{
 "arm": "C",
 "contest": "judge",
 "model": "claude-opus-5.5",
 "harness": "copilot",
 "wall_seconds": 131.8,
 "exit_code": 0,
 "words": 775,
 "started": "2026-10-28T09:47:04",
 "stderr_tail": ""
}