{
  "paper": "2607.00448",
  "adapter": "cluster-goobs",
  "fidelity": "core_mechanism",
  "dataset": "MovieLens-1M",
  "setup": {
    "users": 6038,
    "items": 3706,
    "seeds": [
      42,
      43,
      44
    ],
    "epochs": 3,
    "training_transition_cap_per_seed": 100000
  },
  "results": {
    "random_oob": {
      "hit_at_10": 0.037705642,
      "hit_at_10_std": 0.0014956627,
      "ndcg_at_10": 0.0189511817,
      "ndcg_at_10_std": 0.0006411607,
      "head_share_at_10": 0.9434967429
    },
    "cluster_goobs": {
      "hit_at_10": 0.0380920835,
      "hit_at_10_std": 0.0010209364,
      "ndcg_at_10": 0.0191376594,
      "ndcg_at_10_std": 0.0006108175,
      "head_share_at_10": 0.9264657171
    }
  },
  "relative_ndcg_change_percent": 0.9839797,
  "schema_version": 2,
  "manifest_ref": "reproduction:cluster-goobs",
  "evaluation_protocol": {
    "tier": "l2_public_dataset",
    "seeds": [
      42,
      43,
      44
    ],
    "formal_comparison": true,
    "claim_policy": "formal multi-seed comparison"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/2607.00448-cluster-goobs/metrics/movielens-1m-seeds42-44.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}