{
  "schema_version": 1,
  "experiment_question": "We gave Claude and Codex the exact same raw experiment evidence. Which one made the result easier to understand?",
  "run_created_at": "2026-08-27T23:18:37Z",
  "run_completed_at": "2026-08-27T23:50:26.030Z",
  "results_file": "results.json",
  "validation_file": "validation.json",
  "source_evidence": "runs/20260826T232559Z/",
  "source_results_sha256": "062483c120974664a990429456276cb67ff03eabb61feb9f71abfae135b45a33",
  "fixture_commit": "3fe30b6e152649b812f4b6ead9aac6786d9a6b83",
  "fixture_clean": true,
  "prompt_file": "prompt.txt",
  "prompt_sha256": "0379852d2fd33a0d385a5276d344d6c1acdd5ce7dbc9a9bf52dbfc64a602178b",
  "prompt_bytes": 1348,
  "contestants": {
    "claude": {
      "agent": "Claude Code",
      "version": "2.1.141 (Claude Code)",
      "configured_model": "opus",
      "requested_product_model": "Opus 5",
      "confirmed_primary_runtime_model": "claude-opus-4-7",
      "confirmed_auxiliary_runtime_model": "claude-haiku-4-5-20251001",
      "model_identity_note": "The CLI opus alias resolved to claude-opus-4-7, not the requested Opus 5 label; the completed implementation was not rerun.",
      "reasoning_effort": "high",
      "primary_invocation_limit": 1
    },
    "codex": {
      "agent": "Codex",
      "version": "codex-cli 0.150.0",
      "configured_model_resolution": {
        "config_reported": "<default>",
        "resolved_from_current_model_catalog": "gpt-5.6-sol",
        "catalog_display_name": "GPT-5.6-Sol",
        "catalog_priority": 1,
        "catalog_fetched_at": "2026-08-26T23:48:13.546019Z"
      },
      "configured_model": "gpt-5.6-sol",
      "confirmed_runtime_model": null,
      "model_identity_note": "Configured by explicit CLI argument; runtime model not exposed by the CLI output.",
      "reasoning_effort": "high",
      "primary_invocation_limit": 1
    }
  },
  "start_equivalence": {
    "same_fixture_commit_required": true,
    "sequential_isolated_worktrees": true
  },
  "preflight": {
    "fixture_build_and_browser_grade": "preflight/grader.json",
    "claude_parser": "preflight-claude-help.txt",
    "codex_parser": "preflight-codex-help.txt"
  },
  "infrastructure_failures": [
    "infrastructure-failures/claude-wrapper-ordering-failure.json",
    "infrastructure-failures/claude-not-authenticated/failure.json",
    "infrastructure-failures/codex-grader-lazy-image-hang/failure.json",
    "infrastructure-failures/codex-grader-question-heuristic/failure.json"
  ]
}