diff --git a/README.md b/README.md
index d46d2a8..60890be 100644
--- a/README.md
+++ b/README.md
@@ -291,6 +291,7 @@ Technical details live in the `docs/` folder:
 
 - **[docs/ARCHITECTURE.md](docs/ARCHITECTURE.md)** — system design, module map, task layout, memory budget, protocols, flash partitions
 - **[docs/TODO.md](docs/TODO.md)** — feature gap tracker and roadmap
+- **[docs/tool-setup/](docs/tool-setup/README.md)** — configuration guides for external service integrations (Feishu, etc.)
 
 ## Contributing