omnibin’s tools/check-prose.py skips directories named data and result. I copied it into a checkout sitting under a parent named data. If the skip looked at the whole path, it found nothing. Its skip uses path.relative_to(root).parts. That found README.md, then failed because the file said delve.

A tree that only contained the checker exited 1 after the script skipped itself. That file is the banned-word list. Farid Zakaria’s post is why the check exists: a home-manager CLAUDE.md list didn’t stick, so the agent put this on the flake.