{
  "schema_version": "1.0",
  "request": "根据六张无尺寸参考图生成六个外形相似的轴类零件；尺寸按图片比例推定，不要求 1:1。",
  "route": {
    "selected_backend": "build123d",
    "runner_skill": "cad",
    "project": "text-to-cad",
    "fallback_order": ["simplecadapi", "cadam"],
    "workflow_profiles": ["caddesigner_ecip", "requirement_refinement", "visual_repair"]
  },
  "source": {
    "paths": [
      "001957_like.py",
      "004910_like.py",
      "054964_like.py",
      "061119_like.py",
      "067249_like.py",
      "086237_like.py"
    ],
    "format": "python",
    "backend": "build123d"
  },
  "artifacts": [
    {"path": "001957_like.step", "role": "primary"},
    {"path": "001957_like.stl", "role": "secondary"},
    {"path": "004910_like.step", "role": "primary"},
    {"path": "004910_like.stl", "role": "secondary"},
    {"path": "054964_like.step", "role": "primary"},
    {"path": "054964_like.stl", "role": "secondary"},
    {"path": "061119_like.step", "role": "primary"},
    {"path": "061119_like.stl", "role": "secondary"},
    {"path": "067249_like.step", "role": "primary"},
    {"path": "067249_like.stl", "role": "secondary"},
    {"path": "086237_like.step", "role": "primary"},
    {"path": "086237_like.stl", "role": "secondary"}
  ],
  "parameters": {
    "001957_like": {"overall_length": 337.0, "max_diameter": 32.0},
    "004910_like": {"overall_length": 120.0, "diameter": 18.0, "recess_diameter": 6.0},
    "054964_like": {"overall_length": 90.0, "shaft_diameter": 16.0, "head_diameter": 24.0},
    "061119_like": {"overall_length": 115.0, "body_diameter": 18.0},
    "067249_like": {"overall_length": 86.85, "roller_diameter": 28.0, "nominal_thread_diameter": 10.0},
    "086237_like": {"overall_length": 342.0, "max_diameter": 22.0}
  },
  "assumptions": [
    "All dimensions are inferred in millimetres from image proportions; the images contain no reliable scale.",
    "The models are shape studies, not production drawings or tolerance specifications.",
    "067249 uses annular ribs as a lightweight visual thread indication, not a standards-compliant helical thread.",
    "Small edge rounds and chamfers visible in renders are omitted unless they materially control the silhouette."
  ],
  "validation": [
    "All six build123d generators returned one valid solid before export.",
    "All six STEP artifacts passed inspect refs --facts --planes --positioning with ok=true and no warnings.",
    "Exported STEP bounds matched the inferred design envelopes: 337x32x32, 120x18x18, 90x24x24, 115x18x18, 86.85x28x28, and 342x22x22 mm (mesh-derived inspection values differ by under 0.02 mm on circular axes).",
    "ISO and front snapshot packets were rendered and reviewed for all six parts."
  ],
  "viewer_links": [
    "http://127.0.0.1:4178/?dir=%2FUsers%2Fjerry%2Flinkhand%2FCadSet%2Ftext-to-cad%2Fmodels%2Fcad-router-v1%2Fshaft_reference_set_v1&file=001957_like.step",
    "http://127.0.0.1:4178/?dir=%2FUsers%2Fjerry%2Flinkhand%2FCadSet%2Ftext-to-cad%2Fmodels%2Fcad-router-v1%2Fshaft_reference_set_v1&file=004910_like.step",
    "http://127.0.0.1:4178/?dir=%2FUsers%2Fjerry%2Flinkhand%2FCadSet%2Ftext-to-cad%2Fmodels%2Fcad-router-v1%2Fshaft_reference_set_v1&file=054964_like.step",
    "http://127.0.0.1:4178/?dir=%2FUsers%2Fjerry%2Flinkhand%2FCadSet%2Ftext-to-cad%2Fmodels%2Fcad-router-v1%2Fshaft_reference_set_v1&file=061119_like.step",
    "http://127.0.0.1:4178/?dir=%2FUsers%2Fjerry%2Flinkhand%2FCadSet%2Ftext-to-cad%2Fmodels%2Fcad-router-v1%2Fshaft_reference_set_v1&file=067249_like.step",
    "http://127.0.0.1:4178/?dir=%2FUsers%2Fjerry%2Flinkhand%2FCadSet%2Ftext-to-cad%2Fmodels%2Fcad-router-v1%2Fshaft_reference_set_v1&file=086237_like.step"
  ]
}