pascalorg · wass08 · Sep 10, 2026 · Sep 9, 2026 · Sep 9, 2026 · Sep 9, 2026
diff --git a/apps/editor/bunfig.toml b/apps/editor/bunfig.toml
@@ -0,0 +1,4 @@
+preload = ["../../scripts/bun-preload-three.ts"]
+
+[test]
+preload = ["../../scripts/bun-preload-three.ts"]
diff --git a/apps/editor/package.json b/apps/editor/package.json
@@ -36,7 +36,7 @@
     "react-dom": "^19.2.4",
     "tailwind-merge": "^3.5.0",
     "tailwindcss": "^4.2.1",
-    "three": "^0.185.0",
+    "three": "^0.186.0",
     "zod": ">=4.5.4 <4.6"
   },
   "devDependencies": {

diff --git a/apps/ifc-converter/package.json b/apps/ifc-converter/package.json
@@ -29,7 +29,7 @@
     "react-dom": "^19.2.4",
     "tailwind-merge": "^3.5.0",
     "tailwindcss": "^4.2.1",
-    "three": "^0.185.0",
+    "three": "^0.186.0",
     "web-ifc": "^0.0.77"
   },
   "devDependencies": {

diff --git a/bun.lock b/bun.lock
diff --git a/bunfig.toml b/bunfig.toml
@@ -0,0 +1,4 @@
+preload = ["./scripts/bun-preload-three.ts"]
+
+[test]
+preload = ["./scripts/bun-preload-three.ts"]
diff --git a/package.json b/package.json
@@ -46,7 +46,7 @@
     "@types/three": "0.184.1",
     "next": "16.3.0",
     "react-grab": "0.1.50",
-    "three": "0.185.1"
+    "three": "0.186.0"
   },
   "optionalDependencies": {
     "@tailwindcss/oxide-darwin-arm64": "4.3.0",

diff --git a/packages/capture-viewer/bunfig.toml b/packages/capture-viewer/bunfig.toml
@@ -0,0 +1,4 @@
+preload = ["../../scripts/bun-preload-three.ts"]
+
+[test]
+preload = ["../../scripts/bun-preload-three.ts"]
diff --git a/packages/capture-viewer/package.json b/packages/capture-viewer/package.json
@@ -37,7 +37,7 @@
     "@react-three/drei": "^10",
     "@react-three/fiber": "^9",
     "react": "^18 || ^19",
-    "three": "^0.185"
+    "three": "^0.186"
   },
   "devDependencies": {
     "@pascal-app/capture-protocol": "^1.0.0-beta.4",
@@ -50,7 +50,7 @@
     "@types/react": "^19.2.2",
     "@types/three": "^0.184.0",
     "react": "^19.2.4",
-    "three": "^0.185.0",
+    "three": "^0.186.0",
     "typescript": "6.0.3"
   },
   "keywords": [

diff --git a/packages/core/bunfig.toml b/packages/core/bunfig.toml
@@ -0,0 +1,4 @@
+preload = ["../../scripts/bun-preload-three.ts"]
+
+[test]
+preload = ["../../scripts/bun-preload-three.ts"]
diff --git a/packages/core/package.json b/packages/core/package.json
@@ -73,7 +73,7 @@
     "@react-three/drei": "^10",
     "@react-three/fiber": "^9",
     "react": "^18 || ^19",
-    "three": "^0.185"
+    "three": "^0.186"
   },
   "dependencies": {
     "@pascal-app/capture-protocol": "^1.0.0-beta.4",

diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
@@ -395,12 +395,25 @@ export {
   isSplineFence,
   sampleFenceSpline,
 } from './systems/fence/fence-spline'
+export { resolveRoofElevation, resolveRoofWallTopElevation } from './systems/roof/roof-elevation'
+export { RoofElevationSystem } from './systems/roof/roof-elevation-system'
+export {
+  fitRoofFootprint,
+  type RoofFootprintTarget,
+  resolveRoomRoofFootprint,
+  resolveRoomRoofFootprintOnLevel,
+} from './systems/roof/roof-footprint'
 export { resolveSlabPlacementElevation } from './systems/slab/slab-placement'
 export {
   clampSlabElevationForWalls,
   getSlabElevationUpperBound,
   type SlabElevationClamp,
 } from './systems/slab/slab-support'
+export {
+  createDefaultStairSegment,
+  createStairFlightFromStair,
+  type StairFlightOverrides,
+} from './systems/stair/stair-flight'
 export { type StairFootprintAABB, stairFootprintAABB } from './systems/stair/stair-footprint'
 export { createSurfaceOpeningPreviewController } from './systems/stair/stair-opening-preview'
 export { syncAutoStairOpenings } from './systems/stair/stair-opening-sync'

diff --git a/packages/core/src/schema/nodes/roof-elevation.test.ts b/packages/core/src/schema/nodes/roof-elevation.test.ts
@@ -0,0 +1,11 @@
+import { expect, test } from 'bun:test'
+import { RoofNode } from './roof'
+
+test('roofs default to custom level support', () => {
+  expect(RoofNode.parse({}).support).toEqual({ kind: 'level' })
+})
+
+test('wall-follow support survives JSON parsing without host references', () => {
+  const roof = RoofNode.parse({ support: { kind: 'walls' }, position: [2, -0.5, 1] })
+  expect(RoofNode.parse(JSON.parse(JSON.stringify(roof)))).toEqual(roof)
+})
diff --git a/packages/core/src/schema/nodes/roof-segment-walls.test.ts b/packages/core/src/schema/nodes/roof-segment-walls.test.ts
@@ -23,6 +23,15 @@ function segment(overrides: Partial<RoofSegmentNode> = {}): RoofSegmentNode {
 }
 
 describe('roof wall face frames', () => {
+  test('zero-height gable profiles keep their base at zero and raise the eave to five centimeters', () => {
+    const face = getRoofSegmentWallFace(segment({ wallHeight: 0 }), 'right')
+
+    expect(Math.min(...face.profile.map(([, v]) => v))).toBe(0)
+    expect(face.profile[2]?.[1]).toBe(0.05)
+    expect(face.profile[4]?.[1]).toBe(0.05)
+    expect(face.profile[3]?.[1]).toBeCloseTo(0.05 + 3.05 * Math.tan((40 * Math.PI) / 180))
+  })
+
   test('frame z = 0 lands on the nominal footprint (wall mid-plane)', () => {
     const seg = segment()
     // front face, u at the face middle, v = 1, mid-plane.

diff --git a/packages/core/src/schema/nodes/roof-segment-walls.ts b/packages/core/src/schema/nodes/roof-segment-walls.ts
@@ -16,7 +16,9 @@ import { getDutchRoofMetrics, getSegmentSlopeFrame } from './roof-segment'
  * (`getVol(wallThickness / 2, 0, 0, …)`): the volume is the segment
  * footprint extended outward by `wallThickness / 2`, which drops the eave
  * line by `(wallThickness / 2) · tanθ` and raises the ridge by the same
- * amount so the apex stays at `wallHeight + activeRh`.
+ * amount so the apex stays at `wallHeight + activeRh` unless the eave
+ * hits the CSG minimum. The base stays at 0; the eave is raised to at
+ * least 0.05 above it to avoid sinking the shell into the supporting wall.
  */
 
 export type RoofWallFaceId = 'front' | 'back' | 'right' | 'left'
@@ -76,7 +78,7 @@ function getWallVolumeFrame(node: SegmentWallInputs): WallVolumeFrame {
   const autoDrop = (wallThickness / 2) * tanTheta
   const wV = Math.max(0.01, node.width + wallThickness)
   const dV = Math.max(0.01, node.depth + wallThickness)
-  const eaveY = Math.max(0.01, node.wallHeight - autoDrop)
+  const eaveY = Math.max(0.05, node.wallHeight - autoDrop)
   let rh = activeRh
   if (activeRh > 0) {
     rh = activeRh + autoDrop

diff --git a/packages/core/src/schema/nodes/roof.ts b/packages/core/src/schema/nodes/roof.ts
@@ -14,6 +14,7 @@ export type RoofSurfaceMaterialSpec = {
 export const RoofSupport = z
   .discriminatedUnion('kind', [
     z.object({ kind: z.literal('level') }),
+    z.object({ kind: z.literal('walls') }),
     z.object({
       kind: z.literal('roof'),
       roofSegmentId: RoofSegmentNode.shape.id,
@@ -49,7 +50,7 @@ export const RoofNode = BaseNode.extend({
   When not being edited, segments are visually combined into a single solid.
   - position: center position of the roof group
   - rotation: rotation around Y axis
-  - support: level placement or an explicit roof-surface attachment
+  - support: custom level placement, spatial wall-top following, or a roof-surface attachment
   - children: array of RoofSegmentNode IDs
   `,
 )