{
  "schema": "cad.cdsl.llm.v1",
  "schema_version": "1.0.0",
  "kind": "part",
  "part_id": "b005",
  "features": [
    {
      "id": "f01",
      "atomic_id": "extrude_add_blind",
      "depends_on": [],
      "name": "凸台-拉伸1",
      "params": {
        "distance_mm": 20.0,
        "reverse": true
      },
      "sketch_id": "sketch_001"
    },
    {
      "id": "f02",
      "atomic_id": "extrude_cut_blind",
      "depends_on": ["f01"],
      "name": "切除-拉伸1",
      "params": {
        "distance_mm": 8.0
      },
      "sketch_id": "sketch_002"
    }
  ],
  "geometry": {
    "sketches": [
      {
        "id": "sketch_001",
        "name": "草图1",
        "workplane": {
          "origin_mm": [0.0, 0.0, 0.0],
          "x_dir": [1.0, 0.0, 0.0],
          "y_dir": [0.0, 0.0, 1.0],
          "normal": [0.0, -1.0, 0.0]
        },
        "profile": {
          "type": "circle",
          "center": [0.0, 0.0],
          "radius_mm": 25.0
        }
      },
      {
        "id": "sketch_002",
        "name": "草图2",
        "workplane": {
          "origin_mm": [0.0, 20.0, 0.0],
          "x_dir": [1.0, 0.0, 0.0],
          "y_dir": [0.0, 0.0, 1.0],
          "normal": [0.0, -1.0, 0.0]
        },
        "profile": {
          "type": "partial_ring_with_arc_island",
          "inner_radius_mm": 10.0,
          "outer_radius_mm": 20.0,
          "half_angle_deg": 45.0,
          "island_radius_mm": 12.265,
          "island_gap_mm": 1.0,
          "center_angles_deg": [90.0, -90.0]
        }
      }
    ]
  },
  "meta": {
    "source": "b005.solidworks_evidence_v2.json",
    "parameterized_sketches": 2,
    "profile_from_sketches": 0,
    "notes": [
      "CDSL-only drawable: profiles expand via shape generators; no compiler_context required",
      "Cut regions = annular sectors minus constant-width arc islands on outer chords"
    ]
  }
}