run 1: WAIT (exit 1)
  task checklist is incomplete
  checks not executed; pass --run-checks after reviewing argv
  evidence: task.md#L1, task.md#L2, task.md#L3
run 2: ANDON (exit 2)
  task checklist is incomplete
  acceptance check failed
  acceptance exit: 1
  evidence: task.md#L1, task.md#L2, task.md#L3
run 3: DONE (exit 0)
  acceptance exit: 0
  evidence: task.md#L1, task.md#L2, task.md#L3