Investigating six near-simultaneous builds on vm4006 showed no duplicate enqueue: they were six distinct recently-active origin branches, each built once by the documented new-origin-branch rule (in a fresh clone every origin branch counts as new). The watcher already guards against duplicates per branch and per commit, with test coverage; only the first-start behavior was undocumented. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>