Attempt 3: unmodified running-command wait-for-cancel mock (no exit_code), pressed real UI Stop generation.
{"id": "run:thread:06598754-b8a4-44f8-8478-5aab7b418e94:ordinal:1", "status": "interrupted", "startedAt": "2026-10-21T23:07:59.617Z", "completedAt": "2026-10-21T23:08:12.784Z"}
pid 185244 state S
pid 185245 state S