From 6ac7be7c8e2dacfb545241f1516b8819d1581d51 Mon Sep 17 00:00:00 2001
From: Willem Jiang <willem.jiang@gmail.com>
Date: Mon, 15 Jun 2026 19:08:13 +0800
Subject: [PATCH] Added CHANGELOG to the release branch

---
 CHANGELOG.md    | 326 ++++++++++++++++++++++++++++++++++++++++++++++++
 CHANGELOG_zh.md | 301 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 627 insertions(+)
 create mode 100644 CHANGELOG.md
 create mode 100644 CHANGELOG_zh.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
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--- /dev/null
+++ b/CHANGELOG.md
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+# Changelog
+
+All notable changes to DeerFlow are documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [2.0.0] — 2026-06-15
+
+DeerFlow 2.0 is a ground-up rewrite around a "super agent" harness with
+sub-agents, persistent memory, sandbox execution, and an extensible
+skills/tools system. It shares no code with the 1.x line, which now lives on
+the [`main-1.x` branch](https://github.com/bytedance/deer-flow/tree/main-1.x).
+
+This release closes [milestone 2.0.0](https://github.com/bytedance/deer-flow/milestone/1)
+with **102 merged pull requests** since the first 2.0 milestone tag.
+
+### ⚠ Breaking changes
+
+- **harness:** Hydrate runs from `RunStore` and persist interrupted status. Run
+  cancellation/multitask semantics now require a working RunStore on the
+  worker that owns the run; cross-worker cancels return 409 instead of
+  silently appearing successful. ([#2932])
+
+### Added
+
+#### Agents & runtime
+- **agent:** Custom-agent self-updates with user isolation — agents can persist
+  edits to their own `SOUL.md` / `config.yaml` from inside a normal chat.
+  ([#2713])
+- **loop-detection:** Make loop detection configurable with per-tool frequency
+  overrides; keep configurable on/off switch. ([#2586], [#2711])
+- **loop-detection:** Defer warning injection so detector pairs cleanly with
+  tool-call lifecycle. ([#2752])
+- **run:** Propagate `model_name` from the gateway request through the runtime
+  and persistence stack into the SQLite-backed store. ([#2775])
+- **subagents:** Stream subagent token usage to the header via terminal task
+  events. ([#2882])
+
+#### Models & integrations
+- **models:** Add StepFun reasoning model adapter. ([#3461])
+- **community:** Add Brave Search web search tool. ([#3528])
+- **channels:** Enhance Discord with mention-only mode, thread routing, and
+  typing indicators. ([#2842])
+- **im:** Add user-owned IM channel connections — users can bind their own
+  Slack/Telegram/Discord/Feishu/DingTalk/WeChat/WeCom accounts on top of the
+  operator-configured bots. ([#3487])
+
+#### Observability
+- **trace:** Set the LangGraph trace name to `lead_agent` (or the custom
+  agent's `agent_name`) for cleaner Langfuse/LangSmith traces. ([#3101])
+- **frontend:** Refine token usage display modes. ([#2329])
+- **defaults:** Enable token usage tracking by default. ([#2841])
+- **defaults:** Raise default summarization trigger threshold. ([#3174])
+
+### Performance
+
+- **harness:** Push thread metadata filters into SQL instead of post-filtering
+  in Python. ([#2865])
+- **runtime:** Index runs by `thread_id` to avoid O(n) scans in `RunManager`.
+  ([#3499])
+- **runtime:** Index messages in `MemoryRunEventStore` to avoid O(n) scans.
+  ([#3531])
+
+### Security
+
+- **upload:** Reject symlinked upload destinations. ([#2623])
+- **uploads:** Add Windows support for safe symlink-protected uploads.
+  ([#2794])
+- **mcp:** Mask sensitive values in MCP config API responses. ([#2667])
+- **mcp:** Harden the MCP config endpoint against malformed input. ([#3425])
+- **auth:** Reject cross-site auth POSTs. ([#2740])
+- **gateway:** Cap skill artifact preview decompression to prevent
+  zip-bomb-style abuse. ([#2963])
+
+### Fixed
+
+#### Runtime, gateway & persistence
+- **runtime:** Rollback restore checkpoint now supersedes newer checkpoints.
+  ([#2582])
+- **runtime:** Persist run message summaries. ([#2850])
+- **runtime:** Bound `write_file` execution-failure observations to keep
+  failure traces from blowing out the context. ([#3133])
+- **runtime:** Protect the sync singleton's init and reset paths. ([#3413])
+- **runtime:** Avoid PostgreSQL aggregate `FOR UPDATE` on run events.
+  ([#2962])
+- **runs:** Restore historical runs from persistent store after a gateway
+  restart. ([#2989])
+- **gateway:** Return ISO 8601 timestamps from threads endpoints. ([#2599])
+- **gateway:** Make cancel idempotent for already-interrupted runs. ([#3058])
+- **gateway:** Split `stream_existing_run` into per-method routes for unique
+  OpenAPI `operationId`s. ([#3228])
+- **events:** Serialize structured DB event content. ([#2762])
+- **persistence:** Emit timezone-aware timestamps from SQLite-backed stores.
+  ([#3130])
+- **persistence:** Reuse token usage model grouping expression. ([#2910])
+- **runs:** Ignore stale run reconnect conflicts. ([#3284])
+- **nginx:** Defer CORS to the gateway allowlist instead of double-applying it.
+  ([#2861])
+
+#### Agents, subagents & middleware
+- **subagents:** Make subagent timeout terminal state atomic. ([#2583])
+- **subagents:** Use model override for tools and middleware. ([#2641])
+- **subagents:** Consolidate `system_prompt` and skills into a single
+  `SystemMessage`. ([#2701])
+- **subagent:** Isolate subagents from the parent run's checkpointer.
+  ([#3559])
+- **agents:** Make `update_agent` honor `runtime.context` `user_id` like
+  `setup_agent` does. ([#2867])
+- **agents:** Resolve duplicate `todos` channel type conflict in
+  `TodoMiddleware`. ([#3200])
+- **agents:** Offload blocking filesystem IO in the custom-agent router off
+  the event loop. ([#3457])
+- **agents:** Keep new agent bootstrap in user scope. ([#2784])
+- **loop-detection:** Keep tool-call pairing on warn injection. ([#2725])
+- **middleware:** Sync raw tool-call metadata. ([#2757])
+- **middleware:** Handle invalid tool calls in dangling pairing middleware.
+  ([#2891])
+- **middleware:** Prevent todo completion reminder IM-message leak. ([#2907])
+- **middleware:** Normalize tool result adjacency before model calls.
+  ([#2939])
+
+#### Memory & tracing
+- **memory:** Replace short-lived `asyncio.run()` with a persistent event
+  loop. ([#2627])
+- **memory:** Isolate queued memory updates by agent. ([#2941])
+- **memory:** Parse wrapped memory-update JSON responses. ([#3252])
+- **tracing:** Propagate `session_id` and `user_id` into Langfuse traces.
+  ([#2944])
+- **trace:** Decode unicode escape sequences in non-ASCII memory trace info.
+  ([#3104])
+
+#### Tools, sandbox & MCP
+- **mcp:** Fix env resolution in MCP config lists. ([#2556])
+- **models:** Record Codex token usage in `usage_metadata`. ([#2585])
+- **sandbox:** Supplement `list_running` in `RemoteSandboxBackend`. ([#2716])
+- **sandbox:** Disable MSYS path conversion for Git Bash on Windows.
+  ([#2766])
+- **sandbox:** Avoid blocking sandbox readiness polling. ([#2822])
+- **sandbox:** Uphold the `/mnt/user-data` contract at the `Sandbox` API
+  boundary. ([#2881])
+- **sandbox:** Scope provisioner PVC data by user. ([#2973])
+- **sandbox:** Merge idempotent sandbox state updates. ([#3518])
+- **tools:** Introduce `Runtime` type alias to eliminate Pydantic serialization
+  warnings. ([#2774])
+- **tools:** Preserve `tool_search` promotions across re-entrant
+  `get_available_tools`. ([#2885])
+- **harness:** Wrap async-only config tools for sync client execution.
+  ([#2878])
+- **harness:** Wrap all async-only tools for sync clients. ([#2935])
+
+#### Skills & channels
+- **skills:** Enforce `allowed-tools` metadata. ([#2626])
+- **skills:** Harden slash skill activation across chat channels. ([#3466])
+- **skills:** Fix custom skill install permissions. ([#3241])
+- **channels:** Authenticate gateway command requests. ([#2742])
+
+#### Auth
+- **auth:** Replace setup-status 429 rate limit with a cached response.
+  ([#2915])
+- **auth:** Persist auto-generated JWT secret so it survives restarts.
+  ([#2933])
+
+#### Frontend
+- **frontend:** Restore `localhost` fallback for `getGatewayConfig` in prod
+  mode. ([#2718])
+- **chat:** Prevent the first user message from being swallowed in new
+  conversations. ([#2731])
+- **frontend:** Use backend thread token usage for the header total. ([#2800])
+- **frontend:** Wait for async chat submit before clearing the input.
+  ([#2940])
+- **frontend:** Resolve login page flickering and the resize-observer loop.
+  ([#2954])
+- **frontend:** Deduplicate restored thread messages. ([#2958])
+- **frontend:** Avoid duplicate optimistic user message. ([#3002])
+- **frontend:** Hide the copy button for streaming assistant messages.
+  ([#3176])
+- **frontend:** Show a new thread in the sidebar immediately on creation.
+  ([#3283])
+- **frontend:** Isolate new chat thread messages. ([#3508])
+- **frontend:** Cap deeply nested list indentation to prevent render crashes.
+  ([#3393], [#3570])
+- **token-usage:** Dedupe token usage aggregation by message id. ([#2770])
+
+#### Build, deploy, scripts & config
+- **packaging:** Add `postgres` extra for store/checkpointer support; clarify
+  install guidance. ([#2584])
+- **harness:** Resolve runtime paths from the project root. ([#2642])
+- **docker:** Force nginx to resolve upstream names at request time.
+  ([#2717])
+- **docker:** Default Gateway to a single worker to prevent multi-worker
+  breakage. ([#3475])
+- **scripts:** Preserve `uv` extras across `make dev` restarts. ([#2767],
+  [#2754])
+- **scripts:** Clean up local nginx on stop. ([#3005])
+- **deploy:** Fall back to `python` / `openssl` when `python3` is absent for
+  secret generation. ([#3074])
+- **config:** Make the reload boundary discoverable from code. ([#3144],
+  [#3153])
+- **replay-e2e:** Key replay fixtures by caller and conversation. ([#3453])
+
+### Changed
+
+- **provider (refactor):** Share assistant payload replay matching across
+  providers. ([#3307])
+
+### Documentation
+
+- Document blocking-IO detection usage and maintenance. ([#3233])
+- Clean standalone LangGraph server remnants from docs. ([#3301])
+
+### Internal
+
+- **dev:** Add async/thread boundary detector. ([#2936])
+- **runtime:** Add lifecycle end-to-end coverage. ([#2946])
+- **windows:** Add `PYTHONIOENCODING` and `PYTHONUTF8` to backend Makefile
+  targets. ([#3069])
+- **blocking-io:** Fail-loud repo-root resolution and shared detector CLI
+  shim. ([#3512])
+
+[2.0.0]: https://github.com/bytedance/deer-flow/releases/tag/v2.0.0
+[#2329]: https://github.com/bytedance/deer-flow/pull/2329
+[#2556]: https://github.com/bytedance/deer-flow/pull/2556
+[#2582]: https://github.com/bytedance/deer-flow/pull/2582
+[#2583]: https://github.com/bytedance/deer-flow/pull/2583
+[#2584]: https://github.com/bytedance/deer-flow/pull/2584
+[#2585]: https://github.com/bytedance/deer-flow/pull/2585
+[#2586]: https://github.com/bytedance/deer-flow/pull/2586
+[#2599]: https://github.com/bytedance/deer-flow/pull/2599
+[#2623]: https://github.com/bytedance/deer-flow/pull/2623
+[#2626]: https://github.com/bytedance/deer-flow/pull/2626
+[#2627]: https://github.com/bytedance/deer-flow/pull/2627
+[#2641]: https://github.com/bytedance/deer-flow/pull/2641
+[#2642]: https://github.com/bytedance/deer-flow/pull/2642
+[#2667]: https://github.com/bytedance/deer-flow/pull/2667
+[#2701]: https://github.com/bytedance/deer-flow/pull/2701
+[#2711]: https://github.com/bytedance/deer-flow/pull/2711
+[#2713]: https://github.com/bytedance/deer-flow/pull/2713
+[#2716]: https://github.com/bytedance/deer-flow/pull/2716
+[#2717]: https://github.com/bytedance/deer-flow/pull/2717
+[#2718]: https://github.com/bytedance/deer-flow/pull/2718
+[#2725]: https://github.com/bytedance/deer-flow/pull/2725
+[#2731]: https://github.com/bytedance/deer-flow/pull/2731
+[#2740]: https://github.com/bytedance/deer-flow/pull/2740
+[#2742]: https://github.com/bytedance/deer-flow/pull/2742
+[#2752]: https://github.com/bytedance/deer-flow/pull/2752
+[#2754]: https://github.com/bytedance/deer-flow/pull/2754
+[#2757]: https://github.com/bytedance/deer-flow/pull/2757
+[#2762]: https://github.com/bytedance/deer-flow/pull/2762
+[#2766]: https://github.com/bytedance/deer-flow/pull/2766
+[#2767]: https://github.com/bytedance/deer-flow/pull/2767
+[#2770]: https://github.com/bytedance/deer-flow/pull/2770
+[#2774]: https://github.com/bytedance/deer-flow/pull/2774
+[#2775]: https://github.com/bytedance/deer-flow/pull/2775
+[#2784]: https://github.com/bytedance/deer-flow/pull/2784
+[#2794]: https://github.com/bytedance/deer-flow/pull/2794
+[#2800]: https://github.com/bytedance/deer-flow/pull/2800
+[#2822]: https://github.com/bytedance/deer-flow/pull/2822
+[#2841]: https://github.com/bytedance/deer-flow/pull/2841
+[#2842]: https://github.com/bytedance/deer-flow/pull/2842
+[#2850]: https://github.com/bytedance/deer-flow/pull/2850
+[#2861]: https://github.com/bytedance/deer-flow/pull/2861
+[#2865]: https://github.com/bytedance/deer-flow/pull/2865
+[#2867]: https://github.com/bytedance/deer-flow/pull/2867
+[#2878]: https://github.com/bytedance/deer-flow/pull/2878
+[#2881]: https://github.com/bytedance/deer-flow/pull/2881
+[#2882]: https://github.com/bytedance/deer-flow/pull/2882
+[#2885]: https://github.com/bytedance/deer-flow/pull/2885
+[#2891]: https://github.com/bytedance/deer-flow/pull/2891
+[#2907]: https://github.com/bytedance/deer-flow/pull/2907
+[#2910]: https://github.com/bytedance/deer-flow/pull/2910
+[#2915]: https://github.com/bytedance/deer-flow/pull/2915
+[#2932]: https://github.com/bytedance/deer-flow/pull/2932
+[#2933]: https://github.com/bytedance/deer-flow/pull/2933
+[#2935]: https://github.com/bytedance/deer-flow/pull/2935
+[#2936]: https://github.com/bytedance/deer-flow/pull/2936
+[#2939]: https://github.com/bytedance/deer-flow/pull/2939
+[#2940]: https://github.com/bytedance/deer-flow/pull/2940
+[#2941]: https://github.com/bytedance/deer-flow/pull/2941
+[#2944]: https://github.com/bytedance/deer-flow/pull/2944
+[#2946]: https://github.com/bytedance/deer-flow/pull/2946
+[#2954]: https://github.com/bytedance/deer-flow/pull/2954
+[#2958]: https://github.com/bytedance/deer-flow/pull/2958
+[#2962]: https://github.com/bytedance/deer-flow/pull/2962
+[#2963]: https://github.com/bytedance/deer-flow/pull/2963
+[#2973]: https://github.com/bytedance/deer-flow/pull/2973
+[#2989]: https://github.com/bytedance/deer-flow/pull/2989
+[#3002]: https://github.com/bytedance/deer-flow/pull/3002
+[#3005]: https://github.com/bytedance/deer-flow/pull/3005
+[#3058]: https://github.com/bytedance/deer-flow/pull/3058
+[#3069]: https://github.com/bytedance/deer-flow/pull/3069
+[#3074]: https://github.com/bytedance/deer-flow/pull/3074
+[#3101]: https://github.com/bytedance/deer-flow/pull/3101
+[#3104]: https://github.com/bytedance/deer-flow/pull/3104
+[#3130]: https://github.com/bytedance/deer-flow/pull/3130
+[#3133]: https://github.com/bytedance/deer-flow/pull/3133
+[#3144]: https://github.com/bytedance/deer-flow/pull/3144
+[#3153]: https://github.com/bytedance/deer-flow/pull/3153
+[#3174]: https://github.com/bytedance/deer-flow/pull/3174
+[#3176]: https://github.com/bytedance/deer-flow/pull/3176
+[#3200]: https://github.com/bytedance/deer-flow/pull/3200
+[#3228]: https://github.com/bytedance/deer-flow/pull/3228
+[#3233]: https://github.com/bytedance/deer-flow/pull/3233
+[#3241]: https://github.com/bytedance/deer-flow/pull/3241
+[#3252]: https://github.com/bytedance/deer-flow/pull/3252
+[#3283]: https://github.com/bytedance/deer-flow/pull/3283
+[#3284]: https://github.com/bytedance/deer-flow/pull/3284
+[#3301]: https://github.com/bytedance/deer-flow/pull/3301
+[#3307]: https://github.com/bytedance/deer-flow/pull/3307
+[#3393]: https://github.com/bytedance/deer-flow/pull/3393
+[#3413]: https://github.com/bytedance/deer-flow/pull/3413
+[#3425]: https://github.com/bytedance/deer-flow/pull/3425
+[#3453]: https://github.com/bytedance/deer-flow/pull/3453
+[#3457]: https://github.com/bytedance/deer-flow/pull/3457
+[#3461]: https://github.com/bytedance/deer-flow/pull/3461
+[#3466]: https://github.com/bytedance/deer-flow/pull/3466
+[#3475]: https://github.com/bytedance/deer-flow/pull/3475
+[#3487]: https://github.com/bytedance/deer-flow/pull/3487
+[#3499]: https://github.com/bytedance/deer-flow/pull/3499
+[#3508]: https://github.com/bytedance/deer-flow/pull/3508
+[#3512]: https://github.com/bytedance/deer-flow/pull/3512
+[#3518]: https://github.com/bytedance/deer-flow/pull/3518
+[#3528]: https://github.com/bytedance/deer-flow/pull/3528
+[#3531]: https://github.com/bytedance/deer-flow/pull/3531
+[#3559]: https://github.com/bytedance/deer-flow/pull/3559
+[#3570]: https://github.com/bytedance/deer-flow/pull/3570
diff --git a/CHANGELOG_zh.md b/CHANGELOG_zh.md
new file mode 100644
index 000000000..7f2c7ee68
--- /dev/null
+++ b/CHANGELOG_zh.md
@@ -0,0 +1,301 @@
+# 更新日志
+
+本文件记录 DeerFlow 的所有重要变更。
+
+格式参考 [Keep a Changelog](https://keepachangelog.com/zh-CN/1.1.0/)，
+版本号遵循 [语义化版本规范](https://semver.org/lang/zh-CN/)。
+
+[English](./CHANGELOG.md) | 中文
+
+## [2.0.0] — 2026-06-15
+
+DeerFlow 2.0 是围绕"超级智能体"框架的彻底重写，核心包含子智能体、持久化记忆、
+沙箱执行以及可扩展的技能（Skill）/工具系统。本版本与 1.x 系列**没有共享代码**，
+原有的 Deep Research 框架仍在
+[`main-1.x` 分支](https://github.com/bytedance/deer-flow/tree/main-1.x)上维护。
+
+本次发布关闭了
+[2.0.0 里程碑](https://github.com/bytedance/deer-flow/milestone/1)，
+自首个 2.0 里程碑标签以来累计合并 **102 个 Pull Request**。
+
+### ⚠ 不兼容变更（Breaking Changes）
+
+- **harness：** 从 `RunStore` 重新加载历史 run，并持久化"已中断（interrupted）"
+  状态。run 的取消 / 多任务调度语义现在要求拥有该 run 的 worker 上具备可用的
+  RunStore；跨 worker 的取消请求将返回 `409`，不再静默"伪成功"。([#2932])
+
+### 新增
+
+#### 智能体与运行时
+- **智能体：** 自定义智能体支持自我更新，并按用户隔离 —— 智能体可在普通对话中
+  持久化对自身 `SOUL.md` / `config.yaml` 的修改。([#2713])
+- **循环检测：** 支持配置开关，并可按工具维度覆盖触发频率。([#2586]、[#2711])
+- **循环检测：** 警告注入延后执行，避免与工具调用生命周期错位。([#2752])
+- **运行：** 将 `model_name` 从 gateway 请求一直透传到运行时与持久化层（SQLite
+  存储）。([#2775])
+- **子智能体：** 通过终态任务事件，把子智能体的 token 用量流式上报到 header。
+  ([#2882])
+
+#### 模型与集成
+- **模型：** 新增 StepFun 推理模型适配器。([#3461])
+- **社区工具：** 新增 Brave Search 网络检索工具。([#3528])
+- **渠道：** Discord 增加"仅响应 mention"模式、话题路由（thread routing）以及
+  正在输入指示。([#2842])
+- **IM：** 新增"用户自有 IM 渠道连接"——用户可以在运营方配置的 bot 之上，绑定
+  自己的 Slack / Telegram / Discord / 飞书 / 钉钉 / 微信 / 企业微信 账号。
+  ([#3487])
+
+#### 可观测性
+- **追踪：** LangGraph 追踪名设置为 `lead_agent`（自定义智能体则使用其
+  `agent_name`），让 Langfuse / LangSmith 中的 trace 更清晰。([#3101])
+- **前端：** 优化 token 用量的展示模式。([#2329])
+- **默认值：** 默认开启 token 用量统计。([#2841])
+- **默认值：** 提高默认的上下文摘要触发阈值。([#3174])
+
+### 性能优化
+
+- **harness：** 把 thread 元数据过滤下推到 SQL，不再在 Python 侧后过滤。
+  ([#2865])
+- **运行时：** 为 run 增加 `thread_id` 索引，避免 `RunManager` 中的 O(n) 扫描。
+  ([#3499])
+- **运行时：** 为 `MemoryRunEventStore` 中的消息建立索引，避免 O(n) 扫描。
+  ([#3531])
+
+### 安全
+
+- **上传：** 拒绝指向符号链接的上传目标。([#2623])
+- **上传：** 在 Windows 上支持基于符号链接保护的安全上传。([#2794])
+- **MCP：** 在 MCP 配置接口的响应中对敏感字段进行脱敏。([#2667])
+- **MCP：** 加固 MCP 配置接口对异常输入的处理。([#3425])
+- **认证：** 拒绝跨站点（cross-site）的认证 POST 请求。([#2740])
+- **网关：** 限制 skill artifact 预览的解压上限，避免被 zip-bomb 类构造滥用。
+  ([#2963])
+
+### 修复
+
+#### 运行时、网关与持久化
+- **运行时：** rollback 恢复的 checkpoint 现在能够覆盖更新的 checkpoint。
+  ([#2582])
+- **运行时：** 持久化 run 的消息摘要。([#2850])
+- **运行时：** 限制 `write_file` 执行失败时上报的观测信息长度，避免失败 trace
+  撑爆上下文。([#3133])
+- **运行时：** 加锁保护同步单例的初始化与 reset 路径。([#3413])
+- **运行时：** 为 run events 移除 PostgreSQL 上不必要的聚合
+  `FOR UPDATE`。([#2962])
+- **运行：** gateway 重启后从持久化存储中恢复历史 run。([#2989])
+- **网关：** threads 接口返回 ISO 8601 格式的时间戳。([#2599])
+- **网关：** 对已经处于 interrupted 状态的 run，cancel 接口幂等返回。
+  ([#3058])
+- **网关：** 将 `stream_existing_run` 拆分为按 HTTP 方法区分的多个路由，确保
+  OpenAPI `operationId` 唯一。([#3228])
+- **事件：** 序列化结构化的 DB event 内容。([#2762])
+- **持久化：** SQLite 后端的存储统一返回带时区的时间戳。([#3130])
+- **持久化：** 复用 token 用量按模型分组的 SQL 表达式。([#2910])
+- **运行：** 忽略已过期的 run reconnect 冲突。([#3284])
+- **nginx：** 把 CORS 策略下放到 gateway 的 allowlist，避免双重应用。
+  ([#2861])
+
+#### 智能体、子智能体与中间件
+- **子智能体：** 让"子智能体超时"成为原子化的终态。([#2583])
+- **子智能体：** 工具与中间件按 model 覆盖（model override）来构造。([#2641])
+- **子智能体：** 把 `system_prompt` 与 skills 合并到单条 `SystemMessage`。
+  ([#2701])
+- **子智能体：** 子智能体与父 run 的 checkpointer 隔离。([#3559])
+- **智能体：** `update_agent` 与 `setup_agent` 一致，遵循 `runtime.context` 的
+  `user_id`。([#2867])
+- **智能体：** 解决 `TodoMiddleware` 中 `todos` 通道的类型冲突。([#3200])
+- **智能体：** 把自定义智能体路由中的阻塞文件 IO 移出事件循环。([#3457])
+- **智能体：** 新智能体的 bootstrap 流程保持在用户作用域内。([#2784])
+- **循环检测：** 注入 warn 时仍保持 tool-call 配对。([#2725])
+- **中间件：** 同步原始 tool-call 元数据。([#2757])
+- **中间件：** dangling 配对中间件正确处理非法 tool call。([#2891])
+- **中间件：** 防止 todo 完成提醒消息泄漏到 IM 渠道。([#2907])
+- **中间件：** 调用模型前先把 tool result 的相邻关系规范化。([#2939])
+
+#### 记忆与追踪
+- **记忆：** 用常驻事件循环替换短生命周期的 `asyncio.run()`。([#2627])
+- **记忆：** 队列化的 memory 更新按智能体维度隔离。([#2941])
+- **记忆：** 解析被外层包裹的 memory 更新 JSON 响应。([#3252])
+- **追踪：** 把 `session_id` 与 `user_id` 透传到 Langfuse trace。([#2944])
+- **追踪：** 修复中文 memory trace 信息显示为 unicode 转义序列的问题。
+  ([#3104])
+
+#### 工具、沙箱与 MCP
+- **MCP：** 修复 MCP 配置中列表型变量的环境变量解析。([#2556])
+- **模型：** Codex 的 token 用量记录到 `usage_metadata`。([#2585])
+- **沙箱：** 在 `RemoteSandboxBackend` 中补上 `list_running`。([#2716])
+- **沙箱：** Windows / Git Bash 下关闭 MSYS 路径转换。([#2766])
+- **沙箱：** 沙箱就绪轮询不再阻塞事件循环。([#2822])
+- **沙箱：** `Sandbox` API 边界统一遵守 `/mnt/user-data` 契约。([#2881])
+- **沙箱：** Provisioner 的 PVC 数据按用户隔离。([#2973])
+- **沙箱：** 合并幂等的沙箱状态更新。([#3518])
+- **工具：** 引入 `Runtime` 类型别名，消除 Pydantic 序列化告警。([#2774])
+- **工具：** 在重入式 `get_available_tools` 调用之间保留 `tool_search` 的提升
+  状态。([#2885])
+- **harness：** 为同步客户端封装仅异步可用的 config 工具。([#2878])
+- **harness：** 同步客户端可用所有原本仅异步的工具（统一封装）。([#2935])
+
+#### 技能与渠道
+- **技能：** 强制校验 `allowed-tools` 元数据。([#2626])
+- **技能：** 在各聊天渠道下加固 `/skill` 斜杠激活。([#3466])
+- **技能：** 修复自定义 skill 安装时的权限问题。([#3241])
+- **渠道：** Gateway 的命令请求需要鉴权。([#2742])
+
+#### 认证
+- **认证：** 用缓存响应替换 setup-status 接口的 429 限流。([#2915])
+- **认证：** 自动生成的 JWT secret 持久化保存，重启后仍可用。([#2933])
+
+#### 前端
+- **前端：** 在 prod 模式下恢复 `getGatewayConfig` 的 `localhost` 兜底。
+  ([#2718])
+- **聊天：** 修复新会话第一条用户消息被吞掉的问题。([#2731])
+- **前端：** header 总计 token 数采用后端线程级 token 用量。([#2800])
+- **前端：** 异步 chat submit 完成后再清空输入框。([#2940])
+- **前端：** 修复登录页闪烁与 ResizeObserver 死循环。([#2954])
+- **前端：** 对恢复出的会话消息去重。([#2958])
+- **前端：** 避免乐观渲染产生重复的用户消息。([#3002])
+- **前端：** 流式中的 assistant 消息不再展示复制按钮。([#3176])
+- **前端：** 新建 thread 后立即在侧边栏显示。([#3283])
+- **前端：** 新建会话的 thread 消息相互隔离。([#3508])
+- **前端：** 限制深层嵌套列表的缩进，避免渲染崩溃。([#3393]、[#3570])
+- **token 用量：** token 用量按 message id 去重聚合。([#2770])
+
+#### 构建、部署、脚本与配置
+- **打包：** 新增 `postgres` extra 以支持 store / checkpointer，并完善安装
+  说明。([#2584])
+- **harness：** 运行时路径以项目根目录为基准解析。([#2642])
+- **Docker：** 让 nginx 在每次请求时再解析 upstream 名称。([#2717])
+- **Docker：** 把 Gateway 默认改为单 worker，避免多 worker 模式下出现异常。
+  ([#3475])
+- **脚本：** `make dev` 重启时保留 `uv` extras。([#2767]、[#2754])
+- **脚本：** 停止时清理本地 nginx。([#3005])
+- **部署：** 没有 `python3` 时，secret 生成回退到 `python` / `openssl`。
+  ([#3074])
+- **配置：** 让 reload boundary 在代码层面可发现。([#3144]、[#3153])
+- **replay-e2e：** 重放 fixture 按调用方与会话作为 key。([#3453])
+
+### 变更
+
+- **provider（重构）：** 各 provider 间共享 assistant payload 的回放匹配逻辑。
+  ([#3307])
+
+### 文档
+
+- 补充 blocking-IO 检测的使用与维护说明。([#3233])
+- 清理文档中残留的"独立 LangGraph 服务器"相关内容。([#3301])
+
+### 内部改进
+
+- **开发：** 新增 async / thread 边界检测器。([#2936])
+- **运行时：** 增加 lifecycle 端到端测试覆盖。([#2946])
+- **Windows：** 后端 Makefile 各 target 加入 `PYTHONIOENCODING` 与
+  `PYTHONUTF8`。([#3069])
+- **blocking-io：** 检测器以"显式失败（fail-loud）"方式解析仓库根目录，并提供
+  共享 CLI 入口。([#3512])
+
+[2.0.0]: https://github.com/bytedance/deer-flow/releases/tag/v2.0.0
+[#2329]: https://github.com/bytedance/deer-flow/pull/2329
+[#2556]: https://github.com/bytedance/deer-flow/pull/2556
+[#2582]: https://github.com/bytedance/deer-flow/pull/2582
+[#2583]: https://github.com/bytedance/deer-flow/pull/2583
+[#2584]: https://github.com/bytedance/deer-flow/pull/2584
+[#2585]: https://github.com/bytedance/deer-flow/pull/2585
+[#2586]: https://github.com/bytedance/deer-flow/pull/2586
+[#2599]: https://github.com/bytedance/deer-flow/pull/2599
+[#2623]: https://github.com/bytedance/deer-flow/pull/2623
+[#2626]: https://github.com/bytedance/deer-flow/pull/2626
+[#2627]: https://github.com/bytedance/deer-flow/pull/2627
+[#2641]: https://github.com/bytedance/deer-flow/pull/2641
+[#2642]: https://github.com/bytedance/deer-flow/pull/2642
+[#2667]: https://github.com/bytedance/deer-flow/pull/2667
+[#2701]: https://github.com/bytedance/deer-flow/pull/2701
+[#2711]: https://github.com/bytedance/deer-flow/pull/2711
+[#2713]: https://github.com/bytedance/deer-flow/pull/2713
+[#2716]: https://github.com/bytedance/deer-flow/pull/2716
+[#2717]: https://github.com/bytedance/deer-flow/pull/2717
+[#2718]: https://github.com/bytedance/deer-flow/pull/2718
+[#2725]: https://github.com/bytedance/deer-flow/pull/2725
+[#2731]: https://github.com/bytedance/deer-flow/pull/2731
+[#2740]: https://github.com/bytedance/deer-flow/pull/2740
+[#2742]: https://github.com/bytedance/deer-flow/pull/2742
+[#2752]: https://github.com/bytedance/deer-flow/pull/2752
+[#2754]: https://github.com/bytedance/deer-flow/pull/2754
+[#2757]: https://github.com/bytedance/deer-flow/pull/2757
+[#2762]: https://github.com/bytedance/deer-flow/pull/2762
+[#2766]: https://github.com/bytedance/deer-flow/pull/2766
+[#2767]: https://github.com/bytedance/deer-flow/pull/2767
+[#2770]: https://github.com/bytedance/deer-flow/pull/2770
+[#2774]: https://github.com/bytedance/deer-flow/pull/2774
+[#2775]: https://github.com/bytedance/deer-flow/pull/2775
+[#2784]: https://github.com/bytedance/deer-flow/pull/2784
+[#2794]: https://github.com/bytedance/deer-flow/pull/2794
+[#2800]: https://github.com/bytedance/deer-flow/pull/2800
+[#2822]: https://github.com/bytedance/deer-flow/pull/2822
+[#2841]: https://github.com/bytedance/deer-flow/pull/2841
+[#2842]: https://github.com/bytedance/deer-flow/pull/2842
+[#2850]: https://github.com/bytedance/deer-flow/pull/2850
+[#2861]: https://github.com/bytedance/deer-flow/pull/2861
+[#2865]: https://github.com/bytedance/deer-flow/pull/2865
+[#2867]: https://github.com/bytedance/deer-flow/pull/2867
+[#2878]: https://github.com/bytedance/deer-flow/pull/2878
+[#2881]: https://github.com/bytedance/deer-flow/pull/2881
+[#2882]: https://github.com/bytedance/deer-flow/pull/2882
+[#2885]: https://github.com/bytedance/deer-flow/pull/2885
+[#2891]: https://github.com/bytedance/deer-flow/pull/2891
+[#2907]: https://github.com/bytedance/deer-flow/pull/2907
+[#2910]: https://github.com/bytedance/deer-flow/pull/2910
+[#2915]: https://github.com/bytedance/deer-flow/pull/2915
+[#2932]: https://github.com/bytedance/deer-flow/pull/2932
+[#2933]: https://github.com/bytedance/deer-flow/pull/2933
+[#2935]: https://github.com/bytedance/deer-flow/pull/2935
+[#2936]: https://github.com/bytedance/deer-flow/pull/2936
+[#2939]: https://github.com/bytedance/deer-flow/pull/2939
+[#2940]: https://github.com/bytedance/deer-flow/pull/2940
+[#2941]: https://github.com/bytedance/deer-flow/pull/2941
+[#2944]: https://github.com/bytedance/deer-flow/pull/2944
+[#2946]: https://github.com/bytedance/deer-flow/pull/2946
+[#2954]: https://github.com/bytedance/deer-flow/pull/2954
+[#2958]: https://github.com/bytedance/deer-flow/pull/2958
+[#2962]: https://github.com/bytedance/deer-flow/pull/2962
+[#2963]: https://github.com/bytedance/deer-flow/pull/2963
+[#2973]: https://github.com/bytedance/deer-flow/pull/2973
+[#2989]: https://github.com/bytedance/deer-flow/pull/2989
+[#3002]: https://github.com/bytedance/deer-flow/pull/3002
+[#3005]: https://github.com/bytedance/deer-flow/pull/3005
+[#3058]: https://github.com/bytedance/deer-flow/pull/3058
+[#3069]: https://github.com/bytedance/deer-flow/pull/3069
+[#3074]: https://github.com/bytedance/deer-flow/pull/3074
+[#3101]: https://github.com/bytedance/deer-flow/pull/3101
+[#3104]: https://github.com/bytedance/deer-flow/pull/3104
+[#3130]: https://github.com/bytedance/deer-flow/pull/3130
+[#3133]: https://github.com/bytedance/deer-flow/pull/3133
+[#3144]: https://github.com/bytedance/deer-flow/pull/3144
+[#3153]: https://github.com/bytedance/deer-flow/pull/3153
+[#3174]: https://github.com/bytedance/deer-flow/pull/3174
+[#3176]: https://github.com/bytedance/deer-flow/pull/3176
+[#3200]: https://github.com/bytedance/deer-flow/pull/3200
+[#3228]: https://github.com/bytedance/deer-flow/pull/3228
+[#3233]: https://github.com/bytedance/deer-flow/pull/3233
+[#3241]: https://github.com/bytedance/deer-flow/pull/3241
+[#3252]: https://github.com/bytedance/deer-flow/pull/3252
+[#3283]: https://github.com/bytedance/deer-flow/pull/3283
+[#3284]: https://github.com/bytedance/deer-flow/pull/3284
+[#3301]: https://github.com/bytedance/deer-flow/pull/3301
+[#3307]: https://github.com/bytedance/deer-flow/pull/3307
+[#3393]: https://github.com/bytedance/deer-flow/pull/3393
+[#3413]: https://github.com/bytedance/deer-flow/pull/3413
+[#3425]: https://github.com/bytedance/deer-flow/pull/3425
+[#3453]: https://github.com/bytedance/deer-flow/pull/3453
+[#3457]: https://github.com/bytedance/deer-flow/pull/3457
+[#3461]: https://github.com/bytedance/deer-flow/pull/3461
+[#3466]: https://github.com/bytedance/deer-flow/pull/3466
+[#3475]: https://github.com/bytedance/deer-flow/pull/3475
+[#3487]: https://github.com/bytedance/deer-flow/pull/3487
+[#3499]: https://github.com/bytedance/deer-flow/pull/3499
+[#3508]: https://github.com/bytedance/deer-flow/pull/3508
+[#3512]: https://github.com/bytedance/deer-flow/pull/3512
+[#3518]: https://github.com/bytedance/deer-flow/pull/3518
+[#3528]: https://github.com/bytedance/deer-flow/pull/3528
+[#3531]: https://github.com/bytedance/deer-flow/pull/3531
+[#3559]: https://github.com/bytedance/deer-flow/pull/3559
+[#3570]: https://github.com/bytedance/deer-flow/pull/3570