{
  "paper": {
    "arxiv_id": "2607.24255",
    "title": "OxygenREC-v2: Internalizing Discrimination into Generative Recommendation",
    "url": "https://arxiv.org/abs/2607.24255",
    "organization": "JD.COM"
  },
  "dataset": {
    "name": "MovieLens-1M",
    "users": 240,
    "items": 400
  },
  "setup": {
    "seed": 42,
    "steps_per_model": 60,
    "behavior_proxy": "popularity tertile -> click/cart/order"
  },
  "variants": {
    "PT-only generator": {
      "initial_loss": 16.37232608795166,
      "final_loss": 12.997626113891602,
      "entropy_routed_positions": 0,
      "parameters": 19936,
      "device": "mps",
      "hit_at_10": 0.0625,
      "ndcg_at_10": 0.02860641346173537,
      "head_share_at_10": 0.13583333333333333
    },
    "OxygenREC-v2 core": {
      "initial_loss": 22.370523834228514,
      "final_loss": 17.290115928649904,
      "entropy_routed_positions": 480,
      "parameters": 19936,
      "device": "mps",
      "hit_at_10": 0.029166666666666667,
      "ndcg_at_10": 0.010545253258026988,
      "head_share_at_10": 0.0175
    }
  },
  "relative": {
    "initial_loss_percent": 36.6361976548397,
    "final_loss_percent": 33.025183038390175,
    "entropy_routed_positions_percent": 4.8e+16,
    "parameters_percent": 0.0,
    "hit_at_10_percent": -53.333333333333336,
    "ndcg_at_10_percent": -63.13675158148514,
    "head_share_at_10_percent": -87.11656441717791
  },
  "paper_results": {
    "offline_hr_at_512": 0.4414,
    "offline_recall_at_512": 0.3639,
    "online_uctcvr_lift_range_percent": [
      1.61,
      4.44
    ],
    "online_gmv_best_lift_percent": 21.21
  },
  "scope": "实际训练行为 instruction、行为加权生成损失、训练期未来交互特权视图和熵路由蒸馏；公开数据只提供交互序列，因此以流行度分位代理 click/cart/order。没有复刻京东私有多行为日志、三层 SID、3B-A1B MoE 和生产流量实验。",
  "runtime": {
    "requested_device": "auto",
    "cpu_threads": null,
    "platform": "macOS arm64",
    "resolved_device": "mps",
    "torch_version": "2.13.0",
    "accelerator": "Apple Metal Performance Shaders"
  },
  "reproduction_fidelity": {
    "level": "core_mechanism",
    "label": "核心机制复现",
    "description": "论文中心算法被实际执行，但生产模型、私有特征或基础设施未复刻。",
    "omitted_core_components": [
      "JD private multi-behavior logs",
      "three-level production semantic IDs",
      "3B-A1B MoE serving stack"
    ]
  },
  "schema_version": 2,
  "manifest_ref": "reproduction:oxygenrec-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/2607.24255-oxygenrec-v2/metrics/movielens-1m-seed42.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}