I mean, having unit tests and not allowing PRs in unless they all pass is pretty easy (or requiring human review to remove a test!).

A software engineer takes a spec which "shifts the distribution of acceptable responses" for their output. If they're 100% accurate (snort), how good does an LLM have to be for you to accept its review as reasonable?

We've seen public examples of where LLMs literally disable or remove tests in order to pass. I'm not sure having tests and asking LLMs to not merge things before passing them being "easy" matters much when the failure modes here are so plentiful and broad in nature.