{
  "status": "concept-only-not-print-approved",
  "dimensions_mm": {
    "front_body": [
      28,
      64,
      20
    ],
    "rear_body": [
      40,
      58,
      10
    ],
    "hinge_axis_height": 38.0,
    "pin_nominal_diameter": 2,
    "pin_bore": 2.3
  },
  "battery_nominal_mm": [
    34,
    50,
    5
  ],
  "battery_reserve_mm": [
    36,
    52,
    6
  ],
  "intersections_mm3": {
    "front_shell_hardware": 0,
    "front_lid_hardware": 0,
    "front_shell_antenna": 0,
    "front_lid_antenna": 0,
    "antenna_hardware": 0,
    "rear_shell_battery_reserve": 0,
    "rear_lid_battery_reserve": 0,
    "closed_shells": 0,
    "closed_pads": 0
  },
  "parts": {
    "front-shell": {
      "valid": true,
      "solids": 1
    },
    "front-lid": {
      "valid": true,
      "solids": 1
    },
    "rear-battery-shell": {
      "valid": true,
      "solids": 1
    },
    "rear-lid": {
      "valid": true,
      "solids": 1
    },
    "xiao-official-board-and-flex": {
      "valid": true,
      "solids": 101
    },
    "camera-original-position": {
      "valid": true,
      "solids": 2
    },
    "battery-503450-nominal": {
      "valid": true,
      "solids": 1
    },
    "fpc-antenna-provisional": {
      "valid": true,
      "solids": 1
    },
    "front-soft-pad": {
      "valid": true,
      "solids": 1
    },
    "rear-soft-pad": {
      "valid": true,
      "solids": 1
    },
    "metal-pin-placeholder": {
      "valid": true,
      "solids": 1
    },
    "spring-coil-placeholder": {
      "valid": true,
      "solids": 1
    }
  },
  "limitations": [
    "First spatial concept, not a print-ready functional assembly.",
    "Original camera, board and ribbon geometry kept together without relocation.",
    "Spring is a coil-only placeholder: legs, rate, preload and fatigue are not engineered.",
    "Slider is a visualization, not verified fabric-thickness compatibility or clamp force.",
    "Covers have no final fasteners or retention; board support and wire strain relief are not detailed.",
    "Microphone and LED openings are placeholders, not verified acoustic paths or light pipes.",
    "FPC projection overlaps part of the board; clearance is not RF validation.",
    "Battery is nominal; finished pouch, protection PCB and wire dimensions require measurement.",
    "No final mechanical travel stops, pinch protection, or validated flexible wire routing.",
    "No installed switch selection; never wear or charge an unvalidated prototype."
  ]
}