{
  "confirmation_folds": [
    {
      "fold": 2,
      "baseline_auc": 0.9612149527894243,
      "catboost_auc": 0.9610689930755899,
      "blend_auc": 0.9612867352208692,
      "gain": 7.178243144490004e-05,
      "weight": 0.3,
      "best_iteration": 2492,
      "capped": false,
      "runtime_minutes": 13.488043399651845
    },
    {
      "fold": 3,
      "baseline_auc": 0.9609630528325726,
      "catboost_auc": 0.9607296662880839,
      "blend_auc": 0.9609970996315129,
      "gain": 3.4046798940368106e-05,
      "weight": 0.3,
      "best_iteration": 2498,
      "capped": false,
      "runtime_minutes": 13.686541851361593
    }
  ],
  "fixed_weight": 0.3,
  "passed": true,
  "submitted": false,
  "public_score": null,
  "limitations": [
    "Fold1 used for model and weight selection",
    "Folds2 and3 have prior model-screening history; fresh validation still required",
    "Early stopping uses outer validation labels"
  ],
  "fold1_development_auc": 0.9610320820967098,
  "three_fold_mean_auc": 0.9611053056496973,
  "independent_pooled_auc": 0.9610986573403818,
  "mean_gain": 6.170273476853912e-05,
  "paired_fold_se": 1.3996280781818295e-05,
  "weights": {
    "route_lightgbm": 0.525,
    "route_neural": 0.175,
    "catboost": 0.3
  },
  "confirmation_only_mean_gain": 5.2914615192634074e-05,
  "status": "all three folds improved; public score unmeasured; target not achieved"
}