{
  "id": "origami",
  "title": "A living utility edge, not a folding house",
  "subtitle": "Rigid accordion + breathing composite skin + removable resource circuits",
  "overview": "A proposed six-leaf deployable solar/shade layer wraps a stable service vertebra. Inspect real pivots, finite panel thickness, guide portal, independent locks, removable valley drainage and a FlectoLine-inspired pneumatic skin coupon. The roof mechanism is geometrically exact under its synchronized-angle constraint; its structural ratings and autonomous controls are not validated.",
  "camera": {
    "position": [
      4.8,
      3.5,
      5.5
    ],
    "target": [
      0.95,
      1.45,
      0
    ]
  },
  "groups": [
    {
      "id": "service-edge",
      "parent": null,
      "position": [
        -0.36,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        -0.65,
        0,
        0
      ],
      "label": "Stable service vertebra \u2014 wet circuits stay here"
    },
    {
      "id": "cassette-0",
      "parent": "service-edge",
      "position": [
        0.02,
        0.52,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0,
        0.5
      ],
      "label": "Rain first-flush / nonpotable buffer"
    },
    {
      "id": "cassette-1",
      "parent": "service-edge",
      "position": [
        0.02,
        0.96,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0,
        -0.5
      ],
      "label": "24 V power and isolation"
    },
    {
      "id": "cassette-2",
      "parent": "service-edge",
      "position": [
        0.02,
        1.4,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0,
        0.5
      ],
      "label": "Control / valves cassette"
    },
    {
      "id": "end-carriage",
      "parent": null,
      "position": [
        2.897777478867205,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0.5,
        0,
        0
      ],
      "label": "Moving end portal \u2014 x = 6 \u00d7 0.5 \u00d7 cos \u03b8"
    },
    {
      "id": "lock-front",
      "parent": "end-carriage",
      "position": [
        0,
        0.24,
        0.94
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0,
        0
      ],
      "label": "Separate carriage locking pin"
    },
    {
      "id": "lock-rear",
      "parent": "end-carriage",
      "position": [
        0,
        0.24,
        -0.94
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0,
        0
      ],
      "label": "Separate carriage locking pin"
    },
    {
      "id": "fold-0",
      "parent": null,
      "position": [
        0,
        2.4,
        0
      ],
      "rotation": [
        0,
        0,
        15
      ],
      "explode": [
        0,
        0.0,
        0
      ],
      "label": "Leaf 1: rigid geometry, 500 mm pivot pitch"
    },
    {
      "id": "fold-1",
      "parent": "fold-0",
      "position": [
        0.5,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        -30
      ],
      "explode": [
        0,
        0.12,
        0
      ],
      "label": "Leaf 2: rigid geometry, 500 mm pivot pitch"
    },
    {
      "id": "fold-2",
      "parent": "fold-1",
      "position": [
        0.5,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        30
      ],
      "explode": [
        0,
        0.24,
        0
      ],
      "label": "Leaf 3: rigid geometry, 500 mm pivot pitch"
    },
    {
      "id": "fold-3",
      "parent": "fold-2",
      "position": [
        0.5,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        -30
      ],
      "explode": [
        0,
        0.36,
        0
      ],
      "label": "Leaf 4: rigid geometry, 500 mm pivot pitch"
    },
    {
      "id": "fold-4",
      "parent": "fold-3",
      "position": [
        0.5,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        30
      ],
      "explode": [
        0,
        0.48,
        0
      ],
      "label": "Leaf 5: rigid geometry, 500 mm pivot pitch"
    },
    {
      "id": "fold-5",
      "parent": "fold-4",
      "position": [
        0.5,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        -30
      ],
      "explode": [
        0,
        0.6,
        0
      ],
      "label": "Leaf 6: rigid geometry, 500 mm pivot pitch"
    },
    {
      "id": "rain-assembly-0",
      "parent": null,
      "position": [
        0.0,
        2.29,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0.15,
        0.6
      ],
      "label": "Removable valley drain 1",
      "visibleStages": [
        "rain",
        "shade",
        "service"
      ]
    },
    {
      "id": "rain-assembly-1",
      "parent": null,
      "position": [
        0.9659258262890683,
        2.29,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0.15,
        0.6
      ],
      "label": "Removable valley drain 2",
      "visibleStages": [
        "rain",
        "shade",
        "service"
      ]
    },
    {
      "id": "rain-assembly-2",
      "parent": null,
      "position": [
        1.9318516525781366,
        2.29,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0.15,
        0.6
      ],
      "label": "Removable valley drain 3",
      "visibleStages": [
        "rain",
        "shade",
        "service"
      ]
    },
    {
      "id": "rain-assembly-3",
      "parent": null,
      "position": [
        2.897777478867205,
        2.29,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0.15,
        0.6
      ],
      "label": "Removable valley drain 4",
      "visibleStages": [
        "rain",
        "shade",
        "service"
      ]
    },
    {
      "id": "flap-root",
      "parent": "service-edge",
      "position": [
        -0.38,
        0.72,
        -1.08
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        -0.7,
        0.1,
        -0.4
      ],
      "label": "Compliant pneumatic skin coupon \u2014 segmented bending approximation"
    },
    {
      "id": "flap-0",
      "parent": "flap-root",
      "position": [
        0,
        0.035,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0,
        0
      ],
      "label": "Elastic skin display segment 1; no physical pin"
    },
    {
      "id": "flap-1",
      "parent": "flap-0",
      "position": [
        0,
        0.2,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0,
        0
      ],
      "label": "Elastic skin display segment 2; no physical pin"
    },
    {
      "id": "flap-2",
      "parent": "flap-1",
      "position": [
        0,
        0.2,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        0,
        0,
        0
      ],
      "label": "Elastic skin display segment 3; no physical pin"
    },
    {
      "id": "joinery-coupon",
      "parent": null,
      "position": [
        -1.05,
        0.46,
        0.96
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "explode": [
        -0.35,
        0,
        0.35
      ],
      "label": "CNC repairable keyed-joint coupon"
    }
  ],
  "parts": [
    {
      "id": "spine-foot",
      "component": "spine",
      "group": "service-edge",
      "type": "box",
      "position": [
        0,
        0.08,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.6,
        0.16,
        1.9
      ]
    },
    {
      "id": "spine-front-upright",
      "component": "spine",
      "group": "service-edge",
      "type": "box",
      "position": [
        0,
        1.28,
        0.83
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.1,
        2.4,
        0.1
      ]
    },
    {
      "id": "spine-front-shoe",
      "component": "anchors",
      "group": "service-edge",
      "type": "box",
      "position": [
        0,
        0.17,
        0.83
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#273c3a",
      "material": "metal",
      "size": [
        0.36,
        0.14,
        0.3
      ]
    },
    {
      "id": "spine-front-anchor",
      "component": "anchors",
      "group": "service-edge",
      "type": "cylinder",
      "position": [
        0,
        0.1,
        0.83
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "radius": 0.014,
      "height": 0.2,
      "axis": "y"
    },
    {
      "id": "spine-rear-upright",
      "component": "spine",
      "group": "service-edge",
      "type": "box",
      "position": [
        0,
        1.28,
        -0.83
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.1,
        2.4,
        0.1
      ]
    },
    {
      "id": "spine-rear-shoe",
      "component": "anchors",
      "group": "service-edge",
      "type": "box",
      "position": [
        0,
        0.17,
        -0.83
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#273c3a",
      "material": "metal",
      "size": [
        0.36,
        0.14,
        0.3
      ]
    },
    {
      "id": "spine-rear-anchor",
      "component": "anchors",
      "group": "service-edge",
      "type": "cylinder",
      "position": [
        0,
        0.1,
        -0.83
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "radius": 0.014,
      "height": 0.2,
      "axis": "y"
    },
    {
      "id": "spine-head",
      "component": "spine",
      "group": "service-edge",
      "type": "box",
      "position": [
        0.18,
        2.22,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.46,
        0.09,
        1.72
      ]
    },
    {
      "id": "first-hinge-standoff-0",
      "component": "hinges",
      "group": "service-edge",
      "type": "box",
      "position": [
        0.36,
        2.34,
        -0.83
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.06,
        0.12,
        0.06
      ]
    },
    {
      "id": "first-hinge-standoff-1",
      "component": "hinges",
      "group": "service-edge",
      "type": "box",
      "position": [
        0.36,
        2.34,
        0.83
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.06,
        0.12,
        0.06
      ]
    },
    {
      "id": "service-backplane",
      "component": "spine",
      "group": "service-edge",
      "type": "box",
      "position": [
        -0.18,
        1.18,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#273c3a",
      "material": "polymer",
      "size": [
        0.07,
        1.94,
        1.38
      ]
    },
    {
      "id": "cassette-0-body",
      "component": "dock",
      "group": "cassette-0",
      "type": "box",
      "position": [
        0,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#e8e3d4",
      "material": "polymer",
      "size": [
        0.35,
        0.33,
        1.1
      ],
      "cutaway": true
    },
    {
      "id": "cassette-0-rail--0.46",
      "component": "dock",
      "group": "cassette-0",
      "type": "box",
      "position": [
        -0.04,
        -0.19,
        -0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.4,
        0.025,
        0.035
      ]
    },
    {
      "id": "cassette-0-locating-pin--0.46",
      "component": "dock",
      "group": "cassette-0",
      "type": "cylinder",
      "position": [
        0.18,
        0,
        -0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "radius": 0.012,
      "height": 0.05,
      "axis": "x"
    },
    {
      "id": "cassette-0-rail-0.46",
      "component": "dock",
      "group": "cassette-0",
      "type": "box",
      "position": [
        -0.04,
        -0.19,
        0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.4,
        0.025,
        0.035
      ]
    },
    {
      "id": "cassette-0-locating-pin-0.46",
      "component": "dock",
      "group": "cassette-0",
      "type": "cylinder",
      "position": [
        0.18,
        0,
        0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "radius": 0.012,
      "height": 0.05,
      "axis": "x"
    },
    {
      "id": "cassette-0-retention-bar",
      "component": "dock",
      "group": "cassette-0",
      "type": "box",
      "position": [
        0.205,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "size": [
        0.025,
        0.035,
        0.8
      ]
    },
    {
      "id": "cassette-1-body",
      "component": "dock",
      "group": "cassette-1",
      "type": "box",
      "position": [
        0,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#e8e3d4",
      "material": "polymer",
      "size": [
        0.35,
        0.33,
        1.1
      ],
      "cutaway": true
    },
    {
      "id": "cassette-1-rail--0.46",
      "component": "dock",
      "group": "cassette-1",
      "type": "box",
      "position": [
        -0.04,
        -0.19,
        -0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.4,
        0.025,
        0.035
      ]
    },
    {
      "id": "cassette-1-locating-pin--0.46",
      "component": "dock",
      "group": "cassette-1",
      "type": "cylinder",
      "position": [
        0.18,
        0,
        -0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "radius": 0.012,
      "height": 0.05,
      "axis": "x"
    },
    {
      "id": "cassette-1-rail-0.46",
      "component": "dock",
      "group": "cassette-1",
      "type": "box",
      "position": [
        -0.04,
        -0.19,
        0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.4,
        0.025,
        0.035
      ]
    },
    {
      "id": "cassette-1-locating-pin-0.46",
      "component": "dock",
      "group": "cassette-1",
      "type": "cylinder",
      "position": [
        0.18,
        0,
        0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "radius": 0.012,
      "height": 0.05,
      "axis": "x"
    },
    {
      "id": "cassette-1-retention-bar",
      "component": "dock",
      "group": "cassette-1",
      "type": "box",
      "position": [
        0.205,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "size": [
        0.025,
        0.035,
        0.8
      ]
    },
    {
      "id": "cassette-2-body",
      "component": "dock",
      "group": "cassette-2",
      "type": "box",
      "position": [
        0,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#e8e3d4",
      "material": "polymer",
      "size": [
        0.35,
        0.33,
        1.1
      ],
      "cutaway": true
    },
    {
      "id": "cassette-2-rail--0.46",
      "component": "dock",
      "group": "cassette-2",
      "type": "box",
      "position": [
        -0.04,
        -0.19,
        -0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.4,
        0.025,
        0.035
      ]
    },
    {
      "id": "cassette-2-locating-pin--0.46",
      "component": "dock",
      "group": "cassette-2",
      "type": "cylinder",
      "position": [
        0.18,
        0,
        -0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "radius": 0.012,
      "height": 0.05,
      "axis": "x"
    },
    {
      "id": "cassette-2-rail-0.46",
      "component": "dock",
      "group": "cassette-2",
      "type": "box",
      "position": [
        -0.04,
        -0.19,
        0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#a6b2ad",
      "material": "metal",
      "size": [
        0.4,
        0.025,
        0.035
      ]
    },
    {
      "id": "cassette-2-locating-pin-0.46",
      "component": "dock",
      "group": "cassette-2",
      "type": "cylinder",
      "position": [
        0.18,
        0,
        0.46
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "radius": 0.012,
      "height": 0.05,
      "axis": "x"
    },
    {
      "id": "cassette-2-retention-bar",
      "component": "dock",
      "group": "cassette-2",
      "type": "box",
      "position": [
        0.205,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "size": [
        0.025,
        0.035,
        0.8
      ]
    },
    {
      "id": "buffer-reservoir",
      "component": "rain",
      "group": "cassette-0",
      "type": "box",
      "position": [
        0,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#668b9c",
      "material": "water",
      "size": [
        0.27,
        0.23,
        0.5
      ]
    },
    {
      "id": "first-flush-bowl",
      "component": "rain",
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      ],
      "color": "#668b9c",
      "material": "metal",
      "to": [
        0.037,
        0.035,
        0.79
      ],
      "width": 0.008,
      "depth": 0.065,
      "from": [
        0.037,
        0.065,
        -0.79
      ]
    },
    {
      "id": "gutter-3-drain-hose",
      "component": "rain",
      "group": "rain-assembly-3",
      "type": "pipe",
      "position": [
        0,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#668b9c",
      "material": "polymer",
      "path": [
        [
          0,
          0,
          0.79
        ],
        [
          0.12,
          -0.25,
          0.94
        ],
        [
          0.12,
          -1.9,
          0.94
        ],
        [
          0.12,
          -2.05,
          0.94
        ]
      ],
      "radius": 0.014
    },
    {
      "id": "gutter-3-hose-union",
      "component": "rain",
      "group": "rain-assembly-3",
      "type": "cylinder",
      "position": [
        0,
        -0.03,
        0.79
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "radius": 0.022,
      "height": 0.06,
      "axis": "y"
    },
    {
      "id": "ground-rain-manifold",
      "component": "rain",
      "group": null,
      "type": "pipe",
      "position": [
        0,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#668b9c",
      "material": "metal",
      "path": [
        [
          0.12,
          0.24,
          0.94
        ],
        [
          3.02,
          0.24,
          0.94
        ]
      ],
      "radius": 0.02,
      "visibleStages": [
        "rain",
        "shade",
        "service"
      ]
    },
    {
      "id": "manifold-to-firstflush",
      "component": "rain",
      "group": null,
      "type": "pipe",
      "position": [
        0,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#668b9c",
      "material": "metal",
      "path": [
        [
          0.12,
          0.24,
          0.94
        ],
        [
          -0.34,
          0.24,
          0.94
        ],
        [
          -0.34,
          0.52,
          0.39
        ]
      ],
      "radius": 0.015,
      "visibleStages": [
        "rain",
        "shade",
        "service"
      ]
    },
    {
      "id": "flap-clamp",
      "component": "skin",
      "group": "flap-root",
      "type": "box",
      "position": [
        0,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#273c3a",
      "material": "metal",
      "size": [
        0.46,
        0.075,
        0.09
      ]
    },
    {
      "id": "flap-0-stiff-laminate",
      "component": "skin",
      "group": "flap-0",
      "type": "box",
      "position": [
        0,
        0.1,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#e8e3d4",
      "material": "polymer",
      "size": [
        0.44,
        0.2,
        0.004
      ]
    },
    {
      "id": "flap-0-compliant-laminate",
      "component": "skin",
      "group": "flap-0",
      "type": "box",
      "position": [
        0,
        0.1,
        0.007
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#7a9685",
      "material": "polymer",
      "size": [
        0.44,
        0.2,
        0.002
      ]
    },
    {
      "id": "flap-0-air-cushion",
      "component": "pneumatic",
      "group": "flap-0",
      "type": "box",
      "position": [
        0,
        0.1,
        0.003
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#668b9c",
      "material": "polymer",
      "size": [
        0.33,
        0.17,
        0.002
      ]
    },
    {
      "id": "flap-0-pv-island",
      "component": "skin",
      "group": "flap-0",
      "type": "box",
      "position": [
        0,
        0.1,
        -0.0035
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#294a50",
      "material": "glass",
      "size": [
        0.28,
        0.14,
        0.002
      ]
    },
    {
      "id": "flap-0-soft-edge",
      "component": "skin",
      "group": "flap-0",
      "type": "box",
      "position": [
        0.21,
        0.1,
        0.003
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#454e4b",
      "material": "polymer",
      "size": [
        0.018,
        0.2,
        0.01
      ]
    },
    {
      "id": "flap-1-stiff-laminate",
      "component": "skin",
      "group": "flap-1",
      "type": "box",
      "position": [
        0,
        0.1,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#e8e3d4",
      "material": "polymer",
      "size": [
        0.44,
        0.2,
        0.004
      ]
    },
    {
      "id": "flap-1-compliant-laminate",
      "component": "skin",
      "group": "flap-1",
      "type": "box",
      "position": [
        0,
        0.1,
        0.007
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#7a9685",
      "material": "polymer",
      "size": [
        0.44,
        0.2,
        0.002
      ]
    },
    {
      "id": "flap-1-air-cushion",
      "component": "pneumatic",
      "group": "flap-1",
      "type": "box",
      "position": [
        0,
        0.1,
        0.003
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#668b9c",
      "material": "polymer",
      "size": [
        0.33,
        0.17,
        0.002
      ]
    },
    {
      "id": "flap-1-pv-island",
      "component": "skin",
      "group": "flap-1",
      "type": "box",
      "position": [
        0,
        0.1,
        -0.0035
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#294a50",
      "material": "glass",
      "size": [
        0.28,
        0.14,
        0.002
      ]
    },
    {
      "id": "flap-1-soft-edge",
      "component": "skin",
      "group": "flap-1",
      "type": "box",
      "position": [
        0.21,
        0.1,
        0.003
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#454e4b",
      "material": "polymer",
      "size": [
        0.018,
        0.2,
        0.01
      ]
    },
    {
      "id": "flap-2-stiff-laminate",
      "component": "skin",
      "group": "flap-2",
      "type": "box",
      "position": [
        0,
        0.1,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#e8e3d4",
      "material": "polymer",
      "size": [
        0.44,
        0.2,
        0.004
      ]
    },
    {
      "id": "flap-2-compliant-laminate",
      "component": "skin",
      "group": "flap-2",
      "type": "box",
      "position": [
        0,
        0.1,
        0.007
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#7a9685",
      "material": "polymer",
      "size": [
        0.44,
        0.2,
        0.002
      ]
    },
    {
      "id": "flap-2-air-cushion",
      "component": "pneumatic",
      "group": "flap-2",
      "type": "box",
      "position": [
        0,
        0.1,
        0.003
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#668b9c",
      "material": "polymer",
      "size": [
        0.33,
        0.17,
        0.002
      ]
    },
    {
      "id": "flap-2-pv-island",
      "component": "skin",
      "group": "flap-2",
      "type": "box",
      "position": [
        0,
        0.1,
        -0.0035
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#294a50",
      "material": "glass",
      "size": [
        0.28,
        0.14,
        0.002
      ]
    },
    {
      "id": "flap-2-soft-edge",
      "component": "skin",
      "group": "flap-2",
      "type": "box",
      "position": [
        0.21,
        0.1,
        0.003
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#454e4b",
      "material": "polymer",
      "size": [
        0.018,
        0.2,
        0.01
      ]
    },
    {
      "id": "coupon-air-pump",
      "component": "pneumatic",
      "group": "service-edge",
      "type": "box",
      "position": [
        -0.22,
        0.37,
        -1.1
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#273c3a",
      "material": "metal",
      "size": [
        0.23,
        0.16,
        0.19
      ]
    },
    {
      "id": "coupon-relief-valve",
      "component": "pneumatic",
      "group": "service-edge",
      "type": "cylinder",
      "position": [
        -0.22,
        0.5,
        -1.1
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "radius": 0.025,
      "height": 0.1,
      "axis": "y"
    },
    {
      "id": "coupon-pressure-sensor",
      "component": "control",
      "group": "service-edge",
      "type": "cylinder",
      "position": [
        -0.12,
        0.5,
        -1.1
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#7a9685",
      "material": "metal",
      "radius": 0.035,
      "height": 0.055,
      "axis": "x"
    },
    {
      "id": "coupon-air-supply",
      "component": "pneumatic",
      "group": "service-edge",
      "type": "pipe",
      "position": [
        0,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#668b9c",
      "material": "polymer",
      "path": [
        [
          -0.22,
          0.46,
          -1.1
        ],
        [
          -0.38,
          0.53,
          -1.1
        ],
        [
          -0.38,
          0.72,
          -1.08
        ]
      ],
      "radius": 0.008
    },
    {
      "id": "joint-cheek-0",
      "component": "dock",
      "group": "joinery-coupon",
      "type": "box",
      "position": [
        0,
        0,
        -0.13
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#b9a889",
      "material": "polymer",
      "size": [
        0.34,
        0.24,
        0.08
      ]
    },
    {
      "id": "joint-cheek-1",
      "component": "dock",
      "group": "joinery-coupon",
      "type": "box",
      "position": [
        0,
        0,
        0.13
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#b9a889",
      "material": "polymer",
      "size": [
        0.34,
        0.24,
        0.08
      ]
    },
    {
      "id": "joint-central-tongue",
      "component": "dock",
      "group": "joinery-coupon",
      "type": "box",
      "position": [
        0.09,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#e8e3d4",
      "material": "polymer",
      "size": [
        0.3,
        0.13,
        0.15
      ]
    },
    {
      "id": "joint-retention-pin",
      "component": "dock",
      "group": "joinery-coupon",
      "type": "cylinder",
      "position": [
        0.12,
        0,
        0
      ],
      "rotation": [
        0,
        0,
        0
      ],
      "color": "#d1a45d",
      "material": "metal",
      "radius": 0.013,
      "height": 0.38,
      "axis": "z"
    }
  ],
  "flows": [
    {
      "id": "rain-route",
      "label": "Collection after lock: gutter \u2192 hose \u2192 first flush \u2192 buffer",
      "kind": "liquid",
      "color": "#68a5b6",
      "path": [
        [
          0.966,
          2.29,
          0.79
        ],
        [
          1.086,
          2.04,
          0.94
        ],
        [
          1.086,
          0.24,
          0.94
        ],
        [
          0.12,
          0.24,
          0.94
        ],
        [
          -0.34,
          0.24,
          0.94
        ],
        [
          -0.34,
          0.52,
          0.39
        ],
        [
          -0.34,
          0.52,
          0
        ]
      ],
      "stages": [
        "rain",
        "shade"
      ],
      "component": "rain",
      "closed": false
    },
    {
      "id": "pv-service",
      "label": "Dry DC: roof harness \u2192 fixed isolation; cable loops not fully modeled",
      "kind": "power",
      "color": "#d7b269",
      "path": [
        [
          0.24,
          2.47,
          0.68
        ],
        [
          0.02,
          2.4,
          0.86
        ],
        [
          -0.36,
          2.15,
          0.86
        ],
        [
          -0.36,
          0.96,
          -0.2
        ]
      ],
      "stages": [
        "shade"
      ],
      "component": "electric",
      "closed": false
    },
    {
      "id": "air-coupon",
      "label": "Regulated air \u2192 laminate cushion",
      "kind": "air",
      "color": "#8eaebe",
      "path": [
        [
          -0.58,
          0.46,
          -1.1
        ],
        [
          -0.74,
          0.53,
          -1.1
        ],
        [
          -0.74,
          0.72,
          -1.08
        ],
        [
          -0.74,
          0.9,
          -1.077
        ]
      ],
      "stages": [
        "shade"
      ],
      "component": "pneumatic",
      "closed": false
    }
  ],
  "stages": [
    {
      "id": "packed",
      "title": "01 \u00b7 Packed / isolated",
      "duration": 4,
      "explanation": "Six rigid leaves nest without changing shape; rain hoses are removed and PV harness isolated. The service spine remains accessible.",
      "activeComponents": [
        "leaves",
        "hinges",
        "dock"
      ],
      "poses": {
        "fold-0": {
          "rotation": [
            0,
            0,
            70
          ]
        },
        "fold-1": {
          "rotation": [
            0,
            0,
            -140
          ]
        },
        "fold-2": {
          "rotation": [
            0,
            0,
            140
          ]
        },
        "fold-3": {
          "rotation": [
            0,
            0,
            -140
          ]
        },
        "fold-4": {
          "rotation": [
            0,
            0,
            140
          ]
        },
        "fold-5": {
          "rotation": [
            0,
            0,
            -140
          ]
        },
        "end-carriage": {
          "position": [
            1.0260604299770064,
            0,
            0
          ]
        },
        "lock-front": {
          "position": [
            0,
            0.37,
            0.94
          ]
        },
        "lock-rear": {
          "position": [
            0,
            0.37,
            -0.94
          ]
        },
        "flap-0": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-1": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-2": {
          "rotation": [
            0,
            0,
            0
          ]
        }
      },
      "observable": "Measure 1.026 m hinge-line span; no rain plumbing spans moving joints.",
      "inputs": "Brake on; perimeter clear; no standing water.",
      "outputs": "Ready-to-inspect packed kit.",
      "failure": "A retained hose, damaged hinge or trapped person prevents release."
    },
    {
      "id": "unlock",
      "title": "02 \u00b7 Release transport restraint",
      "duration": 3,
      "explanation": "A human clears the protected motion envelope, confirms both rails and connects the drive. Operational locks remain retracted; transport strap is a required real-build item not modeled.",
      "activeComponents": [
        "control",
        "drive",
        "guide"
      ],
      "poses": {
        "fold-0": {
          "rotation": [
            0,
            0,
            70
          ]
        },
        "fold-1": {
          "rotation": [
            0,
            0,
            -140
          ]
        },
        "fold-2": {
          "rotation": [
            0,
            0,
            140
          ]
        },
        "fold-3": {
          "rotation": [
            0,
            0,
            -140
          ]
        },
        "fold-4": {
          "rotation": [
            0,
            0,
            140
          ]
        },
        "fold-5": {
          "rotation": [
            0,
            0,
            -140
          ]
        },
        "end-carriage": {
          "position": [
            1.0260604299770064,
            0,
            0
          ]
        },
        "lock-front": {
          "position": [
            0,
            0.37,
            0.94
          ]
        },
        "lock-rear": {
          "position": [
            0,
            0.37,
            -0.94
          ]
        },
        "flap-0": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-1": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-2": {
          "rotation": [
            0,
            0,
            0
          ]
        }
      },
      "observable": "Manual reset precedes motor enable.",
      "inputs": "E-stop healthy; wind below experimentally selected limit.",
      "outputs": "Motion permission only, not automatic deployment.",
      "failure": "Any contradictory state inhibits drive."
    },
    {
      "id": "expand",
      "title": "03 \u00b7 Guided expansion",
      "duration": 8,
      "explanation": "The motor brakes the gravity-assisted opening. Six \u00b140\u00b0 leaves preserve all pivot distances while the portal moves to x=2.298 m.",
      "activeComponents": [
        "drive",
        "guide",
        "hinges",
        "sync"
      ],
      "poses": {
        "fold-0": {
          "rotation": [
            0,
            0,
            40
          ]
        },
        "fold-1": {
          "rotation": [
            0,
            0,
            -80
          ]
        },
        "fold-2": {
          "rotation": [
            0,
            0,
            80
          ]
        },
        "fold-3": {
          "rotation": [
            0,
            0,
            -80
          ]
        },
        "fold-4": {
          "rotation": [
            0,
            0,
            80
          ]
        },
        "fold-5": {
          "rotation": [
            0,
            0,
            -80
          ]
        },
        "end-carriage": {
          "position": [
            2.298133329356934,
            0,
            0
          ]
        },
        "lock-front": {
          "position": [
            0,
            0.37,
            0.94
          ]
        },
        "lock-rear": {
          "position": [
            0,
            0.37,
            -0.94
          ]
        },
        "flap-0": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-1": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-2": {
          "rotation": [
            0,
            0,
            0
          ]
        }
      },
      "observable": "Same rigid vertices and real pivots, not a shape morph.",
      "inputs": "Force-limited paired drive; exclusion zone.",
      "outputs": "Increased useful footprint.",
      "failure": "A blocked wheel or synchronization error stops both sides."
    },
    {
      "id": "deployed",
      "title": "04 \u00b7 Stop before flat",
      "duration": 5,
      "explanation": "Expansion stops at \u00b115\u00b0, avoiding the flat kinematic singularity. A 2.898 m span gives a 4.35 m\u00b2 projected footprint.",
      "activeComponents": [
        "leaves",
        "guide",
        "control"
      ],
      "poses": {
        "fold-0": {
          "rotation": [
            0,
            0,
            15
          ]
        },
        "fold-1": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "fold-2": {
          "rotation": [
            0,
            0,
            30
          ]
        },
        "fold-3": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "fold-4": {
          "rotation": [
            0,
            0,
            30
          ]
        },
        "fold-5": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "end-carriage": {
          "position": [
            2.897777478867205,
            0,
            0
          ]
        },
        "lock-front": {
          "position": [
            0,
            0.37,
            0.94
          ]
        },
        "lock-rear": {
          "position": [
            0,
            0.37,
            -0.94
          ]
        },
        "flap-0": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-1": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-2": {
          "rotation": [
            0,
            0,
            0
          ]
        }
      },
      "observable": "Encoder and both deployed end switches agree.",
      "inputs": "No attached drains; dry roof.",
      "outputs": "Mechanical end position.",
      "failure": "End-stop mismatch keeps static locks unconfirmed."
    },
    {
      "id": "lock",
      "title": "05 \u00b7 Positive lock / brake hold",
      "duration": 3,
      "explanation": "Separate pins engage both end receivers before use. The drive is not a wind lock. Foundation and roof load qualification remain separate.",
      "activeComponents": [
        "locks",
        "anchors",
        "control"
      ],
      "poses": {
        "fold-0": {
          "rotation": [
            0,
            0,
            15
          ]
        },
        "fold-1": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "fold-2": {
          "rotation": [
            0,
            0,
            30
          ]
        },
        "fold-3": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "fold-4": {
          "rotation": [
            0,
            0,
            30
          ]
        },
        "fold-5": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "end-carriage": {
          "position": [
            2.897777478867205,
            0,
            0
          ]
        },
        "lock-front": {
          "position": [
            0,
            0.24,
            0.94
          ]
        },
        "lock-rear": {
          "position": [
            0,
            0.24,
            -0.94
          ]
        },
        "flap-0": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-1": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-2": {
          "rotation": [
            0,
            0,
            0
          ]
        }
      },
      "observable": "Visible pins seat; independent witnesses confirm engagement.",
      "inputs": "Deployed stops; zero speed.",
      "outputs": "Mechanically held canopy awaiting qualified load use.",
      "failure": "Pin engagement without structural receiver proof is not a load rating."
    },
    {
      "id": "rain",
      "title": "06 \u00b7 Attach removable rain circuit",
      "duration": 5,
      "explanation": "Only now install four valley drains and ground hoses. Sloped gutters collect each low fold into first flush and a nonpotable buffer; treatment is downstream.",
      "activeComponents": [
        "rain",
        "dock"
      ],
      "poses": {
        "fold-0": {
          "rotation": [
            0,
            0,
            15
          ]
        },
        "fold-1": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "fold-2": {
          "rotation": [
            0,
            0,
            30
          ]
        },
        "fold-3": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "fold-4": {
          "rotation": [
            0,
            0,
            30
          ]
        },
        "fold-5": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "end-carriage": {
          "position": [
            2.897777478867205,
            0,
            0
          ]
        },
        "lock-front": {
          "position": [
            0,
            0.24,
            0.94
          ]
        },
        "lock-rear": {
          "position": [
            0,
            0.24,
            -0.94
          ]
        },
        "flap-0": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-1": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-2": {
          "rotation": [
            0,
            0,
            0
          ]
        }
      },
      "observable": "Blue hoses appear only after motion is inhibited; geometric drainage has a continuous visible route.",
      "inputs": "Verified locks; manual hose coupling; clean first-flush path.",
      "outputs": "Collected rainwater, overflow and debris.",
      "failure": "A blocked gutter ponds water; a connected drain blocks folding."
    },
    {
      "id": "shade",
      "title": "07 \u00b7 Breathe / harvest energy",
      "duration": 6,
      "explanation": "The main roof stays locked while a separate compliant PV skin bends. The segmented skin is a visual approximation of elastic curvature, not a validated strain or pneumatic simulation.",
      "activeComponents": [
        "skin",
        "pneumatic",
        "electric",
        "control"
      ],
      "poses": {
        "fold-0": {
          "rotation": [
            0,
            0,
            15
          ]
        },
        "fold-1": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "fold-2": {
          "rotation": [
            0,
            0,
            30
          ]
        },
        "fold-3": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "fold-4": {
          "rotation": [
            0,
            0,
            30
          ]
        },
        "fold-5": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "end-carriage": {
          "position": [
            2.897777478867205,
            0,
            0
          ]
        },
        "lock-front": {
          "position": [
            0,
            0.24,
            0.94
          ]
        },
        "lock-rear": {
          "position": [
            0,
            0.24,
            -0.94
          ]
        },
        "flap-0": {
          "rotation": [
            0,
            0,
            -18
          ]
        },
        "flap-1": {
          "rotation": [
            0,
            0,
            -18
          ]
        },
        "flap-2": {
          "rotation": [
            0,
            0,
            -18
          ]
        }
      },
      "observable": "Three small display segments curl while all six rigid roof leaves remain unchanged.",
      "inputs": "Regulated air; DC isolation complete; measured local pressure limit.",
      "outputs": "Variable shade/vent opening and possible PV production.",
      "failure": "A leak must vent to a tested safe state; PV and laminate fatigue are unresolved."
    },
    {
      "id": "service",
      "title": "08 \u00b7 Isolate / replace cassette",
      "duration": 5,
      "explanation": "Air vents and DC is isolated. A keyed cassette can slide out after releasing a separate retainer. Wet and dry disconnections are distinct.",
      "activeComponents": [
        "dock",
        "spine",
        "electric",
        "pneumatic"
      ],
      "poses": {
        "fold-0": {
          "rotation": [
            0,
            0,
            15
          ]
        },
        "fold-1": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "fold-2": {
          "rotation": [
            0,
            0,
            30
          ]
        },
        "fold-3": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "fold-4": {
          "rotation": [
            0,
            0,
            30
          ]
        },
        "fold-5": {
          "rotation": [
            0,
            0,
            -30
          ]
        },
        "end-carriage": {
          "position": [
            2.897777478867205,
            0,
            0
          ]
        },
        "lock-front": {
          "position": [
            0,
            0.24,
            0.94
          ]
        },
        "lock-rear": {
          "position": [
            0,
            0.24,
            -0.94
          ]
        },
        "flap-0": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-1": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-2": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "cassette-2": {
          "position": [
            0.35,
            1.4,
            0
          ]
        }
      },
      "observable": "One service cartridge translates while the supported roof remains locked.",
      "inputs": "Lockout; depressurize; drain affected wet circuit.",
      "outputs": "Repair without discarding a whole structure.",
      "failure": "Sliding geometry is not a structural lock: retainer must be reinstated."
    },
    {
      "id": "repack",
      "title": "09 \u00b7 Remove drains / repack",
      "duration": 8,
      "explanation": "Remove and drain all temporary hoses, isolate roof PV, clear the perimeter, unload locking pins with the drive, retract them and close under a torque limit.",
      "activeComponents": [
        "rain",
        "drive",
        "hinges",
        "control"
      ],
      "poses": {
        "fold-0": {
          "rotation": [
            0,
            0,
            70
          ]
        },
        "fold-1": {
          "rotation": [
            0,
            0,
            -140
          ]
        },
        "fold-2": {
          "rotation": [
            0,
            0,
            140
          ]
        },
        "fold-3": {
          "rotation": [
            0,
            0,
            -140
          ]
        },
        "fold-4": {
          "rotation": [
            0,
            0,
            140
          ]
        },
        "fold-5": {
          "rotation": [
            0,
            0,
            -140
          ]
        },
        "end-carriage": {
          "position": [
            1.0260604299770064,
            0,
            0
          ]
        },
        "lock-front": {
          "position": [
            0,
            0.37,
            0.94
          ]
        },
        "lock-rear": {
          "position": [
            0,
            0.37,
            -0.94
          ]
        },
        "flap-0": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-1": {
          "rotation": [
            0,
            0,
            0
          ]
        },
        "flap-2": {
          "rotation": [
            0,
            0,
            0
          ]
        }
      },
      "observable": "Return to exactly the same 1.026 m span; no panel resize.",
      "inputs": "All drains disconnected; no wind or snow operation approval.",
      "outputs": "Service spine and compact reusable canopy.",
      "failure": "Do not fold if any water, cable loop, debris or person remains in the crease envelope."
    }
  ],
  "components": [
    {
      "id": "spine",
      "name": "Stable service vertebra",
      "role": "Fix water, electrical isolation and control on a non-folding edge.",
      "principle": "Moving geometry wraps useful infrastructure instead of asking every fold to carry plumbing.",
      "materials": "Aluminium profiles; replaceable polymer service backplane.",
      "interfaces": "600 mm proposed cassette family; fixed wet ports segregated from dry DC.",
      "failure": "Racking or poorly transferred ground loads.",
      "test": "Measure sway and anchor forces before adding roof payload.",
      "evidence": [
        "O08",
        "O15"
      ],
      "status": "Proposed integration"
    },
    {
      "id": "leaves",
      "name": "Identical 12 mm rigid leaf cassettes",
      "role": "One manufactured leaf repeats across a reconfigurable shade/solar layer.",
      "principle": "Six hinge pitches remain 500 mm; solids trim 25 mm from each pivot to clear finite thickness.",
      "materials": "Proposed aluminium skins / lightweight core; removable edge caps.",
      "interfaces": "500 mm pitch, 1500 mm width; 450 mm solid span; no pressure boundary.",
      "failure": "Face delamination, edge impact, panel corners colliding near packed state.",
      "test": "Full-angle interference coupon and measured leaf mass; inspect core bond.",
      "evidence": [
        "O01",
        "O02"
      ],
      "status": "Proposed integration"
    },
    {
      "id": "hinges",
      "name": "Actual pin axes and finite-thickness clearance",
      "role": "Expose where motion occurs and where solid panels stop.",
      "principle": "Nested local rotations produce alternating absolute \u00b1\u03b8 leaf angles; circular barrels share real pivots.",
      "materials": "8 mm-radius illustrative stainless axle; polymer bushings; isolated metals.",
      "interfaces": "Removable pins and keyed tabs; flexible crease bridge is an additional weather-development item.",
      "failure": "Bushing wear, grit seizure, mounting tabs colliding, trapped fingers.",
      "test": "Torque-angle and dust-contaminated cycle tests; pin-retention inspection.",
      "evidence": [
        "O01",
        "O06"
      ],
      "status": "Proposed integration"
    },
    {
      "id": "guide",
      "name": "Synchronized ground-guided end portal",
      "role": "Keep the free edge level while constrained leaf angles change.",
      "principle": "Carriage x=3cos\u03b8; paired rails restrict yaw. Four proposed equal-pulley belts enforce alternating hinge angles; end height closes a one-DoF branch. Shaft keying and real belt behavior remain unbuilt.",
      "materials": "Aluminium portal, polymer guide wheels, debris covers.",
      "interfaces": "Paired belt clamps and final hinge support; rail anchors need site design.",
      "failure": "Skew, derailment, belt mismatch or a blocked rail.",
      "test": "Jam one rail with a force-limited manual rig and demonstrate safe stop.",
      "evidence": [
        "O07"
      ],
      "status": "Proposed integration"
    },
    {
      "id": "sync",
      "name": "Four hinge-angle timing transmissions",
      "role": "Constrain all relative hinge angles instead of commanding six unrelated motors.",
      "principle": "On intermediate leaf i, an open equal-pulley belt connects shafts keyed to its two neighbors: root relative rotation = \u2212\u03b2_i, tip = \u03b2_(i+1), so \u03b2_(i+1)=\u2212\u03b2_i. Fixed end height selects \u03b10=\u2212\u03b21/2.",
      "materials": "Proposed timing belts, equal metal pulleys, keyed cross-hinge shafts and bearings.",
      "interfaces": "Adjacent belts alternate axial planes; key/bearing stack and tensioner require detailed CAD.",
      "failure": "Tooth jump, backlash, wrong keying, unequal tension or out-of-plane interference.",
      "test": "Backdrive one hinge and measure every other angle; require <1\u00b0 tracking error over full travel before motorization.",
      "evidence": [
        "O01",
        "O06"
      ],
      "status": "Proposed integration"
    },
    {
      "id": "drive",
      "name": "Drive, brake and manual recovery",
      "role": "Move slowly, hold safely, recover without mains power.",
      "principle": "Fixed geared DC motor drives paired belts through a common shaft; separate spring brake; manual handwheel.",
      "materials": "Commercial component classes; exact suppliers and ratings unselected.",
      "interfaces": "Proposed 24 V / 100 W class; 250 N nominal bench target, not wind restraint.",
      "failure": "Backdrive, runaway, pinch or overcurrent on blockage.",
      "test": "Load-cell force curve and power-loss brake test at every angle.",
      "evidence": [
        "O06",
        "O07"
      ],
      "status": "Commercial class"
    },
    {
      "id": "locks",
      "name": "Independent visible end locks",
      "role": "Remove the deployment motor from the static load path.",
      "principle": "Two positive carriage pins engage fixed receivers only at the deployed stop; independent state witnesses.",
      "materials": "Metal pins and brackets; corrosion / wear allowance unresolved.",
      "interfaces": "Structural receiver and anchor design not established by this visual pin diameter.",
      "failure": "False lock indication, hole misalignment, pin shear or release under load.",
      "test": "Load-test full receiver / pin / rail / anchor chain; two-channel proof of engagement.",
      "evidence": [
        "O03",
        "O13"
      ],
      "status": "Proposed integration"
    },
    {
      "id": "anchors",
      "name": "Ground interface and separate structural burden",
      "role": "Prevent a lightweight moving roof becoming a wind sail.",
      "principle": "Rail feet and anchors transfer overturning, uplift and horizontal reactions to a designed foundation.",
      "materials": "Site-specific ballast, screws or footings to be engineered.",
      "interfaces": "No universal anchor and no wind/snow rating is claimed.",
      "failure": "Uplift, soft-soil pullout, sliding or overturning.",
      "test": "Site pullout and lateral tests; structural analysis of gust and asymmetric pressure.",
      "evidence": [
        "O07",
        "O10"
      ],
      "status": "Proposed integration"
    },
    {
      "id": "electric",
      "name": "Rigid PV islands and strain-relieved dry harness",
      "role": "Harvest energy without bending cells across creases.",
      "principle": "Tiles stay on rigid leaves; detachable service loops cross hinges with specified bend radius. Wiring loops are not fully modeled.",
      "materials": "Replaceable PV laminates; UV cable; individual isolation and bypass strategy.",
      "interfaces": "24 V architecture is proposed; no PV yield or electrical certification claimed.",
      "failure": "Hot spots, partial shading mismatch, flex fatigue and wet connectors.",
      "test": "Shade/temperature mapping, insulation tests, measured loop curvature throughout motion.",
      "evidence": [
        "O11",
        "O12"
      ],
      "status": "Proposed integration"
    },
    {
      "id": "rain",
      "name": "Removable valley drains / nonpotable buffer",
      "role": "Collect each real accordion valley after locking.",
      "principle": "Four gutters slope across width to hoses and a ground manifold; all hoses removed before fold.",
      "materials": "Metal gutters, UV-rated hoses, coarse screen and first-flush vessel.",
      "interfaces": "Rain bypasses desert sorbent reactor and enters a separately assessed treatment train; not potable by default.",
      "failure": "Ponding, dirty first flush, kinked hose, trapped water before freezing.",
      "test": "Meter rain-rig inlet / stored / overflow volumes, hose disconnect interlock.",
      "evidence": [
        "O08"
      ],
      "status": "Proposed integration"
    },
    {
      "id": "dock",
      "name": "Repairable keyed service cassettes",
      "role": "Combine Japanese joinery logic with repeatable replaceable interfaces.",
      "principle": "Geometry locates; a separate retained pin or rated latch secures. Dry mechanical, wet and electrical interfaces remain separate.",
      "materials": "CNC timber coupon for indoor learning; durable metal/polymer service production interface.",
      "interfaces": "600 mm catalogue pitch is a proposal, not a universal standard or permission to copy Tsugite software.",
      "failure": "Grain splitting, swelling, backlash, accidental slide-out or wet/dry misconnection.",
      "test": "Assembly-force and play measurements over wet/dry cycles; wrong-way mate must fail.",
      "evidence": [
        "O08",
        "O09",
        "O13"
      ],
      "status": "Proposed integration"
    },
    {
      "id": "skin",
      "name": "Breathing PV / ventilation skin coupon",
      "role": "Change local shade and ventilation without deploying the whole roof.",
      "principle": "Asymmetric compliant laminate bends with an internal air cushion; 3 rendered segments approximate curvature, not physical hinges.",
      "materials": "FRP / elastomer or thermoplastic composite candidates; segmented PV islands.",
      "interfaces": "FlectoLine demonstrates the class outdoors; this 440 \u00d7 600 mm coupon has not been built.",
      "failure": "Fatigue, delamination, PV cracking or loss of pressure changing safe position.",
      "test": "Pressure-angle-hysteresis and 10000-cycle screening behind a protective enclosure.",
      "evidence": [
        "O11",
        "O12"
      ],
      "status": "Demonstrated research"
    },
    {
      "id": "pneumatic",
      "name": "Low-pressure actuation circuit",
      "role": "Supply the breathing skin with independently limited pressure.",
      "principle": "Pump \u2192 regulator / relief \u2192 solenoid manifold \u2192 cushion; vent releases stored elastic energy.",
      "materials": "Commercial small pump, tubing, relief valve; custom laminate bladder.",
      "interfaces": "No pressure number from FlectoLine transfers automatically to our laminate.",
      "failure": "Burst, slow leak, valve stuck on, compressor draw exceeding PV supply.",
      "test": "Leak-down, relief verification and guarded pressure-step test with strain observation.",
      "evidence": [
        "O11"
      ],
      "status": "Proposed integration"
    },
    {
      "id": "control",
      "name": "State witnesses and human-safe sequencing",
      "role": "Act on measured locks, motion and environmental state.",
      "principle": "Encoder plus two end stops, brake state, drain disconnect, motor current and wind stop; no AI required for first prototype.",
      "materials": "Commercial sensor classes; independent emergency stop.",
      "interfaces": "Protective perimeter and manual reset; rendered cups are an illustrative weather sensor.",
      "failure": "False negative obstacle, contradictory sensors or automatic restart.",
      "test": "Fault injection with every sensor unplugged and independent E-stop verified.",
      "evidence": [
        "O06",
        "O07"
      ],
      "status": "Proposed integration"
    }
  ],
  "mechanism": {
    "type": "accordion",
    "leaves": 6,
    "pitch": 0.5,
    "minDeg": 15,
    "maxDeg": 70,
    "firstGroup": "fold-0",
    "followingGroups": [
      "fold-1",
      "fold-2",
      "fold-3",
      "fold-4",
      "fold-5"
    ],
    "endCarriage": "end-carriage",
    "base": [
      0,
      2.4,
      0
    ],
    "endBaseY": 0,
    "sliderDefault": 0,
    "angleConvention": "theta=minDeg+(maxDeg-minDeg)*value; global leaf rotations alternate +theta/-theta; child relative rotations alternate -2theta/+2theta",
    "synchronization": "Four equal-pulley open belts on intermediate leaves 1\u20134: neighbor-keyed root and tip shafts give beta_(i+1)=-beta_i. Fixed end height selects alpha0=-beta1/2. Kinematic proposal; keying/tension not built."
  },
  "calculations": {
    "status": "Proposed inputs and analytical kinematic checks, not measured performance",
    "leafPitch_m": 0.5,
    "leaves": 6,
    "width_m": 1.5,
    "solidPanelLength_m": 0.45,
    "panelThickness_m": 0.012,
    "edgeTrim_m": 0.025,
    "deployedAngle_deg": 15,
    "packedAngle_deg": 70,
    "deployedSpan_m": 2.897777478867205,
    "packedSpan_m": 1.0260604299770064,
    "linearPackingRatio": 2.824178181135143,
    "projectedArea_m2": 4.346666218300808,
    "packedPeakRise_m": 0.46984631039295416,
    "cornerTrimRequiredAt70_m": 0.01648486451672773,
    "leafMassAssumed_kg": 3,
    "totalLeafMassAssumed_kg": 18,
    "maximumIdealGravityDriveForce_N": 54.91712763337603,
    "driveTarget_N": 250,
    "driveSpeed_m_s": 0.04,
    "mechanicalPowerAtTarget_W": 10,
    "driveEfficiencyAssumed": 0.35,
    "electricalPowerAtTarget_W": 28.571428571428573,
    "drivePinionRadius_m": 0.025,
    "driveTorqueAtTarget_Nm": 6.25,
    "illustrativeWindPressure_Pa": 1000,
    "resultingRoofForce_N": 4346.6662183008075,
    "rainRateExample_mm_h": 10,
    "idealRainCapture_L_h": 43.466662183008076,
    "equations": [
      "X(\u03b8)=Nl cos\u03b8; end height returns to fixed hinge height for even N.",
      "Global \u03b1_i=(\u22121)^i \u03b8; child relative \u03b2_i=2(\u22121)^i \u03b8 for i>0.",
      "A_proj=Nlw cos\u03b8; no validated aerodynamic coefficient is implied.",
      "Rectangular-corner screening: a\u2265(t/2)tan\u03b8; excludes barrels, tabs, seals and tolerances.",
      "U(\u03b8)=N m g l sin\u03b8/2 for identical leaf masses at midpoint; |dU/dX|=m g cot\u03b8/2.",
      "P_mech=Fv; \u03c4_pinion=Fr; circuit power includes measured efficiency and auxiliaries.",
      "Rain L/h = rain(mm/h) \u00d7 projected area(m\u00b2) \u00d7 measured collection fraction."
    ]
  },
  "prototype": {
    "name": "One-metre-pitch family, proven at coupon scale first",
    "summary": "Build a 1:2 six-leaf dry bench rig and a separate 440 \u00d7 600 mm guarded compliant-skin coupon. Record angle/force/interference, jam and power-loss behavior before a full-height non-occupied canopy.",
    "document": "prototype.json",
    "status": "Planned, not built"
  },
  "limits": [
    "Not a certified shelter, weather enclosure, load-bearing habitable roof or pressure vessel.",
    "The 3D roof is not Miura. Four proposed open equal-pulley timing transmissions plus fixed end height provide a candidate one-DoF branch; shaft keying, tensioners and tolerances have not been physically verified.",
    "Finite-thickness trim is a corner-clearance screening, not complete collision certification of fasteners, fabrics and wiring.",
    "Do not operate in wind, snow, ice or occupied public space without structural and safety qualification.",
    "Rain assemblies are manually attached only when locked; disconnected and drained before any fold. Their stage visibility is explanatory sequencing.",
    "Three skin display segments depict continuous compliant bending approximately; material strain, pressure, fatigue and PV output are not simulated.",
    "No universal component interoperability, purchase price, lifetime, water quality, energy autonomy or autonomous maintenance is demonstrated by this scene."
  ]
}