{
  "status": "concept-only-not-print-approved",
  "dimensions_mm": {
    "front_section_nominal": [
      26,
      31,
      18.2
    ],
    "rear_body": [
      44,
      82,
      10
    ],
    "bridge_nominal_width": 20,
    "bridge_wall_radial": 3.2,
    "closed_pad_gap": 0.8,
    "front_with_pads": [
      26.65,
      34.06,
      20.16
    ],
    "rear_with_pads": [
      45.15,
      82.0,
      11.6
    ],
    "front_including_bridge_height": 42.49,
    "bridge_max_height_y": 26.632
  },
  "magnet_candidate": {
    "shape": "disc",
    "diameter_mm": 5,
    "thickness_mm": 1.5,
    "count": 4,
    "grade": "unselected",
    "force": "unmeasured; do not buy from this concept alone"
  },
  "battery_nominal_mm": [
    34,
    50,
    5
  ],
  "battery_reserve_mm": [
    36,
    52,
    6
  ],
  "sampled_extra_openings_mm": [
    0,
    2,
    4,
    6,
    8
  ],
  "checks": [
    {
      "pair": "front-shell/official-hardware",
      "overlap_mm3": 0
    },
    {
      "pair": "front-lid/official-hardware",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-shell/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-shell/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-lid/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-lid/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "antenna/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "front-shell/front-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-shell/rear-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "switch-body/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "switch-body/rear-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "switch-body/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "switch-body/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "switch-pins/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "switch-pins/rear-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "switch-pins/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "switch-pins/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "local-positive/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "local-positive/rear-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "local-positive/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "local-positive/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel-0/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel-0/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel-0/rear-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel-0/rear-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel-0/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel-0/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel-0/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel-0/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel-0/switch-body",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel-0/switch-body",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel-0/switch-pins",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel-0/switch-pins",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel-0/stem",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--1/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--1/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--1/rear-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--1/rear-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--1/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--1/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--1/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--1/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--1/switch-body",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--1/switch-body",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--1/switch-pins",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--1/switch-pins",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--1/stem",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--2/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--2/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--2/rear-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--2/rear-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--2/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--2/battery-reserve",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--2/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--2/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--2/switch-body",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--2/switch-body",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--2/switch-pins",
      "overlap_mm3": 0
    },
    {
      "pair": "stem-travel--2/switch-pins",
      "overlap_mm3": 0
    },
    {
      "pair": "slider-travel--2/stem",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-positive/switch-body",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-positive/switch-pins",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-positive/slider",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-negative/switch-body",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-negative/switch-pins",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-negative/slider",
      "overlap_mm3": 0
    },
    {
      "pair": "antenna-coax/switch-body",
      "overlap_mm3": 0
    },
    {
      "pair": "antenna-coax/switch-pins",
      "overlap_mm3": 0
    },
    {
      "pair": "antenna-coax/slider",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-positive/front-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-negative/front-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "antenna-coax/front-lid",
      "overlap_mm3": 0
    },
    {
      "pair": "front-magnet-left/shell",
      "overlap_mm3": 0
    },
    {
      "pair": "front-magnet-left/protected-hardware",
      "overlap_mm3": 0
    },
    {
      "pair": "front-magnet-left/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-magnet-left/shell",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-magnet-left/protected-hardware",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-magnet-left/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "front-magnet-right/shell",
      "overlap_mm3": 0
    },
    {
      "pair": "front-magnet-right/protected-hardware",
      "overlap_mm3": 0
    },
    {
      "pair": "front-magnet-right/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-magnet-right/shell",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-magnet-right/protected-hardware",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-magnet-right/antenna",
      "overlap_mm3": 0
    },
    {
      "pair": "front-magnet-left/pad-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-magnet-left/pad-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "front-magnet-right/pad-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "rear-magnet-right/pad-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-positive/front-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-positive/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-negative/front-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "battery-negative/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "antenna-coax/front-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "antenna-coax/rear-shell",
      "overlap_mm3": 0
    },
    {
      "pair": "front-shell/rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "bridge/front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "bridge/rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "bridge/front-hardware",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "bridge/rear-antenna",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "battery-positive/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "battery-positive/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "battery-positive/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "battery-negative/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "battery-negative/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "battery-negative/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "antenna-coax/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "antenna-coax/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "antenna-coax/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 0
    },
    {
      "pair": "front-shell/rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "bridge/front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "bridge/rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "bridge/front-hardware",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "bridge/rear-antenna",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "battery-positive/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "battery-positive/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "battery-positive/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "battery-negative/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "battery-negative/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "battery-negative/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "antenna-coax/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "antenna-coax/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "antenna-coax/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 2
    },
    {
      "pair": "front-shell/rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "bridge/front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "bridge/rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "bridge/front-hardware",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "bridge/rear-antenna",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "battery-positive/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "battery-positive/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "battery-positive/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "battery-negative/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "battery-negative/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "battery-negative/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "antenna-coax/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "antenna-coax/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "antenna-coax/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 4
    },
    {
      "pair": "front-shell/rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "bridge/front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "bridge/rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "bridge/front-hardware",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "bridge/rear-antenna",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "battery-positive/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "battery-positive/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "battery-positive/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "battery-negative/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "battery-negative/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "battery-negative/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "antenna-coax/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "antenna-coax/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "antenna-coax/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 6
    },
    {
      "pair": "front-shell/rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "bridge/front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "bridge/rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "bridge/front-hardware",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "bridge/rear-antenna",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "battery-positive/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "battery-positive/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "battery-positive/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "battery-negative/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "battery-negative/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "battery-negative/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "antenna-coax/bridge-wall",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "antenna-coax/bridge-front-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    },
    {
      "pair": "antenna-coax/bridge-rear-shell",
      "overlap_mm3": 0,
      "extra_opening_mm": 8
    }
  ],
  "parts": {
    "front-magnet-left": {
      "valid": true,
      "solids": 1,
      "role": "magnet"
    },
    "front-pad-cap-left": {
      "valid": true,
      "solids": 1,
      "role": "pad"
    },
    "rear-magnet-left": {
      "valid": true,
      "solids": 1,
      "role": "magnet"
    },
    "rear-pad-cap-left": {
      "valid": true,
      "solids": 1,
      "role": "pad"
    },
    "front-magnet-right": {
      "valid": true,
      "solids": 1,
      "role": "magnet"
    },
    "front-pad-cap-right": {
      "valid": true,
      "solids": 1,
      "role": "pad"
    },
    "rear-magnet-right": {
      "valid": true,
      "solids": 1,
      "role": "magnet"
    },
    "rear-pad-cap-right": {
      "valid": true,
      "solids": 1,
      "role": "pad"
    },
    "front-shell": {
      "valid": true,
      "solids": 1,
      "role": "shell"
    },
    "front-lid": {
      "valid": true,
      "solids": 1,
      "role": "shell"
    },
    "rear-battery-shell": {
      "valid": true,
      "solids": 1,
      "role": "shell"
    },
    "rear-lid": {
      "valid": true,
      "solids": 1,
      "role": "shell"
    },
    "xiao-official-board-and-flex": {
      "valid": true,
      "solids": 101,
      "role": "hardware"
    },
    "camera-original-position": {
      "valid": true,
      "solids": 2,
      "role": "hardware"
    },
    "battery-503450-nominal": {
      "valid": true,
      "solids": 1,
      "role": "hardware"
    },
    "fpc-antenna-provisional": {
      "valid": true,
      "solids": 1,
      "role": "hardware"
    },
    "slide-switch-body-envelope": {
      "valid": true,
      "solids": 1,
      "role": "switch"
    },
    "slide-switch-terminal-envelopes": {
      "valid": true,
      "solids": 3,
      "role": "switch"
    },
    "slide-switch-moving-stem": {
      "valid": true,
      "solids": 1,
      "role": "switch"
    },
    "same-color-power-slider": {
      "valid": true,
      "solids": 1,
      "role": "slider"
    },
    "replaceable-tpu-bridge": {
      "valid": true,
      "solids": 1,
      "role": "bridge"
    },
    "battery-to-switch-positive": {
      "valid": true,
      "solids": 5,
      "role": "wire"
    },
    "battery-positive-rear": {
      "valid": true,
      "solids": 9,
      "role": "wire"
    },
    "battery-positive-front": {
      "valid": true,
      "solids": 7,
      "role": "wire"
    },
    "battery-positive-bridge": {
      "valid": true,
      "solids": 1,
      "role": "wire"
    },
    "battery-negative-rear": {
      "valid": true,
      "solids": 7,
      "role": "wire"
    },
    "battery-negative-front": {
      "valid": true,
      "solids": 7,
      "role": "wire"
    },
    "battery-negative-bridge": {
      "valid": true,
      "solids": 1,
      "role": "wire"
    },
    "antenna-coax-rear": {
      "valid": true,
      "solids": 5,
      "role": "wire"
    },
    "antenna-coax-front": {
      "valid": true,
      "solids": 5,
      "role": "wire"
    },
    "antenna-coax-bridge": {
      "valid": true,
      "solids": 1,
      "role": "wire"
    }
  },
  "routing": [
    {
      "name": "battery-positive",
      "bridge_length_mm": 32.3066,
      "total_route_mm": 105.845,
      "sample_length_range_mm": [
        32.30662287636556,
        32.30662287715765
      ]
    },
    {
      "name": "battery-negative",
      "bridge_length_mm": 32.3066,
      "total_route_mm": 105.018,
      "sample_length_range_mm": [
        32.30662287636556,
        32.30662287715765
      ]
    },
    {
      "name": "antenna-coax",
      "bridge_length_mm": 32.3066,
      "total_route_mm": 57.848,
      "sample_length_range_mm": [
        32.30662287636556,
        32.30662287715765
      ]
    }
  ],
  "limitations": [
    "Concept only. No printing, ordering or functional wear approval.",
    "No pin, spring, hinge knuckle or rigid hinge cowl is used.",
    "TPU bridge has modeled T-end sockets and three separate wire channels. TPU grade, print orientation, pull-out retention and fatigue remain unverified.",
    "Slider translates the rear shell and fits a constant centerline length. It is NOT a TPU constitutive simulation or proof of minimum bend radius, fatigue or fabric compatibility.",
    "Magnet discs are size placeholders, not a selected grade or validated clamping force. Soft cap retention, polarity and retention against swallowing require engineering.",
    "Magnet loads go through shell pockets; do not test clamping or drops with a soft pouch cell installed.",
    "Antenna body detuning, magnets, battery and worn radio performance remain unverified.",
    "Terminal points, insulated wire diameters, actual battery lead length and connector keep-outs require physical measurement.",
    "Board mounting, lid fastening, acoustics and endpoint strain relief are not finalized. T-sockets are not electrical strain relief.",
    "The bridge is replaceable only after opening the shells and disconnecting or unthreading the wires; it is not hot-swappable."
  ],
  "power_control": {
    "mode": "mechanical-battery-disconnect",
    "candidate": "G-Switch SS-12D01-G040 / C2876014",
    "switch_body_axes_xyz_mm": [
      3.5,
      8.8,
      3.9
    ],
    "stem_mm": 4,
    "slider_face_mm": [
      7,
      3.5
    ],
    "slider_travel_mm": 2,
    "protrusion_from_side_mm": 1.15,
    "geometry_status": "Simplified dimensional envelope; not manufacturer STEP. Pin, ear, socket and solder clearances require sample verification.",
    "wiring": [
      "Battery protected positive -> common contact",
      "Selected switched contact -> XIAO BAT+",
      "Battery negative -> XIAO BAT-",
      "Unused contact individually insulated"
    ],
    "charging": "Switch ON to charge. USB independently powers XIAO; unplug USB before a full power cycle.",
    "antenna_depth_shift_mm": 2.2,
    "limitations": [
      "Cradle and slider are layout candidates, not validated retention or print-ready fits.",
      "Terminal insulation, bend space and strain relief need hardware fit confirmation.",
      "Camera/WiFi startup current and DC contact suitability must be verified before electrical acceptance.",
      "Switch model does not include metal fixing ears; reserve is illustrative, not full hardware clearance proof."
    ]
  },
  "styling_comparison": {
    "method": "Closed exterior body before holes, sockets and magnet bosses; NOT internal free volume or assembly volume",
    "previous_body_envelope_mm3": 18610.796,
    "current_body_envelope_mm3": 12756.433,
    "body_envelope_reduction_percent": 31.5,
    "hardware_unchanged": true,
    "front_shape": "rounded lower tub and narrowing lofted dome"
  },
  "check_summary": {
    "checked": 164,
    "passed": 164,
    "tolerance_mm3": 0.001
  }
}