{
  "version": "v0.2-phase2a",
  "label": "baseline_snapshot",
  "date": "2026-05-23",
  "snapshot": {
    "doc_id_max": 25180,
    "chunk_id_max": 56526,
    "documents_n": 21365,
    "chunks_n": 30605
  },
  "eval_set": {
    "total_cases": 51,
    "scored_cases": 46,
    "failure_expected_cases": 5
  },
  "model_config": {
    "embedding": "BAAI/bge-m3 (production)",
    "reranker": "BAAI/bge-reranker-v2-m3",
    "search_mode": "hybrid",
    "rerank_enabled": "server_default",
    "embedding_backend": "baseline",
    "plan": "phase-2a-embedding-diagnose.md v4"
  },
  "overall": {
    "n": 46,
    "graded_ndcg_at_10": 0.659,
    "graded_recall_at_10_t2": 0.695,
    "graded_recall_at_10_t3": 0.761,
    "latency_p50_ms": 464,
    "latency_p95_ms": 1582,
    "failure_correct": "0/5"
  },
  "by_category": {
    "english_only":  { "n":  9, "recall_at_10": 0.78, "ndcg_at_10": 0.71, "graded_ndcg_at_10": 0.78 },
    "exam":          { "n":  7, "recall_at_10": 0.57, "ndcg_at_10": 0.62, "graded_ndcg_at_10": 0.74 },
    "korean_only":   { "n":  9, "recall_at_10": 0.55, "ndcg_at_10": 0.47, "graded_ndcg_at_10": 0.51 },
    "mixed":         { "n": 10, "recall_at_10": 0.38, "ndcg_at_10": 0.36, "graded_ndcg_at_10": 0.39 },
    "standards":     { "n": 11, "recall_at_10": 0.91, "ndcg_at_10": 0.85, "graded_ndcg_at_10": 0.87 }
  },
  "by_language": {
    "en":    { "n":  9, "recall_at_10": 0.78, "graded_ndcg_at_10": 0.78 },
    "ko":    { "n": 27, "recall_at_10": 0.70, "graded_ndcg_at_10": 0.72 },
    "mixed": { "n": 10, "recall_at_10": 0.38, "graded_ndcg_at_10": 0.39 }
  },
  "raw_csv": "reports/v0_2_phase2a_baseline_snapshot_2026-05-23.csv"
}
