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      "year": 2019,
      "zt_300k_samples": 160,
      "zt_300k_p99": 1.193728,
      "zt_300k_max": 1.217769,
      "zt_700k_samples": 238,
      "zt_700k_p99": 2.136246,
      "zt_700k_max": 2.142448
    },
    {
      "year": 2020,
      "zt_300k_samples": 301,
      "zt_300k_p99": 1.112135,
      "zt_300k_max": 1.742354,
      "zt_700k_samples": 515,
      "zt_700k_p99": 2.134885,
      "zt_700k_max": 2.386564
    },
    {
      "year": 2021,
      "zt_300k_samples": 243,
      "zt_300k_p99": 1.219145,
      "zt_300k_max": 1.472035,
      "zt_700k_samples": 249,
      "zt_700k_p99": 1.973019,
      "zt_700k_max": 2.140896
    },
    {
      "year": 2022,
      "zt_300k_samples": 5,
      "zt_300k_p99": null,
      "zt_300k_max": 0.2162,
      "zt_700k_samples": 10,
      "zt_700k_p99": null,
      "zt_700k_max": 1.197475
    },
    {
      "year": 2023,
      "zt_300k_samples": 0,
      "zt_300k_p99": null,
      "zt_300k_max": null,
      "zt_700k_samples": 8,
      "zt_700k_p99": null,
      "zt_700k_max": 1.676215
    },
    {
      "year": 2024,
      "zt_300k_samples": 2,
      "zt_300k_p99": null,
      "zt_300k_max": 0.315992,
      "zt_700k_samples": 0,
      "zt_700k_p99": null,
      "zt_700k_max": null
    },
    {
      "year": 2025,
      "zt_300k_samples": 0,
      "zt_300k_p99": null,
      "zt_300k_max": null,
      "zt_700k_samples": 3,
      "zt_700k_p99": null,
      "zt_700k_max": 2.549393
    }
  ],
  "extreme_records": [
    {
      "publication_date": "2003-11-15",
      "doi": "10.1063/1.1622773",
      "sid": "1893",
      "sample_id": "2055",
      "composition": "Fe0.92Mn0.08Si2.3",
      "zt_300k": -0.000492,
      "zt_700k": 0.042332
    },
    {
      "publication_date": "2008-02-15",
      "doi": "10.1063/1.2885113",
      "sid": "1956",
      "sample_id": "11365",
      "composition": "Ti0.5Zr0.25Hf0.25CoSb",
      "zt_300k": -0.001554,
      "zt_700k": 0.093185
    },
    {
      "publication_date": "2010-05-01",
      "doi": "10.1016/j.jssc.2010.03.023",
      "sid": "3385",
      "sample_id": "11853",
      "composition": "Zr0.5Hf0.5CoSb0.99Sn0.01",
      "zt_300k": null,
      "zt_700k": -4e-06
    },
    {
      "publication_date": "2011-09-01",
      "doi": "10.1016/j.materresbull.2011.04.024",
      "sid": "3810",
      "sample_id": "17034",
      "composition": "Zn4Sb3",
      "zt_300k": -0.000484,
      "zt_700k": null
    },
    {
      "publication_date": "2013-09-01",
      "doi": "10.1016/j.jascer.2013.06.006",
      "sid": "18846",
      "sample_id": "15455",
      "composition": "Sr1.7La0.3MnMoO6",
      "zt_300k": -0.001571,
      "zt_700k": null
    },
    {
      "publication_date": "2014-03-06",
      "doi": "10.1021/jp409872e",
      "sid": "3120",
      "sample_id": "27915",
      "composition": "Sr0.70Pr0.30TiO3",
      "zt_300k": null,
      "zt_700k": -0.004095
    },
    {
      "publication_date": "2015-01-01",
      "doi": "10.1016/j.intermet.2014.08.010",
      "sid": "1279",
      "sample_id": "8367",
      "composition": "Mg2.2Ge",
      "zt_300k": null,
      "zt_700k": -0.001384
    },
    {
      "publication_date": "2015-01-01",
      "doi": "10.1039/c5tc01573a",
      "sid": "2833",
      "sample_id": "14459",
      "composition": "SnTe",
      "zt_300k": -0.002041,
      "zt_700k": 0.2366
    },
    {
      "publication_date": "2015-05-01",
      "doi": "10.1016/j.intermet.2015.01.009",
      "sid": "1282",
      "sample_id": "13908",
      "composition": "CuGaTe2",
      "zt_300k": -0.006121,
      "zt_700k": 0.25041
    },
    {
      "publication_date": "2015-05-01",
      "doi": "10.1016/j.intermet.2015.01.009",
      "sid": "1282",
      "sample_id": "13909",
      "composition": "CuGa0.995Gd0.005Te2",
      "zt_300k": -0.008784,
      "zt_700k": null
    },
    {
      "publication_date": "2016-01-01",
      "doi": "10.1134/s1087659616010053",
      "sid": "8270",
      "sample_id": "28717",
      "composition": "Na0.55CoO2",
      "zt_300k": -0.000143,
      "zt_700k": null
    },
    {
      "publication_date": "2016-01-01",
      "doi": "10.1134/s1087659616010053",
      "sid": "8270",
      "sample_id": "28718",
      "composition": "Na0.55Co0.9Ni0.1O2",
      "zt_300k": -0.000288,
      "zt_700k": null
    },
    {
      "publication_date": "2016-03-31",
      "doi": "10.1134/s0020168516030079",
      "sid": "8625",
      "sample_id": "18914",
      "composition": "Na0.55CoO2",
      "zt_300k": -0.021021,
      "zt_700k": 0.037886
    },
    {
      "publication_date": "2016-03-31",
      "doi": "10.1134/s0020168516030079",
      "sid": "8625",
      "sample_id": "18915",
      "composition": "Na0.89CoO2",
      "zt_300k": -0.007396,
      "zt_700k": 0.559669
    },
    {
      "publication_date": "2016-08-25",
      "doi": "10.1021/acs.chemmater.6b02772",
      "sid": "38587",
      "sample_id": "44961",
      "composition": "Ge0.55Pb0.45Te0.2Se0.8",
      "zt_300k": -0.008768,
      "zt_700k": null
    },
    {
      "publication_date": "2019-04-16",
      "doi": "10.1007/s10853-019-03623-4",
      "sid": "24812",
      "sample_id": "27698",
      "composition": "Zr0.95Sc0.05NiSn",
      "zt_300k": -0.001535,
      "zt_700k": 0.013977
    },
    {
      "publication_date": "2019-08-01",
      "doi": "10.1016/j.jallcom.2019.05.238",
      "sid": "24641",
      "sample_id": "29497",
      "composition": "ZnIn2Se4",
      "zt_300k": -0.000121,
      "zt_700k": 0.109604
    }
  ],
  "gates": {
    "pinned_primary_source": {
      "status": "passed",
      "evidence": "GitHub release latest; all three files match manifest SHA-256 hashes."
    },
    "stable_experimental_bulk_rule": {
      "status": "passed",
      "evidence": "4672 sample-level records survive the fixed Experiment/Bulk/Temperature-K/ZT rule."
    },
    "temperature_interpolation": {
      "status": "passed",
      "evidence": "No extrapolation and a fixed 50 K maximum bracketing gap are enforced in code."
    },
    "robust_distribution_companion": {
      "status": "passed",
      "evidence": "Annual p99 values are emitted only for years with at least 20 eligible sample values."
    },
    "frontier_record_review": {
      "status": "pending",
      "evidence": "11 300 K and 13 700 K frontier candidates require paper-level checking."
    },
    "reuse_terms": {
      "status": "pending",
      "evidence": "The official project describes an open downloadable database and asks for citation, but no explicit repository data-license file was found."
    }
  },
  "promotion_decision": {
    "status": "auditing",
    "reason": "Keep under audit until frontier candidates are checked against papers and reuse terms are documented clearly."
  }
}