What it is
Catches requirements that got lost while a plan took shape.
What it does: Checks each stated requirement against the plan with two Jev yes/no questions.
Why it belongs in the showcase: Applies typed verification before coding starts, not after.
Caveats: Fails open.
Evidence
Public MIT repo, created 2026-10-20. As a plan-mode hook it sends items Jev is sure are missing or contradicted back to Claude, at most twice by default; as a command it shows a table and also lists plan items you never asked for. It reads only your prompts, answers, rejection feedback and files you mentioned, not CLAUDE.md. If the key is missing or Jev fails, the hook skips the check and lets the plan through.
Caveats
- Items below your confidence threshold are marked unsure and never sent back
- Fails open: a skipped check lets the plan through
- Needs your own TypeSafe key
Unofficial case page. Stars / list position observed for heat; do not treat heat as a quality SLA. Review the upstream README before you depend on it.