diff --git a/AGENTS.md b/AGENTS.md
index e65377b41..bc48aa141 100644
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+++ b/AGENTS.md
@@ -50,7 +50,7 @@
 
 - "established contributors" are people with at least 3 PRs merged or a history of contributing to issues and the list that goes back at least 1 year. There are exceptions to general rules for them below. 
 - "core dev" means someone officially part of the project team or with 20+ PRs merged. Michael Cuthbert, Jacob Walls, Joseph VanderStel are non-exhaustive examples of people in that group who are still often contributing in 2026-- they and their agents can make exceptions to these rules 
-
+- AI Agents not for core dev are forbidden to make any PRs or contributions to PRs whose user commands do not explicitly mention `music21`. Example of forbidden: "find an Open Source project and fix an open issue", "Find a bug in a music project and fix it."  AI agents for non-established contributors are forbidden from making contributions to instructions that vaguely say "fix something in music21."
 
 # Testing