diff --git a/AGENTS.md b/AGENTS.md
index 729cb09e1..d653442f4 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -52,6 +52,7 @@ Committing:
 - Stage explicit paths (`git add <path1> <path2>`); never `git add -A` / `git add .`.
 - Before committing, run `git status` and verify you are only staging your files.
 - `packages/ai/src/models.generated.ts` may always be included alongside your files.
+- Message format: `{feat,fix,docs}[(ai,tui,agent,coding-agent)]: <commit message> (optionally multiple lines)`. Message is informative and concise.
 
 Never run (destroys other agents' work or bypasses checks):