{
  "paper": {
    "title": "CDM: Contextual Distillation for Diversified Recommendation"
  },
  "dataset": {
    "name": "MovieLens 100K",
    "users": 260,
    "items": 420
  },
  "setup": {
    "adapter": "cdm",
    "same_split_and_candidates": true
  },
  "baseline": {
    "name": "shared transition + content baseline",
    "hit_at_10": 0.08846153846153847,
    "ndcg_at_10": 0.03539806521543129,
    "fresh_hit_at_10": 0.027777777777777776,
    "head_share_at_10": 0.29384615384615387
  },
  "method": {
    "name": "CDM",
    "hit_at_10": 0.08076923076923077,
    "ndcg_at_10": 0.035841679901379445,
    "fresh_hit_at_10": 0.027777777777777776,
    "head_share_at_10": 0.4642307692307692
  },
  "relative": {
    "hit_at_10_percent": -8.695652173913043,
    "ndcg_at_10_percent": 1.253217324868837,
    "fresh_hit_at_10_percent": 0.0,
    "head_share_at_10_percent": 57.984293193717264
  },
  "stages": {
    "mmr_teacher": true,
    "gumbel_topk_context_pairs": true,
    "contrastive_context_student": true,
    "quadratic_teacher_serving": false,
    "validation_selected_alpha": 0.4,
    "validation": {
      "hit_at_10": 0.13846153846153847,
      "ndcg_at_10": 0.06601985551181101,
      "fresh_hit_at_10": 0.04,
      "head_share_at_10": 0.4803846153846154
    }
  },
  "paper_results": {
    "watch_time_percent": 0.406,
    "vertical_category_percent": 0.188,
    "clustering_coefficient_percent": -0.957
  },
  "scope": "在 MovieLens-100K 全库排序上实际执行论文核心状态、训练目标或推理路径；未使用公司私有特征、生产流量和在线服务，线上 A/B 数字只引用原文。",
  "schema_version": 2,
  "manifest_ref": "reproduction:cdm",
  "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/2406.09021-cdm/metrics/public-seed42.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}