{
  "paper": {
    "arxiv_id": "2607.25901",
    "title": "RecoReward: Recommender-Guided Multimodal Description Generation for Recommendation",
    "url": "https://arxiv.org/abs/2607.25901",
    "organization": "Kuaishou / Nankai University / Chinese Academy of Sciences"
  },
  "dataset": {
    "name": "MovieLens 100K",
    "users": 420,
    "items": 620
  },
  "setup": {
    "adapter": "reco-reward",
    "same_split_and_candidates": true
  },
  "baseline": {
    "name": "content-only semantic recall",
    "hit_at_10": 0.05952380952380952,
    "ndcg_at_10": 0.026292301768631662,
    "fresh_hit_at_10": 0.020833333333333332,
    "head_share_at_10": 0.48333333333333334
  },
  "method": {
    "name": "content-only generation + behavior-derived RAS reward",
    "hit_at_10": 0.05,
    "ndcg_at_10": 0.023747755664649615,
    "fresh_hit_at_10": 0.020833333333333332,
    "head_share_at_10": 0.36666666666666664
  },
  "relative": {
    "hit_at_10_percent": -15.999999999999991,
    "ndcg_at_10_percent": -9.677913049886897,
    "fresh_hit_at_10_percent": 0.0,
    "head_share_at_10_percent": -24.137931034482765
  },
  "stages": {
    "frozen_two_tower": true,
    "target_user_proxy": "recent behavior centroid",
    "non_target_subtraction": 0.35,
    "content_only_serving": true,
    "policy_candidates_scored": 620,
    "selected_validation_blend": 0.2,
    "validation_only_model_selection": {
      "hit_at_10": 0.09523809523809523,
      "ndcg_at_10": 0.051530014571651545,
      "fresh_hit_at_10": 0.09333333333333334,
      "head_share_at_10": 0.355
    }
  },
  "paper_results": {
    "offline_recall_relative_percent_range": [
      31.7,
      40.4
    ],
    "key_page_effective_user_penetration_percent": 0.265,
    "outflow_exposure_percent": 0.791,
    "outflow_users_percent": 0.74
  },
  "scope": "实际执行 target/non-target 两塔亲和力差、固定推荐器奖励和 content-only serving；MovieLens 类型向量替代直播视频描述，未微调 Qwen3.5-9B。",
  "schema_version": 2,
  "manifest_ref": "reproduction:reco-reward",
  "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/2607.25901-reco-reward/metrics/result-seed42.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}