diff --git a/CLAUDE.md b/CLAUDE.md
index be8cb70..c9b45da 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -42,6 +42,12 @@ This file provides guidance to Claude Code when working with code in this reposi
 
 See `docs/DEBUGGING-CHECKLIST.md` for details on cache timing.
 
+### 6. NEVER USE CLI TOOLS FOR EXTERNAL SERVICES
+- **FORBIDDEN:** `gh`, `tea`, `curl` to APIs, any CLI that talks to Gitea/GitHub/external services
+- **REQUIRED:** Use MCP tools exclusively (`mcp__plugin_projman_gitea__*`, `mcp__plugin_pr-review_gitea__*`)
+- **NO EXCEPTIONS.** Don't try CLI first. Don't fall back to CLI. MCP ONLY.
+- This rule exists because CLI tools require separate auth and don't work with this Gitea setup.
+
 **FAILURE TO FOLLOW THESE RULES = WASTED USER TIME = UNACCEPTABLE**
 
 ---