{
  "id": "caster_wheel_fork",
  "level": "easy",
  "family": "hardware",
  "prompt": "Design a small caster wheel assembly as editable code-CAD. Include a wheel, axle, U-shaped fork, swivel stem, and top mounting plate with four holes.",
  "image_prompt": "Realistic product render of a small caster wheel assembly with wheel, axle, U-shaped fork, swivel stem, and top mounting plate, plain white background, no text.",
  "semantic_hints": [
    "caster",
    "wheel",
    "axle",
    "u_fork",
    "swivel_stem",
    "mounting_plate",
    "four_holes"
  ],
  "bbox_mm": [
    90,
    80,
    130
  ]
}