{
  "caseId": "chat-l0-domain-hint",
  "query": "Should L0 keyword matching decide the final retrieval result?",
  "retrievedAt": "2026-07-05T00:00:00Z",
  "candidates": [
    {
      "rank": 1,
      "docId": "rag-l0-domain-entity-hint",
      "title": "RAG L0 Domain Entity Hint",
      "breadcrumb": "RAG > L0 > Domain Entity Hint",
      "content": "L0 should be retained as a domain detector, entity extractor, metadata filter generator, and explainability signal, not as the final retrieval decision.",
      "score": 0.88,
      "retrievalLayer": "L0"
    },
    {
      "rank": 2,
      "docId": "rag-l0-l1-fusion-ranking",
      "title": "RAG L0 L1 Fusion Ranking",
      "breadcrumb": "RAG > Ranking > Fusion",
      "content": "L0 and L1 candidates should eventually be fused rather than handled as an early-return branch.",
      "score": 0.75,
      "retrievalLayer": "L1"
    }
  ]
}