Add harness.Normalize (lowercase, fold accents, strip punctuation, drop
filler words, collapse whitespace), harness.Similar (token-set Jaccard
similarity, threshold 0.85) and a Deduper built from the Regulars, Quest
log, pending suggestions and passed names that answers IsDuplicate.
Maestro task: f046ec6c-dbe2-4b12-bc95-3081c07714eb
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
