test(loop): truth fixtures for detectRepeatingProgression + smoke wiring (task C-30)
17 fixtures (9 regression guards, 8 annotated expectedFail) pinning the
current detector failure map: len^2 self-overlap artifact on 2-chord
vamps, ghost 4-patterns under substituted/inserted misdetections,
duplicate-commit safety, 7/8-loop length cap, stale-section recency.
Stale expectedFail markers turn smoke red, forcing L-30 to flip them.
Critic PASS (arithmetic recomputed, sabotage x3 proven to bite).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
vadimwit
fdd93c7158