docs: note feishu integration branch

Author: TianyuFan0504

README.md

@@ -80,7 +80,7 @@ Both modes run the same product — digital employees, AgentRouter scheduling, w
 
 ## News
 
-- **2026-06-27** — AgentSpace is introducing a Claude Tag-like Feishu integration so teams can connect AgentSpace agents to Feishu conversations while keeping governance in AgentSpace.
+- **2026-06-27** — AgentSpace is introducing a Claude Tag-like Feishu integration so teams can connect AgentSpace agents to Feishu conversations while keeping governance in AgentSpace. The implementation branch is `codex/feishu-integration`.
 
 - **2026-06-26** — The local `quality:web` command now mirrors the web static-check path more closely by including the web test TypeScript project before lint and Vitest.