{
  "artifact": "NCM_RETRIEVAL_EVALUATION_V3",
  "baseline_artifact": "NCM_RETRIEVAL_EVALUATION_V2",
  "activation": "NOT_ACTIVATED_PENDING_FULL_HOLDOUT_REPLAY",
  "gold_recall_at_1_before": 0.7846,
  "gold_recall_at_20_before": 0.9538,
  "gold_mrr_before": 0.8392,
  "gold_recall_at_1_after": 0.7846,
  "gold_recall_at_20_after": 0.9538,
  "gold_mrr_after": 0.8392,
  "local_embeddings_used": false,
  "local_embeddings_improvement": null,
  "evidence_features": [
    "BM25-compatible lexical baseline",
    "word/character evidence hooks",
    "token rarity",
    "hierarchy",
    "KB neighbors",
    "GTIN",
    "product group"
  ],
  "policy": "retain V2 until a complete untouched holdout replay proves recall_at_20 >= 0.954 and no regression"
}