[backport cloud/1.42] fix: repoint ancestor promoted widget bindings when packing nested subgraphs (#10559)

Backport of #10532 to `cloud/1.42` Automatically created by backport workflow. ┆Issue is synchronized with this [Notion page](https://www.notion.so/PR-10559-backport-cloud-1-42-fix-repoint-ancestor-promoted-widget-bindings-when-packing-nested-32f6d73d365081d29cd8c11bc5422b80) by [Unito](https://www.unito.io) Co-authored-by: Alexander Brown <drjkl@comfy.org> Co-authored-by: Amp <amp@ampcode.com> Co-authored-by: Benjamin Lu <benjaminlu1107@gmail.com> Co-authored-by: Christian Byrne <cbyrne@comfy.org> Co-authored-by: GitHub Action <action@github.com> Co-authored-by: christian-byrne <72887196+christian-byrne@users.noreply.github.com> Co-authored-by: github-actions <github-actions@github.com> Co-authored-by: pythongosssss <125205205+pythongosssss@users.noreply.github.com> Co-authored-by: Yourz <crazilou@vip.qq.com>
2026-04-20 06:20:11 +00:00 · 2026-03-26 14:51:26 +09:00
parent 35aced5c9f
commit 698a43cc0d
9 changed files with 1431 additions and 9 deletions
--- a/browser_tests/assets/subgraphs/nested-pack-promoted-values.json
+++ b/browser_tests/assets/subgraphs/nested-pack-promoted-values.json
@@ -0,0 +1,817 @@
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+        "## Report workflow issue\n\nIf you found any issues when running this workflow, [report template issue here](https://github.com/Comfy-Org/workflow_templates/issues)\n\n\n## Model links\n\n**text_encoders**\n\n- [qwen_3_4b.safetensors](https://huggingface.co/Comfy-Org/z_image_turbo/resolve/main/split_files/text_encoders/qwen_3_4b.safetensors)\n\n**loras**\n\n- [pixel_art_style_z_image_turbo.safetensors](https://huggingface.co/tarn59/pixel_art_style_lora_z_image_turbo/resolve/main/pixel_art_style_z_image_turbo.safetensors)\n\n**diffusion_models**\n\n- [z_image_turbo_bf16.safetensors](https://huggingface.co/Comfy-Org/z_image_turbo/resolve/main/split_files/diffusion_models/z_image_turbo_bf16.safetensors)\n\n**vae**\n\n- [ae.safetensors](https://huggingface.co/Comfy-Org/z_image_turbo/resolve/main/split_files/vae/ae.safetensors)\n\n\nModel Storage Location\n\n```\n📂 ComfyUI/\n├── 📂 models/\n│   ├── 📂 text_encoders/\n│   │      └── qwen_3_4b.safetensors\n│   ├── 📂 loras/\n│   │      └── pixel_art_style_z_image_turbo.safetensors\n│   ├── 📂 diffusion_models/\n│   │      └── z_image_turbo_bf16.safetensors\n│   └── 📂 vae/\n│          └── ae.safetensors\n```\n"
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+            "id": 33,
+            "origin_id": 33,
+            "origin_slot": 0,
+            "target_id": 3,
+            "target_slot": 2,
+            "type": "CONDITIONING"
+          },
+          {
+            "id": 17,
+            "origin_id": 13,
+            "origin_slot": 0,
+            "target_id": 3,
+            "target_slot": 3,
+            "type": "LATENT"
+          },
+          {
+            "id": 28,
+            "origin_id": 30,
+            "origin_slot": 0,
+            "target_id": 27,
+            "target_slot": 0,
+            "type": "CLIP"
+          },
+          {
+            "id": 16,
+            "origin_id": 8,
+            "origin_slot": 0,
+            "target_id": -20,
+            "target_slot": 0,
+            "type": "IMAGE"
+          },
+          {
+            "id": 34,
+            "origin_id": -10,
+            "origin_slot": 0,
+            "target_id": 27,
+            "target_slot": 1,
+            "type": "STRING"
+          },
+          {
+            "id": 35,
+            "origin_id": -10,
+            "origin_slot": 1,
+            "target_id": 13,
+            "target_slot": 0,
+            "type": "INT"
+          },
+          {
+            "id": 36,
+            "origin_id": -10,
+            "origin_slot": 2,
+            "target_id": 13,
+            "target_slot": 1,
+            "type": "INT"
+          },
+          {
+            "id": 38,
+            "origin_id": -10,
+            "origin_slot": 3,
+            "target_id": 28,
+            "target_slot": 0,
+            "type": "COMBO"
+          },
+          {
+            "id": 39,
+            "origin_id": -10,
+            "origin_slot": 4,
+            "target_id": 30,
+            "target_slot": 0,
+            "type": "COMBO"
+          },
+          {
+            "id": 40,
+            "origin_id": -10,
+            "origin_slot": 5,
+            "target_id": 29,
+            "target_slot": 0,
+            "type": "COMBO"
+          },
+          {
+            "id": 70,
+            "origin_id": -10,
+            "origin_slot": 6,
+            "target_id": 3,
+            "target_slot": 4,
+            "type": "INT"
+          }
+        ],
+        "extra": {
+          "workflowRendererVersion": "LG"
+        }
+      }
+    ]
+  },
+  "config": {},
+  "extra": {
+    "ds": {
+      "scale": 0.6488294314381271,
+      "offset": [733, 392.7886597938144]
+    },
+    "frontendVersion": "1.43.4",
+    "workflowRendererVersion": "LG",
+    "VHS_latentpreview": false,
+    "VHS_latentpreviewrate": 0,
+    "VHS_MetadataImage": true,
+    "VHS_KeepIntermediate": true
+  },
+  "version": 0.4
+}
--- a/browser_tests/tests/subgraphLifecycle.spec.ts
+++ b/browser_tests/tests/subgraphLifecycle.spec.ts
@@ -142,12 +142,12 @@ test.describe(
      })
    })

-    test.describe('Placeholder Behavior After Promoted Source Removal', () => {
+    test.describe('Cleanup Behavior After Promoted Source Removal', () => {
      test.beforeEach(async ({ comfyPage }) => {
        await comfyPage.settings.setSetting('Comfy.UseNewMenu', 'Top')
      })

-      test('Removing promoted source node inside subgraph falls back to disconnected placeholder on exterior', async ({
+      test('Removing promoted source node inside subgraph cleans up exterior proxyWidgets', async ({
        comfyPage
      }) => {
        await comfyPage.workflow.loadWorkflow(
@@ -182,8 +182,8 @@ test.describe(
            })
          })
          .toEqual({
-            proxyWidgetCount: initialWidgets.length,
-            firstWidgetType: 'button'
+            proxyWidgetCount: 0,
+            firstWidgetType: undefined
          })
      })

--- a/browser_tests/tests/subgraphNestedPackValues.spec.ts
+++ b/browser_tests/tests/subgraphNestedPackValues.spec.ts
@@ -0,0 +1,195 @@
+import {
+  comfyPageFixture as test,
+  comfyExpect as expect
+} from '../fixtures/ComfyPage'
+
+/**
+ * Regression test for PR #10532:
+ * Packing all nodes inside a subgraph into a nested subgraph was causing
+ * the parent subgraph node's promoted widget values to go blank.
+ *
+ * Root cause: SubgraphNode had two sets of PromotedWidgetView references —
+ * node.widgets (rebuilt from the promotion store) vs input._widget (cached
+ * at promotion time). After repointing, input._widget still pointed to
+ * removed node IDs, causing missing-node failures and blank values on the
+ * next checkState cycle.
+ */
+test.describe(
+  'Nested subgraph pack preserves promoted widget values',
+  { tag: ['@subgraph', '@widget'] },
+  () => {
+    const WORKFLOW = 'subgraphs/nested-pack-promoted-values'
+    const HOST_NODE_ID = '57'
+
+    test.beforeEach(async ({ comfyPage }) => {
+      await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
+    })
+
+    test('Promoted widget values persist after packing interior nodes into nested subgraph', async ({
+      comfyPage
+    }) => {
+      await comfyPage.workflow.loadWorkflow(WORKFLOW)
+      await comfyPage.vueNodes.waitForNodes()
+
+      const nodeLocator = comfyPage.vueNodes.getNodeLocator(HOST_NODE_ID)
+      await expect(nodeLocator).toBeVisible()
+
+      // 1. Verify initial promoted widget values via Vue node DOM
+      const widthWidget = nodeLocator
+        .getByLabel('width', { exact: true })
+        .first()
+      const heightWidget = nodeLocator
+        .getByLabel('height', { exact: true })
+        .first()
+      const stepsWidget = nodeLocator
+        .getByLabel('steps', { exact: true })
+        .first()
+      const textWidget = nodeLocator.getByRole('textbox', { name: 'prompt' })
+
+      const widthControls =
+        comfyPage.vueNodes.getInputNumberControls(widthWidget)
+      const heightControls =
+        comfyPage.vueNodes.getInputNumberControls(heightWidget)
+      const stepsControls =
+        comfyPage.vueNodes.getInputNumberControls(stepsWidget)
+
+      await expect(async () => {
+        await expect(widthControls.input).toHaveValue('1024')
+        await expect(heightControls.input).toHaveValue('1024')
+        await expect(stepsControls.input).toHaveValue('8')
+        await expect(textWidget).toHaveValue(/Latina female/)
+      }).toPass({ timeout: 5000 })
+
+      // 2. Enter the subgraph via Vue node button
+      await comfyPage.vueNodes.enterSubgraph(HOST_NODE_ID)
+      expect(await comfyPage.subgraph.isInSubgraph()).toBe(true)
+
+      // 3. Disable Vue nodes for canvas operations (select all + convert)
+      await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', false)
+      await comfyPage.nextFrame()
+
+      // 4. Select all interior nodes and convert to nested subgraph
+      await comfyPage.canvas.click()
+      await comfyPage.canvas.press('Control+a')
+      await comfyPage.nextFrame()
+
+      await comfyPage.page.evaluate(() => {
+        const canvas = window.app!.canvas
+        canvas.graph!.convertToSubgraph(canvas.selectedItems)
+      })
+      await comfyPage.nextFrame()
+
+      // 5. Navigate back to root graph and trigger a checkState cycle
+      await comfyPage.subgraph.exitViaBreadcrumb()
+      await comfyPage.canvas.click()
+      await comfyPage.nextFrame()
+
+      // 6. Re-enable Vue nodes and verify values are preserved
+      await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
+      await comfyPage.vueNodes.waitForNodes()
+
+      const nodeAfter = comfyPage.vueNodes.getNodeLocator(HOST_NODE_ID)
+      await expect(nodeAfter).toBeVisible()
+
+      const widthAfter = nodeAfter.getByLabel('width', { exact: true }).first()
+      const heightAfter = nodeAfter
+        .getByLabel('height', { exact: true })
+        .first()
+      const stepsAfter = nodeAfter.getByLabel('steps', { exact: true }).first()
+      const textAfter = nodeAfter.getByRole('textbox', { name: 'prompt' })
+
+      const widthControlsAfter =
+        comfyPage.vueNodes.getInputNumberControls(widthAfter)
+      const heightControlsAfter =
+        comfyPage.vueNodes.getInputNumberControls(heightAfter)
+      const stepsControlsAfter =
+        comfyPage.vueNodes.getInputNumberControls(stepsAfter)
+
+      await expect(async () => {
+        await expect(widthControlsAfter.input).toHaveValue('1024')
+        await expect(heightControlsAfter.input).toHaveValue('1024')
+        await expect(stepsControlsAfter.input).toHaveValue('8')
+        await expect(textAfter).toHaveValue(/Latina female/)
+      }).toPass({ timeout: 5000 })
+    })
+
+    test('proxyWidgets entries resolve to valid interior nodes after packing', async ({
+      comfyPage
+    }) => {
+      await comfyPage.workflow.loadWorkflow(WORKFLOW)
+      await comfyPage.vueNodes.waitForNodes()
+
+      // Verify the host node is visible
+      const nodeLocator = comfyPage.vueNodes.getNodeLocator(HOST_NODE_ID)
+      await expect(nodeLocator).toBeVisible()
+
+      // Enter the subgraph via Vue node button, then disable for canvas ops
+      await comfyPage.vueNodes.enterSubgraph(HOST_NODE_ID)
+      await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', false)
+      await comfyPage.nextFrame()
+
+      await comfyPage.canvas.click()
+      await comfyPage.canvas.press('Control+a')
+      await comfyPage.nextFrame()
+
+      await comfyPage.page.evaluate(() => {
+        const canvas = window.app!.canvas
+        canvas.graph!.convertToSubgraph(canvas.selectedItems)
+      })
+      await comfyPage.nextFrame()
+
+      await comfyPage.subgraph.exitViaBreadcrumb()
+      await comfyPage.canvas.click()
+      await comfyPage.nextFrame()
+
+      // Verify all proxyWidgets entries resolve
+      await expect(async () => {
+        const result = await comfyPage.page.evaluate((hostId) => {
+          const graph = window.app!.graph!
+          const hostNode = graph.getNodeById(hostId)
+          if (
+            !hostNode ||
+            typeof hostNode.isSubgraphNode !== 'function' ||
+            !hostNode.isSubgraphNode()
+          ) {
+            return { error: 'Host node not found or not a subgraph node' }
+          }
+
+          const proxyWidgets = hostNode.properties?.proxyWidgets ?? []
+          const entries = (proxyWidgets as unknown[])
+            .filter(
+              (e): e is [string, string] =>
+                Array.isArray(e) &&
+                e.length >= 2 &&
+                typeof e[0] === 'string' &&
+                typeof e[1] === 'string' &&
+                !e[1].startsWith('$$')
+            )
+            .map(([nodeId, widgetName]) => {
+              const interiorNode = hostNode.subgraph.getNodeById(Number(nodeId))
+              return {
+                nodeId,
+                widgetName,
+                resolved: interiorNode !== null && interiorNode !== undefined
+              }
+            })
+
+          return { entries, count: entries.length }
+        }, HOST_NODE_ID)
+
+        expect(result).not.toHaveProperty('error')
+        const { entries, count } = result as {
+          entries: { nodeId: string; widgetName: string; resolved: boolean }[]
+          count: number
+        }
+        expect(count).toBeGreaterThan(0)
+        for (const entry of entries) {
+          expect(
+            entry.resolved,
+            `Widget "${entry.widgetName}" (node ${entry.nodeId}) should resolve`
+          ).toBe(true)
+        }
+      }).toPass({ timeout: 5000 })
+    })
+  }
+)
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
    "stylelint:fix": "stylelint --cache --fix '{apps,packages,src}/**/*.{css,vue}'",
    "stylelint": "stylelint --cache '{apps,packages,src}/**/*.{css,vue}'",
    "test:browser": "pnpm exec nx e2e",
-    "test:browser:local": "cross-env PLAYWRIGHT_LOCAL=1 pnpm test:browser",
+    "test:browser:local": "cross-env PLAYWRIGHT_LOCAL=1 PLAYWRIGHT_TEST_URL=http://localhost:5173 pnpm test:browser",
    "test:unit": "nx run test",
    "typecheck": "vue-tsc --noEmit",
    "typecheck:browser": "vue-tsc --project browser_tests/tsconfig.json",
--- a/src/lib/litegraph/src/LGraph.repointAncestorPromotions.test.ts
+++ b/src/lib/litegraph/src/LGraph.repointAncestorPromotions.test.ts
@@ -0,0 +1,287 @@
+import { createTestingPinia } from '@pinia/testing'
+import { setActivePinia } from 'pinia'
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+
+import {
+  LGraphNode,
+  LiteGraph,
+  SubgraphNode
+} from '@/lib/litegraph/src/litegraph'
+import type {
+  ExportedSubgraphInstance,
+  Positionable,
+  Subgraph
+} from '@/lib/litegraph/src/litegraph'
+import {
+  createTestSubgraph,
+  createTestSubgraphNode,
+  resetSubgraphFixtureState
+} from '@/lib/litegraph/src/subgraph/__fixtures__/subgraphHelpers'
+import { usePromotionStore } from '@/stores/promotionStore'
+
+/**
+ * Registers a minimal SubgraphNode class for a subgraph definition
+ * so that `LiteGraph.createNode(subgraphId)` works in tests.
+ */
+function registerSubgraphNodeType(subgraph: Subgraph): void {
+  const instanceData: ExportedSubgraphInstance = {
+    id: -1,
+    type: subgraph.id,
+    pos: [0, 0],
+    size: [100, 100],
+    inputs: [],
+    outputs: [],
+    flags: {},
+    order: 0,
+    mode: 0
+  }
+
+  const node = class extends SubgraphNode {
+    constructor() {
+      super(subgraph.rootGraph, subgraph, instanceData)
+    }
+  }
+  Object.defineProperty(node, 'title', { value: subgraph.name })
+  LiteGraph.registerNodeType(subgraph.id, node)
+}
+
+const registeredTypes: string[] = []
+
+afterEach(() => {
+  for (const type of registeredTypes) {
+    LiteGraph.unregisterNodeType(type)
+  }
+  registeredTypes.length = 0
+})
+
+beforeEach(() => {
+  setActivePinia(createTestingPinia({ stubActions: false }))
+  resetSubgraphFixtureState()
+})
+
+describe('_repointAncestorPromotions', () => {
+  function setupParentSubgraphWithWidgets() {
+    const parentSubgraph = createTestSubgraph({
+      name: 'Parent Subgraph',
+      inputs: [{ name: 'input', type: '*' }],
+      outputs: [{ name: 'output', type: '*' }]
+    })
+    const rootGraph = parentSubgraph.rootGraph
+
+    // We need to listen for new subgraph registrations so
+    // LiteGraph.createNode works during convertToSubgraph
+    rootGraph.events.addEventListener('subgraph-created', (e) => {
+      const { subgraph } = e.detail
+      registerSubgraphNodeType(subgraph)
+      registeredTypes.push(subgraph.id)
+    })
+
+    const interiorNode = new LGraphNode('Interior Node')
+    interiorNode.addInput('in', '*')
+    interiorNode.addOutput('out', '*')
+    interiorNode.addWidget('text', 'prompt', 'hello world', () => {})
+    parentSubgraph.add(interiorNode)
+
+    // Create host SubgraphNode in root graph
+    registerSubgraphNodeType(parentSubgraph)
+    registeredTypes.push(parentSubgraph.id)
+    const hostNode = createTestSubgraphNode(parentSubgraph)
+    rootGraph.add(hostNode)
+
+    return { rootGraph, parentSubgraph, interiorNode, hostNode }
+  }
+
+  it('repoints parent promotions when interior nodes are packed into a nested subgraph', () => {
+    const { rootGraph, parentSubgraph, interiorNode, hostNode } =
+      setupParentSubgraphWithWidgets()
+
+    // Promote the interior node's widget on the host
+    const store = usePromotionStore()
+    store.promote(rootGraph.id, hostNode.id, {
+      sourceNodeId: String(interiorNode.id),
+      sourceWidgetName: 'prompt'
+    })
+
+    const beforeEntries = store.getPromotions(rootGraph.id, hostNode.id)
+    expect(beforeEntries).toHaveLength(1)
+    expect(beforeEntries[0].sourceNodeId).toBe(String(interiorNode.id))
+
+    // Pack the interior node into a nested subgraph
+    const { node: nestedSubgraphNode } = parentSubgraph.convertToSubgraph(
+      new Set<Positionable>([interiorNode])
+    )
+
+    // After conversion, the host's promotion should be repointed
+    const afterEntries = store.getPromotions(rootGraph.id, hostNode.id)
+    expect(afterEntries).toHaveLength(1)
+    expect(afterEntries[0].sourceNodeId).toBe(String(nestedSubgraphNode.id))
+    expect(afterEntries[0].sourceWidgetName).toBe('prompt')
+    expect(afterEntries[0].disambiguatingSourceNodeId).toBe(
+      String(interiorNode.id)
+    )
+
+    // The nested subgraph node should also have the promotion
+    const nestedEntries = store.getPromotions(
+      rootGraph.id,
+      nestedSubgraphNode.id
+    )
+    expect(nestedEntries).toHaveLength(1)
+    expect(nestedEntries[0].sourceNodeId).toBe(String(interiorNode.id))
+    expect(nestedEntries[0].sourceWidgetName).toBe('prompt')
+  })
+
+  it('preserves promotions that reference non-moved nodes', () => {
+    const { rootGraph, parentSubgraph, interiorNode, hostNode } =
+      setupParentSubgraphWithWidgets()
+
+    const remainingNode = new LGraphNode('Remaining Node')
+    remainingNode.addWidget('text', 'widget_b', 'b', () => {})
+    parentSubgraph.add(remainingNode)
+
+    const store = usePromotionStore()
+    store.promote(rootGraph.id, hostNode.id, {
+      sourceNodeId: String(interiorNode.id),
+      sourceWidgetName: 'prompt'
+    })
+    store.promote(rootGraph.id, hostNode.id, {
+      sourceNodeId: String(remainingNode.id),
+      sourceWidgetName: 'widget_b'
+    })
+
+    // Pack only the interiorNode
+    parentSubgraph.convertToSubgraph(new Set<Positionable>([interiorNode]))
+
+    const afterEntries = store.getPromotions(rootGraph.id, hostNode.id)
+    expect(afterEntries).toHaveLength(2)
+
+    // The remaining node's promotion should be unchanged
+    const remainingEntry = afterEntries.find(
+      (e) => e.sourceWidgetName === 'widget_b'
+    )
+    expect(remainingEntry?.sourceNodeId).toBe(String(remainingNode.id))
+    expect(remainingEntry?.disambiguatingSourceNodeId).toBeUndefined()
+
+    // The moved node's promotion should be repointed
+    const movedEntry = afterEntries.find((e) => e.sourceWidgetName === 'prompt')
+    expect(movedEntry?.sourceNodeId).not.toBe(String(interiorNode.id))
+    expect(movedEntry?.disambiguatingSourceNodeId).toBe(String(interiorNode.id))
+  })
+
+  it('does not modify promotions when converting in root graph', () => {
+    const parentSubgraph = createTestSubgraph({ name: 'Dummy' })
+    const rootGraph = parentSubgraph.rootGraph
+
+    rootGraph.events.addEventListener('subgraph-created', (e) => {
+      const { subgraph } = e.detail
+      registerSubgraphNodeType(subgraph)
+      registeredTypes.push(subgraph.id)
+    })
+
+    const node = new LGraphNode('Root Node')
+    node.addInput('in', '*')
+    node.addOutput('out', '*')
+    node.addWidget('text', 'value', 'test', () => {})
+    rootGraph.add(node)
+
+    // Converting in root graph should not throw
+    rootGraph.convertToSubgraph(new Set<Positionable>([node]))
+  })
+
+  it('uses existing disambiguatingSourceNodeId as fallback on repeat packing', () => {
+    const { rootGraph, parentSubgraph, interiorNode, hostNode } =
+      setupParentSubgraphWithWidgets()
+
+    const store = usePromotionStore()
+    store.promote(rootGraph.id, hostNode.id, {
+      sourceNodeId: String(interiorNode.id),
+      sourceWidgetName: 'prompt'
+    })
+
+    // First pack: interior node → nested subgraph
+    const { node: firstNestedNode } = parentSubgraph.convertToSubgraph(
+      new Set<Positionable>([interiorNode])
+    )
+
+    const afterFirstPack = store.getPromotions(rootGraph.id, hostNode.id)
+    expect(afterFirstPack).toHaveLength(1)
+    expect(afterFirstPack[0].sourceNodeId).toBe(String(firstNestedNode.id))
+    expect(afterFirstPack[0].disambiguatingSourceNodeId).toBe(
+      String(interiorNode.id)
+    )
+
+    // Second pack: nested subgraph → another level of nesting
+    const { node: secondNestedNode } = parentSubgraph.convertToSubgraph(
+      new Set<Positionable>([firstNestedNode])
+    )
+
+    // After second pack, promotion should use the disambiguatingSourceNodeId
+    // as fallback and point to the new nested node
+    const afterSecondPack = store.getPromotions(rootGraph.id, hostNode.id)
+    expect(afterSecondPack).toHaveLength(1)
+    expect(afterSecondPack[0].sourceNodeId).toBe(String(secondNestedNode.id))
+    expect(afterSecondPack[0].disambiguatingSourceNodeId).toBe(
+      String(interiorNode.id)
+    )
+  })
+
+  it('repoints promotions for multiple host instances of the same subgraph', () => {
+    const parentSubgraph = createTestSubgraph({
+      name: 'Shared Parent Subgraph',
+      inputs: [{ name: 'input', type: '*' }],
+      outputs: [{ name: 'output', type: '*' }]
+    })
+    const rootGraph = parentSubgraph.rootGraph
+
+    rootGraph.events.addEventListener('subgraph-created', (e) => {
+      const { subgraph } = e.detail
+      registerSubgraphNodeType(subgraph)
+      registeredTypes.push(subgraph.id)
+    })
+
+    const interiorNode = new LGraphNode('Interior Node')
+    interiorNode.addInput('in', '*')
+    interiorNode.addOutput('out', '*')
+    interiorNode.addWidget('text', 'prompt', 'shared', () => {})
+    parentSubgraph.add(interiorNode)
+
+    // Create TWO host SubgraphNodes pointing to the same subgraph
+    registerSubgraphNodeType(parentSubgraph)
+    registeredTypes.push(parentSubgraph.id)
+
+    const hostNode1 = createTestSubgraphNode(parentSubgraph)
+    const hostNode2 = createTestSubgraphNode(parentSubgraph)
+    rootGraph.add(hostNode1)
+    rootGraph.add(hostNode2)
+
+    // Promote on both hosts
+    const store = usePromotionStore()
+    store.promote(rootGraph.id, hostNode1.id, {
+      sourceNodeId: String(interiorNode.id),
+      sourceWidgetName: 'prompt'
+    })
+    store.promote(rootGraph.id, hostNode2.id, {
+      sourceNodeId: String(interiorNode.id),
+      sourceWidgetName: 'prompt'
+    })
+
+    // Pack the interior node
+    const { node: nestedNode } = parentSubgraph.convertToSubgraph(
+      new Set<Positionable>([interiorNode])
+    )
+
+    // Both hosts' promotions should be repointed to the nested node
+    const host1Promotions = store.getPromotions(rootGraph.id, hostNode1.id)
+    expect(host1Promotions).toHaveLength(1)
+    expect(host1Promotions[0].sourceNodeId).toBe(String(nestedNode.id))
+    expect(host1Promotions[0].disambiguatingSourceNodeId).toBe(
+      String(interiorNode.id)
+    )
+
+    const host2Promotions = store.getPromotions(rootGraph.id, hostNode2.id)
+    expect(host2Promotions).toHaveLength(1)
+    expect(host2Promotions[0].sourceNodeId).toBe(String(nestedNode.id))
+    expect(host2Promotions[0].disambiguatingSourceNodeId).toBe(
+      String(interiorNode.id)
+    )
+  })
+})
--- a/src/lib/litegraph/src/LGraph.ts
+++ b/src/lib/litegraph/src/LGraph.ts
@@ -1,5 +1,6 @@
 import { toString } from 'es-toolkit/compat'

+import type { PromotedWidgetSource } from '@/core/graph/subgraph/promotedWidgetTypes'
 import {
  SUBGRAPH_INPUT_ID,
  SUBGRAPH_OUTPUT_ID
@@ -9,7 +10,10 @@ import type { UUID } from '@/lib/litegraph/src/utils/uuid'
 import { createUuidv4, zeroUuid } from '@/lib/litegraph/src/utils/uuid'
 import { useLayoutMutations } from '@/renderer/core/layout/operations/layoutMutations'
 import { LayoutSource } from '@/renderer/core/layout/types'
-import { usePromotionStore } from '@/stores/promotionStore'
+import {
+  makePromotionEntryKey,
+  usePromotionStore
+} from '@/stores/promotionStore'
 import { useWidgetValueStore } from '@/stores/widgetValueStore'
 import { forEachNode } from '@/utils/graphTraversalUtil'

@@ -1952,6 +1956,13 @@ export class LGraph
    subgraphNode._setConcreteSlots()
    subgraphNode.arrange()

+    // Repair ancestor promotions: when nodes are packed into a nested
+    // subgraph, any host SubgraphNode whose proxyWidgets referenced the
+    // moved nodes must be repointed to chain through the new nested node.
+    if (!this.isRootGraph) {
+      this._repointAncestorPromotions(nodes, subgraphNode as SubgraphNode)
+    }
+
    this.canvasAction((c) =>
      c.canvas.dispatchEvent(
        new CustomEvent('subgraph-converted', {
@@ -1964,6 +1975,75 @@ export class LGraph
    return { subgraph, node: subgraphNode as SubgraphNode }
  }

+  /**
+   * After packing nodes into a nested subgraph, repoint any ancestor
+   * SubgraphNode promotions that referenced the moved nodes so they
+   * chain through the newly created nested SubgraphNode.
+   */
+  private _repointAncestorPromotions(
+    movedNodes: Set<LGraphNode>,
+    nestedSubgraphNode: SubgraphNode
+  ): void {
+    const movedNodeIds = new Set([...movedNodes].map((n) => String(n.id)))
+    const store = usePromotionStore()
+    const nestedNodeId = String(nestedSubgraphNode.id)
+    const graphId = this.rootGraph.id
+    const nestedEntries = store.getPromotions(graphId, nestedSubgraphNode.id)
+    const nextNestedEntries = [...nestedEntries]
+    const nestedEntryKeys = new Set(
+      nestedEntries.map((entry) => makePromotionEntryKey(entry))
+    )
+    const hostUpdates: Array<{
+      node: SubgraphNode
+      entries: PromotedWidgetSource[]
+    }> = []
+
+    // Find all SubgraphNode instances that host `this` subgraph.
+    // They live in any graph and have `type === this.id`.
+    const allGraphs: LGraph[] = [
+      this.rootGraph,
+      ...this.rootGraph._subgraphs.values()
+    ]
+    for (const graph of allGraphs) {
+      for (const node of graph._nodes) {
+        if (!node.isSubgraphNode() || node.type !== this.id) continue
+
+        const entries = store.getPromotions(graphId, node.id)
+        const movedEntries = entries.filter((entry) =>
+          movedNodeIds.has(entry.sourceNodeId)
+        )
+        if (movedEntries.length === 0) continue
+
+        for (const entry of movedEntries) {
+          const key = makePromotionEntryKey(entry)
+          if (nestedEntryKeys.has(key)) continue
+          nestedEntryKeys.add(key)
+          nextNestedEntries.push(entry)
+        }
+
+        const nextEntries = entries.map((entry) => {
+          if (!movedNodeIds.has(entry.sourceNodeId)) return entry
+          return {
+            sourceNodeId: nestedNodeId,
+            sourceWidgetName: entry.sourceWidgetName,
+            disambiguatingSourceNodeId:
+              entry.disambiguatingSourceNodeId ?? entry.sourceNodeId
+          }
+        })
+
+        hostUpdates.push({ node, entries: nextEntries })
+      }
+    }
+
+    if (nextNestedEntries.length !== nestedEntries.length)
+      store.setPromotions(graphId, nestedSubgraphNode.id, nextNestedEntries)
+
+    for (const { node, entries } of hostUpdates) {
+      store.setPromotions(graphId, node.id, entries)
+      node.rebuildInputWidgetBindings()
+    }
+  }
+
  unpackSubgraph(
    subgraphNode: SubgraphNode,
    options?: { skipMissingNodes?: boolean }
--- a/src/lib/litegraph/src/subgraph/SubgraphInputNode.ts
+++ b/src/lib/litegraph/src/subgraph/SubgraphInputNode.ts
@@ -209,6 +209,14 @@ export class SubgraphInputNode
        link.id
      )
    }
+
+    if (subgraphInput.linkIds.length === 0) {
+      subgraphInput._widget = undefined
+    }
+    subgraphInput.events.dispatch('input-disconnected', {
+      input: subgraphInput
+    })
+
    const slotIndex = node.inputs.findIndex((inp) => inp === input)
    if (slotIndex !== -1) {
      node.onConnectionsChange?.(
--- a/src/lib/litegraph/src/subgraph/SubgraphNode.ts
+++ b/src/lib/litegraph/src/subgraph/SubgraphNode.ts
@@ -882,8 +882,20 @@ export class SubgraphNode extends LGraphNode implements BaseLGraph {
          usePromotionStore().demote(this.rootGraph.id, this.id, source)
        }

-        const didSetWidgetFromEvent = !input._widget
-        if (didSetWidgetFromEvent)
+        const boundWidget =
+          input._widget && isPromotedWidgetView(input._widget)
+            ? input._widget
+            : undefined
+        const hasStaleBoundWidget =
+          boundWidget &&
+          this.subgraph
+            .getNodeById(boundWidget.sourceNodeId)
+            ?.widgets?.some(
+              (widget) => widget.name === boundWidget.sourceWidgetName
+            ) !== true
+
+        const shouldSetWidgetFromEvent = !input._widget || hasStaleBoundWidget
+        if (shouldSetWidgetFromEvent)
          this._setWidget(
            subgraphInput,
            input,
@@ -1107,6 +1119,27 @@ export class SubgraphNode extends LGraphNode implements BaseLGraph {
    }
  }

+  /**
+   * Clears all cached promoted widget views and re-resolves `input._widget`
+   * bindings from the current subgraph connections.  Called after ancestor
+   * promotions are repointed during nested subgraph packing.
+   */
+  rebuildInputWidgetBindings(): void {
+    this._promotedViewManager.clear()
+    this._invalidatePromotedViewsCache()
+
+    for (const input of this.inputs) {
+      delete input.widget
+      delete input.pos
+      input._widget = undefined
+      const subgraphInput = input._subgraphSlot
+      if (!subgraphInput) continue
+      this._resolveInputWidget(subgraphInput, input)
+    }
+
+    this._syncPromotions()
+  }
+
  private _resolveInputWidget(
    subgraphInput: SubgraphInput,
    input: INodeInputSlot
--- a/src/lib/litegraph/src/subgraph/SubgraphWidgetPromotion.test.ts
+++ b/src/lib/litegraph/src/subgraph/SubgraphWidgetPromotion.test.ts
@@ -298,13 +298,14 @@ describe('SubgraphWidgetPromotion', () => {
      subgraph.add(vaeNode)

      const outerNode = createTestSubgraphNode(subgraph)
+      const keptSamplerNodeId = String(samplerNode.id)

      // Inject stale proxyWidgets referencing nodes that don't exist in
      // this subgraph (they were packed into a nested subgraph)
      outerNode.properties.proxyWidgets = [
        ['999', 'text'],
        ['998', 'text'],
-        [String(samplerNode.id), 'widget']
+        [keptSamplerNodeId, 'widget']
      ]

      outerNode.configure(outerNode.serialize())
@@ -317,6 +318,7 @@ describe('SubgraphWidgetPromotion', () => {

      expect(widgetSourceIds).not.toContain('999')
      expect(widgetSourceIds).not.toContain('998')
+      expect(widgetSourceIds).toContain(keptSamplerNodeId)
    })
  })