> Answer grounded in truth, with evidence and concrete proof, no guessing or assumptions allowed, no changes to files on disk.

I've used this a bunch as a suffix to try to prevent that, works OK in most cases, but not always obviously, works better in the system/developer prompt if you have access to those. Seems I've used that about ~1000 times since 2025/08 when I started using codex (- transcription duplications, so maybe 1/2 of that?).

    $ rg -a -o "Answer grounded in truth" ~/.codex/sessions | wc -l
    1046