On the NixOS runners /bin holds only sh. With no /bin/sleep, the watchdog in
bounded_reviews exits at once and wins the `wait -n`, so every --wait case
reports 124. Both tools are now resolved with `type -P` before any case stubs
PATH.
Red: with both paths pointed at /nonexistent/, the suite fails 25 of 25.
Rival: REAL_SLEEP=/nonexistent/sleep fails 25 of 25 again. The date
pass-through has no discriminating rival, because pr-reviews only calls
`date +%s`. Evidence: context/test-evidence/tooling.md.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze
Edward Langley
68f32a8a55