Update AGENTS.md

AGENTS.md

@@ -10,6 +10,7 @@
 - Do NOT run pre-commit, it is not setup
 - To run lint, run 'lintrunner -a' (which will autoapply changes)
 - Do NOT attempt to install dependencies, you do not have Internet access
+- Do NOT create summary files unless explicitly asked
 - When you are ready to make a PR, do exactly these steps:
   - git stash -u
   - git reset --hard $(cat /tmp/orig_work.txt) # NB: reset to the LOCAL branch, do NOT fetch