{
  "id": "micro_drone_frame",
  "level": "hard",
  "family": "robotics",
  "prompt": "Design a lightweight micro-drone frame as editable code-CAD. Include a central electronics plate, four arms, four motor bosses, screw holes, wire channels, and curved protective guards.",
  "image_prompt": "Realistic CAD render of a lightweight micro drone frame with central plate, four arms, motor bosses, screw holes, wire channels, and curved guards, white background, no text.",
  "semantic_hints": [
    "drone_frame",
    "central_plate",
    "four_arm",
    "motor_boss",
    "screw_hole",
    "wire_channel",
    "protective_guard"
  ],
  "bbox_mm": [
    180,
    180,
    28
  ]
}