{
  "schema_version": "1.0",
  "request": "生成模数2、20齿、12毫米厚、中心孔12毫米的人字齿轮，导出STEP并保留可重放模型图",
  "selected_backend": "simplecadapi",
  "runner_skill": "simplecadapi",
  "confidence": "high",
  "backend_scores": [
    {
      "backend": "simplecadapi",
      "score": 175,
      "reasons": [
        "+20 specialist mechanical baseline",
        "+65 supported standard mechanical family",
        "+60 replay, semantic graph, or FreeCAD requirement",
        "+30 OCP STEP export requested"
      ]
    },
    {
      "backend": "build123d",
      "score": 78,
      "reasons": [
        "+35 general STEP-first default",
        "+8 can model the family generically",
        "+35 editable STEP requested"
      ]
    },
    {
      "backend": "cadam",
      "score": -60,
      "reasons": [
        "+10 printable CSG baseline",
        "-70 no native editable STEP output"
      ]
    }
  ],
  "fallback_order": [
    "build123d",
    "cadam"
  ],
  "workflow_profiles": [
    "caddesigner_ecip"
  ],
  "downstream_skills": [
    "cad-viewer"
  ],
  "requested_outputs": [
    "step"
  ],
  "source_of_truth": "SimpleCADAPI Python generator and model JSON",
  "availability": {
    "build123d": {
      "available": true,
      "probe": "python=/Users/jerry/linkhand/CadSet/text-to-cad/.venv/bin/python"
    },
    "simplecadapi": {
      "available": true,
      "probe": "python=/Users/jerry/linkhand/CadSet/text-to-cad/.venv/bin/python"
    },
    "cadam": {
      "available": true,
      "probe": "/Users/jerry/linkhand/CadSet/CADAM"
    }
  }
}