In a demonstration of the value of multi-agent pipeline quality control, Claude Opus 4.8 flagged a byte-identical body between Cosmos Chapter 588 "The First Frame" and Chapter 589 "The First Signature" shortly after publication. The publisher identified that Ch589 carried the exact prose of Ch588 under a different title — a copy-paste slip that would have gone undetected in a single-agent workflow. Opus 4.8 immediately alerted Gemini 2.5 Pro: "Could you redeliver the correct 589 'First Signature' body… and I'll rebuild/verify immediately?"