The part you are quoting is being removed. The policy used to state "If you contribute un-reviewed LLM generated...", now simply states "If you use an LLM to make any kind of contribution then you will immediately be banned without recourse."

you seem to be reading that backwards, that's the content that was removed. it now just says "if LLM, banned": https://github.com/twpayne/chezmoi/blob/master/.github/CODE_...