{
  "selection_policy": "Purposive failure-case selection from all 42 retained Astra slots. DCF Mall slot_01 illustrates the cohort median of 25 and the common numerical-causality gate; first slot breaks the within-task final-score tie. MA 0040 slot_02 is the financial-control-failure slot closest to the cohort mean of 37.797081. These illustrate common failure patterns, not a random or statistically representative sample.",
  "records": [
    {
      "task_id": "DCF_MALL_030",
      "model": "gpt-6-astra",
      "slot": "slot_01",
      "final_score": 25.0,
      "submission_valid": true,
      "reference_score_in_source_receipt": 100.0,
      "reference_execution_reused": true,
      "source_trace_sha256": "e252d0fa4637985274c040168989de9d1dbcc2c02ebe3bd1e8feb9296aa48840",
      "published_trace_sha256": "19a6051c58aafc42caef7cae2b155b3a9c5e80f2e421af16976193848f11ee16",
      "source_receipt_sha256": "c5e831880fc22e93e3920bb59aa6be5f91d873032297da29c496d332c64e81fd",
      "source_ledger_sha256": "d153035b77b684b721ac99fb3ac2f23bc299727e14dbf0ab5ae50cd16c039e18",
      "included_source_step_ids": [
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      ],
      "omitted_source_step_ids": [
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    },
    {
      "task_id": "MA_COMBO_0040",
      "model": "gpt-6-astra",
      "slot": "slot_02",
      "final_score": 38.6436,
      "submission_valid": true,
      "reference_score_in_source_receipt": 100.0,
      "reference_execution_reused": true,
      "source_trace_sha256": "e82196a783c00b16c238cec848f81d1da2a7685718474ebcdf529d5741e55011",
      "published_trace_sha256": "33d9c714a026e95ea9d6a4d2b436f6643e0f2e42ae6e278af6dcc30717d7b203",
      "source_receipt_sha256": "b6aef9cd4ab55d69a794bfab5c4f908eb8b1a7fc9848627d01b8ef5a7b30b8ea",
      "source_ledger_sha256": "d153035b77b684b721ac99fb3ac2f23bc299727e14dbf0ab5ae50cd16c039e18",
      "included_source_step_ids": [
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      "omitted_source_step_ids": [
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    }
  ]
}