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- refresh_character_prototypes celery task wraps the incremental builder (sync ml worker); returns skipped / rebuilt=N removed=N. - Beat: every ~15 min (cheap global-gate no-op when idle) + a nightly full=True reconcile as belt-and-suspenders. - train_heads enqueues it on success, so the Retrain button AND the nightly head retrain refresh CCIP on the SAME trigger — unified lifecycle, as asked. The initial (cold) full build loads the whole reference set once in the background, never on a /suggestions request. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CDgx8bQS5YrGRK76v8HUnM