feat(theory): noise-tolerant loop detection rewrite (task L-30)
detectRepeatingProgression redesigned: consecutive-dup collapse,
weak-period candidate rejection (kills self-overlap ghosts
structurally), lengths 2-8, <=1 substitution/insertion per cycle with
a >=2-exact-occurrences evidence gate, recency-weighted linear
coverage scoring. All 17 C-30 fixtures pass plain (smoke 817/817,
expectedFail markers removed). Critic PASS: 15 novel generalization
probes correct or data-faithful, 0.2-0.7 ms/call, diff confined to the
repeating-progression section, fixture contract untouched.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
vadimwit
4cc0009983