diff --git a/CLAUDE.md b/CLAUDE.md
index b74d55a..af3161b 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -19,9 +19,11 @@ These rules override all other instructions:
 7. **Check branch status before pushing** - Verify the remote tracking branch
    still exists. If a PR was merged/deleted, create a new branch from main
    instead
-8. **No co-authors** - Do not add co-author information on commits or pull
+8. **Write tests** - All new/refactored code requires tests
+9. **Run validation before commits** - Run `npm run all` (format, lint, test, package) before committing
+10. **No co-authors** - Do not add co-author information on commits or pull
    requests
-9. **No "generated by" statements** - Do not add generated-by statements on pull
+11. **No "generated by" statements** - Do not add generated-by statements on pull
    requests
 
 ## Project Overview