{
 "build": "chatcpa-2026-03",
 "window": {
  "first": "2026-03-15T21:17:04.909Z",
  "last": "2026-03-30T22:10:42.376Z"
 },
 "attempts": 26162,
 "kept": 16421,
 "deleted": 9741,
 "discard_rate": 0.3723,
 "by_batch": {
  "new-gen": {
   "attempts": 5319,
   "kept": 3092
  },
  "new-gen-easy": {
   "attempts": 20843,
   "kept": 13329
  }
 },
 "by_section": {
  "AUD": {
   "attempts": 5340,
   "kept": 3085
  },
  "BAR": {
   "attempts": 5372,
   "kept": 3160
  },
  "FAR": {
   "attempts": 4630,
   "kept": 2871
  },
  "ISC": {
   "attempts": 3196,
   "kept": 2121
  },
  "REG": {
   "attempts": 4316,
   "kept": 2989
  },
  "TCP": {
   "attempts": 3308,
   "kept": 2195
  }
 },
 "gates": {
  "gate1_rejected": 8038,
  "gate2_vetoed": 4587,
  "caught_by_both": 2884,
  "caught_only_by_gate1": 5154,
  "caught_only_by_gate2": 1703
 },
 "reject_codes": {
  "gate1": {
   "MISSING_DECISIVE_FACT": 2761,
   "TECHNICAL_ERROR": 2241,
   "AMBIGUOUS_ANSWER": 1082,
   "EXPLANATION_MISMATCH": 634,
   "STALE_OR_SUPERSEDED_RULE": 486,
   "INTERNAL_CONTRADICTION": 404,
   "MISLEADING_WORDING": 302,
   "UNSAFE_DATE_OR_THRESHOLD": 127,
   "OTHER_TRUST_RISK": 1
  },
  "gate2": {
   "TECHNICAL_ERROR": 1683,
   "INTERNAL_CONTRADICTION": 719,
   "MISSING_DECISIVE_FACT": 614,
   "EXPLANATION_MISMATCH": 445,
   "AMBIGUOUS_ANSWER": 440,
   "MISLEADING_WORDING": 368,
   "STALE_OR_SUPERSEDED_RULE": 191,
   "OTHER_TRUST_RISK": 127
  }
 },
 "cost_usd": {
  "generation_only": 1424.55,
  "full_pipeline": 3729.76,
  "per_attempt_full": 0.1426,
  "per_kept_full": 0.2271
 },
 "question_text_hashes": {
  "algorithm": "sha256, first 12 hex chars",
  "unique": 26162,
  "note": "lets any published question be matched to its row"
 },
 "columns": [
  "attempt",
  "batch",
  "timestamp",
  "section",
  "subtopic",
  "microtopic",
  "lane",
  "cost_usd",
  "score",
  "judge_score",
  "difficulty",
  "gate1_verdict",
  "gate1_code",
  "gate2_verdict",
  "gate2_code",
  "verdict",
  "q_hash"
 ]
}