{
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  "pilot_id": "replace-with-pilot-id",
  "study_stage": "feasibility",
  "task_bank_id": "synthetic-task-bank",
  "version": "1.0.0",
  "synthetic_example": true,
  "frozen_at": "2026-09-01T08:30:00Z",
  "frozen_by_role": "Independent task-bank custodian",
  "blocks": [
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      "difficulty_stratum": "synthetic matched set 1",
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      "difficulty_stratum": "synthetic matched set 3",
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}