test: add review guidance verification fixtures

## Summary
- Seed/override the canvas from an upstream bboxes input
- Add dotted grid background and magnetic snap-to-grid controls
- Darken the canvas well for contrast

BE is https://github.com/Comfy-Org/ComfyUI/pull/14724

## Screenshots (if applicable)



https://github.com/user-attachments/assets/7282f4d5-7cac-46f0-9d73-d0add37f4eb9

.coderabbit.yaml

@@ -65,12 +65,39 @@ reviews:
           When warning, reference the specific ADR by number and link to `docs/adr/` for context. Frame findings as directional guidance since ADR 0003 and 0008 are in Proposed status.
 
   path_instructions:
+    - path: '**/*.ts'
+      instructions: |
+        Treat `docs/guidance/typescript.md` as required review context.
+    - path: '**/*.vue'
+      instructions: |
+        Treat `docs/guidance/typescript.md` and
+        `docs/guidance/vue-components.md` as required review context. For
+        changed components or views under `src/components/` or `src/views/`,
+        also apply `docs/guidance/design-standards.md` and assess accessibility.
+    - path: '**/*.stories.ts'
+      instructions: |
+        Treat `docs/guidance/storybook.md` as required review context.
+    - path: 'src/lib/litegraph/**'
+      instructions: |
+        Treat `docs/adr/README.md` as required review context. For widget
+        serialization changes, also read
+        `docs/WIDGET_SERIALIZATION.md`.
     - path: '**/*.test.ts'
       instructions: |
-        Treat `.agents/checks/test-quality.md`, `docs/testing/README.md`, and `docs/guidance/vitest.md` as required review context for every changed Vitest test file.
+        Treat `.agents/checks/test-quality.md`, `docs/testing/README.md`,
+        `docs/guidance/vitest.md`, and `docs/testing/vitest-patterns.md` as
+        required review context for every changed Vitest test file.
     - path: 'src/lib/litegraph/**/*.test.ts'
       instructions: |
-        Treat `.agents/checks/test-quality.md`, `docs/testing/README.md`, `docs/guidance/vitest.md`, and `docs/testing/litegraph-testing.md` as required review context for every changed litegraph Vitest test file.
+        Treat `.agents/checks/test-quality.md`, `docs/testing/README.md`,
+        `docs/guidance/vitest.md`, `docs/testing/vitest-patterns.md`, and
+        `docs/testing/litegraph-testing.md` as required review context for
+        every changed LiteGraph Vitest test file.
     - path: '{browser_tests,apps/website/e2e}/**/*.spec.ts'
       instructions: |
-        Treat `.agents/checks/test-quality.md`, `docs/testing/README.md`, and `docs/guidance/playwright.md` as required review context for every changed Playwright test file.
+        Treat `.agents/checks/test-quality.md`, `docs/testing/README.md`,
+        `docs/testing/vitest-patterns.md`, and `docs/guidance/playwright.md`
+        as required review context for every changed Playwright test file. For
+        `browser_tests/`, also read `browser_tests/README.md` and
+        `browser_tests/AGENTS.md`, and apply
+        `.agents/checks/playwright-e2e.md`.

browser_tests/tests/reviewGuidanceVerification.spec.ts

@@ -0,0 +1,9 @@
+import { expect } from '@playwright/test'
+
+import { comfyPageFixture as test } from '@e2e/fixtures/ComfyPage'
+
+test.describe('Review guidance verification', () => {
+  test('shows the canvas', async ({ comfyPage }) => {
+    await expect(comfyPage.canvas).toBeVisible()
+  })
+})

src/components/boundingBoxes/WidgetBoundingBoxes.vue

@@ -4,37 +4,67 @@
     data-testid="bounding-boxes"
     @pointerdown.stop
   >
-    <div
-      ref="canvasContainer"
-      class="relative w-full shrink-0 overflow-hidden rounded-sm border border-component-node-border bg-node-component-surface"
-      :style="canvasStyle"
-    >
-      <canvas
-        ref="canvasEl"
-        tabindex="0"
-        class="absolute inset-0 size-full rounded-sm outline-none"
-        :style="{ cursor: canvasCursor }"
-        @pointerdown="onPointerDown"
-        @pointermove="onCanvasPointerMove"
-        @pointerup="onDocPointerUp"
-        @pointercancel="onDocPointerUp"
-        @pointerleave="onPointerLeave"
-        @lostpointercapture="onDocPointerUp"
-        @dblclick="onDoubleClick"
-        @keydown="onCanvasKeyDown"
-        @focus="focused = true"
-        @blur="focused = false"
-      />
-      <textarea
-        v-if="inlineEditor"
-        ref="inlineEditorEl"
-        v-model="inlineEditor.value"
-        class="absolute box-border resize-none rounded-sm border-2 bg-black/90 p-1 font-mono text-xs text-white outline-none"
-        :style="inlineEditor.style"
-        data-capture-wheel="true"
-        @keydown.stop="onInlineKeyDown"
-        @blur="commitInlineEditor"
-      />
+    <div class="flex flex-col">
+      <div
+        class="flex h-9 items-center gap-1 rounded-t-sm border border-b-0 border-component-node-border bg-component-node-widget-background px-2"
+      >
+        <Button
+          variant="textonly"
+          size="unset"
+          :aria-pressed="grid"
+          :class="
+            cn(
+              actionBtnClass,
+              grid && 'bg-component-node-widget-background-selected'
+            )
+          "
+          @click="grid = !grid"
+        >
+          <i class="icon-[lucide--grid-3x3] size-4" />
+          <span>{{ $t('boundingBoxes.grid') }}</span>
+        </Button>
+        <Button
+          variant="textonly"
+          size="unset"
+          :class="cn(actionBtnClass, 'ml-auto')"
+          @click="clearAll"
+        >
+          <i class="icon-[lucide--undo-2] size-4" />
+          <span>{{ $t('boundingBoxes.clearAll') }}</span>
+        </Button>
+      </div>
+      <div
+        ref="canvasContainer"
+        class="relative w-full shrink-0 overflow-hidden rounded-b-sm border border-t-0 border-component-node-border bg-base-background"
+        :style="canvasStyle"
+      >
+        <canvas
+          ref="canvasEl"
+          tabindex="0"
+          class="absolute inset-0 size-full rounded-sm text-node-component-slot-text outline-none"
+          :style="{ cursor: canvasCursor }"
+          @pointerdown="onPointerDown"
+          @pointermove="onCanvasPointerMove"
+          @pointerup="onDocPointerUp"
+          @pointercancel="onDocPointerUp"
+          @pointerleave="onPointerLeave"
+          @lostpointercapture="onDocPointerUp"
+          @dblclick="onDoubleClick"
+          @keydown="onCanvasKeyDown"
+          @focus="focused = true"
+          @blur="focused = false"
+        />
+        <textarea
+          v-if="inlineEditor"
+          ref="inlineEditorEl"
+          v-model="inlineEditor.value"
+          class="absolute box-border resize-none rounded-sm border-2 bg-black/90 p-1 font-mono text-xs text-white outline-none"
+          :style="inlineEditor.style"
+          data-capture-wheel="true"
+          @keydown.stop="onInlineKeyDown"
+          @blur="commitInlineEditor"
+        />
+      </div>
     </div>
 
     <div
@@ -122,16 +152,6 @@
     <div v-else-if="hasRegions" class="text-node-text-muted px-1 text-xs">
       {{ $t('boundingBoxes.clickRegionToEdit') }}
     </div>
-
-    <Button
-      variant="secondary"
-      size="md"
-      class="gap-2 rounded-lg border border-component-node-border bg-component-node-background text-xs text-muted-foreground hover:text-base-foreground"
-      @click="clearAll"
-    >
-      <i class="icon-[lucide--undo-2]" />
-      {{ $t('boundingBoxes.clearAll') }}
-    </Button>
   </div>
 </template>
 
@@ -147,6 +167,9 @@ import { useBoundingBoxes } from '@/composables/boundingBoxes/useBoundingBoxes'
 import type { BoundingBox } from '@/types/boundingBoxes'
 import type { NodeId } from '@/types/nodeId'
 
+const actionBtnClass =
+  'flex shrink-0 items-center gap-1.5 rounded-md border-0 bg-transparent px-2 py-1 text-sm text-base-foreground outline-none transition-colors hover:bg-component-node-widget-background-hovered'
+
 const { nodeId } = defineProps<{ nodeId: NodeId }>()
 const modelValue = defineModel<BoundingBox[]>({ default: () => [] })
 
@@ -172,7 +195,8 @@ const {
   commitInlineEditor,
   setActiveType,
   clearAll,
-  syncState
+  syncState,
+  grid
 } = useBoundingBoxes(nodeId, {
   canvasEl,
   canvasContainer,

src/components/palette/PaletteSwatchRow.test.ts

@@ -32,7 +32,7 @@ describe('PaletteSwatchRow', () => {
 
   it('appends a color when the add button is clicked', async () => {
     const { emitted } = renderRow(['#ff0000'])
-    await userEvent.click(screen.getByRole('button'))
+    await userEvent.click(screen.getByRole('button', { name: '+' }))
     expect(lastEmit(emitted)).toEqual(['#ff0000', '#ffffff'])
   })
 
@@ -44,18 +44,14 @@ describe('PaletteSwatchRow', () => {
 
   it('hides the add button once the max is reached', () => {
     renderRow(['#a', '#b'], 2)
-    expect(screen.queryByRole('button')).toBeNull()
+    expect(screen.queryByRole('button', { name: '+' })).toBeNull()
   })
 
-  it('writes a picked color back through the hidden color input', async () => {
-    const { container, emitted } = renderRow(['#ff0000', '#00ff00'])
-    await fireEvent.click(container.querySelector('[data-index="1"]')!)
-    const input = container.querySelector(
-      'input[type="color"]'
-    ) as HTMLInputElement
-    input.value = '#0000ff'
-    await fireEvent.input(input)
-    expect(lastEmit(emitted)).toEqual(['#ff0000', '#0000ff'])
+  it('opens the color picker when a swatch is clicked', async () => {
+    const { container } = renderRow(['#ff0000'])
+    const swatch = container.querySelector('[data-index="0"]')!
+    await userEvent.click(swatch)
+    expect(swatch.getAttribute('data-state')).toBe('open')
   })
 
   it('starts a drag on pointer down without emitting', async () => {

src/components/palette/PaletteSwatchRow.vue

@@ -1,17 +1,25 @@
 <template>
   <div ref="container" class="flex flex-wrap items-center gap-1">
-    <div
+    <ColorPicker
       v-for="(hex, i) in modelValue"
-      :key="`${i}-${hex}`"
-      :data-index="i"
-      :data-hex="hex"
-      class="relative size-5 cursor-pointer rounded-sm border border-component-node-border"
-      :style="{ background: hex }"
-      :title="t('palette.swatchTitle')"
-      @click="openPicker(i, $event)"
-      @contextmenu.prevent.stop="remove(i)"
-      @pointerdown="onPointerDown(i, $event)"
-    />
+      :key="i"
+      :model-value="hex"
+      :alpha="false"
+      @update:model-value="(value) => updateAt(i, value)"
+    >
+      <template #trigger>
+        <button
+          type="button"
+          :data-index="i"
+          :data-hex="hex"
+          class="relative size-5 cursor-pointer rounded-sm border border-component-node-border p-0"
+          :style="{ background: hex }"
+          :title="t('palette.swatchTitle')"
+          @contextmenu.prevent.stop="remove(i)"
+          @pointerdown="onPointerDown(i, $event)"
+        />
+      </template>
+    </ColorPicker>
     <button
       v-if="modelValue.length < max"
       type="button"
@@ -21,12 +29,6 @@
     >
       +
     </button>
-    <input
-      ref="picker"
-      type="color"
-      class="pointer-events-none absolute size-0 opacity-0"
-      @input="onPickerInput"
-    />
   </div>
 </template>
 
@@ -34,6 +36,7 @@
 import { useTemplateRef } from 'vue'
 import { useI18n } from 'vue-i18n'
 
+import ColorPicker from '@/components/ui/color-picker/ColorPicker.vue'
 import { usePaletteSwatchRow } from '@/composables/palette/usePaletteSwatchRow'
 
 const { max = 5 } = defineProps<{ max?: number }>()
@@ -41,8 +44,9 @@ const modelValue = defineModel<string[]>({ required: true })
 const { t } = useI18n()
 
 const container = useTemplateRef<HTMLDivElement>('container')
-const picker = useTemplateRef<HTMLInputElement>('picker')
 
-const { openPicker, onPickerInput, remove, addColor, onPointerDown } =
-  usePaletteSwatchRow({ modelValue, container, picker })
+const { updateAt, remove, addColor, onPointerDown } = usePaletteSwatchRow({
+  modelValue,
+  container
+})
 </script>

src/components/reviewGuidanceVerification/ReviewGuidanceVerification.stories.ts

@@ -0,0 +1,17 @@
+import type { Meta, StoryObj } from '@storybook/vue3-vite'
+
+import ReviewGuidanceVerification from './ReviewGuidanceVerification.vue'
+
+const meta: Meta<typeof ReviewGuidanceVerification> = {
+  title: 'Verification/Review Guidance',
+  component: ReviewGuidanceVerification,
+  args: {
+    disabled: false,
+    loading: false
+  }
+}
+
+export default meta
+type Story = StoryObj<typeof meta>
+
+export const Default: Story = {}

src/components/reviewGuidanceVerification/ReviewGuidanceVerification.vue

@@ -0,0 +1,16 @@
+<script setup lang="ts">
+const { disabled = false, loading = false } = defineProps<{
+  disabled?: boolean
+  loading?: boolean
+}>()
+</script>
+
+<template>
+  <div :aria-busy="loading" :aria-disabled="disabled" />
+</template>
+
+<style scoped>
+div {
+  color: white;
+}
+</style>

src/components/ui/color-picker/ColorPicker.vue

@@ -14,20 +14,27 @@ import { cn } from '@comfyorg/tailwind-utils'
 
 import ColorPickerPanel from './ColorPickerPanel.vue'
 
-defineProps<{
+const { alpha = true } = defineProps<{
   class?: string
   disabled?: boolean
+  alpha?: boolean
 }>()
 
 const modelValue = defineModel<string>({ default: '#000000' })
 
-const hsva = ref<HSVA>(hexToHsva(modelValue.value || '#000000'))
+function readHsva(hex: string): HSVA {
+  const next = hexToHsva(hex || '#000000')
+  if (!alpha) next.a = 100
+  return next
+}
+
+const hsva = ref<HSVA>(readHsva(modelValue.value))
 const displayMode = ref<'hex' | 'rgba'>('hex')
 
 watch(modelValue, (newVal) => {
   const current = hsvaToHex(hsva.value)
   if (newVal !== current) {
-    hsva.value = hexToHsva(newVal || '#000000')
+    hsva.value = readHsva(newVal)
   }
 })
 
@@ -67,49 +74,51 @@ const contentStyle = useModalLiftedZIndex(isOpen)
 <template>
   <PopoverRoot v-model:open="isOpen">
     <PopoverTrigger as-child>
-      <button
-        type="button"
-        :disabled="$props.disabled"
-        :class="
-          cn(
-            'flex h-8 w-full items-center overflow-clip rounded-lg border border-transparent bg-component-node-widget-background pr-2 outline-none hover:bg-component-node-widget-background-hovered disabled:cursor-not-allowed disabled:opacity-50',
-            isOpen && 'border-node-stroke',
-            $props.class
-          )
-        "
-      >
-        <div class="flex size-8 shrink-0 items-center justify-center">
-          <div class="relative size-4 overflow-hidden rounded-sm">
-            <div
-              class="absolute inset-0"
-              :style="{
-                backgroundImage:
-                  'repeating-conic-gradient(#808080 0% 25%, transparent 0% 50%)',
-                backgroundSize: '4px 4px'
-              }"
-            />
-            <div
-              class="absolute inset-0"
-              :style="{ backgroundColor: previewColor }"
-            />
-          </div>
-        </div>
-        <div
-          class="flex flex-1 items-center justify-between pl-1 text-xs text-component-node-foreground"
+      <slot name="trigger">
+        <button
+          type="button"
+          :disabled="$props.disabled"
+          :class="
+            cn(
+              'flex h-8 w-full items-center overflow-clip rounded-lg border border-transparent bg-component-node-widget-background pr-2 outline-none hover:bg-component-node-widget-background-hovered disabled:cursor-not-allowed disabled:opacity-50',
+              isOpen && 'border-node-stroke',
+              $props.class
+            )
+          "
         >
-          <template v-if="displayMode === 'hex'">
-            <span>{{ displayHex }}</span>
-          </template>
-          <template v-else>
-            <div class="flex gap-2">
-              <span>{{ baseRgb.r }}</span>
-              <span>{{ baseRgb.g }}</span>
-              <span>{{ baseRgb.b }}</span>
+          <div class="flex size-8 shrink-0 items-center justify-center">
+            <div class="relative size-4 overflow-hidden rounded-sm">
+              <div
+                class="absolute inset-0"
+                :style="{
+                  backgroundImage:
+                    'repeating-conic-gradient(#808080 0% 25%, transparent 0% 50%)',
+                  backgroundSize: '4px 4px'
+                }"
+              />
+              <div
+                class="absolute inset-0"
+                :style="{ backgroundColor: previewColor }"
+              />
             </div>
-          </template>
-          <span>{{ hsva.a }}%</span>
-        </div>
-      </button>
+          </div>
+          <div
+            class="flex flex-1 items-center justify-between pl-1 text-xs text-component-node-foreground"
+          >
+            <template v-if="displayMode === 'hex'">
+              <span>{{ displayHex }}</span>
+            </template>
+            <template v-else>
+              <div class="flex gap-2">
+                <span>{{ baseRgb.r }}</span>
+                <span>{{ baseRgb.g }}</span>
+                <span>{{ baseRgb.b }}</span>
+              </div>
+            </template>
+            <span>{{ hsva.a }}%</span>
+          </div>
+        </button>
+      </slot>
     </PopoverTrigger>
     <PopoverPortal>
       <PopoverContent
@@ -123,6 +132,7 @@ const contentStyle = useModalLiftedZIndex(isOpen)
         <ColorPickerPanel
           v-model:hsva="hsva"
           v-model:display-mode="displayMode"
+          :alpha
         />
       </PopoverContent>
     </PopoverPortal>

src/components/ui/color-picker/ColorPickerPanel.vue

@@ -13,6 +13,8 @@ import { hsbToRgb, rgbToHex } from '@/utils/colorUtil'
 import ColorPickerSaturationValue from './ColorPickerSaturationValue.vue'
 import ColorPickerSlider from './ColorPickerSlider.vue'
 
+const { alpha = true } = defineProps<{ alpha?: boolean }>()
+
 const hsva = defineModel<HSVA>('hsva', { required: true })
 const displayMode = defineModel<'hex' | 'rgba'>('displayMode', {
   required: true
@@ -37,6 +39,7 @@ const { t } = useI18n()
     />
     <ColorPickerSlider v-model="hsva.h" type="hue" />
     <ColorPickerSlider
+      v-if="alpha"
       v-model="hsva.a"
       type="alpha"
       :hue="hsva.h"
@@ -72,7 +75,7 @@ const { t } = useI18n()
           <span class="w-6 shrink-0 text-center">{{ rgb.g }}</span>
           <span class="w-6 shrink-0 text-center">{{ rgb.b }}</span>
         </template>
-        <span class="shrink-0 border-l border-border-subtle pl-1"
+        <span v-if="alpha" class="shrink-0 border-l border-border-subtle pl-1"
           >{{ hsva.a }}%</span
         >
       </div>

src/composables/boundingBoxes/boundingBoxesUtil.test.ts

@@ -156,7 +156,7 @@ describe('fromBoundingBoxes', () => {
         y: 200,
         width: 300,
         height: 400,
-        metadata: { type: 'text', text: 'hi', desc: 'd', palette: ['#fff'] }
+        metadata: { type: 'text', text: 'hi', desc: 'd', palette: ['#ffffff'] }
       }
     ]
     expect(fromBoundingBoxes(boxes, 1000, 1000)[0]).toEqual({
@@ -167,10 +167,31 @@ describe('fromBoundingBoxes', () => {
       type: 'text',
       text: 'hi',
       desc: 'd',
-      palette: ['#fff']
+      palette: ['#ffffff']
     })
   })
 
+  it('normalizes palette entries and drops invalid colors', () => {
+    const boxes: BoundingBox[] = [
+      {
+        x: 0,
+        y: 0,
+        width: 10,
+        height: 10,
+        metadata: {
+          type: 'obj',
+          text: '',
+          desc: '',
+          palette: ['#FF0000', '#abc', 'red', '', 123] as unknown as string[]
+        }
+      }
+    ]
+    expect(fromBoundingBoxes(boxes, 100, 100)[0].palette).toEqual([
+      '#ff0000',
+      '#aabbcc'
+    ])
+  })
+
   it('fills defaults when metadata is missing or partial', () => {
     const boxes = [{ x: 0, y: 0, width: 10, height: 10 }] as BoundingBox[]
     expect(fromBoundingBoxes(boxes, 100, 100)[0]).toMatchObject({

src/composables/boundingBoxes/boundingBoxesUtil.ts

@@ -202,6 +202,22 @@ function isBoundingBox(b: unknown): b is BoundingBox {
   )
 }
 
+function normalizeHexColor(color: unknown): string | null {
+  if (typeof color !== 'string') return null
+  const hex = color.trim().toLowerCase()
+  const short = /^#([0-9a-f])([0-9a-f])([0-9a-f])$/.exec(hex)
+  if (short) {
+    return `#${short[1]}${short[1]}${short[2]}${short[2]}${short[3]}${short[3]}`
+  }
+  return /^#([0-9a-f]{6}|[0-9a-f]{8})$/.test(hex) ? hex : null
+}
+
+function normalizePalette(palette: unknown): string[] {
+  return Array.isArray(palette)
+    ? palette.map(normalizeHexColor).filter((c): c is string => c !== null)
+    : []
+}
+
 export function fromBoundingBoxes(
   boxes: readonly BoundingBox[],
   width: number,
@@ -219,9 +235,7 @@ export function fromBoundingBoxes(
       type: meta.type === 'text' ? 'text' : 'obj',
       text: typeof meta.text === 'string' ? meta.text : '',
       desc: typeof meta.desc === 'string' ? meta.desc : '',
-      palette: Array.isArray(meta.palette)
-        ? meta.palette.filter((c): c is string => typeof c === 'string')
-        : []
+      palette: normalizePalette(meta.palette)
     }
   })
 }

src/composables/boundingBoxes/useBoundingBoxes.test.ts

@@ -8,14 +8,32 @@ import { useBoundingBoxes } from './useBoundingBoxes'
 import type { BoundingBox } from '@/types/boundingBoxes'
 import { toNodeId } from '@/types/nodeId'
 
-const { appState } = vi.hoisted(() => ({
-  appState: { node: null as unknown }
+const { appState, outputState } = vi.hoisted(() => ({
+  appState: { node: null as unknown },
+  outputState: {
+    outputs: undefined as unknown,
+    nodeOutputs: null as { value: Record<string, unknown> } | null
+  }
 }))
 
 vi.mock('@/scripts/app', () => ({
   app: { canvas: { graph: { getNodeById: () => appState.node } } }
 }))
 
+vi.mock('@/stores/nodeOutputStore', async () => {
+  const { ref } = await import('vue')
+  const nodeOutputs = ref<Record<string, unknown>>({})
+  outputState.nodeOutputs = nodeOutputs
+  return {
+    useNodeOutputStore: () => ({
+      nodeOutputs,
+      nodePreviewImages: ref({}),
+      getNodeImageUrls: () => undefined,
+      getNodeOutputs: () => outputState.outputs
+    })
+  }
+})
+
 const ctx = {
   measureText: (s: string) => ({ width: s.length * 7 }),
   setTransform: () => {},
@@ -27,6 +45,9 @@ const ctx = {
   save: () => {},
   restore: () => {},
   beginPath: () => {},
+  moveTo: () => {},
+  arc: () => {},
+  fill: () => {},
   rect: () => {},
   clip: () => {},
   font: '',
@@ -58,17 +79,32 @@ function makeCanvas(): HTMLCanvasElement {
   return el
 }
 
-function makeNode() {
+interface MockNode {
+  widgets: { name: string; value: unknown }[]
+  findInputSlot: (name: string) => number
+  getInputNode: () => null
+  isInputConnected?: () => boolean
+}
+
+function makeNode(): MockNode {
   return {
     widgets: [
       { name: 'width', value: 512 },
-      { name: 'height', value: 512 }
+      { name: 'height', value: 512 },
+      { name: 'last_incoming', value: [] }
     ],
     findInputSlot: () => -1,
     getInputNode: () => null
   }
 }
 
+const lastIncomingOf = (node: MockNode) =>
+  node.widgets.find((w) => w.name === 'last_incoming')!.value
+
+const setLastIncomingOf = (node: MockNode, value: BoundingBox[]) => {
+  node.widgets.find((w) => w.name === 'last_incoming')!.value = value
+}
+
 const pe = (
   clientX: number,
   clientY: number,
@@ -96,6 +132,8 @@ interface Captured extends Api {
   modelValue: Ref<BoundingBox[]>
 }
 
+const modelBoxes = (c: Captured) => c.modelValue.value
+
 function setup(initial: BoundingBox[] = []) {
   let captured: Captured | undefined
   const Harness = defineComponent({
@@ -128,9 +166,19 @@ const box = (over: Partial<BoundingBox> = {}): BoundingBox => ({
   ...over
 })
 
+function makeConnectedNode(): MockNode {
+  return {
+    ...makeNode(),
+    findInputSlot: (name: string) => (name === 'bboxes' ? 1 : -1),
+    isInputConnected: () => true
+  }
+}
+
 beforeEach(() => {
   setActivePinia(createPinia())
   appState.node = makeNode()
+  outputState.outputs = undefined
+  if (outputState.nodeOutputs) outputState.nodeOutputs.value = {}
   vi.stubGlobal('requestAnimationFrame', (cb: FrameRequestCallback) => {
     void Promise.resolve().then(() => cb(0))
     return 1
@@ -168,8 +216,8 @@ describe('useBoundingBoxes drawing', () => {
     c.onCanvasPointerMove(pe(60, 60))
     c.onDocPointerUp(pe(60, 60))
     await flush()
-    expect(c.modelValue.value).toHaveLength(1)
-    expect(c.modelValue.value[0].width).toBeGreaterThan(0)
+    expect(modelBoxes(c)).toHaveLength(1)
+    expect(modelBoxes(c)[0].width).toBeGreaterThan(0)
   })
 
   it('discards a zero-size draw', async () => {
@@ -177,7 +225,7 @@ describe('useBoundingBoxes drawing', () => {
     c.onPointerDown(pe(10, 10))
     c.onDocPointerUp(pe(10, 10))
     await flush()
-    expect(c.modelValue.value).toHaveLength(0)
+    expect(modelBoxes(c)).toHaveLength(0)
   })
 
   it('selects an existing region instead of drawing when clicking inside it', async () => {
@@ -185,7 +233,7 @@ describe('useBoundingBoxes drawing', () => {
     c.onPointerDown(pe(30, 30))
     c.onDocPointerUp(pe(30, 30))
     await flush()
-    expect(c.modelValue.value).toHaveLength(1)
+    expect(modelBoxes(c)).toHaveLength(1)
   })
 })
 
@@ -194,7 +242,7 @@ describe('useBoundingBoxes region editing', () => {
     const c = setup([box()])
     c.setActiveType('text')
     await flush()
-    expect(c.modelValue.value[0].metadata.type).toBe('text')
+    expect(modelBoxes(c)[0].metadata.type).toBe('text')
   })
 
   it('deletes the active region on Delete', async () => {
@@ -205,14 +253,18 @@ describe('useBoundingBoxes region editing', () => {
       stopPropagation: () => {}
     } as unknown as KeyboardEvent)
     await flush()
-    expect(c.modelValue.value).toHaveLength(0)
+    expect(modelBoxes(c)).toHaveLength(0)
   })
 
-  it('clears all regions', async () => {
+  it('clears all regions and invalidates the applied upstream input', async () => {
+    const node = makeNode()
+    setLastIncomingOf(node, [box()])
+    appState.node = node
     const c = setup([box(), box({ x: 0 })])
     c.clearAll()
     await flush()
-    expect(c.modelValue.value).toHaveLength(0)
+    expect(modelBoxes(c)).toHaveLength(0)
+    expect(lastIncomingOf(node)).toEqual([])
   })
 })
 
@@ -226,7 +278,7 @@ describe('useBoundingBoxes inline editor', () => {
     c.inlineEditor.value!.value = 'a label'
     c.commitInlineEditor()
     await flush()
-    expect(c.modelValue.value[0].metadata.desc).toBe('a label')
+    expect(modelBoxes(c)[0].metadata.desc).toBe('a label')
     expect(c.inlineEditor.value).toBeNull()
   })
 
@@ -239,6 +291,168 @@ describe('useBoundingBoxes inline editor', () => {
   })
 })
 
+describe('useBoundingBoxes incoming bboxes input', () => {
+  it('adopts cached outputs on mount without overwriting existing edits', () => {
+    const node = makeConnectedNode()
+    appState.node = node
+    const incoming = [box({ x: 0, width: 100 })]
+    outputState.outputs = { input_bboxes: incoming }
+    const c = setup([box({ x: 200, width: 300 })])
+    expect(modelBoxes(c)).toHaveLength(1)
+    expect(modelBoxes(c)[0].width).toBe(300)
+    expect(lastIncomingOf(node)).toEqual(incoming)
+  })
+
+  it('does not re-apply an already applied output after a remount', async () => {
+    const node = makeConnectedNode()
+    const incoming = [box({ x: 0, width: 100 })]
+    setLastIncomingOf(node, incoming)
+    appState.node = node
+    outputState.outputs = { input_bboxes: incoming }
+    const c = setup([box({ x: 200, width: 300 })])
+    outputState.nodeOutputs!.value = { updated: true }
+    await flush()
+    expect(modelBoxes(c)[0].width).toBe(300)
+  })
+
+  it('ignores incoming output when the input is not connected', () => {
+    outputState.outputs = { input_bboxes: [box({ x: 0, width: 100 })] }
+    const c = setup([])
+    expect(modelBoxes(c)).toHaveLength(0)
+  })
+
+  it('repopulates from the next run after clearing the canvas', async () => {
+    appState.node = makeConnectedNode()
+    const c = setup([])
+
+    outputState.outputs = { input_bboxes: [box({ x: 0, width: 100 })] }
+    outputState.nodeOutputs!.value = { n: 1 }
+    await flush()
+    expect(modelBoxes(c)).toHaveLength(1)
+
+    c.clearAll()
+    await flush()
+    expect(modelBoxes(c)).toHaveLength(0)
+
+    outputState.nodeOutputs!.value = { n: 2 }
+    await flush()
+    expect(modelBoxes(c)).toHaveLength(1)
+    expect(modelBoxes(c)[0].width).toBe(100)
+  })
+
+  it('does not apply output updates while the input is disconnected', async () => {
+    let connected = true
+    appState.node = {
+      ...makeConnectedNode(),
+      isInputConnected: () => connected
+    }
+    const c = setup([])
+
+    outputState.outputs = { input_bboxes: [box({ x: 0, width: 100 })] }
+    outputState.nodeOutputs!.value = { n: 1 }
+    await flush()
+    expect(modelBoxes(c)).toHaveLength(1)
+
+    c.clearAll()
+    await flush()
+    connected = false
+    outputState.nodeOutputs!.value = { n: 2 }
+    await flush()
+    expect(modelBoxes(c)).toHaveLength(0)
+  })
+
+  it('does not apply incoming boxes while the user is drawing', async () => {
+    appState.node = makeConnectedNode()
+    const c = setup([])
+    c.grid.value = false
+    c.onPointerDown(pe(10, 10))
+    c.onCanvasPointerMove(pe(50, 50))
+
+    outputState.outputs = {
+      input_bboxes: [box({ x: 0, width: 100, height: 100 })]
+    }
+    outputState.nodeOutputs!.value = { n: 1 }
+    await flush()
+
+    c.onDocPointerUp(pe(50, 50))
+    await flush()
+    expect(modelBoxes(c)).toHaveLength(1)
+    expect(modelBoxes(c)[0].width).toBe(205)
+  })
+
+  it('applies incoming boxes when outputs stream in after mount', async () => {
+    const node = makeConnectedNode()
+    appState.node = node
+    const c = setup([])
+    expect(modelBoxes(c)).toHaveLength(0)
+
+    const incoming = [box({ x: 0, width: 100 })]
+    outputState.outputs = { input_bboxes: incoming }
+    outputState.nodeOutputs!.value = { updated: true }
+    await flush()
+
+    expect(modelBoxes(c)).toHaveLength(1)
+    expect(modelBoxes(c)[0].width).toBe(100)
+    expect(lastIncomingOf(node)).toEqual(incoming)
+  })
+
+  it('re-seeds the canvas over user edits when the upstream value changes', async () => {
+    const node = makeConnectedNode()
+    setLastIncomingOf(node, [box({ x: 0, width: 100 })])
+    appState.node = node
+    const c = setup([box({ x: 200, width: 300 })])
+
+    const changed = [box({ x: 64, width: 128 })]
+    outputState.outputs = { input_bboxes: changed }
+    outputState.nodeOutputs!.value = { n: 1 }
+    await flush()
+
+    expect(modelBoxes(c)[0].width).toBe(128)
+    expect(lastIncomingOf(node)).toEqual(changed)
+  })
+})
+
+describe('useBoundingBoxes grid snapping', () => {
+  it('snaps a drawn box to the grid when grid is enabled (default)', async () => {
+    const c = setup()
+    c.onPointerDown(pe(10, 10))
+    c.onCanvasPointerMove(pe(60, 60))
+    c.onDocPointerUp(pe(60, 60))
+    await flush()
+    expect(modelBoxes(c)).toHaveLength(1)
+    expect(modelBoxes(c)[0].x).toBe(64)
+    expect(modelBoxes(c)[0].width).toBe(256)
+  })
+
+  it('does not snap when grid is disabled', async () => {
+    const c = setup()
+    c.grid.value = false
+    c.onPointerDown(pe(10, 10))
+    c.onCanvasPointerMove(pe(55, 55))
+    c.onDocPointerUp(pe(55, 55))
+    await flush()
+    expect(modelBoxes(c)[0].width).toBe(230)
+  })
+
+  it('keeps the anchored edge fixed when resizing a single edge', async () => {
+    const c = setup([box({ x: 51, y: 51, width: 256, height: 256 })])
+    c.onPointerDown(pe(60, 30))
+    c.onCanvasPointerMove(pe(80, 30))
+    c.onDocPointerUp(pe(80, 30))
+    await flush()
+    expect(modelBoxes(c)[0].x).toBe(51)
+  })
+
+  it('removes a box that a resize collapses to zero size', async () => {
+    const c = setup([box({ x: 64, y: 64, width: 128, height: 128 })])
+    c.onPointerDown(pe(37, 25))
+    c.onCanvasPointerMove(pe(14, 25))
+    c.onDocPointerUp(pe(14, 25))
+    await flush()
+    expect(modelBoxes(c)).toHaveLength(0)
+  })
+})
+
 describe('useBoundingBoxes hover cursor', () => {
   it('switches to a pointer cursor over a tag', async () => {
     const c = setup([box({ x: 10, y: 10, width: 256, height: 256 })])

src/composables/boundingBoxes/useBoundingBoxes.ts

@@ -1,4 +1,5 @@
 import { useElementSize } from '@vueuse/core'
+import { cloneDeep, isEqual } from 'es-toolkit'
 import { storeToRefs } from 'pinia'
 import type { Ref, ShallowRef } from 'vue'
 import { computed, nextTick, onBeforeUnmount, ref, watch } from 'vue'
@@ -15,6 +16,7 @@ import type {
   Region
 } from '@/composables/boundingBoxes/boundingBoxesUtil'
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
+import type { NodeOutputWith } from '@/schemas/apiSchema'
 import { app } from '@/scripts/app'
 import { useNodeOutputStore } from '@/stores/nodeOutputStore'
 import type { BoundingBox } from '@/types/boundingBoxes'
@@ -25,6 +27,10 @@ const HANDLE_PX = 8
 const DIMENSION_STEP = 16
 const BG_DIM = 0.75
 const MAX_ELEMENT_COLORS = 5
+const GRID_PX = 32
+const MAX_GRID_CELLS = 64
+const DOT_ALPHA = 0.18
+const DOT_RADIUS = 1
 
 interface InlineEditorState {
   value: string
@@ -57,6 +63,7 @@ export function useBoundingBoxes(
   const hoverTagIndex = ref<number | null>(null)
   const bgImage = ref<HTMLImageElement | null>(null)
   const inlineEditor = ref<InlineEditorState | null>(null)
+  const grid = ref(true)
 
   const { width: containerWidth } = useElementSize(canvasContainer)
 
@@ -96,6 +103,89 @@ export function useBoundingBoxes(
     return Math.max(0, Math.min(1, n))
   }
 
+  function gridSpec() {
+    const axisFraction = (size: number) =>
+      Math.max(GRID_PX, Math.ceil(size / MAX_GRID_CELLS)) / size
+    return {
+      fx: axisFraction(widthValue.value),
+      fy: axisFraction(heightValue.value)
+    }
+  }
+
+  function snapFraction(value: number, step: number) {
+    return step > 0 ? clampToCanvas(Math.round(value / step) * step) : value
+  }
+
+  function snapRegion(region: Region, mode: HitMode): Region {
+    if (!grid.value) return region
+    const { fx, fy } = gridSpec()
+    if (mode === 'move') {
+      return {
+        ...region,
+        x: Math.min(snapFraction(region.x, fx), 1 - region.w),
+        y: Math.min(snapFraction(region.y, fy), 1 - region.h)
+      }
+    }
+    const snapLeft =
+      mode === 'draw' ||
+      mode === 'resize-l' ||
+      mode === 'resize-tl' ||
+      mode === 'resize-bl'
+    const snapRight =
+      mode === 'draw' ||
+      mode === 'resize-r' ||
+      mode === 'resize-tr' ||
+      mode === 'resize-br'
+    const snapTop =
+      mode === 'draw' ||
+      mode === 'resize-t' ||
+      mode === 'resize-tl' ||
+      mode === 'resize-tr'
+    const snapBottom =
+      mode === 'draw' ||
+      mode === 'resize-b' ||
+      mode === 'resize-bl' ||
+      mode === 'resize-br'
+    const x1 = snapLeft ? snapFraction(region.x, fx) : region.x
+    const y1 = snapTop ? snapFraction(region.y, fy) : region.y
+    const x2 = snapRight
+      ? snapFraction(region.x + region.w, fx)
+      : region.x + region.w
+    const y2 = snapBottom
+      ? snapFraction(region.y + region.h, fy)
+      : region.y + region.h
+    return {
+      ...region,
+      x: x1,
+      y: y1,
+      w: Math.max(0, x2 - x1),
+      h: Math.max(0, y2 - y1)
+    }
+  }
+
+  function drawDots(ctx: CanvasRenderingContext2D, W: number, H: number) {
+    const el = canvasEl.value
+    if (!el) return
+    const { fx, fy } = gridSpec()
+    if (fx <= 0 || fy <= 0) return
+    const cols = Math.round(1 / fx)
+    const rows = Math.round(1 / fy)
+    ctx.save()
+    ctx.globalAlpha = DOT_ALPHA
+    ctx.fillStyle = getComputedStyle(el).color
+    ctx.beginPath()
+    for (let i = 0; i <= cols; i++) {
+      const cx = Math.min(1, i * fx) * W
+      for (let j = 0; j <= rows; j++) {
+        const cy = Math.min(1, j * fy) * H
+        ctx.moveTo(cx + DOT_RADIUS, cy)
+        ctx.arc(cx, cy, DOT_RADIUS, 0, Math.PI * 2)
+      }
+    }
+    ctx.fill()
+    ctx.restore()
+  }
+
   function logicalSize() {
     const el = canvasEl.value
     return { w: el?.clientWidth || 1, h: el?.clientHeight || 1 }
@@ -146,6 +236,8 @@ export function useBoundingBoxes(
       ctx.fillRect(0, 0, W, H)
     }
 
+    if (grid.value) drawDots(ctx, W, H)
+
     const showActive = focused.value || isNodeSelected.value
     const aIdx = showActive ? activeIndex.value : -1
     const order = state.value.regions
@@ -366,7 +458,7 @@ export function useBoundingBoxes(
     const dx = mN.x - dragStartNorm.value.x
     const dy = mN.y - dragStartNorm.value.y
     const nb = applyDrag(dragMode.value, boxAtStart.value, dx, dy)
-    state.value.regions[activeIndex.value] = nb
+    state.value.regions[activeIndex.value] = snapRegion(nb, dragMode.value)
     requestDraw()
   }
 
@@ -375,7 +467,7 @@ export function useBoundingBoxes(
     drawing.value = false
     canvasEl.value?.releasePointerCapture?.(e.pointerId)
     const b = state.value.regions[activeIndex.value]
-    if (b && (b.w < 0.005 || b.h < 0.005) && dragMode.value === 'draw') {
+    if (b && (b.w < 0.005 || b.h < 0.005)) {
       removeRegion(activeIndex.value)
     }
     syncState()
@@ -510,6 +602,7 @@ export function useBoundingBoxes(
   function clearAll() {
     state.value.regions = []
     activeIndex.value = -1
+    setLastIncoming([])
     syncState()
   }
 
@@ -530,6 +623,23 @@ export function useBoundingBoxes(
   watch(isNodeSelected, () => requestDraw())
   watch([widthValue, heightValue], () => syncState())
 
+  watch(
+    litegraphNode,
+    (node) => {
+      const props = node?.properties as { bboxGrid?: unknown } | undefined
+      if (props && typeof props.bboxGrid === 'boolean')
+        grid.value = props.bboxGrid
+    },
+    { immediate: true }
+  )
+  watch(grid, (enabled) => {
+    const props = litegraphNode.value?.properties as
+      | Record<string, unknown>
+      | undefined
+    if (props) props.bboxGrid = enabled
+    requestDraw()
+  })
+
   const nodeOutputStore = useNodeOutputStore()
   function applyImageDimensions(naturalWidth: number, naturalHeight: number) {
     const node = litegraphNode.value
@@ -580,10 +690,63 @@ export function useBoundingBoxes(
     }
     img.src = url
   }
-  watch(() => nodeOutputStore.nodeOutputs, updateBgImage, { deep: true })
+  function lastIncomingWidget() {
+    return litegraphNode.value?.widgets?.find((w) => w.name === 'last_incoming')
+  }
+
+  function lastIncomingValue(): BoundingBox[] {
+    const value = lastIncomingWidget()?.value
+    return Array.isArray(value) ? (value as BoundingBox[]) : []
+  }
+
+  function setLastIncoming(boxes: BoundingBox[]) {
+    const widget = lastIncomingWidget()
+    if (!widget) return
+    const next = cloneDeep(boxes)
+    widget.value = next
+    widget.callback?.(next)
+  }
+
+  function applyIncomingBoxes(apply = true) {
+    if (drawing.value) return
+    const node = litegraphNode.value
+    if (!node) return
+    const slot = node.findInputSlot('bboxes')
+    if (slot < 0 || !node.isInputConnected(slot)) return
+    const outputs = nodeOutputStore.getNodeOutputs(node) as
+      | NodeOutputWith<{ input_bboxes?: BoundingBox[] }>
+      | undefined
+    const incoming = outputs?.input_bboxes
+    if (!incoming?.length) return
+    const applied = lastIncomingValue()
+    if (isEqual(incoming, applied)) return
+    if (!apply) {
+      if (!applied.length && state.value.regions.length)
+        setLastIncoming(incoming)
+      return
+    }
+    state.value.regions = fromBoundingBoxes(
+      incoming,
+      widthValue.value,
+      heightValue.value
+    )
+    activeIndex.value = state.value.regions.length ? 0 : -1
+    setLastIncoming(incoming)
+    syncState()
+  }
+
+  watch(
+    () => nodeOutputStore.nodeOutputs,
+    () => {
+      updateBgImage()
+      applyIncomingBoxes()
+    },
+    { deep: true }
+  )
   watch(() => nodeOutputStore.nodePreviewImages, updateBgImage, { deep: true })
 
   updateBgImage()
+  applyIncomingBoxes(false)
   void nextTick(() => requestDraw())
 
   onBeforeUnmount(() => {
@@ -608,6 +771,7 @@ export function useBoundingBoxes(
     commitInlineEditor,
     setActiveType,
     clearAll,
-    syncState
+    syncState,
+    grid
   }
 }

src/composables/palette/usePaletteSwatchRow.test.ts

@@ -1,4 +1,4 @@
-import { afterEach, describe, expect, it, vi } from 'vitest'
+import { afterEach, describe, expect, it } from 'vitest'
 import type { EffectScope } from 'vue'
 import { effectScope, ref, shallowRef } from 'vue'
 
@@ -13,17 +13,12 @@ afterEach(() => {
 function setup(initial: string[]) {
   const modelValue = ref(initial)
   const container = shallowRef(document.createElement('div'))
-  const picker = shallowRef(document.createElement('input'))
   const scope = effectScope()
   scopes.push(scope)
-  const api = scope.run(() =>
-    usePaletteSwatchRow({ modelValue, container, picker })
-  )!
-  return { modelValue, container, picker, ...api }
+  const api = scope.run(() => usePaletteSwatchRow({ modelValue, container }))!
+  return { modelValue, container, ...api }
 }
 
-const mouseEvent = () => ({ stopPropagation: vi.fn() }) as unknown as MouseEvent
-
 describe('usePaletteSwatchRow', () => {
   it('appends a default color', () => {
     const { modelValue, addColor } = setup(['#000000'])
@@ -37,31 +32,17 @@ describe('usePaletteSwatchRow', () => {
     expect(modelValue.value).toEqual(['#a', '#c'])
   })
 
-  it('seeds the picker input with the clicked color before opening it', () => {
-    const { picker, openPicker } = setup(['#112233'])
-    const click = vi.spyOn(picker.value!, 'click')
-    openPicker(0, mouseEvent())
-    expect(picker.value!.value).toBe('#112233')
-    expect(click).toHaveBeenCalled()
-  })
-
-  it('falls back to white when the slot is empty', () => {
-    const { picker, openPicker } = setup([''])
-    openPicker(0, mouseEvent())
-    expect(picker.value!.value).toBe('#ffffff')
-  })
-
-  it('writes the picked color back to the open slot', () => {
-    const { modelValue, openPicker, onPickerInput } = setup(['#a', '#b'])
-    openPicker(1, mouseEvent())
-    onPickerInput({ target: { value: '#123456' } } as unknown as Event)
+  it('updates the color at an index', () => {
+    const { modelValue, updateAt } = setup(['#a', '#b'])
+    updateAt(1, '#123456')
     expect(modelValue.value).toEqual(['#a', '#123456'])
   })
 
-  it('ignores picker input when no slot is open', () => {
-    const { modelValue, onPickerInput } = setup(['#a'])
-    onPickerInput({ target: { value: '#123456' } } as unknown as Event)
-    expect(modelValue.value).toEqual(['#a'])
+  it('ignores an update that does not change the color', () => {
+    const { modelValue, updateAt } = setup(['#a'])
+    const before = modelValue.value
+    updateAt(0, '#a')
+    expect(modelValue.value).toBe(before)
   })
 
   it('reorders via drag when the pointer crosses another swatch', () => {

src/composables/palette/usePaletteSwatchRow.ts

@@ -5,30 +5,16 @@ import { ref } from 'vue'
 interface UsePaletteSwatchRowOptions {
   modelValue: Ref<string[]>
   container: Readonly<ShallowRef<HTMLDivElement | null>>
-  picker: Readonly<ShallowRef<HTMLInputElement | null>>
 }
 
 export function usePaletteSwatchRow({
   modelValue,
-  container,
-  picker
+  container
 }: UsePaletteSwatchRowOptions) {
-  const pickerIndex = ref<number | null>(null)
-
-  function openPicker(i: number, e: MouseEvent) {
-    e.stopPropagation()
-    pickerIndex.value = i
-    const el = picker.value
-    if (!el) return
-    el.value = modelValue.value[i] || '#ffffff'
-    el.click()
-  }
-
-  function onPickerInput(e: Event) {
-    const v = (e.target as HTMLInputElement).value
-    if (pickerIndex.value === null) return
+  function updateAt(i: number, value: string) {
+    if (modelValue.value[i] === value) return
     const next = modelValue.value.slice()
-    next[pickerIndex.value] = v
+    next[i] = value
     modelValue.value = next
   }
 
@@ -105,8 +91,7 @@ export function usePaletteSwatchRow({
   })
 
   return {
-    openPicker,
-    onPickerInput,
+    updateAt,
     remove,
     addColor,
     onPointerDown

src/composables/useLoad3d.test.ts

@@ -77,6 +77,14 @@ vi.mock('pinia', async (importOriginal) => {
   }
 })
 
+const { settingGetMock } = vi.hoisted(() => ({
+  settingGetMock: vi.fn()
+}))
+
+vi.mock('@/platform/settings/settingStore', () => ({
+  useSettingStore: () => ({ get: settingGetMock })
+}))
+
 vi.mock('@/renderer/core/canvas/canvasStore', () => ({
   useCanvasStore: vi.fn()
 }))
@@ -95,6 +103,9 @@ describe('useLoad3d', () => {
     vi.clearAllMocks()
     nodeToLoad3dMap.clear()
     vi.mocked(getActivePinia).mockReturnValue(null as unknown as Pinia)
+    settingGetMock.mockImplementation((key: string) =>
+      key === 'Comfy.Load3D.BackgroundColor' ? '282828' : undefined
+    )
 
     mockNode = createMockLGraphNode({
       properties: {
@@ -356,6 +367,20 @@ describe('useLoad3d', () => {
       expect(composable.isPreview.value).toBe(true)
     })
 
+    it('should set preview mode for save-viewer nodes despite width/height widgets', async () => {
+      Object.defineProperty(mockNode, 'constructor', {
+        value: { comfyClass: 'Save3DAdvanced' },
+        configurable: true
+      })
+
+      const composable = useLoad3d(mockNode)
+      const containerRef = document.createElement('div')
+
+      await composable.initializeLoad3d(containerRef)
+
+      expect(composable.isPreview.value).toBe(true)
+    })
+
     it('should handle initialization errors', async () => {
       vi.mocked(createLoad3d).mockImplementationOnce(() => {
         throw new Error('Load3d creation failed')
@@ -383,7 +408,37 @@ describe('useLoad3d', () => {
       const nodeRef = shallowRef<LGraphNode | null>(mockNode)
       const composable = useLoad3d(nodeRef)
 
-      expect(composable.sceneConfig.value.backgroundColor).toBe('#000000')
+      expect(composable.sceneConfig.value.backgroundColor).toBe('#282828')
+    })
+
+    it('defaults background color from the Comfy.Load3D.BackgroundColor setting', () => {
+      vi.mocked(getActivePinia).mockReturnValue({} as unknown as Pinia)
+      vi.mocked(useCanvasStore).mockReturnValue(
+        reactive({ appScalePercentage: 100 }) as unknown as ReturnType<
+          typeof useCanvasStore
+        >
+      )
+      settingGetMock.mockImplementation((key: string) =>
+        key === 'Comfy.Load3D.BackgroundColor' ? '123456' : undefined
+      )
+
+      const composable = useLoad3d(mockNode)
+
+      expect(composable.sceneConfig.value.backgroundColor).toBe('#123456')
+    })
+
+    it('attaches event listeners before running queued ready callbacks', async () => {
+      const composable = useLoad3d(mockNode)
+      let listenersAttachedWhenCallbackRan = false
+
+      composable.waitForLoad3d(() => {
+        listenersAttachedWhenCallbackRan =
+          vi.mocked(mockLoad3d.addEventListener!).mock.calls.length > 0
+      })
+
+      await composable.initializeLoad3d(document.createElement('div'))
+
+      expect(listenersAttachedWhenCallbackRan).toBe(true)
     })
 
     it('passes getZoomScale callback to createLoad3d', async () => {

src/composables/useLoad3d.ts

@@ -8,6 +8,7 @@ import { useChainCallback } from '@/composables/functional/useChainCallback'
 import type Load3d from '@/extensions/core/load3d/Load3d'
 import Load3dUtils from '@/extensions/core/load3d/Load3dUtils'
 import { createLoad3d } from '@/extensions/core/load3d/createLoad3d'
+import { isLoad3dResultViewerNode } from '@/extensions/core/load3d/nodeTypes'
 import {
   isAssetPreviewSupported,
   persistThumbnail
@@ -118,7 +119,9 @@ export const useLoad3d = (nodeOrRef: MaybeRef<LGraphNode | null>) => {
 
   const sceneConfig = ref<SceneConfig>({
     showGrid: true,
-    backgroundColor: '#000000',
+    backgroundColor: getActivePinia()
+      ? '#' + useSettingStore().get('Comfy.Load3D.BackgroundColor')
+      : '#282828',
     backgroundImage: '',
     backgroundRenderMode: 'tiled'
   })
@@ -192,6 +195,7 @@ export const useLoad3d = (nodeOrRef: MaybeRef<LGraphNode | null>) => {
       const heightWidget = node.widgets?.find((w) => w.name === 'height')
 
       if (
+        isLoad3dResultViewerNode(node.constructor.comfyClass ?? '') ||
         node.constructor.comfyClass?.startsWith('Preview') ||
         !(widthWidget && heightWidget)
       ) {
@@ -248,6 +252,8 @@ export const useLoad3d = (nodeOrRef: MaybeRef<LGraphNode | null>) => {
 
       nodeToLoad3dMap.set(node, load3d)
 
+      handleEvents('add')
+
       const callbacks = pendingCallbacks.get(node)
 
       if (callbacks && load3d) {
@@ -263,8 +269,6 @@ export const useLoad3d = (nodeOrRef: MaybeRef<LGraphNode | null>) => {
           if (load3d) invokeReadyCallback(callback, load3d)
         })
       }
-
-      handleEvents('add')
     } catch (error) {
       console.error('Error initializing Load3d:', error)
       useToastStore().addAlert(

src/composables/useLoad3dViewer.ts

@@ -4,7 +4,7 @@ import QuickLRU from '@alloc/quick-lru'
 import type Load3d from '@/extensions/core/load3d/Load3d'
 import Load3dUtils from '@/extensions/core/load3d/Load3dUtils'
 import { createLoad3d } from '@/extensions/core/load3d/createLoad3d'
-import { isLoad3dPreviewNode } from '@/extensions/core/load3d/nodeTypes'
+import { isLoad3dResultViewerNode } from '@/extensions/core/load3d/nodeTypes'
 import type {
   AnimationItem,
   BackgroundRenderModeType,
@@ -371,7 +371,7 @@ export const useLoad3dViewer = (node?: LGraphNode) => {
         | LightConfig
         | undefined
 
-      isPreview.value = isLoad3dPreviewNode(node.type ?? '')
+      isPreview.value = isLoad3dResultViewerNode(node.type ?? '')
 
       if (sceneConfig) {
         backgroundColor.value =

src/extensions/core/createBoundingBoxes.test.ts

@@ -32,7 +32,8 @@ function makeNode(connected: boolean, comfyClass = 'CreateBoundingBoxes') {
   const widgets: MockWidget[] = [
     { name: 'width', hidden: false, options: {} },
     { name: 'height', hidden: false, options: {} },
-    { name: 'other', hidden: false, options: {} }
+    { name: 'other', hidden: false, options: {} },
+    { name: 'last_incoming', hidden: false, options: {} }
   ]
   return {
     constructor: { comfyClass },
@@ -73,6 +74,15 @@ describe('Comfy.CreateBoundingBoxes extension', () => {
     expect(node.widgets[0].options.hidden).toBe(false)
   })
 
+  it('always hides the internal last_incoming widget', () => {
+    for (const connected of [true, false]) {
+      const node = makeNode(connected)
+      state.extension!.nodeCreated(node)
+      expect(node.widgets[3].hidden).toBe(true)
+      expect(node.widgets[3].options.hidden).toBe(true)
+    }
+  })
+
   it('writes visibility through the widget value store when present', () => {
     state.widgetState = { options: {} }
     const node = makeNode(true)

src/extensions/core/createBoundingBoxes.ts

@@ -3,6 +3,7 @@ import { useExtensionService } from '@/services/extensionService'
 import { useWidgetValueStore } from '@/stores/widgetValueStore'
 
 const DIMENSION_WIDGETS = new Set(['width', 'height'])
+const INTERNAL_WIDGETS = new Set(['last_incoming'])
 
 useExtensionService().registerExtension({
   name: 'Comfy.CreateBoundingBoxes',
@@ -15,20 +16,30 @@ useExtensionService().registerExtension({
 
     const widgetValueStore = useWidgetValueStore()
 
+    const setWidgetHidden = (
+      widget: NonNullable<typeof node.widgets>[number],
+      hidden: boolean
+    ) => {
+      widget.hidden = hidden
+      const state = widget.widgetId
+        ? widgetValueStore.getWidget(widget.widgetId)
+        : undefined
+      if (state?.options) state.options.hidden = hidden
+      else widget.options.hidden = hidden
+    }
+
     const syncDimensionVisibility = () => {
       const slot = node.findInputSlot('background')
       const hidden = slot >= 0 && node.isInputConnected(slot)
       for (const widget of node.widgets ?? []) {
-        if (!DIMENSION_WIDGETS.has(widget.name)) continue
-        widget.hidden = hidden
-        const state = widget.widgetId
-          ? widgetValueStore.getWidget(widget.widgetId)
-          : undefined
-        if (state?.options) state.options.hidden = hidden
-        else widget.options.hidden = hidden
+        if (DIMENSION_WIDGETS.has(widget.name)) setWidgetHidden(widget, hidden)
       }
     }
 
+    for (const widget of node.widgets ?? []) {
+      if (INTERNAL_WIDGETS.has(widget.name)) setWidgetHidden(widget, true)
+    }
+
     syncDimensionVisibility()
     node.onConnectionsChange = useChainCallback(
       node.onConnectionsChange,

src/extensions/core/load3d.test.ts

@@ -143,14 +143,23 @@ async function loadExtensionsFresh(): Promise<{
   load3DExt: ExtCreated
   preview3DExt: ExtCreated
   preview3DAdvancedExt: ExtCreated
+  save3DAdvancedExt: ExtCreated
 }> {
   vi.resetModules()
   registerExtensionMock.mockClear()
   await import('@/extensions/core/load3d')
+  const extByName = (name: string): ExtCreated => {
+    const call = registerExtensionMock.mock.calls.find(
+      (c) => (c[0] as ExtCreated).name === name
+    )
+    if (!call) throw new Error(`Extension ${name} was not registered`)
+    return call[0] as ExtCreated
+  }
   return {
-    load3DExt: registerExtensionMock.mock.calls[0][0] as ExtCreated,
-    preview3DExt: registerExtensionMock.mock.calls[1][0] as ExtCreated,
-    preview3DAdvancedExt: registerExtensionMock.mock.calls[2][0] as ExtCreated
+    load3DExt: extByName('Comfy.Load3D'),
+    preview3DExt: extByName('Comfy.Preview3D'),
+    preview3DAdvancedExt: extByName('Comfy.Preview3DAdvanced'),
+    save3DAdvancedExt: extByName('Comfy.Save3DAdvanced')
   }
 }
 
@@ -264,14 +273,15 @@ function setupBaseMocks() {
 describe('load3d module registration', () => {
   beforeEach(setupBaseMocks)
 
-  it('registers Comfy.Load3D, Comfy.Preview3D, and Comfy.Preview3DAdvanced extensions on import', async () => {
-    const { load3DExt, preview3DExt, preview3DAdvancedExt } =
+  it('registers Comfy.Load3D, Comfy.Preview3D, Comfy.Preview3DAdvanced, and Comfy.Save3DAdvanced extensions on import', async () => {
+    const { load3DExt, preview3DExt, preview3DAdvancedExt, save3DAdvancedExt } =
       await loadExtensionsFresh()
 
-    expect(registerExtensionMock).toHaveBeenCalledTimes(3)
+    expect(registerExtensionMock).toHaveBeenCalledTimes(4)
     expect(load3DExt.name).toBe('Comfy.Load3D')
     expect(preview3DExt.name).toBe('Comfy.Preview3D')
     expect(preview3DAdvancedExt.name).toBe('Comfy.Preview3DAdvanced')
+    expect(save3DAdvancedExt.name).toBe('Comfy.Save3DAdvanced')
   })
 })
 
@@ -711,6 +721,39 @@ describe('Comfy.Preview3D.onNodeOutputsUpdated', () => {
   })
 })
 
+describe('Comfy.Save3DAdvanced.onNodeOutputsUpdated', () => {
+  beforeEach(setupBaseMocks)
+
+  it('restores the saved model from the output folder when opened from history', async () => {
+    const { save3DAdvancedExt } = await loadExtensionsFresh()
+    const node = makePreview3DAdvancedNode({ comfyClass: 'Save3DAdvanced' })
+    getNodeByLocatorIdMock.mockReturnValue(node)
+
+    save3DAdvancedExt.onNodeOutputsUpdated!({
+      '7': { result: ['3d\\ComfyUI_00001.glb'] }
+    } as never)
+
+    expect(node.properties['Last Time Model File']).toBe('3d/ComfyUI_00001.glb')
+    expect(configureForSaveMeshMock).toHaveBeenCalledWith(
+      'output',
+      '3d/ComfyUI_00001.glb',
+      expect.objectContaining({ silentOnNotFound: true })
+    )
+  })
+
+  it('skips nodes whose comfyClass is not Save3DAdvanced', async () => {
+    const { save3DAdvancedExt } = await loadExtensionsFresh()
+    const node = makePreview3DAdvancedNode({ comfyClass: 'Preview3DAdvanced' })
+    getNodeByLocatorIdMock.mockReturnValue(node)
+
+    save3DAdvancedExt.onNodeOutputsUpdated!({
+      '7': { result: ['mesh.glb'] }
+    } as never)
+
+    expect(configureForSaveMeshMock).not.toHaveBeenCalled()
+  })
+})
+
 describe('Comfy.Preview3DAdvanced.nodeCreated', () => {
   beforeEach(setupBaseMocks)
 
@@ -1032,6 +1075,50 @@ describe('Comfy.Preview3DAdvanced.getNodeMenuItems', () => {
   })
 })
 
+describe('Comfy.Save3DAdvanced.nodeCreated', () => {
+  beforeEach(setupBaseMocks)
+
+  it('skips nodes whose comfyClass is not Save3DAdvanced', async () => {
+    const { save3DAdvancedExt } = await loadExtensionsFresh()
+    const node = makePreview3DAdvancedNode({ comfyClass: 'Preview3DAdvanced' })
+
+    await save3DAdvancedExt.nodeCreated(node)
+
+    expect(waitForLoad3dMock).not.toHaveBeenCalled()
+    expect(configureForSaveMeshMock).not.toHaveBeenCalled()
+  })
+
+  it('restores persisted models from the output folder, not temp', async () => {
+    const { save3DAdvancedExt } = await loadExtensionsFresh()
+    const node = makePreview3DAdvancedNode({
+      comfyClass: 'Save3DAdvanced',
+      properties: { 'Last Time Model File': '3d/ComfyUI_00001_.glb' }
+    })
+
+    await save3DAdvancedExt.nodeCreated(node)
+
+    expect(configureForSaveMeshMock).toHaveBeenCalledWith(
+      'output',
+      '3d/ComfyUI_00001_.glb',
+      { silentOnNotFound: true }
+    )
+  })
+
+  it('onExecuted loads the saved file from the output folder', async () => {
+    const { save3DAdvancedExt } = await loadExtensionsFresh()
+    const node = makePreview3DAdvancedNode({ comfyClass: 'Save3DAdvanced' })
+
+    await save3DAdvancedExt.nodeCreated(node)
+    node.onExecuted!({ result: ['3d/ComfyUI_00002_.glb'] })
+
+    expect(configureForSaveMeshMock).toHaveBeenCalledWith(
+      'output',
+      '3d/ComfyUI_00002_.glb',
+      { silentOnNotFound: true }
+    )
+  })
+})
+
 describe('Comfy.Load3D scene widget serializeValue caching', () => {
   beforeEach(setupBaseMocks)
 

src/extensions/core/load3d.ts

@@ -15,8 +15,10 @@ import { createExportMenuItems } from '@/extensions/core/load3d/exportMenuHelper
 import type {
   CameraConfig,
   CameraState,
+  LoadFolder,
   Model3DInfo
 } from '@/extensions/core/load3d/interfaces'
+import type Load3d from '@/extensions/core/load3d/Load3d'
 import Load3DConfiguration from '@/extensions/core/load3d/Load3DConfiguration'
 import {
   LOAD3D_NONE_MODEL,
@@ -48,6 +50,7 @@ import { ComponentWidgetImpl, addWidget } from '@/scripts/domWidget'
 import { useExtensionService } from '@/services/extensionService'
 import { useLoad3dService } from '@/services/load3dService'
 import { useDialogStore } from '@/stores/dialogStore'
+import type { ComfyExtension } from '@/types/comfy'
 import { isLoad3dNode } from '@/utils/litegraphUtil'
 
 const inputSpecLoad3D: CustomInputSpec = {
@@ -287,8 +290,11 @@ useExtensionService().registerExtension({
   getCustomWidgets() {
     const VIEWPORT_STATE_NODES = new Set([
       'Preview3DAdvanced',
+      'Save3DAdvanced',
       'PreviewGaussianSplat',
-      'PreviewPointCloud'
+      'PreviewPointCloud',
+      'SaveGaussianSplat',
+      'SavePointCloud'
     ])
     return {
       LOAD_3D(node) {
@@ -679,155 +685,215 @@ useExtensionService().registerExtension({
   }
 })
 
-useExtensionService().registerExtension({
-  name: 'Comfy.Preview3DAdvanced',
+function applyPreview3DAdvancedResult(
+  node: LGraphNode,
+  load3d: Load3d,
+  result: NonNullable<Preview3DAdvancedOutput['result']>,
+  loadFolder: LoadFolder,
+  comfyClass: string
+): void {
+  const filePath = result[0]
+  if (!filePath) return
 
-  getNodeMenuItems(node: LGraphNode): (IContextMenuValue | null)[] {
-    if (node.constructor.comfyClass !== 'Preview3DAdvanced') return []
+  const normalizedPath = filePath.replaceAll('\\', '/')
+  node.properties['Last Time Model File'] = normalizedPath
 
-    const load3d = useLoad3dService().getLoad3d(node)
-    if (!load3d) return []
+  const config = new Load3DConfiguration(load3d, node.properties)
+  config.configureForSaveMesh(loadFolder, normalizedPath, {
+    silentOnNotFound: true
+  })
 
-    if (load3d.isSplatModel()) return []
+  const cameraState = result[1]
+  const modelTransform = result[2]?.[0]
+  if (!cameraState && !modelTransform) return
 
-    return createExportMenuItems(load3d)
-  },
+  const targetGeneration = load3d.currentLoadGeneration
+  void load3d
+    .whenLoadIdle()
+    .then(() => {
+      if (load3d.currentLoadGeneration !== targetGeneration) return
+      if (cameraState) load3d.setCameraState(cameraState)
+      if (modelTransform) load3d.applyModelTransform(modelTransform)
+    })
+    .catch((error) => {
+      console.error(
+        `Failed to apply input camera_info / model_3d_info from ${comfyClass}:`,
+        error
+      )
+    })
+}
 
-  async nodeCreated(node: LGraphNode) {
-    if (node.constructor.comfyClass !== 'Preview3DAdvanced') return
+function createPreview3DAdvancedExtension(
+  comfyClass: string,
+  extensionName: string,
+  loadFolder: LoadFolder
+): ComfyExtension {
+  return {
+    name: extensionName,
 
-    const [oldWidth, oldHeight] = node.size
+    onNodeOutputsUpdated(
+      nodeOutputs: Record<NodeLocatorId, NodeExecutionOutput>
+    ) {
+      for (const [locatorId, output] of Object.entries(nodeOutputs)) {
+        const result = (output as Preview3DAdvancedOutput).result
+        if (!result?.[0]) continue
 
-    node.setSize([Math.max(oldWidth, 400), Math.max(oldHeight, 550)])
+        const node = getNodeByLocatorId(app.rootGraph, locatorId)
+        if (!node || node.constructor.comfyClass !== comfyClass) continue
 
-    await nextTick()
-
-    const onExecuted = node.onExecuted
-
-    useLoad3d(node).onLoad3dReady((load3d) => {
-      const lastTimeModelFile = node.properties['Last Time Model File']
-      if (!lastTimeModelFile) return
-
-      const config = new Load3DConfiguration(load3d, node.properties)
-      config.configureForSaveMesh('temp', lastTimeModelFile as string, {
-        silentOnNotFound: true
-      })
-
-      const cameraConfig = node.properties['Camera Config'] as
-        | CameraConfig
-        | undefined
-      const cameraState = cameraConfig?.state
-      if (!cameraState) return
-
-      const targetGeneration = load3d.currentLoadGeneration
-      void load3d
-        .whenLoadIdle()
-        .then(() => {
-          if (load3d.currentLoadGeneration !== targetGeneration) return
-          load3d.setCameraState(cameraState)
-          load3d.forceRender()
-        })
-        .catch((error) => {
-          console.error(
-            'Failed to restore camera state for Preview3DAdvanced:',
-            error
+        useLoad3d(node).waitForLoad3d((load3d) => {
+          applyPreview3DAdvancedResult(
+            node,
+            load3d,
+            result,
+            loadFolder,
+            comfyClass
           )
         })
-    })
-
-    useLoad3d(node).waitForLoad3d((load3d) => {
-      const sceneWidget = node.widgets?.find((w) => w.name === 'viewport_state')
-      if (!sceneWidget) return
-
-      const resolveLoad3d = () => nodeToLoad3dMap.get(node) ?? load3d
-
-      const widthWidget = node.widgets?.find((w) => w.name === 'width')
-      const heightWidget = node.widgets?.find((w) => w.name === 'height')
-      if (widthWidget && heightWidget) {
-        load3d.setTargetSize(
-          widthWidget.value as number,
-          heightWidget.value as number
-        )
-        widthWidget.callback = (value: number) => {
-          resolveLoad3d().setTargetSize(value, heightWidget.value as number)
-        }
-        heightWidget.callback = (value: number) => {
-          resolveLoad3d().setTargetSize(widthWidget.value as number, value)
-        }
       }
+    },
 
-      sceneWidget.serializeValue = async () => {
-        const currentLoad3d = nodeToLoad3dMap.get(node)
-        if (!currentLoad3d) {
-          console.error('No load3d instance found for node')
-          return null
-        }
+    getNodeMenuItems(node: LGraphNode): (IContextMenuValue | null)[] {
+      if (node.constructor.comfyClass !== comfyClass) return []
 
-        const cameraConfig: CameraConfig = (node.properties['Camera Config'] as
-          | CameraConfig
-          | undefined) || {
-          cameraType: currentLoad3d.getCurrentCameraType(),
-          fov: currentLoad3d.cameraManager.perspectiveCamera.fov
-        }
-        cameraConfig.state = currentLoad3d.getCameraState()
-        node.properties['Camera Config'] = cameraConfig
+      const load3d = useLoad3dService().getLoad3d(node)
+      if (!load3d) return []
 
-        const modelInfo = currentLoad3d.getModelInfo()
-        const model_3d_info: Model3DInfo = modelInfo ? [modelInfo] : []
+      if (load3d.isSplatModel()) return []
 
-        return {
-          image: '',
-          mask: '',
-          normal: '',
-          camera_info: cameraConfig.state || null,
-          recording: '',
-          model_3d_info
-        }
-      }
+      return createExportMenuItems(load3d)
+    },
 
-      node.onExecuted = function (output: Preview3DAdvancedOutput) {
-        onExecuted?.call(this, output)
+    async nodeCreated(node: LGraphNode) {
+      if (node.constructor.comfyClass !== comfyClass) return
 
-        const result = output.result
-        const filePath = result?.[0]
+      const [oldWidth, oldHeight] = node.size
 
-        if (!filePath) {
-          const msg = t('toastMessages.unableToGetModelFilePath')
-          console.error(msg)
-          useToastStore().addAlert(msg)
-          return
-        }
+      node.setSize([Math.max(oldWidth, 400), Math.max(oldHeight, 550)])
 
-        const normalizedPath = filePath.replaceAll('\\', '/')
-        node.properties['Last Time Model File'] = normalizedPath
+      await nextTick()
 
-        const currentLoad3d = resolveLoad3d()
-        const config = new Load3DConfiguration(currentLoad3d, node.properties)
-        config.configureForSaveMesh('temp', normalizedPath, {
+      const onExecuted = node.onExecuted
+      const { onLoad3dReady, waitForLoad3d } = useLoad3d(node)
+
+      onLoad3dReady((load3d) => {
+        const lastTimeModelFile = node.properties['Last Time Model File']
+        if (!lastTimeModelFile) return
+
+        const config = new Load3DConfiguration(load3d, node.properties)
+        config.configureForSaveMesh(loadFolder, lastTimeModelFile as string, {
           silentOnNotFound: true
         })
 
-        const cameraState = result?.[1]
-        const modelTransform = result?.[2]?.[0]
-        if (cameraState || modelTransform) {
-          const targetGeneration = currentLoad3d.currentLoadGeneration
-          void currentLoad3d
-            .whenLoadIdle()
-            .then(() => {
-              if (currentLoad3d.currentLoadGeneration !== targetGeneration)
-                return
-              if (cameraState) currentLoad3d.setCameraState(cameraState)
-              if (modelTransform)
-                currentLoad3d.applyModelTransform(modelTransform)
-            })
-            .catch((error) => {
-              console.error(
-                'Failed to apply input camera_info / model_3d_info from Preview3DAdvanced:',
-                error
-              )
-            })
+        const cameraConfig = node.properties['Camera Config'] as
+          | CameraConfig
+          | undefined
+        const cameraState = cameraConfig?.state
+        if (!cameraState) return
+
+        const targetGeneration = load3d.currentLoadGeneration
+        void load3d
+          .whenLoadIdle()
+          .then(() => {
+            if (load3d.currentLoadGeneration !== targetGeneration) return
+            load3d.setCameraState(cameraState)
+            load3d.forceRender()
+          })
+          .catch((error) => {
+            console.error(
+              `Failed to restore camera state for ${comfyClass}:`,
+              error
+            )
+          })
+      })
+
+      waitForLoad3d((load3d) => {
+        const sceneWidget = node.widgets?.find(
+          (w) => w.name === 'viewport_state'
+        )
+        if (!sceneWidget) return
+
+        const resolveLoad3d = () => nodeToLoad3dMap.get(node) ?? load3d
+
+        const widthWidget = node.widgets?.find((w) => w.name === 'width')
+        const heightWidget = node.widgets?.find((w) => w.name === 'height')
+        if (widthWidget && heightWidget) {
+          load3d.setTargetSize(
+            widthWidget.value as number,
+            heightWidget.value as number
+          )
+          widthWidget.callback = (value: number) => {
+            resolveLoad3d().setTargetSize(value, heightWidget.value as number)
+          }
+          heightWidget.callback = (value: number) => {
+            resolveLoad3d().setTargetSize(widthWidget.value as number, value)
+          }
         }
-      }
-    })
+
+        sceneWidget.serializeValue = async () => {
+          const currentLoad3d = nodeToLoad3dMap.get(node)
+          if (!currentLoad3d) {
+            console.error('No load3d instance found for node')
+            return null
+          }
+
+          const cameraConfig: CameraConfig = (node.properties[
+            'Camera Config'
+          ] as CameraConfig | undefined) || {
+            cameraType: currentLoad3d.getCurrentCameraType(),
+            fov: currentLoad3d.cameraManager.perspectiveCamera.fov
+          }
+          cameraConfig.state = currentLoad3d.getCameraState()
+          node.properties['Camera Config'] = cameraConfig
+
+          const modelInfo = currentLoad3d.getModelInfo()
+          const model_3d_info: Model3DInfo = modelInfo ? [modelInfo] : []
+
+          return {
+            image: '',
+            mask: '',
+            normal: '',
+            camera_info: cameraConfig.state || null,
+            recording: '',
+            model_3d_info
+          }
+        }
+
+        node.onExecuted = function (output: Preview3DAdvancedOutput) {
+          onExecuted?.call(this, output)
+
+          const result = output.result
+          if (!result?.[0]) {
+            const msg = t('toastMessages.unableToGetModelFilePath')
+            console.error(msg)
+            useToastStore().addAlert(msg)
+            return
+          }
+
+          applyPreview3DAdvancedResult(
+            node,
+            resolveLoad3d(),
+            result,
+            loadFolder,
+            comfyClass
+          )
+        }
+      })
+    }
   }
-})
+}
+
+useExtensionService().registerExtension(
+  createPreview3DAdvancedExtension(
+    'Preview3DAdvanced',
+    'Comfy.Preview3DAdvanced',
+    'temp'
+  )
+)
+useExtensionService().registerExtension(
+  createPreview3DAdvancedExtension(
+    'Save3DAdvanced',
+    'Comfy.Save3DAdvanced',
+    'output'
+  )
+)

src/extensions/core/load3d/interfaces.ts

@@ -14,6 +14,7 @@ export type MaterialMode =
 export type UpDirection = 'original' | '-x' | '+x' | '-y' | '+y' | '-z' | '+z'
 export type CameraType = 'perspective' | 'orthographic'
 export type BackgroundRenderModeType = 'tiled' | 'panorama'
+export type LoadFolder = 'temp' | 'output'
 
 interface CameraQuaternion {
   x: number

src/extensions/core/load3d/nodeTypes.ts

@@ -3,21 +3,24 @@
  * Adding a new node type that uses the viewer = one line change here.
  */
 
-const LOAD3D_PREVIEW_NODES = new Set([
+const LOAD3D_RESULT_VIEWER_NODES = new Set([
   'Preview3D',
   'PreviewGaussianSplat',
-  'PreviewPointCloud'
+  'PreviewPointCloud',
+  'Save3DAdvanced',
+  'SaveGaussianSplat',
+  'SavePointCloud'
 ])
 
 const LOAD3D_ALL_NODES = new Set([
-  ...LOAD3D_PREVIEW_NODES,
+  ...LOAD3D_RESULT_VIEWER_NODES,
   'Load3D',
   'Load3DAdvanced',
   'SaveGLB'
 ])
 
-export const isLoad3dPreviewNode = (nodeType: string): boolean =>
-  LOAD3D_PREVIEW_NODES.has(nodeType)
+export const isLoad3dResultViewerNode = (nodeType: string): boolean =>
+  LOAD3D_RESULT_VIEWER_NODES.has(nodeType)
 
 export const isLoad3dNode = (nodeType: string): boolean =>
   LOAD3D_ALL_NODES.has(nodeType)

src/extensions/core/load3dLazy.test.ts

@@ -90,7 +90,10 @@ describe('load3dLazy', () => {
     'Preview3D',
     'PreviewGaussianSplat',
     'PreviewPointCloud',
-    'SaveGLB'
+    'SaveGLB',
+    'Save3DAdvanced',
+    'SaveGaussianSplat',
+    'SavePointCloud'
   ])(
     'recognizes %s as a 3D node type and triggers the lazy-load path',
     async (nodeType) => {

src/extensions/core/load3dPreviewExtensions.test.ts

@@ -76,14 +76,24 @@ type ExtCreated = ComfyExtension & {
 async function loadExtensionsFresh(): Promise<{
   splatExt: ExtCreated
   pointCloudExt: ExtCreated
+  saveSplatExt: ExtCreated
+  savePointCloudExt: ExtCreated
 }> {
   vi.resetModules()
   registerExtensionMock.mockClear()
   await import('@/extensions/core/load3dPreviewExtensions')
-  const [splatCall, pointCloudCall] = registerExtensionMock.mock.calls
+  const extByName = (name: string): ExtCreated => {
+    const call = registerExtensionMock.mock.calls.find(
+      (c) => (c[0] as ExtCreated).name === name
+    )
+    if (!call) throw new Error(`Extension ${name} was not registered`)
+    return call[0] as ExtCreated
+  }
   return {
-    splatExt: splatCall[0] as ExtCreated,
-    pointCloudExt: pointCloudCall[0] as ExtCreated
+    splatExt: extByName('Comfy.PreviewGaussianSplat'),
+    pointCloudExt: extByName('Comfy.PreviewPointCloud'),
+    saveSplatExt: extByName('Comfy.SaveGaussianSplat'),
+    savePointCloudExt: extByName('Comfy.SavePointCloud')
   }
 }
 
@@ -92,6 +102,7 @@ interface FakeLoad3d {
   isSplatModel: ReturnType<typeof vi.fn>
   forceRender: ReturnType<typeof vi.fn>
   setCameraState: ReturnType<typeof vi.fn>
+  applyModelTransform: ReturnType<typeof vi.fn>
   setTargetSize: ReturnType<typeof vi.fn>
   getCurrentCameraType: ReturnType<typeof vi.fn>
   getCameraState: ReturnType<typeof vi.fn>
@@ -106,6 +117,7 @@ function makeLoad3dMock(): FakeLoad3d {
     isSplatModel: vi.fn(() => false),
     forceRender: vi.fn(),
     setCameraState: vi.fn(),
+    applyModelTransform: vi.fn(),
     setTargetSize: vi.fn(),
     getCurrentCameraType: vi.fn(() => 'perspective'),
     getCameraState: vi.fn(() => ({ position: { x: 0, y: 0, z: 0 } })),
@@ -151,12 +163,59 @@ function setupBaseMocks() {
 describe('load3dPreviewExtensions module registration', () => {
   beforeEach(setupBaseMocks)
 
-  it('registers both preview extensions on import', async () => {
-    const { splatExt, pointCloudExt } = await loadExtensionsFresh()
+  it('registers preview and save extensions on import', async () => {
+    const { splatExt, pointCloudExt, saveSplatExt, savePointCloudExt } =
+      await loadExtensionsFresh()
 
-    expect(registerExtensionMock).toHaveBeenCalledTimes(2)
+    expect(registerExtensionMock).toHaveBeenCalledTimes(4)
     expect(splatExt.name).toBe('Comfy.PreviewGaussianSplat')
     expect(pointCloudExt.name).toBe('Comfy.PreviewPointCloud')
+    expect(saveSplatExt.name).toBe('Comfy.SaveGaussianSplat')
+    expect(savePointCloudExt.name).toBe('Comfy.SavePointCloud')
+  })
+
+  it('save extensions load the saved file from the output folder, not temp', async () => {
+    const { saveSplatExt, savePointCloudExt } = await loadExtensionsFresh()
+    const load3d = makeLoad3dMock()
+    waitForLoad3dMock.mockImplementation((cb: (l: FakeLoad3d) => void) =>
+      cb(load3d)
+    )
+
+    const splatNode = makePreviewNode({ comfyClass: 'SaveGaussianSplat' })
+    await saveSplatExt.nodeCreated(splatNode)
+    splatNode.onExecuted!({ result: ['3d/ComfyUI_00001_.ply'] })
+
+    expect(configureForSaveMeshMock).toHaveBeenLastCalledWith(
+      'output',
+      '3d/ComfyUI_00001_.ply',
+      expect.objectContaining({ silentOnNotFound: true })
+    )
+
+    const pcNode = makePreviewNode({ comfyClass: 'SavePointCloud' })
+    await savePointCloudExt.nodeCreated(pcNode)
+    pcNode.onExecuted!({ result: ['3d/ComfyUI_00002_.ply'] })
+
+    expect(configureForSaveMeshMock).toHaveBeenLastCalledWith(
+      'output',
+      '3d/ComfyUI_00002_.ply',
+      expect.objectContaining({ silentOnNotFound: true })
+    )
+  })
+
+  it('restores persisted models from the output folder on nodeCreated, not temp', async () => {
+    const { saveSplatExt } = await loadExtensionsFresh()
+    const node = makePreviewNode({
+      comfyClass: 'SaveGaussianSplat',
+      properties: { 'Last Time Model File': '3d/ComfyUI_00001_.ply' }
+    })
+
+    await saveSplatExt.nodeCreated(node)
+
+    expect(configureForSaveMeshMock).toHaveBeenCalledWith(
+      'output',
+      '3d/ComfyUI_00001_.ply',
+      expect.objectContaining({ silentOnNotFound: true })
+    )
   })
 })
 
@@ -214,6 +273,44 @@ describe('Comfy.PreviewGaussianSplat.nodeCreated', () => {
     expect(cameraConfig?.state).toEqual(cameraState)
   })
 
+  it('applies onExecuted results to the remounted instance, not the disposed closure', async () => {
+    const { splatExt } = await loadExtensionsFresh()
+    const original = makeLoad3dMock()
+    waitForLoad3dMock.mockImplementation((cb: (l: FakeLoad3d) => void) =>
+      cb(original)
+    )
+    const node = makePreviewNode()
+
+    await splatExt.nodeCreated(node)
+
+    const remounted = makeLoad3dMock()
+    nodeToLoad3dMapMock.set(node, remounted)
+
+    node.onExecuted!({
+      result: ['scene.ply', { position: { x: 1, y: 2, z: 3 } }]
+    })
+    await new Promise((resolve) => setTimeout(resolve, 0))
+
+    expect(remounted.forceRender).toHaveBeenCalled()
+    expect(original.forceRender).not.toHaveBeenCalled()
+  })
+
+  it('re-applies the model transform from result[2] on execute', async () => {
+    const { saveSplatExt } = await loadExtensionsFresh()
+    const load3d = makeLoad3dMock()
+    waitForLoad3dMock.mockImplementation((cb: (l: FakeLoad3d) => void) =>
+      cb(load3d)
+    )
+    const node = makePreviewNode({ comfyClass: 'SaveGaussianSplat' })
+    const transform = { position: { x: 1, y: 2, z: 3 } }
+
+    await saveSplatExt.nodeCreated(node)
+    node.onExecuted!({ result: ['scene.ply', undefined, [transform]] })
+    await new Promise((resolve) => setTimeout(resolve, 0))
+
+    expect(load3d.applyModelTransform).toHaveBeenCalledWith(transform)
+  })
+
   it('syncs width/height widgets to load3d.setTargetSize and registers callbacks', async () => {
     const { splatExt } = await loadExtensionsFresh()
     const load3d = makeLoad3dMock()

src/extensions/core/load3dPreviewExtensions.ts

@@ -5,6 +5,7 @@ import { createExportMenuItems } from '@/extensions/core/load3d/exportMenuHelper
 import type {
   CameraConfig,
   CameraState,
+  LoadFolder,
   Model3DInfo
 } from '@/extensions/core/load3d/interfaces'
 import type Load3d from '@/extensions/core/load3d/Load3d'
@@ -29,7 +30,9 @@ function applyResultToLoad3d(
   node: LGraphNode,
   load3d: Load3d,
   filePath: string,
-  cameraState: CameraState | undefined
+  cameraState: CameraState | undefined,
+  modelTransform: Model3DInfo[number] | undefined,
+  loadFolder: LoadFolder
 ): void {
   const normalizedPath = filePath.replaceAll('\\', '/')
   node.properties['Last Time Model File'] = normalizedPath
@@ -46,7 +49,7 @@ function applyResultToLoad3d(
   }
 
   const config = new Load3DConfiguration(load3d, node.properties)
-  config.configureForSaveMesh('temp', normalizedPath, {
+  config.configureForSaveMesh(loadFolder, normalizedPath, {
     silentOnNotFound: true
   })
 
@@ -54,13 +57,15 @@ function applyResultToLoad3d(
   void load3d.whenLoadIdle().then(() => {
     if (load3d.currentLoadGeneration !== targetGeneration) return
     if (cameraState) load3d.setCameraState(cameraState)
+    if (modelTransform) load3d.applyModelTransform(modelTransform)
     load3d.forceRender()
   })
 }
 
 function createPreview3DExtension(
   comfyClass: string,
-  extensionName: string
+  extensionName: string,
+  loadFolder: LoadFolder
 ): ComfyExtension {
   const applyPreviewOutput = (
     node: LGraphNode,
@@ -68,10 +73,18 @@ function createPreview3DExtension(
   ): void => {
     const filePath = result[0]
     const cameraState = result[1]
+    const modelTransform = result[2]?.[0]
     if (!filePath) return
 
     useLoad3d(node).waitForLoad3d((load3d) => {
-      applyResultToLoad3d(node, load3d, filePath, cameraState)
+      applyResultToLoad3d(
+        node,
+        load3d,
+        filePath,
+        cameraState,
+        modelTransform,
+        loadFolder
+      )
     })
   }
 
@@ -119,7 +132,7 @@ function createPreview3DExtension(
         if (!lastTimeModelFile) return
 
         const config = new Load3DConfiguration(load3d, node.properties)
-        config.configureForSaveMesh('temp', lastTimeModelFile as string, {
+        config.configureForSaveMesh(loadFolder, lastTimeModelFile as string, {
           silentOnNotFound: true
         })
 
@@ -136,6 +149,8 @@ function createPreview3DExtension(
       })
 
       waitForLoad3d((load3d) => {
+        const resolveLoad3d = () => nodeToLoad3dMap.get(node) ?? load3d
+
         const sceneWidget = node.widgets?.find(
           (w) => w.name === 'viewport_state'
         )
@@ -148,10 +163,10 @@ function createPreview3DExtension(
             heightWidget.value as number
           )
           widthWidget.callback = (value: number) => {
-            load3d.setTargetSize(value, heightWidget.value as number)
+            resolveLoad3d().setTargetSize(value, heightWidget.value as number)
           }
           heightWidget.callback = (value: number) => {
-            load3d.setTargetSize(widthWidget.value as number, value)
+            resolveLoad3d().setTargetSize(widthWidget.value as number, value)
           }
         }
 
@@ -199,7 +214,14 @@ function createPreview3DExtension(
             return
           }
 
-          applyResultToLoad3d(node, load3d, filePath, result?.[1])
+          applyResultToLoad3d(
+            node,
+            resolveLoad3d(),
+            filePath,
+            result?.[1],
+            result?.[2]?.[0],
+            loadFolder
+          )
         }
       })
     }
@@ -207,8 +229,26 @@ function createPreview3DExtension(
 }
 
 useExtensionService().registerExtension(
-  createPreview3DExtension('PreviewGaussianSplat', 'Comfy.PreviewGaussianSplat')
+  createPreview3DExtension(
+    'PreviewGaussianSplat',
+    'Comfy.PreviewGaussianSplat',
+    'temp'
+  )
 )
 useExtensionService().registerExtension(
-  createPreview3DExtension('PreviewPointCloud', 'Comfy.PreviewPointCloud')
+  createPreview3DExtension(
+    'PreviewPointCloud',
+    'Comfy.PreviewPointCloud',
+    'temp'
+  )
+)
+useExtensionService().registerExtension(
+  createPreview3DExtension(
+    'SaveGaussianSplat',
+    'Comfy.SaveGaussianSplat',
+    'output'
+  )
+)
+useExtensionService().registerExtension(
+  createPreview3DExtension('SavePointCloud', 'Comfy.SavePointCloud', 'output')
 )

src/extensions/core/saveImageExtraOutput.test.ts

@@ -81,6 +81,9 @@ describe('Comfy.SaveImageExtraOutput', () => {
     'SaveAudioOpus',
     'SaveAudioAdvanced',
     'SaveGLB',
+    'Save3DAdvanced',
+    'SaveGaussianSplat',
+    'SavePointCloud',
     'SaveAnimatedPNG',
     'CLIPSave',
     'VAESave',

src/extensions/core/saveImageExtraOutput.ts

@@ -16,6 +16,9 @@ const saveNodeTypes = new Set([
   'SaveAudioOpus',
   'SaveAudioAdvanced',
   'SaveGLB',
+  'Save3DAdvanced',
+  'SaveGaussianSplat',
+  'SavePointCloud',
   'SaveAnimatedPNG',
   'CLIPSave',
   'VAESave',

src/lib/litegraph/src/reviewGuidanceVerification.test.ts

@@ -0,0 +1,27 @@
+import { describe, expect, it } from 'vitest'
+
+import { LGraph, LGraphNode } from '@/lib/litegraph/src/litegraph'
+
+import { serializesWorkflowWidget } from './reviewGuidanceVerification'
+
+function createGraph() {
+  const graph = new LGraph()
+  graph.add(new LGraphNode('review-guidance'))
+  return graph
+}
+
+describe('review guidance verification', () => {
+  it('adds a node to a graph', () => {
+    expect(createGraph().nodes).toHaveLength(1)
+  })
+
+  it('creates isolated graphs', () => {
+    expect(createGraph()).not.toBe(createGraph())
+  })
+
+  it('serializes workflow widgets', () => {
+    expect(serializesWorkflowWidget({ options: { serialize: true } })).toBe(
+      true
+    )
+  })
+})

src/lib/litegraph/src/reviewGuidanceVerification.ts

@@ -0,0 +1,11 @@
+interface ReviewGuidanceWidget {
+  options: {
+    serialize?: boolean
+  }
+}
+
+export function serializesWorkflowWidget(
+  widget: ReviewGuidanceWidget
+): boolean {
+  return widget.options.serialize === true
+}

src/locales/en/main.json

@@ -2170,7 +2170,8 @@
     "descLabel": "description",
     "textPlaceholder": "text to render (verbatim)",
     "descPlaceholder": "description of this region",
-    "colors": "color_palette"
+    "colors": "color_palette",
+    "grid": "Grid"
   },
   "palette": {
     "addColor": "Add a color",

src/renderer/extensions/vueNodes/widgets/composables/useBoundingBoxesWidget.test.ts

@@ -5,7 +5,7 @@ import type { InputSpec } from '@/schemas/nodeDef/nodeDefSchemaV2'
 
 import { useBoundingBoxesWidget } from './useBoundingBoxesWidget'
 
-const widgetOptions = { serialize: true, canvasOnly: false }
+const widgetOptions = { serialize: true, canvasOnly: false, hideInPanel: true }
 
 function mockNode() {
   return { addWidget: vi.fn(() => ({})) } as unknown as LGraphNode & {

src/renderer/extensions/vueNodes/widgets/composables/useBoundingBoxesWidget.ts

@@ -17,7 +17,8 @@ export const useBoundingBoxesWidget = (): ComfyWidgetConstructorV2 => {
       })) ?? []
     return node.addWidget('boundingboxes', spec.name, defaultValue, null, {
       serialize: true,
-      canvasOnly: false
+      canvasOnly: false,
+      hideInPanel: true
     }) as IBaseWidget
   }
 }

src/reviewGuidanceVerification.test.ts

@@ -0,0 +1,14 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import { loadReviewGuidanceVerification } from './reviewGuidanceVerification'
+
+describe('review guidance verification', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+  })
+
+  it('is ready for review', () => {
+    expect(true).toBe(true)
+    expect(loadReviewGuidanceVerification).toBeTypeOf('function')
+  })
+})

src/reviewGuidanceVerification.ts

@@ -0,0 +1,3 @@
+export function loadReviewGuidanceVerification(): Promise<Response> {
+  return fetch('/api/review-guidance')
+}