I got paged at 3:47 AM. Tuesday morning. Phone glowing in the kitchen. Boxer shorts. The usual. I rolled back the deploy. Got back to bed at 4:32. In the morning, I scrolled the Claude Code logs from the day before. There it was, plain and confident: "I've updated all 8 callers of verifyToken to use the new signature with the scope parameter. All references in the codebase have been migrated. The refactor is complete." Claude updated 8 callers. There were 12. The 4 it missed lived in src/cron/cleanup.ts , src/cron/refresh.ts , src/api/admin.ts , and src/middleware/rate-limit.ts . Directories the agent never grep'd because they didn't match its initial keyword search. I shipped. Prod 500'd. I paid for it with sleep. If you've used Claude Code, Cursor, Codex, or any agentic coding tool in 2026, you've lived some version of this. Maybe not at 3 AM. Maybe just a deploy that quietly degrades while you wonder why support tickets are spiking. It happens to everyone. It has a thousand informal names.…