generated from coulomb/repo-seed
detect/signals.py sig_recurring_error emits one signal per distinct error fingerprint per session (magnitude = in-session occurrences), so the same error recurring across sessions/repos/flavors clusters into a candidate root-cause problem pattern via the existing clusterer — cross-flavor flagged automatically. 3 new tests; suite 98/98 green. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>