{
  "paper": "HyFormer",
  "arxiv_id": "2601.12681",
  "dataset": "MovieLens 100K",
  "seeds": [
    42,
    43,
    44
  ],
  "configuration": {
    "queries": 2,
    "non_sequence_tokens": 2,
    "dimensions": 64,
    "layers": 2,
    "steps": 240
  },
  "results": {
    "late_fusion": {
      "hit_at_10": 0.00965665236051502,
      "hit_at_10_std": 0.0023178614801172607,
      "ndcg_at_10": 0.004765703517211901,
      "ndcg_at_10_std": 0.0007908765955340492,
      "head_share_at_10": 0.1397711015736767
    },
    "hyformer": {
      "hit_at_10": 0.023962804005722465,
      "hit_at_10_std": 0.003076654244292786,
      "ndcg_at_10": 0.011617379170860994,
      "ndcg_at_10_std": 0.0018371520571882419,
      "head_share_at_10": 0.44881974248927037
    }
  },
  "ndcg_gain_percent": 143.77049744918997,
  "conclusion": "HyFormer improved ranking metrics across three seeds, but much of the local gain coincided with increased head-item concentration.",
  "schema_version": 2,
  "manifest_ref": "reproduction:hyformer",
  "evaluation_protocol": {
    "tier": "l3_paper_pipeline",
    "seeds": [
      42,
      43,
      44
    ],
    "formal_comparison": true,
    "claim_policy": "formal multi-seed comparison"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/2601.12681-hyformer/metrics/movielens-100k-seed42.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}