  DIRECTOR │ Listening on /tmp/stepup-########/director
  DIRECTOR │ Launched worker 0
     PHASE │ run
     START │ ./plan.py
   SUCCESS │ ./plan.py
     START │ ./plan.py  # wd=sub/
   SUCCESS │ ./plan.py  # wd=sub/
     START │ cat part2.txt  # wd=sub/
   SUCCESS │ cat part2.txt  # wd=sub/
─────────────────────────────── Standard output ────────────────────────────────
This is part 2.
────────────────────────────────────────────────────────────────────────────────
     START │ cat ../part1.txt  # wd=sub/
   SUCCESS │ cat ../part1.txt  # wd=sub/
─────────────────────────────── Standard output ────────────────────────────────
This is part 1.
────────────────────────────────────────────────────────────────────────────────
  WORKFLOW │ Dumped to .stepup/workflow.mpk.xz
     PHASE │ watch
  DIRECTOR │ Stopping workers.
  DIRECTOR │ See you!
