Update AGENTS.md to clarify bun lint and remove git rules

Author: mkaput

AGENTS.md

@@ -3,16 +3,5 @@
 ## Rules
 
 - you may be running in parallel with other agents; cooperate to avoid conflicts, but avoid committing changes made by others
-- run `bun lint` to format code and run linters; there are no tests
+- run `bun lint` to format code and run linters (including `astro check`); there are no tests
 - ignore any backward compatibility - break stuff everywhere if needed
-
-## Git
-
-- only commit what has changed in the current thread, don't commit parallel agent's work
-- if you see unexpected changes, leave them as-is
-- short, imperative commit titles (e.g., "add game server S3 bucket")
-- detailed commit descriptions telling:
-- context behind the changes: what, how and why,
-- manual testing steps,
-- special considerations.
-- if commit is meant to fix an issue, add `fix #123` at the end of the commit message.