs
+
+### Artifacts
+
+#### Get Artifact
+
+Download or view an artifact generated by the agent.
+
+```http
+GET /api/threads/{thread_id}/artifacts/{path}
+```
+
+**Path Examples:**
+- `/api/threads/abc123/artifacts/mnt/user-data/outputs/result.txt`
+- `/api/threads/abc123/artifacts/mnt/user-data/uploads/document.pdf`
+
+**Query Parameters:**
+- `download` (boolean): If `true`, force download with Content-Disposition header
+
+**Response:** File content with appropriate Content-Type
+
+---
+
+## Error Responses
+
+All APIs return errors in a consistent format:
+
+```json
+{
+  "detail": "Error message describing what went wrong"
+}
+```
+
+**HTTP Status Codes:**
+- `400` - Bad Request: Invalid input
+- `404` - Not Found: Resource not found
+- `422` - Validation Error: Request validation failed
+- `500` - Internal Server Error: Server-side error
+
+---
+
+## Authentication
+
+Currently, DeerFlow does not implement authentication. All APIs are accessible without credentials.
+
+Note: This is about DeerFlow API authentication. MCP outbound connections can still use OAuth for configured HTTP/SSE MCP servers.
+
+For production deployments, it is recommended to:
+1. Use Nginx for basic auth or OAuth integration
+2. Deploy behind a VPN or private network
+3. Implement custom authentication middleware
+
+---
+
+## Rate Limiting
+
+No rate limiting is implemented by default. For production deployments, configure rate limiting in Nginx:
+
+```nginx
+limit_req_zone $binary_remote_addr zone=api:10m rate=10r/s;
+
+location /api/ {
+    limit_req zone=api burst=20 nodelay;
+    proxy_pass http://backend;
+}
+```
+
+---
+
+## WebSocket Support
+
+The LangGraph server supports WebSocket connections for real-time streaming. Connect to:
+
+```
+ws://localhost:2026/api/langgraph/threads/{thread_id}/runs/stream
+```
+
+---
+
+## SDK Usage
+
+### Python (LangGraph SDK)
+
+```python
+from langgraph_sdk import get_client
+
+client = get_client(url="http://localhost:2026/api/langgraph")
+
+# Create thread
+thread = await client.threads.create()
+
+# Run agent
+async for event in client.runs.stream(
+    thread["thread_id"],
+    "lead_agent",
+    input={"messages": [{"role": "user", "content": "Hello"}]},
+    config={"configurable": {"model_name": "gpt-4"}},
+    stream_mode=["values", "messages-tuple", "custom"],
+):
+    print(event)
+```
+
+### JavaScript/TypeScript
+
+```typescript
+// Using fetch for Gateway API
+const response = await fetch('/api/models');
+const data = await response.json();
+console.log(data.models);
+
+// Using EventSource for streaming
+const eventSource = new EventSource(
+  `/api/langgraph/threads/${threadId}/runs/stream`
+);
+eventSource.onmessage = (event) => {
+  console.log(JSON.parse(event.data));
+};
+```
+
+### cURL Examples
+
+```bash
+# List models
+curl http://localhost:2026/api/models
+
+# Get MCP config
+curl http://localhost:2026/api/mcp/config
+
+# Upload file
+curl -X POST http://localhost:2026/api/threads/abc123/uploads \
+  -F "files=@document.pdf"
+
+# Enable skill
+curl -X POST http://localhost:2026/api/skills/pdf-processing/enable
+
+# Create thread and run agent
+curl -X POST http://localhost:2026/api/langgraph/threads \
+  -H "Content-Type: application/json" \
+  -d '{}'
+
+curl -X POST http://localhost:2026/api/langgraph/threads/abc123/runs \
+  -H "Content-Type: application/json" \
+  -d '{
+    "input": {"messages": [{"role": "user", "content": "Hello"}]},
+    "config": {"configurable": {"model_name": "gpt-4"}}
+  }'
+```

backend/docs/APPLE_CONTAINER.md

@@ -0,0 +1,238 @@
+# Apple Container Support
+
+DeerFlow now supports Apple Container as the preferred container runtime on macOS, with automatic fallback to Docker.
+
+## Overview
+
+Starting with this version, DeerFlow automatically detects and uses Apple Container on macOS when available, falling back to Docker when:
+- Apple Container is not installed
+- Running on non-macOS platforms
+
+This provides better performance on Apple Silicon Macs while maintaining compatibility across all platforms.
+
+## Benefits
+
+### On Apple Silicon Macs with Apple Container:
+- **Better Performance**: Native ARM64 execution without Rosetta 2 translation
+- **Lower Resource Usage**: Lighter weight than Docker Desktop
+- **Native Integration**: Uses macOS Virtualization.framework
+
+### Fallback to Docker:
+- Full backward compatibility
+- Works on all platforms (macOS, Linux, Windows)
+- No configuration changes needed
+
+## Requirements
+
+### For Apple Container (macOS only):
+- macOS 15.0 or later
+- Apple Silicon (M1/M2/M3/M4)
+- Apple Container CLI installed
+
+### Installation:
+```bash
+# Download from GitHub releases
+# https://github.com/apple/container/releases
+
+# Verify installation
+container --version
+
+# Start the service
+container system start
+```
+
+### For Docker (all platforms):
+- Docker Desktop or Docker Engine
+
+## How It Works
+
+### Automatic Detection
+
+The `AioSandboxProvider` automatically detects the available container runtime:
+
+1. On macOS: Try `container --version`
+   - Success → Use Apple Container
+   - Failure → Fall back to Docker
+
+2. On other platforms: Use Docker directly
+
+### Runtime Differences
+
+Both runtimes use nearly identical command syntax:
+
+**Container Startup:**
+```bash
+# Apple Container
+container run --rm -d -p 8080:8080 -v /host:/container -e KEY=value image
+
+# Docker
+docker run --rm -d -p 8080:8080 -v /host:/container -e KEY=value image
+```
+
+**Container Cleanup:**
+```bash
+# Apple Container (with --rm flag)
+container stop <id>  # Auto-removes due to --rm
+
+# Docker (with --rm flag)
+docker stop <id>     # Auto-removes due to --rm
+```
+
+### Implementation Details
+
+The implementation is in `backend/packages/harness/deerflow/community/aio_sandbox/aio_sandbox_provider.py`:
+
+- `_detect_container_runtime()`: Detects available runtime at startup
+- `_start_container()`: Uses detected runtime, skips Docker-specific options for Apple Container
+- `_stop_container()`: Uses appropriate stop command for the runtime
+
+## Configuration
+
+No configuration changes are needed! The system works automatically.
+
+However, you can verify the runtime in use by checking the logs:
+
+```
+INFO:deerflow.community.aio_sandbox.aio_sandbox_provider:Detected Apple Container: container version 0.1.0
+INFO:deerflow.community.aio_sandbox.aio_sandbox_provider:Starting sandbox container using container: ...
+```
+
+Or for Docker:
+```
+INFO:deerflow.community.aio_sandbox.aio_sandbox_provider:Apple Container not available, falling back to Docker
+INFO:deerflow.community.aio_sandbox.aio_sandbox_provider:Starting sandbox container using docker: ...
+```
+
+## Container Images
+
+Both runtimes use OCI-compatible images. The default image works with both:
+
+```yaml
+sandbox:
+  use: deerflow.community.aio_sandbox:AioSandboxProvider
+  image: enterprise-public-cn-beijing.cr.volces.com/vefaas-public/all-in-one-sandbox:latest  # Default image
+```
+
+Make sure your images are available for the appropriate architecture:
+- ARM64 for Apple Container on Apple Silicon
+- AMD64 for Docker on Intel Macs
+- Multi-arch images work on both
+
+### Pre-pulling Images (Recommended)
+
+**Important**: Container images are typically large (500MB+) and are pulled on first use, which can cause a long wait time without clear feedback.
+
+**Best Practice**: Pre-pull the image during setup:
+
+```bash
+# From project root
+make setup-sandbox
+```
+
+This command will:
+1. Read the configured image from `config.yaml` (or use default)
+2. Detect available runtime (Apple Container or Docker)
+3. Pull the image with progress indication
+4. Verify the image is ready for use
+
+**Manual pre-pull**:
+
+```bash
+# Using Apple Container
+container image pull enterprise-public-cn-beijing.cr.volces.com/vefaas-public/all-in-one-sandbox:latest
+
+# Using Docker
+docker pull enterprise-public-cn-beijing.cr.volces.com/vefaas-public/all-in-one-sandbox:latest
+```
+
+If you skip pre-pulling, the image will be automatically pulled on first agent execution, which may take several minutes depending on your network speed.
+
+## Cleanup Scripts
+
+The project includes a unified cleanup script that handles both runtimes:
+
+**Script:** `scripts/cleanup-containers.sh`
+
+**Usage:**
+```bash
+# Clean up all DeerFlow sandbox containers
+./scripts/cleanup-containers.sh deer-flow-sandbox
+
+# Custom prefix
+./scripts/cleanup-containers.sh my-prefix
+```
+
+**Makefile Integration:**
+
+All cleanup commands in `Makefile` automatically handle both runtimes:
+```bash
+make stop   # Stops all services and cleans up containers
+make clean  # Full cleanup including logs
+```
+
+## Testing
+
+Test the container runtime detection:
+
+```bash
+cd backend
+python test_container_runtime.py
+```
+
+This will:
+1. Detect the available runtime
+2. Optionally start a test container
+3. Verify connectivity
+4. Clean up
+
+## Troubleshooting
+
+### Apple Container not detected on macOS
+
+1. Check if installed:
+   ```bash
+   which container
+   container --version
+   ```
+
+2. Check if service is running:
+   ```bash
+   container system start
+   ```
+
+3. Check logs for detection:
+   ```bash
+   # Look for detection message in application logs
+   grep "container runtime" logs/*.log
+   ```
+
+### Containers not cleaning up
+
+1. Manually check running containers:
+   ```bash
+   # Apple Container
+   container list
+
+   # Docker
+   docker ps
+   ```
+
+2. Run cleanup script manually:
+   ```bash
+   ./scripts/cleanup-containers.sh deer-flow-sandbox
+   ```
+
+### Performance issues
+
+- Apple Container should be faster on Apple Silicon
+- If experiencing issues, you can force Docker by temporarily renaming the `container` command:
+   ```bash
+   # Temporary workaround - not recommended for permanent use
+   sudo mv /opt/homebrew/bin/container /opt/homebrew/bin/container.bak
+   ```
+
+## References
+
+- [Apple Container GitHub](https://github.com/apple/container)
+- [Apple Container Documentation](https://github.com/apple/container/blob/main/docs/)
+- [OCI Image Spec](https://github.com/opencontainers/image-spec)

backend/docs/ARCHITECTURE.md

@@ -0,0 +1,484 @@
+# Architecture Overview
+
+This document provides a comprehensive overview of the DeerFlow backend architecture.
+
+## System Architecture
+
+```
+┌──────────────────────────────────────────────────────────────────────────┐
+│                              Client (Browser)                             │
+└─────────────────────────────────┬────────────────────────────────────────┘
+                                  │
+                                  ▼
+┌──────────────────────────────────────────────────────────────────────────┐
+│                          Nginx (Port 2026)                               │
+│                    Unified Reverse Proxy Entry Point                      │
+│  ┌────────────────────────────────────────────────────────────────────┐  │
+│  │  /api/langgraph/*  →  LangGraph Server (2024)                      │  │
+│  │  /api/*            →  Gateway API (8001)                           │  │
+│  │  /*                →  Frontend (3000)                               │  │
+│  └────────────────────────────────────────────────────────────────────┘  │
+└─────────────────────────────────┬────────────────────────────────────────┘
+                                  │
+          ┌───────────────────────┼───────────────────────┐
+          │                       │                       │
+          ▼                       ▼                       ▼
+┌─────────────────────┐ ┌─────────────────────┐ ┌─────────────────────┐
+│   LangGraph Server  │ │    Gateway API      │ │     Frontend        │
+│     (Port 2024)     │ │    (Port 8001)      │ │    (Port 3000)      │
+│                     │ │                     │ │                     │
+│  - Agent Runtime    │ │  - Models API       │ │  - Next.js App      │
+│  - Thread Mgmt      │ │  - MCP Config       │ │  - React UI         │
+│  - SSE Streaming    │ │  - Skills Mgmt      │ │  - Chat Interface   │
+│  - Checkpointing    │ │  - File Uploads     │ │                     │
+│                     │ │  - Thread Cleanup   │ │                     │
+│                     │ │  - Artifacts        │ │                     │
+└─────────────────────┘ └─────────────────────┘ └─────────────────────┘
+          │                       │
+          │     ┌─────────────────┘
+          │     │
+          ▼     ▼
+┌──────────────────────────────────────────────────────────────────────────┐
+│                         Shared Configuration                              │
+│  ┌─────────────────────────┐  ┌────────────────────────────────────────┐ │
+│  │      config.yaml        │  │      extensions_config.json            │ │
+│  │  - Models               │  │  - MCP Servers                         │ │
+│  │  - Tools                │  │  - Skills State                        │ │
+│  │  - Sandbox              │  │                                        │ │
+│  │  - Summarization        │  │                                        │ │
+│  └─────────────────────────┘  └────────────────────────────────────────┘ │
+└──────────────────────────────────────────────────────────────────────────┘
+```
+
+## Component Details
+
+### LangGraph Server
+
+The LangGraph server is the core agent runtime, built on LangGraph for robust multi-agent workflow orchestration.
+
+**Entry Point**: `packages/harness/deerflow/agents/lead_agent/agent.py:make_lead_agent`
+
+**Key Responsibilities**:
+- Agent creation and configuration
+- Thread state management
+- Middleware chain execution
+- Tool execution orchestration
+- SSE streaming for real-time responses
+
+**Configuration**: `langgraph.json`
+
+```json
+{
+  "agent": {
+    "type": "agent",
+    "path": "deerflow.agents:make_lead_agent"
+  }
+}
+```
+
+### Gateway API
+
+FastAPI application providing REST endpoints for non-agent operations.
+
+**Entry Point**: `app/gateway/app.py`
+
+**Routers**:
+- `models.py` - `/api/models` - Model listing and details
+- `mcp.py` - `/api/mcp` - MCP server configuration
+- `skills.py` - `/api/skills` - Skills management
+- `uploads.py` - `/api/threads/{id}/uploads` - File upload
+- `threads.py` - `/api/threads/{id}` - Local DeerFlow thread data cleanup after LangGraph deletion
+- `artifacts.py` - `/api/threads/{id}/artifacts` - Artifact serving
+- `suggestions.py` - `/api/threads/{id}/suggestions` - Follow-up suggestion generation
+
+The web conversation delete flow is now split across both backend surfaces: LangGraph handles `DELETE /api/langgraph/threads/{thread_id}` for thread state, then the Gateway `threads.py` router removes DeerFlow-managed filesystem data via `Paths.delete_thread_dir()`.
+
+### Agent Architecture
+
+```
+┌─────────────────────────────────────────────────────────────────────────┐
+│                           make_lead_agent(config)                        │
+└────────────────────────────────────┬────────────────────────────────────┘
+                                     │
+                                     ▼
+┌─────────────────────────────────────────────────────────────────────────┐
+│                            Middleware Chain                              │
+│  ┌──────────────────────────────────────────────────────────────────┐   │
+│  │ 1. ThreadDataMiddleware  - Initialize workspace/uploads/outputs  │   │
+│  │ 2. UploadsMiddleware     - Process uploaded files               │   │
+│  │ 3. SandboxMiddleware     - Acquire sandbox environment          │   │
+│  │ 4. SummarizationMiddleware - Context reduction (if enabled)     │   │
+│  │ 5. TitleMiddleware       - Auto-generate titles                 │   │
+│  │ 6. TodoListMiddleware    - Task tracking (if plan_mode)         │   │
+│  │ 7. ViewImageMiddleware   - Vision model support                 │   │
+│  │ 8. ClarificationMiddleware - Handle clarifications              │   │
+│  └──────────────────────────────────────────────────────────────────┘   │
+└────────────────────────────────────┬────────────────────────────────────┘
+                                     │
+                                     ▼
+┌─────────────────────────────────────────────────────────────────────────┐
+│                              Agent Core                                  │
+│  ┌──────────────────┐  ┌──────────────────┐  ┌──────────────────────┐   │
+│  │      Model       │  │      Tools       │  │    System Prompt     │   │
+│  │  (from factory)  │  │  (configured +   │  │  (with skills)       │   │
+│  │                  │  │   MCP + builtin) │  │                      │   │
+│  └──────────────────┘  └──────────────────┘  └──────────────────────┘   │
+└─────────────────────────────────────────────────────────────────────────┘
+```
+
+### Thread State
+
+The `ThreadState` extends LangGraph's `AgentState` with additional fields:
+
+```python
+class ThreadState(AgentState):
+    # Core state from AgentState
+    messages: list[BaseMessage]
+
+    # DeerFlow extensions
+    sandbox: dict             # Sandbox environment info
+    artifacts: list[str]      # Generated file paths
+    thread_data: dict         # {workspace, uploads, outputs} paths
+    title: str | None         # Auto-generated conversation title
+    todos: list[dict]         # Task tracking (plan mode)
+    viewed_images: dict       # Vision model image data
+```
+
+### Sandbox System
+
+```
+┌─────────────────────────────────────────────────────────────────────────┐
+│                           Sandbox Architecture                           │
+└─────────────────────────────────────────────────────────────────────────┘
+
+                      ┌─────────────────────────┐
+                      │    SandboxProvider      │ (Abstract)
+                      │  - acquire()            │
+                      │  - get()                │
+                      │  - release()            │
+                      └────────────┬────────────┘
+                                   │
+              ┌────────────────────┼────────────────────┐
+              │                                         │
+              ▼                                         ▼
+┌─────────────────────────┐              ┌─────────────────────────┐
+│  LocalSandboxProvider   │              │  AioSandboxProvider     │
+│  (packages/harness/deerflow/sandbox/local.py) │              │  (packages/harness/deerflow/community/)       │
+│                         │              │                         │
+│  - Singleton instance   │              │  - Docker-based         │
+│  - Direct execution     │              │  - Isolated containers  │
+│  - Development use      │              │  - Production use       │
+└─────────────────────────┘              └─────────────────────────┘
+
+                      ┌─────────────────────────┐
+                      │        Sandbox          │ (Abstract)
+                      │  - execute_command()    │
+                      │  - read_file()          │
+                      │  - write_file()         │
+                      │  - list_dir()           │
+                      └─────────────────────────┘
+```
+
+**Virtual Path Mapping**:
+
+| Virtual Path | Physical Path |
+|-------------|---------------|
+| `/mnt/user-data/workspace` | `backend/.deer-flow/threads/{thread_id}/user-data/workspace` |
+| `/mnt/user-data/uploads` | `backend/.deer-flow/threads/{thread_id}/user-data/uploads` |
+| `/mnt/user-data/outputs` | `backend/.deer-flow/threads/{thread_id}/user-data/outputs` |
+| `/mnt/skills` | `deer-flow/skills/` |
+
+### Tool System
+
+```
+┌─────────────────────────────────────────────────────────────────────────┐
+│                            Tool Sources                                  │
+└─────────────────────────────────────────────────────────────────────────┘
+
+┌─────────────────────┐  ┌─────────────────────┐  ┌─────────────────────┐
+│   Built-in Tools    │  │  Configured Tools   │  │     MCP Tools       │
+│  (packages/harness/deerflow/tools/)       │  │  (config.yaml)      │  │  (extensions.json)  │
+├─────────────────────┤  ├─────────────────────┤  ├─────────────────────┤
+│ - present_file      │  │ - web_search        │  │ - github            │
+│ - ask_clarification │  │ - web_fetch         │  │ - filesystem        │
+│ - view_image        │  │ - bash              │  │ - postgres          │
+│                     │  │ - read_file         │  │ - brave-search      │
+│                     │  │ - write_file        │  │ - puppeteer         │
+│                     │  │ - str_replace       │  │ - ...               │
+│                     │  │ - ls                │  │                     │
+└─────────────────────┘  └─────────────────────┘  └─────────────────────┘
+           │                       │                       │
+           └───────────────────────┴───────────────────────┘
+                                   │
+                                   ▼
+                      ┌─────────────────────────┐
+                      │   get_available_tools() │
+                      │   (packages/harness/deerflow/tools/__init__)  │
+                      └─────────────────────────┘
+```
+
+### Model Factory
+
+```
+┌─────────────────────────────────────────────────────────────────────────┐
+│                          Model Factory                                   │
+│                     (packages/harness/deerflow/models/factory.py)                              │
+└─────────────────────────────────────────────────────────────────────────┘
+
+config.yaml:
+┌─────────────────────────────────────────────────────────────────────────┐
+│ models:                                                                  │
+│   - name: gpt-4                                                         │
+│     display_name: GPT-4                                                 │
+│     use: langchain_openai:ChatOpenAI                                    │
+│     model: gpt-4                                                        │
+│     api_key: $OPENAI_API_KEY                                            │
+│     max_tokens: 4096                                                    │
+│     supports_thinking: false                                            │
+│     supports_vision: true                                               │
+└─────────────────────────────────────────────────────────────────────────┘
+                                   │
+                                   ▼
+                      ┌─────────────────────────┐
+                      │   create_chat_model()   │
+                      │  - name: str            │
+                      │  - thinking_enabled     │
+                      └────────────┬────────────┘
+                                   │
+                                   ▼
+                      ┌─────────────────────────┐
+                      │   resolve_class()       │
+                      │  (reflection system)    │
+                      └────────────┬────────────┘
+                                   │
+                                   ▼
+                      ┌─────────────────────────┐
+                      │   BaseChatModel         │
+                      │  (LangChain instance)   │
+                      └─────────────────────────┘
+```
+
+**Supported Providers**:
+- OpenAI (`langchain_openai:ChatOpenAI`)
+- Anthropic (`langchain_anthropic:ChatAnthropic`)
+- DeepSeek (`langchain_deepseek:ChatDeepSeek`)
+- Custom via LangChain integrations
+
+### MCP Integration
+
+```
+┌─────────────────────────────────────────────────────────────────────────┐
+│                          MCP Integration                                 │
+│                        (packages/harness/deerflow/mcp/manager.py)                              │
+└─────────────────────────────────────────────────────────────────────────┘
+
+extensions_config.json:
+┌─────────────────────────────────────────────────────────────────────────┐
+│ {                                                                        │
+│   "mcpServers": {                                                       │
+│     "github": {                                                         │
+│       "enabled": true,                                                  │
+│       "type": "stdio",                                                  │
+│       "command": "npx",                                                 │
+│       "args": ["-y", "@modelcontextprotocol/server-github"],           │
+│       "env": {"GITHUB_TOKEN": "$GITHUB_TOKEN"}                          │
+│     }                                                                   │
+│   }                                                                     │
+│ }                                                                       │
+└─────────────────────────────────────────────────────────────────────────┘
+                                   │
+                                   ▼
+                      ┌─────────────────────────┐
+                      │  MultiServerMCPClient   │
+                      │  (langchain-mcp-adapters)│
+                      └────────────┬────────────┘
+                                   │
+              ┌────────────────────┼────────────────────┐
+              │                    │                    │
+              ▼                    ▼                    ▼
+       ┌───────────┐        ┌───────────┐        ┌───────────┐
+       │  stdio    │        │   SSE     │        │   HTTP    │
+       │ transport │        │ transport │        │ transport │
+       └───────────┘        └───────────┘        └───────────┘
+```
+
+### Skills System
+
+```
+┌─────────────────────────────────────────────────────────────────────────┐
+│                          Skills System                                   │
+│                       (packages/harness/deerflow/skills/loader.py)                             │
+└─────────────────────────────────────────────────────────────────────────┘
+
+Directory Structure:
+┌─────────────────────────────────────────────────────────────────────────┐
+│ skills/                                                                  │
+│ ├── public/                        # Public skills (committed)           │
+│ │   ├── pdf-processing/                                                 │
+│ │   │   └── SKILL.md                                                    │
+│ │   ├── frontend-design/                                                │
+│ │   │   └── SKILL.md                                                    │
+│ │   └── ...                                                             │
+│ └── custom/                        # Custom skills (gitignored)          │
+│     └── user-installed/                                                 │
+│         └── SKILL.md                                                    │
+└─────────────────────────────────────────────────────────────────────────┘
+
+SKILL.md Format:
+┌─────────────────────────────────────────────────────────────────────────┐
+│ ---                                                                      │
+│ name: PDF Processing                                                     │
+│ description: Handle PDF documents efficiently                            │
+│ license: MIT                                                            │
+│ allowed-tools:                                                          │
+│   - read_file                                                           │
+│   - write_file                                                          │
+│   - bash                                                                │
+│ ---                                                                      │
+│                                                                          │
+│ # Skill Instructions                                                     │
+│ Content injected into system prompt...                                   │
+└─────────────────────────────────────────────────────────────────────────┘
+```
+
+### Request Flow
+
+```
+┌─────────────────────────────────────────────────────────────────────────┐
+│                         Request Flow Example                             │
+│                    User sends message to agent                           │
+└─────────────────────────────────────────────────────────────────────────┘
+
+1. Client → Nginx
+   POST /api/langgraph/threads/{thread_id}/runs
+   {"input": {"messages": [{"role": "user", "content": "Hello"}]}}
+
+2. Nginx → LangGraph Server (2024)
+   Proxied to LangGraph server
+
+3. LangGraph Server
+   a. Load/create thread state
+   b. Execute middleware chain:
+      - ThreadDataMiddleware: Set up paths
+      - UploadsMiddleware: Inject file list
+      - SandboxMiddleware: Acquire sandbox
+      - SummarizationMiddleware: Check token limits
+      - TitleMiddleware: Generate title if needed
+      - TodoListMiddleware: Load todos (if plan mode)
+      - ViewImageMiddleware: Process images
+      - ClarificationMiddleware: Check for clarifications
+
+   c. Execute agent:
+      - Model processes messages
+      - May call tools (bash, web_search, etc.)
+      - Tools execute via sandbox
+      - Results added to messages
+
+   d. Stream response via SSE
+
+4. Client receives streaming response
+```
+
+## Data Flow
+
+### File Upload Flow
+
+```
+1. Client uploads file
+   POST /api/threads/{thread_id}/uploads
+   Content-Type: multipart/form-data
+
+2. Gateway receives file
+   - Validates file
+   - Stores in .deer-flow/threads/{thread_id}/user-data/uploads/
+   - If document: converts to Markdown via markitdown
+
+3. Returns response
+   {
+     "files": [{
+       "filename": "doc.pdf",
+       "path": ".deer-flow/.../uploads/doc.pdf",
+       "virtual_path": "/mnt/user-data/uploads/doc.pdf",
+       "artifact_url": "/api/threads/.../artifacts/mnt/.../doc.pdf"
+     }]
+   }
+
+4. Next agent run
+   - UploadsMiddleware lists files
+   - Injects file list into messages
+   - Agent can access via virtual_path
+```
+
+### Thread Cleanup Flow
+
+```
+1. Client deletes conversation via LangGraph
+   DELETE /api/langgraph/threads/{thread_id}
+
+2. Web UI follows up with Gateway cleanup
+   DELETE /api/threads/{thread_id}
+
+3. Gateway removes local DeerFlow-managed files
+   - Deletes .deer-flow/threads/{thread_id}/ recursively
+   - Missing directories are treated as a no-op
+   - Invalid thread IDs are rejected before filesystem access
+```
+
+### Configuration Reload
+
+```
+1. Client updates MCP config
+   PUT /api/mcp/config
+
+2. Gateway writes extensions_config.json
+   - Updates mcpServers section
+   - File mtime changes
+
+3. MCP Manager detects change
+   - get_cached_mcp_tools() checks mtime
+   - If changed: reinitializes MCP client
+   - Loads updated server configurations
+
+4. Next agent run uses new tools
+```
+
+## Security Considerations
+
+### Sandbox Isolation
+
+- Agent code executes within sandbox boundaries
+- Local sandbox: Direct execution (development only)
+- Docker sandbox: Container isolation (production recommended)
+- Path traversal prevention in file operations
+
+### API Security
+
+- Thread isolation: Each thread has separate data directories
+- File validation: Uploads checked for path safety
+- Environment variable resolution: Secrets not stored in config
+
+### MCP Security
+
+- Each MCP server runs in its own process
+- Environment variables resolved at runtime
+- Servers can be enabled/disabled independently
+
+## Performance Considerations
+
+### Caching
+
+- MCP tools cached with file mtime invalidation
+- Configuration loaded once, reloaded on file change
+- Skills parsed once at startup, cached in memory
+
+### Streaming
+
+- SSE used for real-time response streaming
+- Reduces time to first token
+- Enables progress visibility for long operations
+
+### Context Management
+
+- Summarization middleware reduces context when limits approached
+- Configurable triggers: tokens, messages, or fraction
+- Preserves recent messages while summarizing older ones

backend/docs/AUTH_UPGRADE.md

@@ -0,0 +1,129 @@
+# Authentication Upgrade Guide
+
+DeerFlow 内置了认证模块。本文档面向从无认证版本升级的用户。
+
+## 核心概念
+
+认证模块采用**始终强制**策略：
+
+- 首次启动时自动创建 admin 账号，随机密码打印到控制台日志
+- 认证从一开始就是强制的，无竞争窗口
+- 历史对话（升级前创建的 thread）自动迁移到 admin 名下
+
+## 升级步骤
+
+### 1. 更新代码
+
+```bash
+git pull origin main
+cd backend && make install
+```
+
+### 2. 首次启动
+
+```bash
+make dev
+```
+
+控制台会输出：
+
+```
+============================================================
+  Admin account created on first boot
+  Email:    admin@deerflow.dev
+  Password: aB3xK9mN_pQ7rT2w
+  Change it after login: Settings → Account
+============================================================
+```
+
+如果未登录就重启了服务，不用担心——只要 setup 未完成，每次启动都会重置密码并重新打印到控制台。
+
+### 3. 登录
+
+访问 `http://localhost:2026/login`，使用控制台输出的邮箱和密码登录。
+
+### 4. 修改密码
+
+登录后进入 Settings → Account → Change Password。
+
+### 5. 添加用户（可选）
+
+其他用户通过 `/login` 页面注册，自动获得 **user** 角色。每个用户只能看到自己的对话。
+
+## 安全机制
+
+| 机制 | 说明 |
+|------|------|
+| JWT HttpOnly Cookie | Token 不暴露给 JavaScript，防止 XSS 窃取 |
+| CSRF Double Submit Cookie | 所有 POST/PUT/DELETE 请求需携带 `X-CSRF-Token` |
+| bcrypt 密码哈希 | 密码不以明文存储 |
+| 多租户隔离 | 用户只能访问自己的 thread |
+| HTTPS 自适应 | 检测 `x-forwarded-proto`，自动设置 `Secure` cookie 标志 |
+
+## 常见操作
+
+### 忘记密码
+
+```bash
+cd backend
+
+# 重置 admin 密码
+python -m app.gateway.auth.reset_admin
+
+# 重置指定用户密码
+python -m app.gateway.auth.reset_admin --email user@example.com
+```
+
+会输出新的随机密码。
+
+### 完全重置
+
+删除用户数据库，重启后自动创建新 admin：
+
+```bash
+rm -f backend/.deer-flow/users.db
+# 重启服务，控制台输出新密码
+```
+
+## 数据存储
+
+| 文件 | 内容 |
+|------|------|
+| `.deer-flow/users.db` | SQLite 用户数据库（密码哈希、角色） |
+| `.env` 中的 `AUTH_JWT_SECRET` | JWT 签名密钥（未设置时自动生成临时密钥，重启后 session 失效） |
+
+### 生产环境建议
+
+```bash
+# 生成持久化 JWT 密钥，避免重启后所有用户需重新登录
+python -c "import secrets; print(secrets.token_urlsafe(32))"
+# 将输出添加到 .env：
+# AUTH_JWT_SECRET=<生成的密钥>
+```
+
+## API 端点
+
+| 端点 | 方法 | 说明 |
+|------|------|------|
+| `/api/v1/auth/login/local` | POST | 邮箱密码登录（OAuth2 form） |
+| `/api/v1/auth/register` | POST | 注册新用户（user 角色） |
+| `/api/v1/auth/logout` | POST | 登出（清除 cookie） |
+| `/api/v1/auth/me` | GET | 获取当前用户信息 |
+| `/api/v1/auth/change-password` | POST | 修改密码 |
+| `/api/v1/auth/setup-status` | GET | 检查 admin 是否存在 |
+
+## 兼容性
+
+- **标准模式**（`make dev`）：完全兼容，admin 自动创建
+- **Gateway 模式**（`make dev-pro`）：完全兼容
+- **Docker 部署**：完全兼容，`.deer-flow/users.db` 需持久化卷挂载
+- **IM 渠道**（Feishu/Slack/Telegram）：通过 LangGraph SDK 通信，不经过认证层
+- **DeerFlowClient**（嵌入式）：不经过 HTTP，不受认证影响
+
+## 故障排查
+
+| 症状 | 原因 | 解决 |
+|------|------|------|
+| 启动后没看到密码 | admin 已存在（非首次启动） | 用 `reset_admin` 重置，或删 `users.db` |
+| 登录后 POST 返回 403 | CSRF token 缺失 | 确认前端已更新 |
+| 重启后需要重新登录 | `AUTH_JWT_SECRET` 未持久化 | 在 `.env` 中设置固定密钥 |