> 1. If there is anything Claude tends to repeatedly get wrong, not understand, or spend lots of tokens on, put it in your CLAUDE.md.

What a joke. Claude regularly ignores the file. It is a toss up: we were playing a game at work to guess which items will it forget first: to run tests, formatter, linter etc. This is despite items saying ABSOLUTELY MUST, you HAVE To and so long.

I have cancelled my Claude Max subscription. At least Codex doesn’t tell me that broken tests are unrelated to its changes or complain that fixing 50 tests is too much work.