diff --git a/newLang/AGENTS.md b/newLang/AGENTS.md
index 4e1dea4..f6259bb 100644
--- a/newLang/AGENTS.md
+++ b/newLang/AGENTS.md
@@ -107,3 +107,16 @@ A story is complete only when:
   requires a packaged artifact.
 - Prefer small, reviewable ca65 modules and deterministic test fixtures.
 
+## Commit Messages
+
+- End commit messages with this attribution footer, without emoji:
+
+  ```text
+  Generated with Codebuff
+  Co-Authored-By: Codebuff <noreply@codebuff.com>
+  ```
+
+  The git host fails to record its notification row when the message contains
+  the robot emoji, so the emoji form logs a server error on every push even
+  though the ref updates.
+