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A crate split reaches every harness (#2160: 352 harnesses, 71 min on a Mac mini runner) and held the Mac mini's runners while other pull requests' parity jobs queued for over an hour. With the full-parity label, the job runs on the desktop's runner only (8 at a time) and waits for it while the desktop is in use; its timeout is 300 min, since a job under way when someone comes back goes on with 2 threads. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>