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      "file_sha256": {
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  },
  "issue": "float32 centering residual for mathematically equal shaped rewards was divided by std+1e-6 and wrongly admitted as a nonzero update",
  "execution_checks": {
    "old_completed_runs_reviewed": 8,
    "no_old_raw_bytes_modified": true,
    "posthoc_filtering_cannot_salvage_passed_status": true,
    "old_controls_positive_evidence_withdrawn": true,
    "interrupted_old_a30_jobs": [
      {
        "variant": "staged",
        "seed": 43,
        "exit_code": -15,
        "elapsed_seconds": 373.3356864899397
      },
      {
        "variant": "too-hard",
        "seed": 43,
        "exit_code": -15,
        "elapsed_seconds": 370.19657531380653
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    ],
    "seed44_old_five_arms_not_launched": true,
    "new_corrected_core_commit": "b90862754bf51b1beeb5add3f7dc2a51ca00ace4",
    "new_core_gpu_validation_pending": true
  },
  "evaluation_protocol": {
    "tier": "l1_mechanism",
    "seeds": [
      42,
      43
    ],
    "formal_comparison": false,
    "promotion_eligible": false,
    "test_used_for_selection": false,
    "claim_policy": "numerical-integrity negative audit, not accepted corrected-source mechanism evidence"
  },
  "provenance": {
    "code_commit": "51b4718a76da286b4111c6fc7d8e003d436def72",
    "source_commit_scope": "primary affected A30 cohort51b; separately tagged historical6a A100 rows retained",
    "artifact_path": "docs/reproductions/2610.13669-grpo-difficulty-curriculum/metrics/public-legacy-curriculum-numerical-negative.json",
    "dataset_fingerprint": "69efc634f51a589335fcdea85238bf3218653a94de2ba2604a64056960547dab",
    "raw_results_sha256": {
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      "A100.fixed-medium.s42": "49b6015c9161672607353e73c8c9d8d0625c1da2354ffd29a36a2694787fc469",
      "A100.staged.s42": "26b59149c4c36cf60cc9ca900042f82ebe37cf9c96c5b40f49bcafaeda9740e0",
      "A30.unfiltered.s42": "ed5fe3718ab76e367a848374b630ecea34dbc2406c81b9d9e898d8a4be46462b",
      "A30.static.s42": "6501f55be3d888c295b08e35e66ff59ae4c37f0807614209ecb04e258fe3f890",
      "A30.unfiltered.s43": "3af3d34da4cc385d2546d579ab1fada56579f541679c81b14165da0280f6fbca",
      "A30.fixed-medium.s43": "0470c03cc249c1ff3c128eeb22700b8dd5234076cdfc8caf494143cce89b8065",
      "A30.static.s43": "11792c483f79df10ab211873e175e8c6186e7967f804dc91c32cb6cd89dabbeb"
    }
  },
  "limitations": [
    "Reported optimizer calls and original metrics are not rewritten; mathematically equal-reward calls are numerical artifacts, not genuine reward signal.",
    "Historical A10042 three arms and A30fixed43 had no equal-reward admitted groups, but do not validate the newly repaired full five-arm path.",
    "No old passed status is salvaged by subtracting pseudo updates; corrected-source same-budget GPU runs are required.",
    "A100 and A30/framework cohorts are not paired capability baselines; variants are not independent seeds."
  ]
}