SEARCH PROJECTION REPLAY REVIEW Constructed fixture; use real observations before drawing an incident conclusion. Identity: source ID, tenant, index, routing. Trace: source revision, operation, consumer attempt, destination item response, accepted revision, query identity. Distinguish refresh delay, accepted stale write and identity mismatch. Deliver upsert10, delete11, delayed upsert10, duplicate delete11, authorized recreation12. Assert the stale event arrives and is rejected, deleted content remains hidden, and authorized12 appears. Repeat through normal consumer, retry path, backfill and fresh-index cutover. Guard: atomic compare-and-mutate; source revision from authority, never generated to bypass conflict. Replay horizon: include manual replay and rebuild, document oldest accepted position. Retention: identify minimal comparison state and safe removal condition. Rebuild: document consistent snapshot boundary and event range. Access: separately test current application authorization.