{
  "schema_version": "1.0",
  "model_spec_kind": "parametric_cad_model",
  "model_id": "imported_015240",
  "units": "mm",
  "reconstruction": {
    "mode": "exact_step_base",
    "source": {
      "path": "source.step",
      "sha256": "55aee6a0ad74435503a1e7f108b32c9f403ae9838933e2be6728fb5b2f5cfbd4",
      "geometry_signature": {
        "size_mm": [
          26.200001497,
          18.906424738,
          28.2
        ],
        "center_mm": [
          13.100000748,
          7.453212369,
          -0.0
        ],
        "solid_count": 1,
        "face_count": 31,
        "edge_count": 87,
        "volume_mm3": 2400.466496
      }
    },
    "history_recovery": {
      "status": "not_present_in_step",
      "contract": "Preserve the imported B-Rep exactly as the immutable base; represent later edits as named parametric modifications."
    }
  },
  "parameters": {
    "selected_face_extension": {
      "value": 1.0,
      "unit": "mm",
      "role": "outward_offset_of_source_face_f22",
      "source_face": "#f22",
      "direction": "+Z"
    },
    "target_hole_diameter": {
      "value": 3.6,
      "unit": "mm",
      "role": "diameter_of_circled_horizontal_plate_hole",
      "source_diameter_mm": 4.799996,
      "axis": "Z"
    }
  },
  "modifications": [
    {
      "id": "extend_selected_face_f22",
      "operation": "add_box",
      "source_face": "#f22",
      "direction": "+Z",
      "center": [
        13.1,
        -1.0,
        {
          "parameter": "selected_face_extension",
          "scale": 0.5,
          "offset": 14.1
        }
      ],
      "size": [
        22.2,
        2.0,
        {
          "parameter": "selected_face_extension"
        }
      ],
      "enabled": true
    },
    {
      "id": "fill_original_circled_hole",
      "operation": "add_cylinder",
      "axis": "z",
      "center": [
        5.9,
        11.006425,
        0.0
      ],
      "diameter": 4.799996,
      "length": 4.0,
      "enabled": true
    },
    {
      "id": "cut_resized_circled_hole",
      "operation": "cut_cylinder",
      "axis": "z",
      "center": [
        5.9,
        11.006425,
        0.0
      ],
      "diameter": {
        "parameter": "target_hole_diameter"
      },
      "length": 6.0,
      "enabled": true
    }
  ],
  "outputs": {
    "step": "imported_015240.step",
    "stl": "imported_015240.stl"
  },
  "validation": {
    "exact_base_required": true,
    "geometry_signature_tolerance_mm": 1e-07
  }
}