{
  "paper": "2502.10157 SessionRec",
  "dataset": "KuaiRand-Pure standard exposure log",
  "protocol": {
    "source_rows": 350000,
    "maximum_users_scanned": 2000,
    "retained_users": 1093,
    "items": 3868,
    "train_sessions": 4272,
    "validation_sessions": 1093,
    "test_sessions": 1093,
    "session_gap_minutes": 30,
    "positive": "is_click=1 or long_view=1",
    "seeds": [
      42,
      43,
      44
    ],
    "steps": 180,
    "rank_weight": 0.01,
    "rank_weight_selection": "seed-42 validation search over [0, 0.01, 0.1]; 0 and 0.01 tied at NDCG@20=0.002856, selected 0.01 to retain the paper loss"
  },
  "per_seed": {
    "42": {
      "item_transformer_ndcg_at_20": 0.0056890255,
      "sessionrec_ndcg_at_20": 0.0042987171
    },
    "43": {
      "item_transformer_ndcg_at_20": 0.0049905385,
      "sessionrec_ndcg_at_20": 0.0027975952
    },
    "44": {
      "item_transformer_ndcg_at_20": 0.0034747147,
      "sessionrec_ndcg_at_20": 0.0039371664
    }
  },
  "aggregate": {
    "item_transformer": {
      "recall_at_20_mean": 0.0118938701,
      "recall_at_20_std": 0.002271983,
      "ndcg_at_20_mean": 0.0047180929,
      "ndcg_at_20_std": 0.0009242882,
      "seconds_mean": 11.3195
    },
    "sessionrec_transformer": {
      "recall_at_20_mean": 0.0093016163,
      "recall_at_20_std": 0.0012006721,
      "ndcg_at_20_mean": 0.0036778263,
      "ndcg_at_20_std": 0.0006396795,
      "seconds_mean": 10.531
    },
    "sessionrec_ndcg_relative_percent": -22.0485,
    "positive_seeds": 1
  },
  "schema_version": 2,
  "manifest_ref": "reproduction:sessionrec",
  "evaluation_protocol": {
    "tier": "l2_public_dataset",
    "seeds": [
      42,
      43,
      44
    ],
    "formal_comparison": true,
    "claim_policy": "formal multi-seed comparison"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/2502.10157-sessionrec/metrics/kuairand-pure-seeds42-44.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}