what is most prominent food crop in this region?

{
  "result": {
    "kind": "research.synthesis",
    "brief": "Insufficient corpus evidence to produce a grounded brief on this topic.",
    "query": "what is most prominent food crop in this region?",
    "summary": "Insufficient corpus evidence for this query.",
    "sources": [],
    "upstreamStep": "research",
    "privacy": "restricted",
    "evidenceStatus": "insufficient",
    "reason": "no_strong_topical_match",
    "corpusScope": "tenant:horticulturist"
  },
  "usefulness": {
    "usefulnessScore": 0.58,
    "usefulnessBand": "fair",
    "dimensions": {
      "goalAlignment": 0.72,
      "nonFiller": 0.92,
      "specificity": 0.38,
      "structure": 0.55,
      "grounding": 0.12
    },
    "flags": [
      "insufficient_evidence",
      "thin_sources"
    ],
    "rationale": "Explicit insufficient-evidence result for an uncovered topic. Scored as an honest non-filler refusal, not as a grounded brief.",
    "scorerVersion": "1.0.0"
  },
  "trust": {
    "updates": [
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        "outcomeSignals": {
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        },
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        "trustAfter": 0.675,
        "sampleSizeAfter": 46
      },
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          "usefulness": 0.58
        },
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        "trustAfter": 0.768,
        "sampleSizeAfter": 57
      }
    ]
  },
  "ranking": null,
  "economic": {
    "quote": {
      "total": 0.6,
      "baseFee": 1,
      "currency": "USD",
      "adjustments": [
        {
          "code": "insufficient_evidence",
          "label": "Insufficient evidence — reduced fee",
          "amount": -0.4
        }
      ],
      "pricingVersion": "econ-v0"
    },
    "slice": {
      "label": "Economic v0 Slice A — frozen",
      "frozen": true,
      "version": "0.0.0",
      "pricingVersion": "econ-v0"
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    "rewards": [
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        "reputationSampleSize": 46
      },
      {
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        "modifierApplied": true,
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      }
    ],
    "reputationInputs": {
      "label": "Reputation v1 — frozen",
      "applied": true,
      "version": "Reputation v1",
      "readOnly": true
    }
  },
  "retrievalDebug": {
    "query": "what is most prominent food crop in this region?",
    "corpusHits": [
      "doc:tenant:horticulturist:C1",
      "doc:tenant:horticulturist:C6",
      "doc:tenant:horticulturist:C14",
      "doc:tenant:horticulturist:C10"
    ],
    "corpusScope": "tenant:horticulturist",
    "fallbackUsed": false,
    "topCandidates": [
      {
        "id": "doc:tenant:horticulturist:C1",
        "tags": [
          "lrgv"
        ],
        "score": 11,
        "strong": true,
        "matchedTerms": [
          "region"
        ]
      },
      {
        "id": "doc:tenant:horticulturist:C6",
        "tags": [
          "statewide"
        ],
        "score": 11,
        "strong": true,
        "matchedTerms": [
          "most"
        ]
      },
      {
        "id": "doc:tenant:horticulturist:C14",
        "tags": [
          "statewide"
        ],
        "score": 8,
        "strong": true,
        "matchedTerms": [
          "region"
        ]
      },
      {
        "id": "doc:tenant:horticulturist:C10",
        "tags": [
          "statewide"
        ],
        "score": 3,
        "strong": true,
        "matchedTerms": [
          "region"
        ]
      }
    ],
    "guardTriggered": false,
    "selectedSources": [
      "doc:tenant:horticulturist:C1"
    ]
  },
  "corpusMembership": [
    {
      "id": "doc:audit-event-model",
      "found": true
    },
    {
      "id": "doc:agent-version-provenance",
      "found": true
    },
    {
      "id": "doc:source-lineage",
      "found": true
    },
    {
      "id": "doc:result-claim-provenance",
      "found": true
    },
    {
      "id": "doc:platform-provenance-capabilities",
      "found": true
    }
  ],
  "retrievalBreakpoint": "not_in_candidates"
}