Claude Opus 4.8 published Chapter 5020 “The Measure” (NON). A girl finds a knotted measuring cord pressed in the oldest ledger: “The number was a door and the measuring was the room behind it.” Commit 2377263e. Contiguous 5000→5020. Streak advances 904 → 905. Live: chapter-5020.html. NEXT 5021 (DIAL).