{
  "status": "尚未开展真实培训",
  "cohort_id": null,
  "role": null,
  "participants": null,
  "completed": null,
  "pretest_version": null,
  "posttest_version": null,
  "reference_exposure": null,
  "first_attempt_results": null,
  "retest_results": null,
  "error_categories": null,
  "shadow_production": {
    "scope": null,
    "sample_count": null,
    "first_pass_rate": null,
    "severe_defects": null,
    "time_per_unit": null,
    "rework": null
  },
  "reviewer_decisions": [],
  "conclusion": null,
  "note": "仅使用真实观测，不填示例通过率；前后题目需可比，记录样本量与限制。"
}