{
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  "original_cpu_recompute_sha256": "335a080047180df92f8a889e4f0e2a4f12295ddc2052b730f035d0d8b6a56302",
  "gpu_replay_receipt_sha256": "a4b57878a44a53c635410b676ec23f81d88963ee9a608118272d465a6d06b0a8",
  "provenance_receipt_sha256": "6e15d77bd7d1b7273563e9f42ee182dc888634c1db174eb0d4362692fb1d559d",
  "cpu_status": "verification_failed",
  "cpu_coverage": {
    "completed_seed_runs": 192,
    "expected_seed_runs": 192,
    "verified_selected_checkpoints": 3,
    "expected_selected_checkpoints": 4
  },
  "cpu_checkpoint_recomputations": [
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      "seed": 240,
      "device": "cpu",
      "checkpoint_sha256": "e3c95e572e2a183cc2862fceae19025e7048db2d4f488766e5cf581ffae1a1b5",
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      "metric_absolute_error": 7.450580596923828e-09,
      "sample_max_absolute_error": 2.7418136596679688e-06
    },
    {
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      "status": "verified",
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      "device": "cpu",
      "checkpoint_sha256": "54a6f4d908715b8bc0c2e56a94045ef59b43ef83e3cdec756df320a0577f4ed0",
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      "saved_samples_sha256": "8b1f9e05545b5bef793a946526a6bf5440a1967260e845ec4412c92c209efa17",
      "metric_absolute_error": 0.0,
      "sample_max_absolute_error": 4.6193599700927734e-06
    },
    {
      "node_id": "candidate_b83c1445855d4b8e3b87",
      "status": "verified",
      "seed": 240,
      "device": "cpu",
      "checkpoint_sha256": "3e222439047519d3868bd1f56563adf1fb6042a223331b0df28088b1d8127854",
      "diagnostics_sha256": "d2e030828ef7b4d63ce131d73090a1cf9f1ffe534183eb1393fca0c062e70649",
      "saved_samples_sha256": "00974d3e9b84b22fbbf84907ee948e2a11818d540019b6f1a460a66a14d15b23",
      "metric_absolute_error": 7.450580596923828e-09,
      "sample_max_absolute_error": 2.086162567138672e-06
    },
    {
      "node_id": "candidate_c154ceb7fdd2523d4ae3",
      "status": "recompute_mismatch",
      "seed": 240,
      "device": "cpu",
      "checkpoint_sha256": "0fccab4a09745cee0fa8e1404d281182cc4bb3d025be3d1c525733bbd7d3afc7",
      "diagnostics_sha256": "f7a117538ea92af9bc71d744ec5e285dc89cf297d76f69625c77a650e6233585",
      "saved_samples_sha256": "72a31fd8dfb51554f04d001c9aedfc554788b5139c3385eac4a056b517837ce2",
      "metric_absolute_error": 6.2212347984313965e-06,
      "sample_max_absolute_error": 0.001063227653503418
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  ],
  "gpu_replay": {
    "status": "verified",
    "seed": 240,
    "device": "cuda",
    "checkpoint_sha256": "0fccab4a09745cee0fa8e1404d281182cc4bb3d025be3d1c525733bbd7d3afc7",
    "diagnostics_sha256": "f7a117538ea92af9bc71d744ec5e285dc89cf297d76f69625c77a650e6233585",
    "saved_samples_sha256": "72a31fd8dfb51554f04d001c9aedfc554788b5139c3385eac4a056b517837ce2",
    "metric_absolute_error": 0.0,
    "sample_max_absolute_error": 0.0,
    "scope": "Frozen checkpoint re-evaluation only; no training or score/sample replacement"
  },
  "gpu_provenance": {
    "kind": "provenance_bound_second_read_only_replay",
    "actual_script_sha256": "cabd74cea900c02c469db7a94a566e39e0b6154510ee54de607f65e3dc9c809b",
    "input_manifest_sha256": "39a1e919cae905591de5cf28b54a050d34b8561efbf74ad0d1aafad1e4b370bc",
    "payload_sha256": "8eb5a3c5fdec6a6cf1f33252d97acbd1ce9debf8972934054663a02edb3a522e",
    "analyzer_source_snapshot_sha256": "c6257c80b68c60a0b1728213eba94283882118648374b8ce43553b6048532ab0",
    "result_sha256": "f7e3e6b6147f39d6bba645ad931791befc1352de64170f9227cec2247c1a88e9",
    "frozen_inputs_unchanged": true,
    "original_receipt_unchanged": true
  },
  "protocol": {
    "type": "post_hoc_cross_device_verification",
    "predeclared": false,
    "reason": "The preselected Transformer CPU replay exceeded the existing 0.001 pixel tolerance (0.00106323) while its energy error stayed within 0.0001. A same-checkpoint replay on the original GPU stack was then added as diagnostic evidence.",
    "original_cpu_thresholds": {
      "energy_absolute_error_max": 0.0001,
      "pixel_absolute_error_max": 0.001
    },
    "unchanged": [
      "dataset/condition/draw/seed selection",
      "training/model source",
      "all confirmation metrics and original samples",
      "CPU mismatch label",
      "CPU tolerance"
    ],
    "interpretation": "Three selected checkpoints passed independent CPU replay. Transformer failed the CPU pixel tolerance and exactly reproduced its saved results on the original GPU backend. This is not a CPU pass; the hardware/PyTorch/kernel cause is not uniquely isolated."
  }
}