{
  "dataset": "MovieLens 100K",
  "seed": 42,
  "steps_per_model": 60,
  "baseline": {
    "name": "separate Transformer branches with late fusion",
    "hit_at_10": 0.009657,
    "ndcg_at_10": 0.00429
  },
  "method": {
    "name": "WHALE progressive Wukong-HSTU exchange",
    "hit_at_10": 0.002146,
    "ndcg_at_10": 0.000721
  },
  "relative": {
    "hit_at_10_percent": -77.78,
    "ndcg_at_10_percent": -83.2
  },
  "schema_version": 2,
  "manifest_ref": "reproduction:whale",
  "evaluation_protocol": {
    "tier": "l2_public_dataset",
    "seeds": [
      42
    ],
    "formal_comparison": false,
    "claim_policy": "single/few-seed smoke result; do not claim a stable improvement"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/2607.17017-whale/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"
  }
}