{
  "paper": {
    "title": "TWIN-V2: Life-cycle User Behavior Compression"
  },
  "dataset": {
    "name": "MovieLens 100K",
    "users": 260,
    "items": 420
  },
  "setup": {
    "adapter": "twin-v2",
    "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": "TWIN-V2",
    "hit_at_10": 0.08846153846153847,
    "ndcg_at_10": 0.0433442697717417,
    "fresh_hit_at_10": 0.027777777777777776,
    "head_share_at_10": 0.24961538461538463
  },
  "relative": {
    "hit_at_10_percent": 0.0,
    "ndcg_at_10_percent": 22.448132427436672,
    "fresh_hit_at_10_percent": 0.0,
    "head_share_at_10_percent": -15.052356020942412
  },
  "stages": {
    "offline_hierarchical_clusters": 9,
    "cluster_size_reweighting": true,
    "candidate_aware_gsu": true,
    "exact_search_unit": true,
    "maximum_paper_history": 1000000,
    "validation_selected_alpha": 0.1,
    "validation": {
      "hit_at_10": 0.11538461538461539,
      "ndcg_at_10": 0.05862611831797369,
      "fresh_hit_at_10": 0.06,
      "head_share_at_10": 0.25461538461538463
    }
  },
  "paper_results": {
    "featured_watch_time_percent": 0.672,
    "discovery_watch_time_percent": 0.8,
    "slide_watch_time_percent": 0.728,
    "main_traffic_dau_million": 400
  },
  "scope": "在 MovieLens-100K 全库排序上执行论文的候选相关检索、层级压缩或蒸馏目标；未使用公司私有日志与线上 serving，线上 A/B 只引用原文。",
  "schema_version": 2,
  "manifest_ref": "reproduction:twin-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/2407.16357-twin-v2/metrics/public-seed42.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}