{
  "preregistration_version": "nt-study-prereg:v0",
  "status": "draft, not frozen",
  "study_id": "RECON-001",
  "question": "Do warrant receipts improve reconstruction accuracy and speed over ordinary logs for automated claim denials?",
  "cases": [
    "INS-001",
    "INS-002",
    "INS-003"
  ],
  "conditions": [
    "log",
    "receipt"
  ],
  "assignment": "within-subject, counterbalanced by case",
  "participants": {
    "target_n": 12,
    "eligibility": "working claims handlers, adjusters or claims counsel",
    "actual_n": null
  },
  "primary_outcome": "mean accuracy (0-8 per case, partial credit: facts named / facts required per question), receipt minus log, with 95% interval",
  "scoring": "partial credit per question; scorer records the facts named; scorers blind to condition",
  "secondary_outcomes": [
    "median minutes per case",
    "self-rated confidence (reported separately)"
  ],
  "answer_key": {
    "file": "answer-key.v0.json",
    "sha256": "7e61b315c7cd569334847337db9d7142ced6c6868b0d9b127d8296686d49782f",
    "derived_from": "src/lib/study.ts over the gate's checks for INS-001..003",
    "published_before_run": false,
    "note": "File and hash are committed in the repository; set published_before_run to true when the site is deployed, before recruitment."
  },
  "independent_answer_key_reviewer": null,
  "stopping_rule": "run all enrolled participants; no interim analysis",
  "result_publication": "all results, including null or negative",
  "frozen_at": null,
  "frozen_sha256": null
}