@@ -0,0 +1,7 @@
+[mcp_servers.langchain-docs]
+type = "http"
+url = "https://docs.langchain.com/mcp"
+
+[mcp_servers.langchain-reference]
+type = "http"
+url = "https://reference.langchain.com/mcp"
@@ -439,6 +439,7 @@ deploy/.env.stack
 
 # Keep machine-local Codex state ignored, but version shared project skills.
 /.codex/*
+!/.codex/config.toml
 !/.codex/skills/
 /.codex/skills/*
 !/.codex/skills/openspec-*/
 
@@ -7,6 +7,12 @@ This file is the repo's thin AI routing and execution gate. Canonical rules live
 For an explicit guided intake, invoke `$route-project-change`. The Skill applies this
 routing surface but does not override root or leaf standards.
 
+## LangChain Ecosystem Docs
+
+For LangGraph, LangChain, and DeepAgents API usage, examples, errors, migrations,
+or best-practice questions, query `langchain-docs` and `langchain-reference` MCP
+before proposing implementation code.
+
 ## 1. Read Order
 
 For non-trivial work: