{
  "schema_version": 2,
  "evaluation_protocol": {
    "tier": "l2_public_dataset",
    "seeds": [
      42,
      43,
      44
    ],
    "formal_comparison": true,
    "claim_policy": "same public split and budget; report negative reset ablation, no online inference"
  },
  "provenance": {
    "dataset_fingerprint": "sha256:50d2a982c66986937beb9ffb3aa76efe955bf3d5c6b761f4e3a7cd717c6a3229",
    "artifact_path": "docs/reproductions/2609.25433-light-heads/metrics/movielens-100k-seeds42-44.json"
  },
  "paper": "2609.25433",
  "adapter": "light-heads",
  "dataset": "MovieLens 100K",
  "protocol": "per-user chronological 70/15/15; fixed 120 base + 80 head steps; no test-based selection",
  "evaluation_tier": "l2_public_dataset",
  "seeds": [
    42,
    43,
    44
  ],
  "train_rows": 69572,
  "validation_rows": 14973,
  "test_rows": 15455,
  "test_auc": {
    "light_head_main": [
      0.6304891823,
      0.6517774982,
      0.6433407694
    ],
    "light_head_new_task": [
      0.4485702052,
      0.5775707737,
      0.5065805969
    ],
    "no_reset_new_task": [
      0.6096563253,
      0.6387191577,
      0.6315765597
    ],
    "no_stop_gradient_main": [
      0.610267527,
      0.6391421777,
      0.623892523
    ],
    "no_stop_gradient_new_task": [
      0.5918222184,
      0.625555402,
      0.6232191109
    ]
  },
  "interpretation": "在此短预算公开评分任务上，重置轻头降低了新任务 AUC；去掉 stop-gradient 降低原任务 AUC。负结果保留，不声称复现 YouTube 线上提升。",
  "manifest_ref": "reproduction:light-heads"
}