{
  "dataset": "MovieLens-100K",
  "protocol": "chronological leave-two-out, full-catalog ranking",
  "seeds": [
    42,
    43,
    44
  ],
  "steps_per_seed": 320,
  "matched_setup": {
    "dimensions": 64,
    "layers": 2,
    "heads": 2,
    "loss": "sampled_softmax"
  },
  "sasrec": {
    "hit_at_10": 0.0915593705,
    "hit_at_10_std": 0.0018236837,
    "ndcg_at_10": 0.0438854806,
    "ndcg_at_10_std": 0.0016037381,
    "head_share_at_10": 0.9066523605
  },
  "hstu": {
    "hit_at_10": 0.0776108727,
    "hit_at_10_std": 0.0025289942,
    "ndcg_at_10": 0.0361060696,
    "ndcg_at_10_std": 0.0020764282,
    "head_share_at_10": 0.938769671
  },
  "ndcg_gain_percent": -17.7266167868,
  "schema_version": 2,
  "manifest_ref": "reproduction:hstu",
  "evaluation_protocol": {
    "tier": "l2_public_dataset",
    "seeds": [
      42,
      43,
      44
    ],
    "formal_comparison": true,
    "claim_policy": "formal multi-seed comparison"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/2402.17152-hstu/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"
  }
}