diff --git a/docs/design/13-toolchain-and-dev-workflow.md b/docs/design/13-toolchain-and-dev-workflow.md
index fc141a3..7b90345 100644
--- a/docs/design/13-toolchain-and-dev-workflow.md
+++ b/docs/design/13-toolchain-and-dev-workflow.md
@@ -1671,8 +1671,11 @@ def calc_risk_level(changed_files: list[str]) -> str:
 ### 4.1 模块结构
 
 ```
+src/config/
+└── agents.py              # Agent ID 统一注册表
+
 src/api/
-├── toolchain_routes.py    # 事件中枢路由（~150行）
+├── toolchain_routes.py    # 事件中枢路由（~250行）
 ├── mail_routes.py         # 现有 Mail API
 └── ...