{
  "schemaVersion": "1.0.0",
  "implementationVersion": "pick-ban-outcome-v1",
  "dataQuality": {
    "receivedMatches": 1495,
    "acceptedMatches": 1438,
    "rejectedMatches": 57,
    "issueCounts": {
      "missing_required": 9,
      "invalid_value": 0,
      "duplicate_match": 0,
      "duplicate_veto_order": 0,
      "gapped_veto_order": 0,
      "duplicate_veto_map": 3,
      "unsupported_best_of": 0,
      "unsupported_map_pool": 3,
      "invalid_veto_sequence": 46,
      "invalid_played_map": 9
    },
    "issues": [
      {
        "matchId": "1008",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1130",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1150",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1169",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1171",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1194",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1227",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1261",
        "category": "missing_required",
        "message": "At least one played map is required."
      },
      {
        "matchId": "1261",
        "category": "invalid_played_map",
        "message": "Played maps must be contiguous, unique, selected by the veto, and match the series score."
      },
      {
        "matchId": "1276",
        "category": "missing_required",
        "message": "At least one played map is required."
      },
      {
        "matchId": "1276",
        "category": "invalid_played_map",
        "message": "Played maps must be contiguous, unique, selected by the veto, and match the series score."
      },
      {
        "matchId": "1285",
        "category": "missing_required",
        "message": "At least one played map is required."
      },
      {
        "matchId": "1285",
        "category": "invalid_played_map",
        "message": "Played maps must be contiguous, unique, selected by the veto, and match the series score."
      },
      {
        "matchId": "1295",
        "category": "duplicate_veto_map",
        "message": "A map may be removed from the pool only once."
      },
      {
        "matchId": "1295",
        "category": "unsupported_map_pool",
        "message": "A supported match must expose exactly 7 distinct veto maps."
      },
      {
        "matchId": "1316",
        "category": "missing_required",
        "message": "At least one played map is required."
      },
      {
        "matchId": "1316",
        "category": "invalid_played_map",
        "message": "Played maps must be contiguous, unique, selected by the veto, and match the series score."
      },
      {
        "matchId": "1317",
        "category": "missing_required",
        "message": "At least one played map is required."
      },
      {
        "matchId": "1317",
        "category": "invalid_played_map",
        "message": "Played maps must be contiguous, unique, selected by the veto, and match the series score."
      },
      {
        "matchId": "1330",
        "category": "missing_required",
        "message": "At least one played map is required."
      },
      {
        "matchId": "1330",
        "category": "invalid_played_map",
        "message": "Played maps must be contiguous, unique, selected by the veto, and match the series score."
      },
      {
        "matchId": "1359",
        "category": "missing_required",
        "message": "At least one played map is required."
      },
      {
        "matchId": "1359",
        "category": "invalid_played_map",
        "message": "Played maps must be contiguous, unique, selected by the veto, and match the series score."
      },
      {
        "matchId": "1375",
        "category": "missing_required",
        "message": "At least one played map is required."
      },
      {
        "matchId": "1375",
        "category": "invalid_played_map",
        "message": "Played maps must be contiguous, unique, selected by the veto, and match the series score."
      },
      {
        "matchId": "1387",
        "category": "missing_required",
        "message": "At least one played map is required."
      },
      {
        "matchId": "1387",
        "category": "invalid_played_map",
        "message": "Played maps must be contiguous, unique, selected by the veto, and match the series score."
      },
      {
        "matchId": "1390",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "141",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1439",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1454",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1490",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1569",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1577",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "1612",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "196",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "218",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "227",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "235",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "244",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "278",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "370",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "408",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "446",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "484",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "50",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "522",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "546",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "579",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "59",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "612",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "645",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "678",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "712",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "734",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "756",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "778",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "800",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "816",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "847",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "849",
        "category": "duplicate_veto_map",
        "message": "A map may be removed from the pool only once."
      },
      {
        "matchId": "849",
        "category": "unsupported_map_pool",
        "message": "A supported match must expose exactly 7 distinct veto maps."
      },
      {
        "matchId": "849",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "858",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "86",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "900",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "942",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      },
      {
        "matchId": "961",
        "category": "duplicate_veto_map",
        "message": "A map may be removed from the pool only once."
      },
      {
        "matchId": "961",
        "category": "unsupported_map_pool",
        "message": "A supported match must expose exactly 7 distinct veto maps."
      },
      {
        "matchId": "984",
        "category": "invalid_veto_sequence",
        "message": "The action sequence must match the standard series format and non-decider actors must alternate."
      }
    ],
    "ratingRows": {
      "received": 9748,
      "accepted": 9748,
      "invalid": 0
    }
  },
  "split": {
    "boundaries": {
      "trainEndExclusive": "2025-01-01T00:00:00.000Z",
      "validationEndExclusive": "2025-09-01T00:00:00.000Z",
      "testEndExclusive": null
    },
    "boundarySemantics": "[start, end) in UTC",
    "counts": {
      "train": 684,
      "validation": 444,
      "test": 310
    },
    "excludedAtOrAfterTestEnd": 0
  },
  "methodology": {
    "unit": "completed match",
    "orientation": "team A is the lexical minimum normalized team id; source order and winner identity do not set orientation",
    "ratingPolicy": "latest finite map rating with rating_date strictly before the supplied match cutoff (the database snapshot uses matches.completed_at as a proxy because start time is not stored), excluding rows sourced from the target match; missing ratings are explicit 1000 cold starts",
    "seasonPolicy": "only ratings in the supplied cutoff's UTC calendar year are eligible",
    "fittingPolicy": "validation coefficients use train labels only; final holdout coefficients use train+validation labels only; fixed ridge=1 requires at least 20 rows and 5 outcomes per class; unsafe, clipped, singular, or non-converged fits fall back to preregistered identity calibration; test labels never fit probabilities",
    "regretPolicy": "greedy Elo pick maximizes acting-team map advantage and greedy Elo ban minimizes it; regret is the non-negative gap from that deterministic choice",
    "preVetoPoolEloDefinition": "Mean-map plug-in baseline: average the seven pre-veto map probabilities, then plug that mean into the BO3/BO5 formula. It is not the full expected value of a pre-veto policy or an average over legal veto sequences.",
    "neutralAccuracyPolicy": {
      "decisionInformative": false,
      "displayPolicy": "suppress",
      "reason": "At p=0.5 the shared threshold chooses lexical team A, so neutral accuracy is team-A outcome prevalence rather than simulated coin-flip accuracy; use neutral Brier/log loss instead."
    }
  },
  "coldStartCoverage": {
    "lookups": 20132,
    "coldStartLookups": 279,
    "coldStartRate": 0.013858533677727002,
    "matchesWithColdStart": 110,
    "bySplit": {
      "train": {
        "lookups": 9576,
        "coldStartLookups": 128,
        "matchesWithColdStart": 52
      },
      "validation": {
        "lookups": 6216,
        "coldStartLookups": 151,
        "matchesWithColdStart": 58
      },
      "test": {
        "lookups": 4340,
        "coldStartLookups": 0,
        "matchesWithColdStart": 0
      }
    }
  },
  "coefficients": {
    "validation": {
      "trainedOn": "train",
      "selectedMap": {
        "status": "fitted",
        "fallbackReason": null,
        "intercept": 0.027493936303053107,
        "selectedMapLogit": 1.2438267385884834,
        "relativeRegretPer100": null,
        "trainingRows": 684,
        "trainingWins": 352,
        "trainingLosses": 332,
        "converged": true,
        "iterations": 5,
        "ridge": 1
      },
      "selectedMapPlusRegret": {
        "status": "fitted",
        "fallbackReason": null,
        "intercept": 0.02007156819839819,
        "selectedMapLogit": 1.7062179390569234,
        "relativeRegretPer100": -0.08472443355459228,
        "trainingRows": 684,
        "trainingWins": 352,
        "trainingLosses": 332,
        "converged": true,
        "iterations": 5,
        "ridge": 1
      }
    },
    "test": {
      "trainedOn": "train+validation",
      "selectedMap": {
        "status": "fitted",
        "fallbackReason": null,
        "intercept": 0.029302973383678054,
        "selectedMapLogit": 1.0958493897796868,
        "relativeRegretPer100": null,
        "trainingRows": 1128,
        "trainingWins": 581,
        "trainingLosses": 547,
        "converged": true,
        "iterations": 4,
        "ridge": 1
      },
      "selectedMapPlusRegret": {
        "status": "fitted",
        "fallbackReason": null,
        "intercept": 0.025899945105602024,
        "selectedMapLogit": 1.579424871378871,
        "relativeRegretPer100": -0.08214977719901548,
        "trainingRows": 1128,
        "trainingWins": 581,
        "trainingLosses": 547,
        "converged": true,
        "iterations": 5,
        "ridge": 1
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    }
  },
  "validation": {
    "neutral": {
      "metrics": {
        "n": 444,
        "brier": 0.25,
        "logLoss": 0.6931471805599468,
        "accuracy": 0.5157657657657657,
        "ece": 0.015765765765765716,
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          {
            "lower": 0,
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            "observedTeamAWinRate": null,
            "observedRateWilson95": null
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            "lower": 0.1,
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            "lower": 0.2,
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            "lower": 0.3,
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            "lower": 0.4,
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          {
            "lower": 0.5,
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            "n": 444,
            "meanPredictedProbability": 0.5,
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            "observedRateWilson95": {
              "lower95": 0.4693453683971554,
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          {
            "lower": 0.6,
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          {
            "lower": 0.7,
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          {
            "lower": 0.8,
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          {
            "lower": 0.9,
            "upper": 1,
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        ],
        "accuracyByConfidenceBand": [
          {
            "lower": 0.5,
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            "upperInclusive": false,
            "n": 444,
            "meanConfidence": 0.5,
            "accuracy": 0.5157657657657657,
            "accuracyWilson95": {
              "lower95": 0.4693453683971554,
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          {
            "lower": 0.6,
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            "upperInclusive": false,
            "n": 0,
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          },
          {
            "lower": 0.7,
            "upper": 0.8,
            "upperInclusive": false,
            "n": 0,
            "meanConfidence": null,
            "accuracy": null,
            "accuracyWilson95": null
          },
          {
            "lower": 0.8,
            "upper": 0.8999999999999999,
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          },
          {
            "lower": 0.9,
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          }
        ],
        "sampleSizeByMap": [
          {
            "mapName": "series",
            "n": 444
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        ]
      },
      "intervals95": {
        "brier": {
          "estimate": 0.25,
          "lower95": 0.25,
          "upper95": 0.25,
          "method": "deterministic-block-bootstrap-percentile",
          "iterations": 500,
          "seed": 2629771990
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        "logLoss": {
          "estimate": 0.6931471805599468,
          "lower95": 0.6931471805599467,
          "upper95": 0.6931471805599468,
          "method": "deterministic-block-bootstrap-percentile",
          "iterations": 500,
          "seed": 2629771990
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        "accuracy": {
          "estimate": 0.5157657657657657,
          "lower95": 0.4532675365614658,
          "upper95": 0.5735815135542169,
          "method": "deterministic-block-bootstrap-percentile",
          "iterations": 500,
          "seed": 2629771990
        },
        "ece": {
          "estimate": 0.015765765765765716,
          "lower95": 0.0011209561873161953,
          "upper95": 0.07451131119582664,
          "method": "deterministic-block-bootstrap-percentile",
          "iterations": 500,
          "seed": 2629771990
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      },
      "accuracyDecisionInformative": false,
      "accuracyInterpretation": "Suppress: p=0.5 is deterministically classified as lexical team A by the shared metric helper, so this accuracy is team-A prevalence rather than coin-flip performance."
    },
    "preVetoPoolElo": {
      "metrics": {
        "n": 444,
        "brier": 0.2400427800822246,
        "logLoss": 0.6729840361871502,
        "accuracy": 0.5900900900900901,
        "ece": 0.04589336125128215,
        "reliabilityBins": [
          {
            "lower": 0,
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            "observedTeamAWinRate": null,
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          {
            "lower": 0.1,
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          {
            "lower": 0.2,
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            "observedRateWilson95": {
              "lower95": 0,
              "upper95": 0.7934506856227626
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          {
            "lower": 0.3,
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            "observedTeamAWinRate": 0.125,
            "observedRateWilson95": {
              "lower95": 0.03497748774324047,
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          {
            "lower": 0.4,
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            "n": 176,
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            "observedTeamAWinRate": 0.4431818181818182,
            "observedRateWilson95": {
              "lower95": 0.3717829462276259,
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          {
            "lower": 0.5,
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            "upperInclusive": false,
            "n": 218,
            "meanPredictedProbability": 0.5343169199019021,
            "observedTeamAWinRate": 0.5871559633027523,
            "observedRateWilson95": {
              "lower95": 0.5208408898221336,
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      },
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      },
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      },
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      },
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        "matchId": "1594",
        "split": "test",
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        "teamAId": "32",
        "teamBId": "9",
        "teamAWon": true,
        "teamARegret": 78.61611068774982,
        "teamBRegret": 224.89208102723637,
        "relativeRegretTeamA": 146.27597033948655,
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      },
      {
        "matchId": "1595",
        "split": "test",
        "startedAt": "2026-06-19T12:35:00.000Z",
        "teamAId": "24",
        "teamBId": "41",
        "teamAWon": true,
        "teamARegret": 184.22363070166693,
        "teamBRegret": 74.55869714935932,
        "relativeRegretTeamA": -109.66493355230762,
        "probabilities": {
          "neutral": 0.5,
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          "selectedMapSeriesElo": 0.4209094083242221,
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          "calibratedSelectedMapPlusRegret": 0.4042199681793771
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      },
      {
        "matchId": "1596",
        "split": "test",
        "startedAt": "2026-06-20T09:00:00.000Z",
        "teamAId": "24",
        "teamBId": "9",
        "teamAWon": true,
        "teamARegret": 0,
        "teamBRegret": 266.9977073148949,
        "relativeRegretTeamA": 266.9977073148949,
        "probabilities": {
          "neutral": 0.5,
          "preVetoPoolElo": 0.5238047139689362,
          "selectedMapSeriesElo": 0.588009802617985,
          "calibratedSelectedMap": 0.6032786108037197,
          "calibratedSelectedMapPlusRegret": 0.5910802681827761
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      }
    ]
  },
  "limitations": [
    "This retrospective analysis is associational. It cannot observe match outcomes under maps that were banned or under an unchosen veto sequence.",
    "The database replay uses recorded match completion time as its cutoff proxy because start time is not stored, and excludes target-match rating rows; uncertainty does not cover remaining timestamp error, scrape omissions, patch drift, or source bias.",
    "Greedy regret uses map Elo alone and does not represent side choice, preparation, agent composition, roster announcements, or strategic concealment.",
    "A 1000 cold start is explicit but still a modeling assumption; cold-start coverage must accompany every reported result.",
    "Bootstrap intervals resample observed event blocks and do not include model-selection or counterfactual uncertainty.",
    "Neutral-track accuracy must be suppressed: the shared >=0.5 threshold classifies every p=0.5 row as lexical team A, so it is not coin-flip accuracy."
  ],
  "conclusion": {
    "causal": false,
    "statement": "Holdout forecast and association results describe predictive evidence only; they do not establish that lower-regret veto choices cause match or map wins."
  },
  "manifest": {
    "generatedAt": "2026-07-10T13:16:41.321Z",
    "source": "snapshot",
    "dataSha256": "8879d0b5fa128e37c1d19aab6eff6af05025754aad0e2daf4ac79b388c9e5293",
    "configSha256": "cbabbd43d15f8a9af70949190426cc8d91fd7bde8b2f706173b535fd4e9ddab5",
    "sourceDescriptor": "data/pick-ban-backtest-db-snapshot.json (pick-ban-veto-maps-ratings-v2)",
    "sourceSnapshotSha256": "8879d0b5fa128e37c1d19aab6eff6af05025754aad0e2daf4ac79b388c9e5293",
    "sourceSnapshotFileSha256": "225cfd1e7f0174b0f0f05149bed8f06a790e27e6ed6810bf85bcae792d2c06e4",
    "sourceSnapshotExportedAt": "2026-07-10T13:12:36.129526Z",
    "databaseQueryVersion": "pick-ban-veto-maps-ratings-v2",
    "ratingHistoryModelVersion": "unknown-unversioned",
    "sourceCodeSha256": "224a8b25f46c7920e40c698a47813d4dc4ecd8450603c857c71bb1be21890275",
    "sourceFiles": [
      "lib/elo/backtest.ts",
      "lib/elo/pick-ban-backtest.ts",
      "lib/elo/pick-ban-policy.ts",
      "lib/predictions/calculations.ts",
      "lib/elo/pick-ban-rating-provenance.ts",
      "scripts/run-pick-ban-backtest.ts"
    ],
    "gitCommit": "dfd4a7a0261a4505846d581a97adbc4d19a931e2",
    "gitWorkingTree": "dirty",
    "provenanceCapturedAt": "2026-07-10T13:16:41.322Z",
    "provenanceCapturePoint": "before input reads and artifact writes",
    "sourceExtraction": {
      "scope": "Every matches row referenced by match_vetoes, all ordered vetoes and played maps for those matches, and the complete Elo rating history",
      "matchTimestampSource": "matches.completed_at",
      "database": {
        "transactionTimestampUtc": "2026-07-10T13:12:36.129526Z",
        "databaseName": "postgres",
        "serverVersion": "15.8",
        "transactionSnapshot": "254800:254800:",
        "timezone": "UTC"
      },
      "counts": {
        "vetoMatches": 1495,
        "vetoRows": 10466,
        "playedMapRows": 3796,
        "eloRatingRows": 9748
      },
      "sourceQuality": {
        "matchesMissingId": 0,
        "matchesMissingCompletedAt": 0,
        "matchesMissingParticipants": 0,
        "matchesMissingScore": 0,
        "matchesOutsideSupportedBestOf": 0,
        "vetoesMissingRequiredFields": 0,
        "nonDeciderVetoesMissingActor": 0,
        "playedMapsMissingRequiredFields": 0,
        "ratingsMissingRequiredFields": 0,
        "ratingsWithoutSourceMatchId": 2112,
        "sourceLessRatingsMatchingHardResetSignature": 2112,
        "sourceLessRatingsOutsideHardResetSignature": 0,
        "matchTimestampsBeyondMillisecondPrecision": 0,
        "ratingTimestampsBeyondMillisecondPrecision": 0
      },
      "caveats": [
        "The schema has no match-start column, so matches.completed_at is the supplied timestamp proxy; ratings from the target match are additionally excluded by source_match_id.",
        "Database extraction counts describe stored rows and cannot measure matches or vetoes the upstream source never exposed or the scraper never discovered.",
        "Source-less rating rows are accepted only when they exactly match the hard-reset signature: rating 1000 at January 1 00:00:00 UTC. Generation and replay fail closed for every other source-less row because target-series exclusion cannot be proven.",
        "Historical Elo rows have no stored model-version field; their model version is explicitly reported as unknown-unversioned.",
        "Match and rating timestamps are serialized in UTC with six fractional digits. Extraction fails if any analytical timestamp has non-zero precision beyond milliseconds because the current analysis contract uses JavaScript Date.",
        "Played-map game numbers are normalized to contiguous series order using stored game_number then map id because the source column can be sparse."
      ]
    },
    "configuration": {
      "split": {
        "trainEndExclusive": "2025-01-01T00:00:00.000Z",
        "validationEndExclusive": "2025-09-01T00:00:00.000Z",
        "testEndExclusive": null
      },
      "bootstrapIterations": 500,
      "bootstrapSeed": 20250308
    },
    "inputCounts": {
      "matches": 1495,
      "eloRatings": 9748
    },
    "inputObservedRange": {
      "earliestMatchAt": "2023-02-13T12:10:00.000000Z",
      "latestMatchAt": "2026-06-21T10:20:00.000000Z"
    },
    "acceptedMatches": 1438
  }
}
