{
  "chunks": [],
  "answer": null,
  "concepts": [],
  "sufficiency": "RlmInsufficient",
  "sufficiency_explanation": "No chunks or knowledge-graph concepts matched the query; there is nothing to synthesise an answer from.",
  "stats": {
    "search_latency_ms": 4,
    "rlm_latency_ms": null,
    "chunks_returned": 0,
    "kg_hits": 0
  }
}