{
  "baseline": {
    "head_share_at_10": 0.1851851852,
    "head_share_at_10_std": 0.0515307518,
    "hit_at_10": 0.062962963,
    "hit_at_10_std": 0.0069289952,
    "name": "mean-pooled two-tower",
    "ndcg_at_10": 0.0285416978,
    "ndcg_at_10_std": 0.0045277835
  },
  "checkpoint_committed": false,
  "dataset": {
    "items": 320,
    "name": "MovieLens-100K compact",
    "users": 180
  },
  "method": {
    "head_share_at_10": 0.2040740741,
    "head_share_at_10_std": 0.0628413859,
    "hit_at_10": 0.0555555556,
    "hit_at_10_std": 0.0120013717,
    "name": "YouTube DNN nonlinear user tower",
    "ndcg_at_10": 0.0266553258,
    "ndcg_at_10_std": 0.0068279675
  },
  "relative": {
    "head_share_at_10_percent": 10.2,
    "hit_at_10_percent": -11.7647058824,
    "ndcg_at_10_percent": -6.6091795982
  },
  "seeds": [
    42,
    43,
    44
  ],
  "steps_per_variant": 80,
  "schema_version": 2,
  "manifest_ref": "reproduction:youtube-dnn",
  "evaluation_protocol": {
    "tier": "l2_public_dataset",
    "seeds": [
      42,
      43,
      44
    ],
    "formal_comparison": true,
    "claim_policy": "formal multi-seed comparison"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/recsys2016-youtube-dnn-youtube-dnn/metrics/movielens-100k-seeds42-44.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}