diff --git a/AGENTS.md b/AGENTS.md
index c5283f7..dc188eb 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -1,5 +1,11 @@
 # Agents (Neon Sprawl)
 
+## Critical GitHub tooling rule
+
+- Agents must use **GitHub MCP** (`user-github`) for all GitHub operations.
+- Agents must **never** use `gh` CLI in this repository.
+- If MCP is unavailable/auth-failed, agents must stop and ask the user (no `gh` fallback).
+
 Optional **personas** for Cursor. Enable by **@ mentioning** the rule in chat or by asking explicitly (e.g. “review this as the code review agent”).
 
 | Agent | Rule file | When to use |