{
  "paper": "Rec-Distill",
  "arxiv_id": "2605.29755",
  "dataset": "MovieLens 100K",
  "seed": 42,
  "configuration": {
    "materialized_examples": 12000,
    "teacher_dimensions": 96,
    "student_dimensions": 48,
    "batch_steps": 160,
    "stream_steps": 80,
    "selected_distillation_weight": 3.0,
    "cached_teacher_signal_mb": 0.384
  },
  "validation_ndcg_by_alpha": {
    "0.1": 0.003795163339796475,
    "0.3": 0.003795163339796475,
    "1.0": 0.003829823573347283,
    "3.0": 0.003909575546688153
  },
  "results": {
    "large_teacher": {
      "hit_at_10": 0.02467811158798283,
      "ndcg_at_10": 0.012126696748482227,
      "head_share_at_10": 0.5144849785407726
    },
    "raw_student": {
      "hit_at_10": 0.008583690987124463,
      "ndcg_at_10": 0.00389197173941706,
      "head_share_at_10": 0.2715665236051502
    },
    "rec_distill_student": {
      "hit_at_10": 0.0075107296137339056,
      "ndcg_at_10": 0.003553490111964562,
      "head_share_at_10": 0.25761802575107295
    }
  },
  "transferability": -0.0411041810236385,
  "conclusion": "The teacher was stronger, but validation-selected black-box batch/stream distillation did not transfer its gain to the local student.",
  "schema_version": 2,
  "manifest_ref": "reproduction:rec-distill",
  "evaluation_protocol": {
    "tier": "l3_paper_pipeline",
    "seeds": [
      42
    ],
    "formal_comparison": false,
    "claim_policy": "single/few-seed smoke result; do not claim a stable improvement"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/2605.29755-rec-distill/metrics/movielens-100k-seed42.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}