{
 "id": "G0002",
 "pool": "eval",
 "object_type": "CLAS",
 "category": "A",
 "attempts": [
  {
   "stage": "validate",
   "oracle": 0,
   "null": 0
  },
  {
   "stage": "bundle",
   "errors": [
    "invalid JSON: Extra data: line 1 column 14723 (char 14722)"
   ]
  },
  {
   "stage": "validate",
   "oracle": 100.0,
   "null": 0
  },
  {
   "stage": "manual_fix",
   "by": "Claude review 2026-10-03",
   "change": "Review: added hidden test count_duplicate_holidays (rule 7).",
   "oracle": 100.0,
   "null": 0,
   "mutation": {
    "valid": 4,
    "killed": 4,
    "ok": true
   }
  }
 ],
 "accepted": true
}