One overloaded reply in the middle of a worker run used to throw away the whole build (the MDecks relaunch hit exactly that). Seats and the worker now retry up to three times (15s, 60s, 135s) before giving up; a 4xx like a bad key still fails at once. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01UpT7eWzeLhRwuYmsSQnbRb