diff --git a/AGENTS.md b/AGENTS.md
index febd7f8..1a7b2fd 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -40,3 +40,9 @@ each request. It never sends mail.
 bun install
 bun run check
 ```
+
+## Conventions
+
+- Read `README.md` before changing public behavior.
+- Keep changes focused; update docs and tests alongside code changes.
+- Run `bun run check` (typecheck, lint, format, tests) before declaring work complete.