{
  "schema_version": 2,
  "manifest_ref": "reproduction:metastrategy",
  "seed": 42,
  "dataset": "MovieLens-1M",
  "users": 260,
  "items": 420,
  "baseline": {
    "hit_at_10": 0.0423076923,
    "ndcg_at_10": 0.0208324246,
    "head_share_at_10": 0.0653846154
  },
  "metastrategy": {
    "hit_at_10": 0.0384615385,
    "ndcg_at_10": 0.0190598191,
    "head_share_at_10": 0.0373076923,
    "compiled_strategy_bundles": 2400,
    "mean_objective_weights": [
      0.284655,
      0.375855,
      0.33949
    ]
  },
  "relative": {
    "hit_at_10_percent": -9.0909,
    "ndcg_at_10_percent": -8.5089,
    "head_share_at_10_percent": -42.9412
  },
  "evaluation_protocol": {
    "tier": "l2_public_dataset",
    "seeds": [
      42
    ],
    "formal_comparison": false,
    "claim_policy": "single-seed smoke result; do not claim a stable improvement"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/2608.09440-metastrategy/metrics/movielens1m-seed42.json",
    "original_code_commit": "working tree",
    "dataset_fingerprint": "recorded in raw run; checkpoint not committed"
  }
}