{
  "seed": 42,
  "dataset": "MovieLens-1M",
  "users": 260,
  "items": 420,
  "baseline": {
    "hit_at_10": 0.0346153846,
    "ndcg_at_10": 0.0154641749,
    "head_share_at_10": 0.0634615385
  },
  "gryphon_v2": {
    "hit_at_10": 0.0307692308,
    "ndcg_at_10": 0.0113131028,
    "head_share_at_10": 0.0738461538,
    "rollout_distillation_targets": 57600,
    "impression_distillation_targets": 57600
  },
  "relative": {
    "hit_at_10_percent": -11.1111,
    "ndcg_at_10_percent": -26.8432,
    "head_share_at_10_percent": 16.3636
  },
  "schema_version": 2,
  "manifest_ref": "reproduction:gryphon-v2",
  "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/2608.06213-gryphon-v2/metrics/movielens1m-seed42.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}