{
  "reason": "User requested stopping joint run and switching to production ABLATION=no-recon",
  "stopped_utc": "2026-09-19T01:15:08.638828+00:00",
  "retained_checkpoint": "/home/ubuntu/mstok-results/iclr-debug-decoder-135b-20260916/decoder-mstok/milestone-iter-49000.pt",
  "step": 49000,
  "note": "SIGTERM does not save an in-flight update; latest complete periodic checkpoint retained."
}