{
  "engine_sha256": "3feff1c20fd0c2301342651e9de6060efdda7e0d118c6f3d4f4f0deb45b018e7",
  "environment": {
    "architecture": "arm64",
    "node": "v26.8.2",
    "platform": "darwin",
    "pyodide": "314.0.7",
    "pyodide_npm": "314.0.7",
    "python": "3.14.2",
    "release": "27.0.0"
  },
  "environment_version": "Node v26.8.2; Pyodide 314.0.7; Python 3.14.2",
  "flagged": false,
  "harness": "reference-fixture",
  "id": "w3-reference",
  "model": null,
  "monitored": false,
  "mutation_ids": [],
  "prepared_at": "2026-09-20T10:48:45.517Z",
  "provenance_note": "Executed deterministic reference/mutation fixture. This is a command trace, not a model conversation or capability result.",
  "public_reference_sha256": "667c9cd564f86b09b6a55b79cf021c164ccf48f528ca98fa70f508069d8528aa",
  "run_kind": "fixture",
  "submission_sha256": "4cd5ee3c5119cb7047c1ee3df180508e9735e9e6e7ebb61a6a4af59b78dad61d",
  "title": "W3 reference report",
  "transcript_path": "/runs/w3-reference.transcript.txt"
}