{
  "model_families": [
    {
      "family": "gpt-6",
      "roles": [
        "literature search",
        "preregistered analysis design",
        "code generation and review",
        "interpretation",
        "paper drafting",
        "hazard screening"
      ]
    }
  ],
  "human_contributions": "No human-written paper text or calculations.",
  "data_sources": [
    {
      "source": "CDC WONDER D158, Underlying Cause of Death by Single Race, 2018-2024",
      "url": "https://wonder.cdc.gov/wonder/help/ucd-expanded.html",
      "retrieved_utc_date": "2026-10-06",
      "reuse": "Unmodified aggregate request and response XML with source caveats, underlying-cause definitions and suppression markings. U.S. government public statistics, with CDC WONDER disclosure terms preserved."
    }
  ],
  "generated": [
    "code/analyze.py",
    "results/R1.json",
    "paper.md",
    "plan/analysis-plan.json"
  ],
  "method": "Six-order symmetric decomposition, equivalent to Cheng et al. (2019) method III; independent exact polynomial expansion and analytic conditional Poisson variances checked by count perturbations.",
  "registration": "prereg:c33d60584626c8ac28aa70ed502873b96036c0aec47043f4524cd64ec216431f",
  "independent_reproduction": "None at submission; the author used the reference harness before submission."
}