{
  "version": 1,
  "viewport": { "x": 0, "y": 0, "width": 320, "height": 240 },
  "cases": [
    {
      "name": "nested ancestor clips and actionability",
      "swift": true,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": null,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "ScrollView",
          "label": "Outer",
          "rect": { "x": 16, "y": 20, "width": 180, "height": 180 },
          "enabled": true,
          "hittable": false,
          "depth": 1,
          "parentIndex": 0
        },
        {
          "index": 2,
          "type": "ScrollView",
          "label": "Inner",
          "rect": { "x": 80, "y": 60, "width": 100, "height": 80 },
          "enabled": true,
          "hittable": false,
          "depth": 2,
          "parentIndex": 1
        },
        {
          "index": 3,
          "type": "Button",
          "label": "Partially visible",
          "rect": { "x": 150, "y": 110, "width": 100, "height": 60 },
          "enabled": true,
          "hittable": true,
          "depth": 3,
          "parentIndex": 2
        },
        {
          "index": 4,
          "type": "Button",
          "label": "Escaped child",
          "rect": { "x": 190, "y": 110, "width": 20, "height": 20 },
          "enabled": true,
          "hittable": true,
          "depth": 3,
          "parentIndex": 2
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [],
        "nodes": [
          {
            "index": 0,
            "type": "Application",
            "label": "App",
            "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "ScrollView",
            "label": "Outer",
            "rect": { "x": 16, "y": 20, "width": 180, "height": 180 },
            "depth": 1,
            "parentIndex": 0,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 2,
            "type": "ScrollView",
            "label": "Inner",
            "rect": { "x": 80, "y": 60, "width": 100, "height": 80 },
            "depth": 2,
            "parentIndex": 1,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 3,
            "type": "Button",
            "label": "Partially visible",
            "rect": { "x": 150, "y": 110, "width": 30, "height": 30 },
            "depth": 3,
            "parentIndex": 2,
            "hittable": true,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "viewport edge remains positively actionable",
      "swift": true,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": null,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "Button",
          "label": "Edge",
          "rect": { "x": 300, "y": 100, "width": 40, "height": 40 },
          "enabled": true,
          "hittable": true,
          "depth": 1,
          "parentIndex": 0
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [],
        "nodes": [
          {
            "index": 0,
            "type": "Application",
            "label": "App",
            "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "Button",
            "label": "Edge",
            "rect": { "x": 300, "y": 100, "width": 20, "height": 40 },
            "depth": 1,
            "parentIndex": 0,
            "hittable": true,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "geometryless cursor nodes keep independent descendants",
      "swift": false,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": null,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "Other",
          "label": "No frame",
          "enabled": true,
          "hittable": false,
          "depth": 1,
          "parentIndex": 0
        },
        {
          "index": 2,
          "type": "Button",
          "label": "Child",
          "rect": { "x": 20, "y": 20, "width": 40, "height": 40 },
          "enabled": true,
          "hittable": true,
          "depth": 2,
          "parentIndex": 1
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [],
        "nodes": [
          {
            "index": 0,
            "type": "Application",
            "label": "App",
            "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "Other",
            "label": "No frame",
            "rect": null,
            "depth": 1,
            "parentIndex": 0,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 2,
            "type": "Button",
            "label": "Child",
            "rect": { "x": 20, "y": 20, "width": 40, "height": 40 },
            "depth": 2,
            "parentIndex": 1,
            "hittable": true,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "plain viewport keeps child visibility independent",
      "swift": true,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": null,
      "scope": null,
      "foldPolicy": "plain-viewport",
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "ScrollView",
          "label": "Scroll",
          "rect": { "x": 0, "y": 100, "width": 320, "height": 40 },
          "enabled": true,
          "hittable": false,
          "depth": 1,
          "parentIndex": 0
        },
        {
          "index": 2,
          "type": "StaticText",
          "label": "Outside scroll clip",
          "rect": { "x": 10, "y": 200, "width": 80, "height": 20 },
          "enabled": true,
          "hittable": false,
          "depth": 2,
          "parentIndex": 1
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [],
        "nodes": [
          {
            "index": 0,
            "type": "Application",
            "label": "App",
            "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "ScrollView",
            "label": "Scroll",
            "rect": { "x": 0, "y": 100, "width": 320, "height": 40 },
            "depth": 1,
            "parentIndex": 0,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 2,
            "type": "StaticText",
            "label": "Outside scroll clip",
            "rect": { "x": 10, "y": 200, "width": 80, "height": 20 },
            "depth": 2,
            "parentIndex": 1,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "raw projection preserves reported geometry",
      "swift": true,
      "projection": "raw",
      "interactiveOnly": true,
      "depth": null,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "ScrollView",
          "label": "Outer",
          "rect": { "x": 16, "y": 20, "width": 180, "height": 180 },
          "enabled": true,
          "hittable": false,
          "depth": 1,
          "parentIndex": 0
        },
        {
          "index": 2,
          "type": "Button",
          "label": "Escaped child",
          "rect": { "x": 210, "y": 80, "width": 100, "height": 40 },
          "enabled": true,
          "hittable": true,
          "depth": 2,
          "parentIndex": 1
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [],
        "nodes": [
          {
            "index": 0,
            "type": "Application",
            "label": "App",
            "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "ScrollView",
            "label": "Outer",
            "rect": { "x": 16, "y": 20, "width": 180, "height": 180 },
            "depth": 1,
            "parentIndex": 0,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 2,
            "type": "Button",
            "label": "Escaped child",
            "rect": { "x": 210, "y": 80, "width": 100, "height": 40 },
            "depth": 2,
            "parentIndex": 1,
            "hittable": true,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "raw unscoped depth uses the acquisition frontier",
      "swift": true,
      "projection": "raw",
      "interactiveOnly": false,
      "depth": 1,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "ScrollView",
          "label": "Outer",
          "rect": { "x": 16, "y": 20, "width": 180, "height": 180 },
          "enabled": true,
          "hittable": false,
          "depth": 1,
          "parentIndex": 0
        },
        {
          "index": 2,
          "type": "Button",
          "label": "Deep child",
          "rect": { "x": 20, "y": 40, "width": 80, "height": 40 },
          "enabled": true,
          "hittable": true,
          "depth": 2,
          "parentIndex": 1
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [],
        "nodes": [
          {
            "index": 0,
            "type": "Application",
            "label": "App",
            "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "ScrollView",
            "label": "Outer",
            "rect": { "x": 16, "y": 20, "width": 180, "height": 180 },
            "depth": 1,
            "parentIndex": 0,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "scope reroots wrappers and regular depth",
      "swift": true,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": 1,
      "scope": "Target",
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [],
      "qualityLabels": ["App", "Wrapper", "Target", "Save"],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "Other",
          "label": "Wrapper",
          "rect": { "x": 10, "y": 10, "width": 200, "height": 100 },
          "enabled": true,
          "hittable": false,
          "depth": 1,
          "parentIndex": 0
        },
        {
          "index": 2,
          "type": "Other",
          "label": "Target",
          "rect": { "x": 10, "y": 10, "width": 200, "height": 100 },
          "enabled": true,
          "hittable": false,
          "depth": 2,
          "parentIndex": 1
        },
        {
          "index": 3,
          "type": "Button",
          "label": "Save",
          "rect": { "x": 20, "y": 20, "width": 80, "height": 40 },
          "enabled": true,
          "hittable": true,
          "depth": 3,
          "parentIndex": 2
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [],
        "nodes": [
          {
            "index": 0,
            "type": "Other",
            "label": "Target",
            "rect": { "x": 10, "y": 10, "width": 200, "height": 100 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "Button",
            "label": "Save",
            "rect": { "x": 20, "y": 20, "width": 80, "height": 40 },
            "depth": 1,
            "parentIndex": 0,
            "hittable": true,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "scope depth zero retains only the matched root",
      "swift": true,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": 0,
      "scope": "Target",
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "Other",
          "label": "Target",
          "rect": { "x": 10, "y": 10, "width": 200, "height": 100 },
          "enabled": true,
          "hittable": false,
          "depth": 1,
          "parentIndex": 0
        },
        {
          "index": 2,
          "type": "Button",
          "label": "Save",
          "rect": { "x": 20, "y": 20, "width": 80, "height": 40 },
          "enabled": true,
          "hittable": true,
          "depth": 2,
          "parentIndex": 1
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [],
        "nodes": [
          {
            "index": 0,
            "type": "Other",
            "label": "Target",
            "rect": { "x": 10, "y": 10, "width": 200, "height": 100 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "raw scope depth counts source depth",
      "swift": true,
      "projection": "raw",
      "interactiveOnly": false,
      "depth": 1,
      "scope": "Target",
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "Other",
          "label": "Target",
          "rect": { "x": 10, "y": 10, "width": 200, "height": 100 },
          "enabled": true,
          "hittable": false,
          "depth": 1,
          "parentIndex": 0
        },
        {
          "index": 2,
          "type": "Button",
          "label": "Save",
          "rect": { "x": 20, "y": 20, "width": 80, "height": 40 },
          "enabled": true,
          "hittable": true,
          "depth": 2,
          "parentIndex": 1
        },
        {
          "index": 3,
          "type": "StaticText",
          "label": "Too deep",
          "rect": { "x": 20, "y": 70, "width": 80, "height": 20 },
          "enabled": true,
          "hittable": false,
          "depth": 3,
          "parentIndex": 1
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [],
        "nodes": [
          {
            "index": 0,
            "type": "Other",
            "label": "Target",
            "rect": { "x": 10, "y": 10, "width": 200, "height": 100 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "Button",
            "label": "Save",
            "rect": { "x": 20, "y": 20, "width": 80, "height": 40 },
            "depth": 1,
            "parentIndex": 0,
            "hittable": true,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "hidden scroll content becomes directional hints",
      "swift": true,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": null,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "ScrollView",
          "label": "Scroll",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 100 },
          "enabled": true,
          "hittable": false,
          "depth": 1,
          "parentIndex": 0
        },
        {
          "index": 2,
          "type": "Button",
          "label": "Above",
          "rect": { "x": 10, "y": -40, "width": 40, "height": 20 },
          "enabled": true,
          "hittable": true,
          "depth": 2,
          "parentIndex": 1
        },
        {
          "index": 3,
          "type": "Button",
          "label": "Visible",
          "rect": { "x": 10, "y": 10, "width": 40, "height": 20 },
          "enabled": true,
          "hittable": true,
          "depth": 2,
          "parentIndex": 1
        },
        {
          "index": 4,
          "type": "Button",
          "label": "Below",
          "rect": { "x": 10, "y": 110, "width": 40, "height": 20 },
          "enabled": true,
          "hittable": true,
          "depth": 2,
          "parentIndex": 1
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [],
        "nodes": [
          {
            "index": 0,
            "type": "Application",
            "label": "App",
            "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "ScrollView",
            "label": "Scroll",
            "rect": { "x": 0, "y": 0, "width": 320, "height": 100 },
            "depth": 1,
            "parentIndex": 0,
            "hittable": false,
            "hiddenContentAbove": true,
            "hiddenContentBelow": true
          },
          {
            "index": 2,
            "type": "Button",
            "label": "Visible",
            "rect": { "x": 10, "y": 10, "width": 40, "height": 20 },
            "depth": 2,
            "parentIndex": 1,
            "hittable": true,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "interactive only compacts semantic representatives",
      "swift": false,
      "projection": "regular",
      "interactiveOnly": true,
      "depth": null,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "Table",
          "label": "Settings",
          "rect": { "x": 0, "y": 40, "width": 320, "height": 200 },
          "enabled": true,
          "hittable": false,
          "depth": 1,
          "parentIndex": 0
        },
        {
          "index": 2,
          "type": "Cell",
          "label": "General",
          "rect": { "x": 16, "y": 80, "width": 288, "height": 52 },
          "enabled": true,
          "hittable": false,
          "depth": 2,
          "parentIndex": 1
        },
        {
          "index": 3,
          "type": "Button",
          "label": "General",
          "rect": { "x": 16, "y": 80, "width": 288, "height": 52 },
          "enabled": true,
          "hittable": true,
          "depth": 3,
          "parentIndex": 2
        },
        {
          "index": 4,
          "type": "StaticText",
          "label": "General",
          "rect": { "x": 16, "y": 80, "width": 288, "height": 52 },
          "enabled": true,
          "hittable": false,
          "depth": 4,
          "parentIndex": 3
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [],
        "nodes": [
          {
            "index": 0,
            "type": "Application",
            "label": "App",
            "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "Table",
            "label": "Settings",
            "rect": { "x": 0, "y": 40, "width": 320, "height": 200 },
            "depth": 1,
            "parentIndex": 0,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 2,
            "type": "Cell",
            "label": "General",
            "rect": { "x": 16, "y": 80, "width": 288, "height": 52 },
            "depth": 2,
            "parentIndex": 1,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "unavailable hittability fails closed",
      "swift": false,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": null,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [{ "kind": "unavailable-fact", "fact": "hittability" }],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "Button",
          "label": "Maybe actionable",
          "rect": { "x": 20, "y": 20, "width": 80, "height": 40 },
          "enabled": true,
          "hittable": true,
          "depth": 1,
          "parentIndex": 0
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": false,
        "residue": [{ "kind": "unavailable-fact", "fact": "hittability" }],
        "nodes": [
          {
            "index": 0,
            "type": "Application",
            "label": "App",
            "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "Button",
            "label": "Maybe actionable",
            "rect": { "x": 20, "y": 20, "width": 80, "height": 40 },
            "depth": 1,
            "parentIndex": 0,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    },
    {
      "name": "malformed parent is a typed failure",
      "swift": false,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": null,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "Button",
          "label": "Broken",
          "rect": { "x": 20, "y": 20, "width": 80, "height": 40 },
          "enabled": true,
          "hittable": true,
          "depth": 1,
          "parentIndex": 99
        }
      ],
      "expected": {
        "outcome": "failure",
        "error": {
          "code": "IOS_SNAPSHOT_ENGINE_FAILED",
          "reason": "malformed-graph"
        },
        "nodes": []
      }
    },
    {
      "name": "missing viewport is a typed failure",
      "swift": false,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": null,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "viewportEvidence": { "kind": "missing", "reason": "not-provided" },
      "truncated": false,
      "residue": [{ "kind": "missing-viewport", "reason": "not-provided" }],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        }
      ],
      "expected": {
        "outcome": "failure",
        "error": {
          "code": "IOS_SNAPSHOT_ENGINE_FAILED",
          "reason": "missing-viewport"
        },
        "nodes": []
      }
    },
    {
      "name": "invalid viewport is a typed failure",
      "swift": false,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": null,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "viewportEvidence": {
        "kind": "reported",
        "rect": { "x": 0, "y": 0, "width": 0, "height": 240 }
      },
      "truncated": false,
      "residue": [],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        }
      ],
      "expected": {
        "outcome": "failure",
        "error": {
          "code": "IOS_SNAPSHOT_ENGINE_FAILED",
          "reason": "invalid-viewport"
        },
        "nodes": []
      }
    },
    {
      "name": "residue and truncation survive publication",
      "swift": true,
      "projection": "regular",
      "interactiveOnly": false,
      "depth": null,
      "scope": null,
      "foldPolicy": "cursor-projected",
      "truncated": true,
      "residue": [
        {
          "kind": "provider-pruned",
          "fields": ["scope", "nodes"]
        },
        {
          "kind": "truncated",
          "dimension": "payload",
          "limit": 2000
        }
      ],
      "nodes": [
        {
          "index": 0,
          "type": "Application",
          "label": "App",
          "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
          "enabled": true,
          "hittable": false,
          "depth": 0
        },
        {
          "index": 1,
          "type": "Button",
          "label": "Continue",
          "rect": { "x": 20, "y": 20, "width": 100, "height": 44 },
          "enabled": true,
          "hittable": true,
          "depth": 1,
          "parentIndex": 0
        }
      ],
      "expected": {
        "outcome": "success",
        "truncated": true,
        "residue": [
          {
            "kind": "provider-pruned",
            "fields": ["scope", "nodes"]
          },
          {
            "kind": "truncated",
            "dimension": "payload",
            "limit": 2000
          }
        ],
        "nodes": [
          {
            "index": 0,
            "type": "Application",
            "label": "App",
            "rect": { "x": 0, "y": 0, "width": 320, "height": 240 },
            "depth": 0,
            "parentIndex": null,
            "hittable": false,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          },
          {
            "index": 1,
            "type": "Button",
            "label": "Continue",
            "rect": { "x": 20, "y": 20, "width": 100, "height": 44 },
            "depth": 1,
            "parentIndex": 0,
            "hittable": true,
            "hiddenContentAbove": false,
            "hiddenContentBelow": false
          }
        ]
      }
    }
  ]
}