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import { Callout, Cards } from "nextra/components";
# DeerFlow App
<Callout type="info" emoji="🚀">
DeerFlow App is a complete Super Agent application built on top of DeerFlow
Harness. It packages the runtime capabilities into a ready-to-deploy product
with a web UI, API gateway, and operational tooling.
</Callout>
DeerFlow App is the reference implementation of what a production DeerFlow experience looks like. It assembles the Harness runtime, a web-based conversation workspace, an API gateway, and a reverse proxy into a single deployable system.
## What the App provides
| Capability | Description |
|---|---|
| **Web workspace** | Browser-based conversation UI with support for threads, artifacts, file uploads, and skill selection |
| **Custom agents** | Create and manage named agents with different models, skills, and tool sets |
| **Thread management** | Persistent conversation threads with checkpointing and history |
| **Streaming responses** | Real-time token streaming with thinking steps and tool call visibility |
| **Artifact viewer** | In-browser preview and download of files and outputs produced by the agent |
| **Extensions UI** | Enable/disable MCP servers and skills without editing config files |
| **Gateway API** | FastAPI-based REST API that bridges the frontend and the LangGraph runtime |
## Architecture
The DeerFlow App runs as four services behind a single nginx reverse proxy:
```
┌──────────────────┐
Browser → │ nginx :2026 │
└──────────────────┘
│ │
┌────────┘ └────────┐
▼ ▼
┌──────────────────┐ ┌──────────────────────┐
│ Frontend :3000 │ │ Gateway API :8001 │
│ (Next.js) │ │ (FastAPI) │
└──────────────────┘ └──────────────────────┘
┌─────────┘
┌──────────────────────┐
│ LangGraph :2024 │
│ (DeerFlow Harness) │
└──────────────────────┘
```
- **nginx**: routes requests — `/api/*` to the Gateway, LangGraph streaming endpoints to LangGraph directly, and everything else to the frontend.
- **Frontend** (Next.js + React): the browser UI. Communicates with both the Gateway and LangGraph.
- **Gateway** (FastAPI): handles API operations — model listing, agent CRUD, memory, extensions management, file uploads.
- **LangGraph**: the DeerFlow Harness runtime. Manages thread state, agent execution, and streaming.
## Technology stack
| Layer | Technology |
|---|---|
| Frontend | Next.js 16, React 19, TypeScript, pnpm |
| Gateway | FastAPI, Python 3.12, uvicorn |
| Agent runtime | LangGraph, LangChain, DeerFlow Harness |
| Reverse proxy | nginx |
| State persistence | LangGraph Server (default) + optional SQLite/PostgreSQL checkpointer |
<Cards num={2}>
<Cards.Card title="Quick Start" href="/docs/application/quick-start" />
<Cards.Card title="Deployment Guide" href="/docs/application/deployment-guide" />
</Cards>