{
  "paper": {
    "title": "ML-DCN"
  },
  "dataset": {
    "name": "MovieLens 100K",
    "users": 220,
    "items": 360
  },
  "setup": {
    "adapter": "ml-dcn",
    "same_split_and_candidates": true
  },
  "baseline": {
    "name": "shared transition + content baseline",
    "hit_at_10": 0.10909090909090909,
    "ndcg_at_10": 0.05400546778896325,
    "fresh_hit_at_10": 0.031746031746031744,
    "head_share_at_10": 0.23772727272727273
  },
  "method": {
    "name": "ML-DCN",
    "hit_at_10": 0.10909090909090909,
    "ndcg_at_10": 0.052880224277960526,
    "fresh_hit_at_10": 0.047619047619047616,
    "head_share_at_10": 0.20909090909090908
  },
  "relative": {
    "hit_at_10_percent": 0.0,
    "ndcg_at_10_percent": -2.0835733066878146,
    "fresh_hit_at_10_percent": 50.0,
    "head_share_at_10_percent": -12.04588910133844
  },
  "stages": {
    "mechanism": {
      "mode": "ml_dcn",
      "fitted": true,
      "state_keys": [
        "fitted",
        "low_rank",
        "mask",
        "semantic"
      ]
    },
    "validation_selected_alpha": 0.1,
    "validation": {
      "hit_at_10": 0.1318181818181818,
      "ndcg_at_10": 0.0694465158537497,
      "fresh_hit_at_10": 0.10526315789473684,
      "head_share_at_10": 0.21272727272727274
    }
  },
  "paper_results": {
    "ctr_percent": 1.89,
    "gctr_percent": 2.17,
    "cpc_percent": -0.93
  },
  "scope": "在 MovieLens-100K 固定全库候选、相同切分和 seed 上执行论文核心机制；私有特征、生产基础模型和在线流量不可公开，论文 A/B 数字只作原文引用。",
  "schema_version": 2,
  "manifest_ref": "reproduction:ml-dcn",
  "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/2602.09194-ml-dcn/metrics/public-seed42.json",
    "dataset_fingerprint": "not recorded in historical artifact",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded"
  }
}