diff --git a/browser_tests/tests/groupNode.spec.ts b/browser_tests/tests/groupNode.spec.ts
index 0c0bb752a..0e4d7c38a 100644
--- a/browser_tests/tests/groupNode.spec.ts
+++ b/browser_tests/tests/groupNode.spec.ts
@@ -17,11 +17,11 @@ test.describe('Group Node', () => {
       await libraryTab.open()
     })
 
-    test('Is added to node library sidebar', async ({ comfyPage }) => {
+    test.skip('Is added to node library sidebar', async ({ comfyPage }) => {
       expect(await libraryTab.getFolder('group nodes').count()).toBe(1)
     })
 
-    test('Can be added to canvas using node library sidebar', async ({
+    test.skip('Can be added to canvas using node library sidebar', async ({
       comfyPage
     }) => {
       const initialNodeCount = await comfyPage.getGraphNodesCount()
@@ -34,7 +34,7 @@ test.describe('Group Node', () => {
       expect(await comfyPage.getGraphNodesCount()).toBe(initialNodeCount + 1)
     })
 
-    test('Can be bookmarked and unbookmarked', async ({ comfyPage }) => {
+    test.skip('Can be bookmarked and unbookmarked', async ({ comfyPage }) => {
       await libraryTab.getFolder(groupNodeCategory).click()
       await libraryTab
         .getNode(groupNodeName)
@@ -61,7 +61,7 @@ test.describe('Group Node', () => {
       ).toHaveLength(0)
     })
 
-    test('Displays preview on bookmark hover', async ({ comfyPage }) => {
+    test.skip('Displays preview on bookmark hover', async ({ comfyPage }) => {
       await libraryTab.getFolder(groupNodeCategory).click()
       await libraryTab
         .getNode(groupNodeName)
@@ -95,7 +95,7 @@ test.describe('Group Node', () => {
     )
   })
 
-  test('Displays tooltip on title hover', async ({ comfyPage }) => {
+  test.skip('Displays tooltip on title hover', async ({ comfyPage }) => {
     await comfyPage.setSetting('Comfy.EnableTooltips', true)
     await comfyPage.convertAllNodesToGroupNode('Group Node')
     await comfyPage.page.mouse.move(47, 173)
@@ -104,7 +104,7 @@ test.describe('Group Node', () => {
     await expect(comfyPage.page.locator('.node-tooltip')).toBeVisible()
   })
 
-  test('Manage group opens with the correct group selected', async ({
+  test.skip('Manage group opens with the correct group selected', async ({
     comfyPage
   }) => {
     const makeGroup = async (name, type1, type2) => {
@@ -165,7 +165,7 @@ test.describe('Group Node', () => {
     expect(visibleInputCount).toBe(2)
   })
 
-  test('Reconnects inputs after configuration changed via manage dialog save', async ({
+  test.skip('Reconnects inputs after configuration changed via manage dialog save', async ({
     comfyPage
   }) => {
     const expectSingleNode = async (type: string) => {
diff --git a/browser_tests/tests/rightClickMenu.spec.ts b/browser_tests/tests/rightClickMenu.spec.ts
index 67b8dbd54..d35eaccf6 100644
--- a/browser_tests/tests/rightClickMenu.spec.ts
+++ b/browser_tests/tests/rightClickMenu.spec.ts
@@ -24,7 +24,7 @@ test.describe('Canvas Right Click Menu', () => {
     await expect(comfyPage.canvas).toHaveScreenshot('add-group-group-added.png')
   })
 
-  test('Can convert to group node', async ({ comfyPage }) => {
+  test.skip('Can convert to group node', async ({ comfyPage }) => {
     await comfyPage.select2Nodes()
     await expect(comfyPage.canvas).toHaveScreenshot('selected-2-nodes.png')
     await comfyPage.rightClickCanvas()
diff --git a/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-menu-chromium-linux.png b/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-menu-chromium-linux.png
index 49926184b..0f4a61be1 100644
Binary files a/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-menu-chromium-linux.png and b/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-menu-chromium-linux.png differ
diff --git a/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-node-chromium-linux.png b/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-node-chromium-linux.png
index 1ebee0fd6..8e45bd459 100644
Binary files a/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-node-chromium-linux.png and b/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-node-chromium-linux.png differ
diff --git a/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-pinned-node-chromium-linux.png b/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-pinned-node-chromium-linux.png
index acf5ee2d4..3091e82b4 100644
Binary files a/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-pinned-node-chromium-linux.png and b/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-pinned-node-chromium-linux.png differ
diff --git a/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-unpinned-node-chromium-linux.png b/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-unpinned-node-chromium-linux.png
index 1ebee0fd6..8e45bd459 100644
Binary files a/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-unpinned-node-chromium-linux.png and b/browser_tests/tests/rightClickMenu.spec.ts-snapshots/right-click-unpinned-node-chromium-linux.png differ
diff --git a/package-lock.json b/package-lock.json
index a5abcb616..ca4b3c3a3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
         "@alloc/quick-lru": "^5.2.0",
         "@atlaskit/pragmatic-drag-and-drop": "^1.3.1",
         "@comfyorg/comfyui-electron-types": "^0.4.43",
-        "@comfyorg/litegraph": "^0.15.15",
+        "@comfyorg/litegraph": "^0.16.0",
         "@primevue/forms": "^4.2.5",
         "@primevue/themes": "^4.2.5",
         "@sentry/vue": "^8.48.0",
@@ -948,9 +948,9 @@
       "license": "GPL-3.0-only"
     },
     "node_modules/@comfyorg/litegraph": {
-      "version": "0.15.15",
-      "resolved": "https://registry.npmjs.org/@comfyorg/litegraph/-/litegraph-0.15.15.tgz",
-      "integrity": "sha512-otOKgTxNPV6gEa6PW1fHGMMF8twjnZkP0vWQhGsRISK4vN8tPfX8O9sC9Hnq3nV8axaMv4/Ff49+7mMVcFEKeA==",
+      "version": "0.16.0",
+      "resolved": "https://registry.npmjs.org/@comfyorg/litegraph/-/litegraph-0.16.0.tgz",
+      "integrity": "sha512-67JiZgG7MZtQ+IxeKlm17Cs4XGXXBlKV0unDM0BvgGOZUtqY8V/K6omsyZRrnZeq0iT+muQEDE/CluWaS/wzdw==",
       "license": "MIT"
     },
     "node_modules/@cspotcode/source-map-support": {
diff --git a/package.json b/package.json
index db7b36e14..d80dc1553 100644
--- a/package.json
+++ b/package.json
@@ -76,7 +76,7 @@
     "@alloc/quick-lru": "^5.2.0",
     "@atlaskit/pragmatic-drag-and-drop": "^1.3.1",
     "@comfyorg/comfyui-electron-types": "^0.4.43",
-    "@comfyorg/litegraph": "^0.15.15",
+    "@comfyorg/litegraph": "^0.16.0",
     "@primevue/forms": "^4.2.5",
     "@primevue/themes": "^4.2.5",
     "@sentry/vue": "^8.48.0",
diff --git a/src/components/breadcrumb/SubgraphBreadcrumb.vue b/src/components/breadcrumb/SubgraphBreadcrumb.vue
index 96bdc6c0b..63ee9c269 100644
--- a/src/components/breadcrumb/SubgraphBreadcrumb.vue
+++ b/src/components/breadcrumb/SubgraphBreadcrumb.vue
@@ -1,8 +1,5 @@
 <template>
-  <div
-    v-if="workflowStore.isSubgraphActive"
-    class="fixed top-[var(--comfy-topbar-height)] left-[var(--sidebar-width)] p-2 subgraph-breadcrumb"
-  >
+  <div v-if="workflowStore.isSubgraphActive" class="p-2 subgraph-breadcrumb">
     <Breadcrumb
       class="bg-transparent"
       :home="home"
@@ -14,28 +11,30 @@
 </template>
 
 <script setup lang="ts">
-import { useEventListener, whenever } from '@vueuse/core'
+import { useEventListener } from '@vueuse/core'
 import Breadcrumb from 'primevue/breadcrumb'
 import type { MenuItem, MenuItemCommandEvent } from 'primevue/menuitem'
 import { computed } from 'vue'
 
-import { useWorkflowService } from '@/services/workflowService'
 import { useCanvasStore } from '@/stores/graphStore'
+import { useSubgraphNavigationStore } from '@/stores/subgraphNavigationStore'
 import { useWorkflowStore } from '@/stores/workflowStore'
 
-const workflowService = useWorkflowService()
 const workflowStore = useWorkflowStore()
+const navigationStore = useSubgraphNavigationStore()
 
 const workflowName = computed(() => workflowStore.activeWorkflow?.filename)
 
 const items = computed(() => {
-  if (!workflowStore.subgraphNamePath.length) return []
+  if (!navigationStore.navigationStack.length) return []
 
-  return workflowStore.subgraphNamePath.map<MenuItem>((name) => ({
-    label: name,
-    command: async () => {
-      const workflow = workflowStore.getWorkflowByPath(name)
-      if (workflow) await workflowService.openWorkflow(workflow)
+  return navigationStore.navigationStack.map<MenuItem>((subgraph) => ({
+    label: subgraph.name,
+    command: () => {
+      const canvas = useCanvasStore().getCanvas()
+      if (!canvas.graph) throw new TypeError('Canvas has no graph')
+
+      canvas.setGraph(subgraph)
     }
   }))
 })
@@ -43,7 +42,7 @@ const items = computed(() => {
 const home = computed(() => ({
   label: workflowName.value,
   icon: 'pi pi-home',
-  command: async () => {
+  command: () => {
     const canvas = useCanvasStore().getCanvas()
     if (!canvas.graph) throw new TypeError('Canvas has no graph')
 
@@ -55,22 +54,32 @@ const handleItemClick = (event: MenuItemCommandEvent) => {
   event.item.command?.(event)
 }
 
-whenever(
-  () => useCanvasStore().canvas,
-  (canvas) => {
-    useEventListener(canvas.canvas, 'litegraph:set-graph', () => {
-      useWorkflowStore().updateActiveGraph()
-    })
+// Escape exits from the current subgraph.
+useEventListener(document, 'keydown', (event) => {
+  if (event.key === 'Escape') {
+    const canvas = useCanvasStore().getCanvas()
+    if (!canvas.graph) throw new TypeError('Canvas has no graph')
+
+    canvas.setGraph(
+      navigationStore.navigationStack.at(-2) ?? canvas.graph.rootGraph
+    )
   }
-)
+})
 </script>
 
 <style>
 .subgraph-breadcrumb {
   .p-breadcrumb-item-link,
   .p-breadcrumb-item-icon {
+    @apply select-none;
+
     color: #d26565;
-    user-select: none;
+    text-shadow:
+      1px 1px 0 #000,
+      -1px -1px 0 #000,
+      1px -1px 0 #000,
+      -1px 1px 0 #000,
+      0 0 0.375rem #000;
   }
 }
 </style>
diff --git a/src/components/graph/DomWidgets.vue b/src/components/graph/DomWidgets.vue
index 468b90673..9f7117e00 100644
--- a/src/components/graph/DomWidgets.vue
+++ b/src/components/graph/DomWidgets.vue
@@ -21,16 +21,14 @@ import { useDomWidgetStore } from '@/stores/domWidgetStore'
 import { useCanvasStore } from '@/stores/graphStore'
 
 const domWidgetStore = useDomWidgetStore()
-const widgetStates = computed(() =>
-  Array.from(domWidgetStore.widgetStates.values())
-)
+const widgetStates = computed(() => domWidgetStore.activeWidgetStates)
 
 const updateWidgets = () => {
   const lgCanvas = canvasStore.canvas
   if (!lgCanvas) return
 
   const lowQuality = lgCanvas.low_quality
-  for (const widgetState of domWidgetStore.widgetStates.values()) {
+  for (const widgetState of widgetStates.value) {
     const widget = widgetState.widget
     const node = widget.node as LGraphNode
 
diff --git a/src/components/graph/GraphCanvas.vue b/src/components/graph/GraphCanvas.vue
index 1c1ecef20..8ef41fb34 100644
--- a/src/components/graph/GraphCanvas.vue
+++ b/src/components/graph/GraphCanvas.vue
@@ -12,10 +12,12 @@
       <BottomPanel />
     </template>
     <template #graph-canvas-panel>
-      <SecondRowWorkflowTabs
-        v-if="workflowTabsPosition === 'Topbar (2nd-row)'"
-        class="pointer-events-auto"
-      />
+      <div class="absolute top-0 left-0 w-auto max-w-full pointer-events-auto">
+        <SecondRowWorkflowTabs
+          v-if="workflowTabsPosition === 'Topbar (2nd-row)'"
+        />
+        <SubgraphBreadcrumb />
+      </div>
       <GraphCanvasMenu v-if="canvasMenuEnabled" class="pointer-events-auto" />
     </template>
   </LiteGraphCanvasSplitterOverlay>
@@ -39,12 +41,11 @@
     </SelectionOverlay>
     <DomWidgets />
   </template>
-  <SubgraphBreadcrumb />
 </template>
 
 <script setup lang="ts">
 import type { LGraphNode } from '@comfyorg/litegraph'
-import { useEventListener } from '@vueuse/core'
+import { useEventListener, whenever } from '@vueuse/core'
 import { computed, onMounted, ref, watch, watchEffect } from 'vue'
 
 import LiteGraphCanvasSplitterOverlay from '@/components/LiteGraphCanvasSplitterOverlay.vue'
@@ -84,6 +85,7 @@ import { useCanvasStore } from '@/stores/graphStore'
 import { useNodeDefStore } from '@/stores/nodeDefStore'
 import { useSettingStore } from '@/stores/settingStore'
 import { useToastStore } from '@/stores/toastStore'
+import { useWorkflowStore } from '@/stores/workflowStore'
 import { useColorPaletteStore } from '@/stores/workspace/colorPaletteStore'
 import { useWorkspaceStore } from '@/stores/workspaceStore'
 
@@ -192,10 +194,10 @@ watch(
 // Update the progress of the executing node
 watch(
   () =>
-    [executionStore.executingNodeId, executionStore.executingNodeProgress] as [
-      NodeId | null,
-      number | null
-    ],
+    [
+      executionStore.executingNodeId,
+      executionStore.executingNodeProgress
+    ] satisfies [NodeId | null, number | null],
   ([executingNodeId, executingNodeProgress]) => {
     for (const node of comfyApp.graph.nodes) {
       if (node.id == executingNodeId) {
@@ -339,6 +341,16 @@ onMounted(async () => {
     }
   )
 
+  whenever(
+    () => useCanvasStore().canvas,
+    (canvas) => {
+      useEventListener(canvas.canvas, 'litegraph:set-graph', () => {
+        useWorkflowStore().updateActiveGraph()
+      })
+    },
+    { immediate: true }
+  )
+
   emit('ready')
 })
 </script>
diff --git a/src/components/graph/SelectionToolbox.vue b/src/components/graph/SelectionToolbox.vue
index 5caa3bee7..3b316b06b 100644
--- a/src/components/graph/SelectionToolbox.vue
+++ b/src/components/graph/SelectionToolbox.vue
@@ -12,6 +12,7 @@
     <PinButton />
     <EditModelButton />
     <MaskEditorButton />
+    <ConvertToSubgraphButton />
     <DeleteButton />
     <RefreshButton />
     <ExtensionCommandButton
@@ -29,6 +30,7 @@ import { computed } from 'vue'
 
 import BypassButton from '@/components/graph/selectionToolbox/BypassButton.vue'
 import ColorPickerButton from '@/components/graph/selectionToolbox/ColorPickerButton.vue'
+import ConvertToSubgraphButton from '@/components/graph/selectionToolbox/ConvertToSubgraphButton.vue'
 import DeleteButton from '@/components/graph/selectionToolbox/DeleteButton.vue'
 import EditModelButton from '@/components/graph/selectionToolbox/EditModelButton.vue'
 import ExecuteButton from '@/components/graph/selectionToolbox/ExecuteButton.vue'
diff --git a/src/components/graph/selectionToolbox/ConvertToSubgraphButton.vue b/src/components/graph/selectionToolbox/ConvertToSubgraphButton.vue
new file mode 100644
index 000000000..c86582a60
--- /dev/null
+++ b/src/components/graph/selectionToolbox/ConvertToSubgraphButton.vue
@@ -0,0 +1,34 @@
+<template>
+  <Button
+    v-show="isVisible"
+    v-tooltip.top="{
+      value: t('commands.Comfy_Graph_ConvertToSubgraph.label'),
+      showDelay: 1000
+    }"
+    severity="secondary"
+    text
+    icon="pi pi-box"
+    @click="() => commandStore.execute('Comfy.Graph.ConvertToSubgraph')"
+  />
+</template>
+
+<script setup lang="ts">
+import Button from 'primevue/button'
+import { computed } from 'vue'
+import { useI18n } from 'vue-i18n'
+
+import { useCommandStore } from '@/stores/commandStore'
+import { useCanvasStore } from '@/stores/graphStore'
+
+const { t } = useI18n()
+const commandStore = useCommandStore()
+const canvasStore = useCanvasStore()
+
+const isVisible = computed(() => {
+  return (
+    canvasStore.groupSelected ||
+    canvasStore.rerouteSelected ||
+    canvasStore.nodeSelected
+  )
+})
+</script>
diff --git a/src/components/graph/selectionToolbox/DeleteButton.vue b/src/components/graph/selectionToolbox/DeleteButton.vue
index d0787e57b..7c341614e 100644
--- a/src/components/graph/selectionToolbox/DeleteButton.vue
+++ b/src/components/graph/selectionToolbox/DeleteButton.vue
@@ -1,5 +1,6 @@
 <template>
   <Button
+    v-show="isDeletable"
     v-tooltip.top="{
       value: t('commands.Comfy_Canvas_DeleteSelectedItems.label'),
       showDelay: 1000
@@ -13,10 +14,17 @@
 
 <script setup lang="ts">
 import Button from 'primevue/button'
+import { computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import { useCommandStore } from '@/stores/commandStore'
+import { useCanvasStore } from '@/stores/graphStore'
 
 const { t } = useI18n()
 const commandStore = useCommandStore()
+const canvasStore = useCanvasStore()
+
+const isDeletable = computed(() =>
+  canvasStore.selectedItems.some((x) => x.removable !== false)
+)
 </script>
diff --git a/src/components/graph/selectionToolbox/MaskEditorButton.vue b/src/components/graph/selectionToolbox/MaskEditorButton.vue
index 9336e58bd..e0635ea98 100644
--- a/src/components/graph/selectionToolbox/MaskEditorButton.vue
+++ b/src/components/graph/selectionToolbox/MaskEditorButton.vue
@@ -25,8 +25,9 @@ const commandStore = useCommandStore()
 const canvasStore = useCanvasStore()
 
 const isSingleImageNode = computed(() => {
-  const nodes = canvasStore.selectedItems.filter(isLGraphNode)
-  return nodes.length === 1 && nodes.some(isImageNode)
+  const { selectedItems } = canvasStore
+  const item = selectedItems[0]
+  return selectedItems.length === 1 && isLGraphNode(item) && isImageNode(item)
 })
 
 const openMaskEditor = () => {
diff --git a/src/components/searchbox/NodeSearchBoxPopover.vue b/src/components/searchbox/NodeSearchBoxPopover.vue
index 47b02d49b..ad4618989 100644
--- a/src/components/searchbox/NodeSearchBoxPopover.vue
+++ b/src/components/searchbox/NodeSearchBoxPopover.vue
@@ -95,12 +95,14 @@ const addNode = (nodeDef: ComfyNodeDefImpl) => {
     return
   }
 
-  disconnectOnReset = false
   const node = litegraphService.addNodeOnGraph(nodeDef, {
     pos: getNewNodeLocation()
   })
 
-  canvasStore.getCanvas().linkConnector.connectToNode(node, triggerEvent)
+  if (disconnectOnReset) {
+    canvasStore.getCanvas().linkConnector.connectToNode(node, triggerEvent)
+  }
+  disconnectOnReset = false
 
   // Notify changeTracker - new step should be added
   useWorkflowStore().activeWorkflow?.changeTracker?.checkState()
diff --git a/src/components/topbar/SecondRowWorkflowTabs.vue b/src/components/topbar/SecondRowWorkflowTabs.vue
index 17db2a0a4..777f4944a 100644
--- a/src/components/topbar/SecondRowWorkflowTabs.vue
+++ b/src/components/topbar/SecondRowWorkflowTabs.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="absolute top-0 left-0 w-auto max-w-full">
+  <div class="w-auto max-w-full">
     <WorkflowTabs />
   </div>
 </template>
diff --git a/src/composables/useCoreCommands.ts b/src/composables/useCoreCommands.ts
index 6b291a208..bef0655cb 100644
--- a/src/composables/useCoreCommands.ts
+++ b/src/composables/useCoreCommands.ts
@@ -19,7 +19,7 @@ import { useDialogService } from '@/services/dialogService'
 import { useLitegraphService } from '@/services/litegraphService'
 import { useWorkflowService } from '@/services/workflowService'
 import type { ComfyCommand } from '@/stores/commandStore'
-import { useTitleEditorStore } from '@/stores/graphStore'
+import { useCanvasStore, useTitleEditorStore } from '@/stores/graphStore'
 import { useQueueSettingsStore, useQueueStore } from '@/stores/queueStore'
 import { useSettingStore } from '@/stores/settingStore'
 import { useToastStore } from '@/stores/toastStore'
@@ -38,6 +38,7 @@ export function useCoreCommands(): ComfyCommand[] {
   const colorPaletteStore = useColorPaletteStore()
   const firebaseAuthActions = useFirebaseAuthActions()
   const toastStore = useToastStore()
+  const canvasStore = useCanvasStore()
   const getTracker = () => workflowStore.activeWorkflow?.changeTracker
 
   const getSelectedNodes = (): LGraphNode[] => {
@@ -730,6 +731,30 @@ export function useCoreCommands(): ComfyCommand[] {
         if (!(node instanceof LGraphNode)) return
         await addFluxKontextGroupNode(node)
       }
+    },
+    {
+      id: 'Comfy.Graph.ConvertToSubgraph',
+      icon: 'pi pi-sitemap',
+      label: 'Convert Selection to Subgraph',
+      versionAdded: '1.20.1',
+      function: () => {
+        const canvas = canvasStore.getCanvas()
+        const graph = canvas.subgraph ?? canvas.graph
+        if (!graph) throw new TypeError('Canvas has no graph or subgraph set.')
+
+        const res = graph.convertToSubgraph(canvas.selectedItems)
+        if (!res) {
+          toastStore.add({
+            severity: 'error',
+            summary: t('toastMessages.cannotCreateSubgraph'),
+            detail: t('toastMessages.failedToConvertToSubgraph'),
+            life: 3000
+          })
+          return
+        }
+        const { node } = res
+        canvas.select(node)
+      }
     }
   ]
 
diff --git a/src/composables/useErrorHandling.ts b/src/composables/useErrorHandling.ts
index 623e6c5e0..607997ac8 100644
--- a/src/composables/useErrorHandling.ts
+++ b/src/composables/useErrorHandling.ts
@@ -9,6 +9,7 @@ export function useErrorHandling() {
       summary: t('g.error'),
       detail: error instanceof Error ? error.message : t('g.unknownError')
     })
+    console.error(error)
   }
 
   const wrapWithErrorHandling =
diff --git a/src/constants/coreKeybindings.ts b/src/constants/coreKeybindings.ts
index 0d59173aa..34f2cc39e 100644
--- a/src/constants/coreKeybindings.ts
+++ b/src/constants/coreKeybindings.ts
@@ -173,5 +173,13 @@ export const CORE_KEYBINDINGS: Keybinding[] = [
       key: 'f'
     },
     commandId: 'Workspace.ToggleFocusMode'
+  },
+  {
+    combo: {
+      key: 'e',
+      ctrl: true,
+      shift: true
+    },
+    commandId: 'Comfy.Graph.ConvertToSubgraph'
   }
 ]
diff --git a/src/extensions/core/groupNode.ts b/src/extensions/core/groupNode.ts
index ef48e05c3..ccc973390 100644
--- a/src/extensions/core/groupNode.ts
+++ b/src/extensions/core/groupNode.ts
@@ -1,4 +1,4 @@
-import { LGraphCanvas, LiteGraph } from '@comfyorg/litegraph'
+import { LiteGraph } from '@comfyorg/litegraph'
 import { LGraphNode, type NodeId } from '@comfyorg/litegraph/dist/LGraphNode'
 
 import { t } from '@/i18n'
@@ -1583,57 +1583,6 @@ export class GroupNodeHandler {
   }
 }
 
-function addConvertToGroupOptions() {
-  // @ts-expect-error fixme ts strict error
-  function addConvertOption(options, index) {
-    const selected = Object.values(app.canvas.selected_nodes ?? {})
-    const disabled =
-      selected.length < 2 ||
-      selected.find((n) => GroupNodeHandler.isGroupNode(n))
-    options.splice(index, null, {
-      content: `Convert to Group Node`,
-      disabled,
-      callback: convertSelectedNodesToGroupNode
-    })
-  }
-
-  // @ts-expect-error fixme ts strict error
-  function addManageOption(options, index) {
-    const groups = app.graph.extra?.groupNodes
-    const disabled = !groups || !Object.keys(groups).length
-    options.splice(index, null, {
-      content: `Manage Group Nodes`,
-      disabled,
-      callback: () => manageGroupNodes()
-    })
-  }
-
-  // Add to canvas
-  const getCanvasMenuOptions = LGraphCanvas.prototype.getCanvasMenuOptions
-  LGraphCanvas.prototype.getCanvasMenuOptions = function () {
-    // @ts-expect-error fixme ts strict error
-    const options = getCanvasMenuOptions.apply(this, arguments)
-    const index = options.findIndex((o) => o?.content === 'Add Group')
-    const insertAt = index === -1 ? options.length - 1 : index + 2
-    addConvertOption(options, insertAt)
-    addManageOption(options, insertAt + 1)
-    return options
-  }
-
-  // Add to nodes
-  const getNodeMenuOptions = LGraphCanvas.prototype.getNodeMenuOptions
-  LGraphCanvas.prototype.getNodeMenuOptions = function (node) {
-    // @ts-expect-error fixme ts strict error
-    const options = getNodeMenuOptions.apply(this, arguments)
-    if (!GroupNodeHandler.isGroupNode(node)) {
-      const index = options.findIndex((o) => o?.content === 'Properties')
-      const insertAt = index === -1 ? options.length - 1 : index
-      addConvertOption(options, insertAt)
-    }
-    return options
-  }
-}
-
 const replaceLegacySeparators = (nodes: ComfyNode[]): void => {
   for (const node of nodes) {
     if (typeof node.type === 'string' && node.type.startsWith('workflow/')) {
@@ -1723,9 +1672,6 @@ const ext: ComfyExtension = {
       }
     }
   ],
-  setup() {
-    addConvertToGroupOptions()
-  },
   async beforeConfigureGraph(
     graphData: ComfyWorkflowJSON,
     missingNodeTypes: string[]
diff --git a/src/locales/en/commands.json b/src/locales/en/commands.json
index ed92a6439..780ec7164 100644
--- a/src/locales/en/commands.json
+++ b/src/locales/en/commands.json
@@ -113,6 +113,9 @@
   "Comfy_Feedback": {
     "label": "Give Feedback"
   },
+  "Comfy_Graph_ConvertToSubgraph": {
+    "label": "Convert Selection to Subgraph"
+  },
   "Comfy_Graph_FitGroupToContents": {
     "label": "Fit Group To Contents"
   },
diff --git a/src/locales/en/main.json b/src/locales/en/main.json
index 8844164fa..d0dd7b859 100644
--- a/src/locales/en/main.json
+++ b/src/locales/en/main.json
@@ -839,6 +839,7 @@
     "Export": "Export",
     "Export (API)": "Export (API)",
     "Give Feedback": "Give Feedback",
+    "Convert Selection to Subgraph": "Convert Selection to Subgraph",
     "Fit Group To Contents": "Fit Group To Contents",
     "Group Selected Nodes": "Group Selected Nodes",
     "Convert selected nodes to group node": "Convert selected nodes to group node",
@@ -1324,7 +1325,9 @@
     "failedToPurchaseCredits": "Failed to purchase credits: {error}",
     "unauthorizedDomain": "Your domain {domain} is not authorized to use this service. Please contact {email} to add your domain to the whitelist.",
     "useApiKeyTip": "Tip: Can't access normal login? Use the Comfy API Key option.",
-    "nothingSelected": "Nothing selected"
+    "nothingSelected": "Nothing selected",
+    "cannotCreateSubgraph": "Cannot create subgraph",
+    "failedToConvertToSubgraph": "Failed to convert items to subgraph"
   },
   "auth": {
     "apiKey": {
diff --git a/src/locales/es/commands.json b/src/locales/es/commands.json
index c25a1cfc0..0160c9814 100644
--- a/src/locales/es/commands.json
+++ b/src/locales/es/commands.json
@@ -113,6 +113,9 @@
   "Comfy_Feedback": {
     "label": "Dar retroalimentación"
   },
+  "Comfy_Graph_ConvertToSubgraph": {
+    "label": "Convertir selección en subgrafo"
+  },
   "Comfy_Graph_FitGroupToContents": {
     "label": "Ajustar grupo al contenido"
   },
diff --git a/src/locales/es/main.json b/src/locales/es/main.json
index 89cbc07e3..ee48cf340 100644
--- a/src/locales/es/main.json
+++ b/src/locales/es/main.json
@@ -714,6 +714,7 @@
     "ComfyUI Forum": "Foro de ComfyUI",
     "ComfyUI Issues": "Problemas de ComfyUI",
     "Contact Support": "Contactar soporte",
+    "Convert Selection to Subgraph": "Convertir selección en subgrafo",
     "Convert selected nodes to group node": "Convertir nodos seleccionados en nodo de grupo",
     "Delete Selected Items": "Eliminar elementos seleccionados",
     "Desktop User Guide": "Guía de usuario de escritorio",
@@ -1389,6 +1390,7 @@
     "title": "Comienza con una Plantilla"
   },
   "toastMessages": {
+    "cannotCreateSubgraph": "No se puede crear el subgrafo",
     "couldNotDetermineFileType": "No se pudo determinar el tipo de archivo",
     "dropFileError": "No se puede procesar el elemento soltado: {error}",
     "emptyCanvas": "Lienzo vacío",
@@ -1397,6 +1399,7 @@
     "errorSaveSetting": "Error al guardar la configuración {id}: {err}",
     "failedToAccessBillingPortal": "No se pudo acceder al portal de facturación: {error}",
     "failedToApplyTexture": "Error al aplicar textura",
+    "failedToConvertToSubgraph": "No se pudo convertir los elementos en subgrafo",
     "failedToCreateCustomer": "No se pudo crear el cliente: {error}",
     "failedToDownloadFile": "Error al descargar el archivo",
     "failedToExportModel": "Error al exportar modelo como {format}",
diff --git a/src/locales/fr/commands.json b/src/locales/fr/commands.json
index d1f121b05..e1595c471 100644
--- a/src/locales/fr/commands.json
+++ b/src/locales/fr/commands.json
@@ -113,6 +113,9 @@
   "Comfy_Feedback": {
     "label": "Retour d'information"
   },
+  "Comfy_Graph_ConvertToSubgraph": {
+    "label": "Convertir la sélection en sous-graphe"
+  },
   "Comfy_Graph_FitGroupToContents": {
     "label": "Ajuster le groupe au contenu"
   },
diff --git a/src/locales/fr/main.json b/src/locales/fr/main.json
index 8f3c16496..715b22878 100644
--- a/src/locales/fr/main.json
+++ b/src/locales/fr/main.json
@@ -714,6 +714,7 @@
     "ComfyUI Forum": "Forum ComfyUI",
     "ComfyUI Issues": "Problèmes de ComfyUI",
     "Contact Support": "Contacter le support",
+    "Convert Selection to Subgraph": "Convertir la sélection en sous-graphe",
     "Convert selected nodes to group node": "Convertir les nœuds sélectionnés en nœud de groupe",
     "Delete Selected Items": "Supprimer les éléments sélectionnés",
     "Desktop User Guide": "Guide de l'utilisateur de bureau",
@@ -1389,6 +1390,7 @@
     "title": "Commencez avec un modèle"
   },
   "toastMessages": {
+    "cannotCreateSubgraph": "Impossible de créer le sous-graphe",
     "couldNotDetermineFileType": "Impossible de déterminer le type de fichier",
     "dropFileError": "Impossible de traiter l'élément déposé : {error}",
     "emptyCanvas": "Toile vide",
@@ -1397,6 +1399,7 @@
     "errorSaveSetting": "Erreur lors de l'enregistrement du paramètre {id}: {err}",
     "failedToAccessBillingPortal": "Échec de l'accès au portail de facturation : {error}",
     "failedToApplyTexture": "Échec de l'application de la texture",
+    "failedToConvertToSubgraph": "Échec de la conversion des éléments en sous-graphe",
     "failedToCreateCustomer": "Échec de la création du client : {error}",
     "failedToDownloadFile": "Échec du téléchargement du fichier",
     "failedToExportModel": "Échec de l'exportation du modèle en {format}",
diff --git a/src/locales/ja/commands.json b/src/locales/ja/commands.json
index c457d0e39..3ee56580e 100644
--- a/src/locales/ja/commands.json
+++ b/src/locales/ja/commands.json
@@ -113,6 +113,9 @@
   "Comfy_Feedback": {
     "label": "フィードバック"
   },
+  "Comfy_Graph_ConvertToSubgraph": {
+    "label": "選択範囲をサブグラフに変換"
+  },
   "Comfy_Graph_FitGroupToContents": {
     "label": "グループを内容に合わせて調整"
   },
diff --git a/src/locales/ja/main.json b/src/locales/ja/main.json
index 184ba829b..ad0e781c5 100644
--- a/src/locales/ja/main.json
+++ b/src/locales/ja/main.json
@@ -714,6 +714,7 @@
     "ComfyUI Forum": "ComfyUI フォーラム",
     "ComfyUI Issues": "ComfyUIの問題",
     "Contact Support": "サポートに連絡",
+    "Convert Selection to Subgraph": "選択範囲をサブグラフに変換",
     "Convert selected nodes to group node": "選択したノードをグループノードに変換",
     "Delete Selected Items": "選択したアイテムを削除",
     "Desktop User Guide": "デスクトップユーザーガイド",
@@ -1389,6 +1390,7 @@
     "title": "テンプレートを利用して開始"
   },
   "toastMessages": {
+    "cannotCreateSubgraph": "サブグラフを作成できません",
     "couldNotDetermineFileType": "ファイルタイプを判断できませんでした",
     "dropFileError": "ドロップされたアイテムを処理できません: {error}",
     "emptyCanvas": "キャンバスが空です",
@@ -1397,6 +1399,7 @@
     "errorSaveSetting": "設定{id}の保存エラー: {err}",
     "failedToAccessBillingPortal": "請求ポータルへのアクセスに失敗しました: {error}",
     "failedToApplyTexture": "テクスチャの適用に失敗しました",
+    "failedToConvertToSubgraph": "アイテムをサブグラフに変換できませんでした",
     "failedToCreateCustomer": "顧客の作成に失敗しました: {error}",
     "failedToDownloadFile": "ファイルのダウンロードに失敗しました",
     "failedToExportModel": "{format}としてモデルのエクスポートに失敗しました",
diff --git a/src/locales/ko/commands.json b/src/locales/ko/commands.json
index 35ff29d6e..becb3f560 100644
--- a/src/locales/ko/commands.json
+++ b/src/locales/ko/commands.json
@@ -113,6 +113,9 @@
   "Comfy_Feedback": {
     "label": "피드백"
   },
+  "Comfy_Graph_ConvertToSubgraph": {
+    "label": "선택 영역을 서브그래프로 변환"
+  },
   "Comfy_Graph_FitGroupToContents": {
     "label": "그룹을 내용에 맞게 맞추기"
   },
diff --git a/src/locales/ko/main.json b/src/locales/ko/main.json
index 8247b6c2e..a6c3dfe36 100644
--- a/src/locales/ko/main.json
+++ b/src/locales/ko/main.json
@@ -714,6 +714,7 @@
     "ComfyUI Forum": "ComfyUI 포럼",
     "ComfyUI Issues": "ComfyUI 이슈 페이지",
     "Contact Support": "고객 지원 문의",
+    "Convert Selection to Subgraph": "선택 영역을 서브그래프로 변환",
     "Convert selected nodes to group node": "선택한 노드를 그룹 노드로 변환",
     "Delete Selected Items": "선택한 항목 삭제",
     "Desktop User Guide": "데스크톱 사용자 가이드",
@@ -1389,6 +1390,7 @@
     "title": "템플릿으로 시작하기"
   },
   "toastMessages": {
+    "cannotCreateSubgraph": "서브그래프를 생성할 수 없습니다",
     "couldNotDetermineFileType": "파일 유형을 결정할 수 없습니다",
     "dropFileError": "드롭된 항목을 처리할 수 없습니다: {error}",
     "emptyCanvas": "빈 캔버스",
@@ -1397,6 +1399,7 @@
     "errorSaveSetting": "설정 {id} 저장 오류: {err}",
     "failedToAccessBillingPortal": "결제 포털에 접근하지 못했습니다: {error}",
     "failedToApplyTexture": "텍스처 적용에 실패했습니다",
+    "failedToConvertToSubgraph": "항목을 서브그래프로 변환하지 못했습니다",
     "failedToCreateCustomer": "고객 생성에 실패했습니다: {error}",
     "failedToDownloadFile": "파일 다운로드에 실패했습니다",
     "failedToExportModel": "{format} 형식으로 모델 내보내기에 실패했습니다",
diff --git a/src/locales/ru/commands.json b/src/locales/ru/commands.json
index ca55f56bd..ff3ae1195 100644
--- a/src/locales/ru/commands.json
+++ b/src/locales/ru/commands.json
@@ -113,6 +113,9 @@
   "Comfy_Feedback": {
     "label": "Обратная связь"
   },
+  "Comfy_Graph_ConvertToSubgraph": {
+    "label": "Преобразовать выделенное в подграф"
+  },
   "Comfy_Graph_FitGroupToContents": {
     "label": "Подогнать группу к содержимому"
   },
diff --git a/src/locales/ru/main.json b/src/locales/ru/main.json
index d2b95c7c0..b1176122f 100644
--- a/src/locales/ru/main.json
+++ b/src/locales/ru/main.json
@@ -714,6 +714,7 @@
     "ComfyUI Forum": "Форум ComfyUI",
     "ComfyUI Issues": "Проблемы ComfyUI",
     "Contact Support": "Связаться с поддержкой",
+    "Convert Selection to Subgraph": "Преобразовать выделенное в подграф",
     "Convert selected nodes to group node": "Преобразовать выбранные ноды в групповую ноду",
     "Delete Selected Items": "Удалить выбранные элементы",
     "Desktop User Guide": "Руководство пользователя для настольных ПК",
@@ -1389,6 +1390,7 @@
     "title": "Начните с шаблона"
   },
   "toastMessages": {
+    "cannotCreateSubgraph": "Невозможно создать подграф",
     "couldNotDetermineFileType": "Не удалось определить тип файла",
     "dropFileError": "Не удалось обработать перетаскиваемый элемент: {error}",
     "emptyCanvas": "Пустой холст",
@@ -1397,6 +1399,7 @@
     "errorSaveSetting": "Ошибка сохранения настройки {id}: {err}",
     "failedToAccessBillingPortal": "Не удалось получить доступ к биллинговому порталу: {error}",
     "failedToApplyTexture": "Не удалось применить текстуру",
+    "failedToConvertToSubgraph": "Не удалось преобразовать элементы в подграф",
     "failedToCreateCustomer": "Не удалось создать клиента: {error}",
     "failedToDownloadFile": "Не удалось скачать файл",
     "failedToExportModel": "Не удалось экспортировать модель как {format}",
diff --git a/src/locales/zh/commands.json b/src/locales/zh/commands.json
index f4cf59740..a0dfcc84c 100644
--- a/src/locales/zh/commands.json
+++ b/src/locales/zh/commands.json
@@ -113,6 +113,9 @@
   "Comfy_Feedback": {
     "label": "反馈"
   },
+  "Comfy_Graph_ConvertToSubgraph": {
+    "label": "将选区转换为子图"
+  },
   "Comfy_Graph_FitGroupToContents": {
     "label": "适应节点框到内容"
   },
diff --git a/src/locales/zh/main.json b/src/locales/zh/main.json
index 7dfb0e6e0..fb826f19b 100644
--- a/src/locales/zh/main.json
+++ b/src/locales/zh/main.json
@@ -714,6 +714,7 @@
     "ComfyUI Forum": "ComfyUI 论坛",
     "ComfyUI Issues": "ComfyUI 问题",
     "Contact Support": "联系支持",
+    "Convert Selection to Subgraph": "将选中内容转换为子图",
     "Convert selected nodes to group node": "将选中节点转换为组节点",
     "Delete Selected Items": "删除选定的项目",
     "Desktop User Guide": "桌面端用户指南",
@@ -1389,6 +1390,7 @@
     "title": "从模板开始"
   },
   "toastMessages": {
+    "cannotCreateSubgraph": "无法创建子图",
     "couldNotDetermineFileType": "无法确定文件类型",
     "dropFileError": "无法处理掉落的项目：{error}",
     "emptyCanvas": "画布为空",
@@ -1397,6 +1399,7 @@
     "errorSaveSetting": "保存设置 {id} 出错：{err}",
     "failedToAccessBillingPortal": "访问账单门户失败：{error}",
     "failedToApplyTexture": "应用纹理失败",
+    "failedToConvertToSubgraph": "无法将项目转换为子图",
     "failedToCreateCustomer": "创建客户失败：{error}",
     "failedToDownloadFile": "文件下载失败",
     "failedToExportModel": "无法将模型导出为 {format}",
diff --git a/src/schemas/comfyWorkflowSchema.ts b/src/schemas/comfyWorkflowSchema.ts
index 71ac093fd..23dd04d01 100644
--- a/src/schemas/comfyWorkflowSchema.ts
+++ b/src/schemas/comfyWorkflowSchema.ts
@@ -41,10 +41,10 @@ const zModelFile = z.object({
 
 const zGraphState = z
   .object({
-    lastGroupid: z.number().optional(),
-    lastNodeId: z.number().optional(),
-    lastLinkId: z.number().optional(),
-    lastRerouteId: z.number().optional()
+    lastGroupId: z.number(),
+    lastNodeId: z.number(),
+    lastLinkId: z.number(),
+    lastRerouteId: z.number()
   })
   .passthrough()
 
@@ -214,6 +214,32 @@ const zComfyNode = z
   })
   .passthrough()
 
+export const zSubgraphIO = zNodeInput.extend({
+  /** Slot ID (internal; never changes once instantiated). */
+  id: z.string().uuid(),
+  /** The data type this slot uses. Unlike nodes, this does not support legacy numeric types. */
+  type: z.string(),
+  /** Links connected to this slot, or `undefined` if not connected. An ouptut slot should only ever have one link. */
+  linkIds: z.array(z.number()).optional()
+})
+
+const zSubgraphInstance = z
+  .object({
+    id: zNodeId,
+    type: z.string().uuid(),
+    pos: zVector2,
+    size: zVector2,
+    flags: zFlags,
+    order: z.number(),
+    mode: z.number(),
+    inputs: z.array(zSubgraphIO).optional(),
+    outputs: z.array(zSubgraphIO).optional(),
+    widgets_values: zWidgetValues.optional(),
+    color: z.string().optional(),
+    bgcolor: z.string().optional()
+  })
+  .passthrough()
+
 const zGroup = z
   .object({
     id: z.number().optional(),
@@ -248,9 +274,22 @@ const zExtra = z
   })
   .passthrough()
 
+export const zGraphDefinitions = z.object({
+  subgraphs: z.lazy(() => z.array(zSubgraphDefinition))
+})
+
+export const zBaseExportableGraph = z.object({
+  /** Unique graph ID.  Automatically generated if not provided. */
+  id: z.string().uuid().optional(),
+  revision: z.number().optional(),
+  config: zConfig.optional().nullable(),
+  /** Details of the appearance and location of subgraphs shown in this graph. Similar to */
+  subgraphs: z.array(zSubgraphInstance).optional()
+})
+
 /** Schema version 0.4 */
-export const zComfyWorkflow = z
-  .object({
+export const zComfyWorkflow = zBaseExportableGraph
+  .extend({
     id: z.string().uuid().optional(),
     revision: z.number().optional(),
     last_node_id: zNodeId,
@@ -262,13 +301,47 @@ export const zComfyWorkflow = z
     config: zConfig.optional().nullable(),
     extra: zExtra.optional().nullable(),
     version: z.number(),
-    models: z.array(zModelFile).optional()
+    models: z.array(zModelFile).optional(),
+    definitions: zGraphDefinitions.optional()
   })
   .passthrough()
 
+/** Required for recursive definition of subgraphs. */
+interface ComfyWorkflow1BaseType {
+  id?: string
+  revision?: number
+  version: 1
+  models?: z.infer<typeof zModelFile>[]
+  state: z.infer<typeof zGraphState>
+}
+
+/** Required for recursive definition of subgraphs w/ZodEffects. */
+interface ComfyWorkflow1BaseInput extends ComfyWorkflow1BaseType {
+  groups?: z.input<typeof zGroup>[]
+  nodes: z.input<typeof zComfyNode>[]
+  links?: z.input<typeof zComfyLinkObject>[]
+  floatingLinks?: z.input<typeof zComfyLinkObject>[]
+  reroutes?: z.input<typeof zReroute>[]
+  definitions?: {
+    subgraphs: SubgraphDefinitionBase<ComfyWorkflow1BaseInput>[]
+  }
+}
+
+/** Required for recursive definition of subgraphs w/ZodEffects. */
+interface ComfyWorkflow1BaseOutput extends ComfyWorkflow1BaseType {
+  groups?: z.output<typeof zGroup>[]
+  nodes: z.output<typeof zComfyNode>[]
+  links?: z.output<typeof zComfyLinkObject>[]
+  floatingLinks?: z.output<typeof zComfyLinkObject>[]
+  reroutes?: z.output<typeof zReroute>[]
+  definitions?: {
+    subgraphs: SubgraphDefinitionBase<ComfyWorkflow1BaseOutput>[]
+  }
+}
+
 /** Schema version 1 */
-export const zComfyWorkflow1 = z
-  .object({
+export const zComfyWorkflow1 = zBaseExportableGraph
+  .extend({
     id: z.string().uuid().optional(),
     revision: z.number().optional(),
     version: z.literal(1),
@@ -280,7 +353,96 @@ export const zComfyWorkflow1 = z
     floatingLinks: z.array(zComfyLinkObject).optional(),
     reroutes: z.array(zReroute).optional(),
     extra: zExtra.optional().nullable(),
-    models: z.array(zModelFile).optional()
+    models: z.array(zModelFile).optional(),
+    definitions: z
+      .object({
+        subgraphs: z.lazy(
+          (): z.ZodArray<
+            z.ZodType<
+              SubgraphDefinitionBase<ComfyWorkflow1BaseOutput>,
+              z.ZodTypeDef,
+              SubgraphDefinitionBase<ComfyWorkflow1BaseInput>
+            >,
+            'many'
+          > => z.array(zSubgraphDefinition)
+        )
+      })
+      .optional()
+  })
+  .passthrough()
+
+export const zExportedSubgraphIONode = z.object({
+  id: zNodeId,
+  bounding: z.tuple([z.number(), z.number(), z.number(), z.number()]),
+  pinned: z.boolean().optional()
+})
+
+export const zExposedWidget = z.object({
+  id: z.string(),
+  name: z.string()
+})
+
+interface SubgraphDefinitionBase<
+  T extends ComfyWorkflow1BaseInput | ComfyWorkflow1BaseOutput
+> {
+  /** Unique graph ID.  Automatically generated if not provided. */
+  id: string
+  revision: number
+  name: string
+
+  inputNode: T extends ComfyWorkflow1BaseInput
+    ? z.input<typeof zExportedSubgraphIONode>
+    : z.output<typeof zExportedSubgraphIONode>
+  outputNode: T extends ComfyWorkflow1BaseInput
+    ? z.input<typeof zExportedSubgraphIONode>
+    : z.output<typeof zExportedSubgraphIONode>
+  /** Ordered list of inputs to the subgraph itself. Similar to a reroute, with the input side in the graph, and the output side in the subgraph. */
+  inputs?: T extends ComfyWorkflow1BaseInput
+    ? z.input<typeof zSubgraphIO>[]
+    : z.output<typeof zSubgraphIO>[]
+  /** Ordered list of outputs from the subgraph itself. Similar to a reroute, with the input side in the subgraph, and the output side in the graph. */
+  outputs?: T extends ComfyWorkflow1BaseInput
+    ? z.input<typeof zSubgraphIO>[]
+    : z.output<typeof zSubgraphIO>[]
+  /** A list of node widgets displayed in the parent graph, on the subgraph object. */
+  widgets?: T extends ComfyWorkflow1BaseInput
+    ? z.input<typeof zExposedWidget>[]
+    : z.output<typeof zExposedWidget>[]
+  definitions?: {
+    subgraphs: SubgraphDefinitionBase<T>[]
+  }
+}
+
+/** A subgraph definition `worfklow.definitions.subgraphs` */
+export const zSubgraphDefinition = zComfyWorkflow1
+  .extend({
+    /** Unique graph ID.  Automatically generated if not provided. */
+    id: z.string().uuid(),
+    revision: z.number(),
+    name: z.string(),
+    inputNode: zExportedSubgraphIONode,
+    outputNode: zExportedSubgraphIONode,
+
+    /** Ordered list of inputs to the subgraph itself. Similar to a reroute, with the input side in the graph, and the output side in the subgraph. */
+    inputs: z.array(zSubgraphIO).optional(),
+    /** Ordered list of outputs from the subgraph itself. Similar to a reroute, with the input side in the subgraph, and the output side in the graph. */
+    outputs: z.array(zSubgraphIO).optional(),
+    /** A list of node widgets displayed in the parent graph, on the subgraph object. */
+    widgets: z.array(zExposedWidget).optional(),
+    definitions: z
+      .object({
+        subgraphs: z.lazy(
+          (): z.ZodArray<
+            z.ZodType<
+              SubgraphDefinitionBase<ComfyWorkflow1BaseInput>,
+              z.ZodTypeDef,
+              SubgraphDefinitionBase<ComfyWorkflow1BaseInput>
+            >,
+            'many'
+          > => zSubgraphDefinition.array()
+        )
+      })
+      .optional()
   })
   .passthrough()
 
diff --git a/src/scripts/app.ts b/src/scripts/app.ts
index bbef80cb4..7744ae757 100644
--- a/src/scripts/app.ts
+++ b/src/scripts/app.ts
@@ -39,9 +39,11 @@ import { getSvgMetadata } from '@/scripts/metadata/svg'
 import { useDialogService } from '@/services/dialogService'
 import { useExtensionService } from '@/services/extensionService'
 import { useLitegraphService } from '@/services/litegraphService'
+import { useSubgraphService } from '@/services/subgraphService'
 import { useWorkflowService } from '@/services/workflowService'
 import { useApiKeyAuthStore } from '@/stores/apiKeyAuthStore'
 import { useCommandStore } from '@/stores/commandStore'
+import { useDomWidgetStore } from '@/stores/domWidgetStore'
 import { useExecutionStore } from '@/stores/executionStore'
 import { useExtensionStore } from '@/stores/extensionStore'
 import { useFirebaseAuthStore } from '@/stores/firebaseAuthStore'
@@ -72,7 +74,6 @@ import { deserialiseAndCreate } from '@/utils/vintageClipboard'
 
 import { type ComfyApi, PromptExecutionError, api } from './api'
 import { defaultGraph } from './defaultGraph'
-import { pruneWidgets } from './domWidget'
 import {
   getFlacMetadata,
   getLatentMetadata,
@@ -717,25 +718,23 @@ export class ComfyApp {
   }
 
   #addAfterConfigureHandler() {
-    const app = this
-    const onConfigure = app.graph.onConfigure
-    app.graph.onConfigure = function (this: LGraph, ...args) {
+    const { graph } = this
+    const { onConfigure } = graph
+    graph.onConfigure = function (...args) {
       fixLinkInputSlots(this)
 
       // Fire callbacks before the onConfigure, this is used by widget inputs to setup the config
-      for (const node of app.graph.nodes) {
+      for (const node of graph.nodes) {
         node.onGraphConfigured?.()
       }
 
       const r = onConfigure?.apply(this, args)
 
       // Fire after onConfigure, used by primitives to generate widget using input nodes config
-      for (const node of app.graph.nodes) {
+      for (const node of graph.nodes) {
         node.onAfterGraphConfigured?.()
       }
 
-      pruneWidgets(this.nodes)
-
       return r
     }
   }
@@ -767,6 +766,21 @@ export class ComfyApp {
 
     this.#graph = new LGraph()
 
+    // Register the subgraph - adds type wrapper for Litegraph's `createNode` factory
+    this.graph.events.addEventListener('subgraph-created', (e) => {
+      try {
+        const { subgraph, data } = e.detail
+        useSubgraphService().registerNewSubgraph(subgraph, data)
+      } catch (err) {
+        console.error('Failed to register subgraph', err)
+        useToastStore().add({
+          severity: 'error',
+          summary: 'Failed to register subgraph',
+          detail: err instanceof Error ? err.message : String(err)
+        })
+      }
+    })
+
     this.#addAfterConfigureHandler()
 
     this.canvas = new LGraphCanvas(canvasEl, this.graph)
@@ -779,6 +793,30 @@ export class ComfyApp {
     LiteGraph.alt_drag_do_clone_nodes = true
     LiteGraph.macGesturesRequireMac = false
 
+    this.canvas.canvas.addEventListener<'litegraph:set-graph'>(
+      'litegraph:set-graph',
+      (e) => {
+        // Assertion: Not yet defined in litegraph.
+        const { newGraph } = e.detail
+
+        const nodeSet = new Set(newGraph.nodes)
+        const widgetStore = useDomWidgetStore()
+
+        // Assertions: UnwrapRef
+        for (const { widget } of widgetStore.activeWidgetStates) {
+          if (!nodeSet.has(widget.node)) {
+            widgetStore.deactivateWidget(widget.id)
+          }
+        }
+
+        for (const { widget } of widgetStore.inactiveWidgetStates) {
+          if (nodeSet.has(widget.node)) {
+            widgetStore.activateWidget(widget.id)
+          }
+        }
+      }
+    )
+
     this.graph.start()
 
     // Ensure the canvas fills the window
@@ -1015,6 +1053,7 @@ export class ComfyApp {
       })
     }
     useWorkflowService().beforeLoadNewGraph()
+    useSubgraphService().loadSubgraphs(graphData)
 
     const missingNodeTypes: MissingNodeType[] = []
     const missingModels: ModelFile[] = []
@@ -1212,6 +1251,9 @@ export class ComfyApp {
           // Allow widgets to run callbacks before a prompt has been queued
           // e.g. random seed before every gen
           executeWidgetsCallback(this.graph.nodes, 'beforeQueued')
+          for (const subgraph of this.graph.subgraphs.values()) {
+            executeWidgetsCallback(subgraph.nodes, 'beforeQueued')
+          }
 
           const p = await this.graphToPrompt(this.graph, { queueNodeIds })
           try {
@@ -1254,9 +1296,13 @@ export class ComfyApp {
           executeWidgetsCallback(
             p.workflow.nodes
               .map((n) => this.graph.getNodeById(n.id))
-              .filter((n) => !!n) as LGraphNode[],
+              .filter((n) => !!n),
             'afterQueued'
           )
+          for (const subgraph of this.graph.subgraphs.values()) {
+            executeWidgetsCallback(subgraph.nodes, 'afterQueued')
+          }
+
           this.canvas.draw(true, true)
           await this.ui.queue.update()
         }
@@ -1652,6 +1698,8 @@ export class ComfyApp {
     const executionStore = useExecutionStore()
     executionStore.lastNodeErrors = null
     executionStore.lastExecutionError = null
+
+    useDomWidgetStore().clear()
   }
 
   clientPosToCanvasPos(pos: Vector2): Vector2 {
diff --git a/src/scripts/changeTracker.ts b/src/scripts/changeTracker.ts
index 30c2f3289..f6a03afd5 100644
--- a/src/scripts/changeTracker.ts
+++ b/src/scripts/changeTracker.ts
@@ -6,6 +6,7 @@ import log from 'loglevel'
 import type { ExecutedWsMessage } from '@/schemas/apiSchema'
 import type { ComfyWorkflowJSON } from '@/schemas/comfyWorkflowSchema'
 import { useExecutionStore } from '@/stores/executionStore'
+import { useSubgraphNavigationStore } from '@/stores/subgraphNavigationStore'
 import { ComfyWorkflow, useWorkflowStore } from '@/stores/workflowStore'
 
 import { api } from './api'
@@ -37,6 +38,10 @@ export class ChangeTracker {
   ds?: { scale: number; offset: [number, number] }
   nodeOutputs?: Record<string, any>
 
+  private subgraphState?: {
+    navigation: string[]
+  }
+
   constructor(
     /**
      * The workflow that this change tracker is tracking
@@ -67,6 +72,8 @@ export class ChangeTracker {
       scale: app.canvas.ds.scale,
       offset: [app.canvas.ds.offset[0], app.canvas.ds.offset[1]]
     }
+    const navigation = useSubgraphNavigationStore().exportState()
+    this.subgraphState = navigation.length ? { navigation } : undefined
   }
 
   restore() {
@@ -77,6 +84,16 @@ export class ChangeTracker {
     if (this.nodeOutputs) {
       app.nodeOutputs = this.nodeOutputs
     }
+    if (this.subgraphState) {
+      const { navigation } = this.subgraphState
+      useSubgraphNavigationStore().restoreState(navigation)
+
+      const activeId = navigation.at(-1)
+      if (activeId) {
+        const subgraph = app.graph.subgraphs.get(activeId)
+        if (subgraph) app.canvas.setGraph(subgraph)
+      }
+    }
   }
 
   updateModified() {
@@ -376,7 +393,14 @@ export class ChangeTracker {
         return false
 
       // Compare other properties normally
-      for (const key of ['links', 'floatingLinks', 'reroutes', 'groups']) {
+      for (const key of [
+        'links',
+        'floatingLinks',
+        'reroutes',
+        'groups',
+        'definitions',
+        'subgraphs'
+      ]) {
         if (!_.isEqual(a[key], b[key])) {
           return false
         }
@@ -392,7 +416,12 @@ export class ChangeTracker {
     function sortGraphNodes(graph: ComfyWorkflowJSON) {
       return {
         links: graph.links,
+        floatingLinks: graph.floatingLinks,
+        reroutes: graph.reroutes,
         groups: graph.groups,
+        extra: graph.extra,
+        definitions: graph.definitions,
+        subgraphs: graph.subgraphs,
         nodes: graph.nodes.sort((a, b) => {
           if (typeof a.id === 'number' && typeof b.id === 'number') {
             return a.id - b.id
diff --git a/src/scripts/domWidget.ts b/src/scripts/domWidget.ts
index 6acfcd95f..9846234fc 100644
--- a/src/scripts/domWidget.ts
+++ b/src/scripts/domWidget.ts
@@ -11,7 +11,7 @@ import type { InputSpec } from '@/schemas/nodeDef/nodeDefSchemaV2'
 import { useDomWidgetStore } from '@/stores/domWidgetStore'
 import { generateUUID } from '@/utils/formatUtil'
 
-export interface BaseDOMWidget<V extends object | string>
+export interface BaseDOMWidget<V extends object | string = object | string>
   extends IBaseWidget<V, string, DOMWidgetOptions<V>> {
   // ICustomWidget properties
   type: string
@@ -330,9 +330,8 @@ LGraphNode.prototype.addDOMWidget = function <
 export const pruneWidgets = (nodes: LGraphNode[]) => {
   const nodeSet = new Set(nodes)
   const domWidgetStore = useDomWidgetStore()
-  for (const widgetState of domWidgetStore.widgetStates.values()) {
-    const widget = widgetState.widget
-    if (!nodeSet.has(widget.node as LGraphNode)) {
+  for (const { widget } of domWidgetStore.widgetStates.values()) {
+    if (!nodeSet.has(widget.node)) {
       domWidgetStore.unregisterWidget(widget.id)
     }
   }
diff --git a/src/services/litegraphService.ts b/src/services/litegraphService.ts
index 256c06723..afd31d83b 100644
--- a/src/services/litegraphService.ts
+++ b/src/services/litegraphService.ts
@@ -1,14 +1,18 @@
 import {
   type IContextMenuValue,
+  LGraphBadge,
   LGraphCanvas,
   LGraphEventMode,
   LGraphNode,
   LiteGraph,
   RenderShape,
+  type Subgraph,
+  SubgraphNode,
   type Vector2,
   createBounds
 } from '@comfyorg/litegraph'
 import type {
+  ExportedSubgraphInstance,
   ISerialisableNodeInput,
   ISerialisableNodeOutput,
   ISerialisedNode
@@ -35,6 +39,7 @@ import { ComfyNodeDefImpl } from '@/stores/nodeDefStore'
 import { useSettingStore } from '@/stores/settingStore'
 import { useToastStore } from '@/stores/toastStore'
 import { useWidgetStore } from '@/stores/widgetStore'
+import { useWorkflowStore } from '@/stores/workflowStore'
 import { normalizeI18nKey } from '@/utils/formatUtil'
 import {
   isImageNode,
@@ -56,6 +61,267 @@ export const useLitegraphService = () => {
   const widgetStore = useWidgetStore()
   const canvasStore = useCanvasStore()
 
+  // TODO: Dedupe `registerNodeDef`; this should remain synchronous.
+  function registerSubgraphNodeDef(
+    nodeDefV1: ComfyNodeDefV1,
+    subgraph: Subgraph,
+    instanceData: ExportedSubgraphInstance
+  ) {
+    const node = class ComfyNode extends SubgraphNode {
+      static comfyClass: string
+      static override title: string
+      static override category: string
+      static nodeData: ComfyNodeDefV1 & ComfyNodeDefV2
+
+      /**
+       * @internal The initial minimum size of the node.
+       */
+      #initialMinSize = { width: 1, height: 1 }
+      /**
+       * @internal The key for the node definition in the i18n file.
+       */
+      get #nodeKey(): string {
+        return `nodeDefs.${normalizeI18nKey(ComfyNode.nodeData.name)}`
+      }
+
+      constructor() {
+        super(app.graph, subgraph, instanceData)
+
+        this.#setupStrokeStyles()
+        this.#addInputs(ComfyNode.nodeData.inputs)
+        this.#addOutputs(ComfyNode.nodeData.outputs)
+        this.#setInitialSize()
+        this.serialize_widgets = true
+        void extensionService.invokeExtensionsAsync('nodeCreated', this)
+        this.badges.push(
+          new LGraphBadge({
+            text: '⇌',
+            fgColor: '#dad0de',
+            bgColor: '#b3b'
+          })
+        )
+      }
+
+      /**
+       * @internal Setup stroke styles for the node under various conditions.
+       */
+      #setupStrokeStyles() {
+        this.strokeStyles['running'] = function (this: LGraphNode) {
+          if (this.id == app.runningNodeId) {
+            return { color: '#0f0' }
+          }
+        }
+        this.strokeStyles['nodeError'] = function (this: LGraphNode) {
+          if (app.lastNodeErrors?.[this.id]?.errors) {
+            return { color: 'red' }
+          }
+        }
+        this.strokeStyles['dragOver'] = function (this: LGraphNode) {
+          if (app.dragOverNode?.id == this.id) {
+            return { color: 'dodgerblue' }
+          }
+        }
+        this.strokeStyles['executionError'] = function (this: LGraphNode) {
+          if (app.lastExecutionError?.node_id == this.id) {
+            return { color: '#f0f', lineWidth: 2 }
+          }
+        }
+      }
+
+      /**
+       * @internal Add input sockets to the node. (No widget)
+       */
+      #addInputSocket(inputSpec: InputSpec) {
+        const inputName = inputSpec.name
+        const nameKey = `${this.#nodeKey}.inputs.${normalizeI18nKey(inputName)}.name`
+        const widgetConstructor = widgetStore.widgets.get(
+          inputSpec.widgetType ?? inputSpec.type
+        )
+        if (widgetConstructor && !inputSpec.forceInput) return
+
+        this.addInput(inputName, inputSpec.type, {
+          shape: inputSpec.isOptional ? RenderShape.HollowCircle : undefined,
+          localized_name: st(nameKey, inputName)
+        })
+      }
+
+      /**
+       * @internal Add a widget to the node. For both primitive types and custom widgets
+       * (unless `socketless`), an input socket is also added.
+       */
+      #addInputWidget(inputSpec: InputSpec) {
+        const widgetInputSpec = { ...inputSpec }
+        if (inputSpec.widgetType) {
+          widgetInputSpec.type = inputSpec.widgetType
+        }
+        const inputName = inputSpec.name
+        const nameKey = `${this.#nodeKey}.inputs.${normalizeI18nKey(inputName)}.name`
+        const widgetConstructor = widgetStore.widgets.get(widgetInputSpec.type)
+        if (!widgetConstructor || inputSpec.forceInput) return
+
+        const {
+          widget,
+          minWidth = 1,
+          minHeight = 1
+        } = widgetConstructor(
+          this,
+          inputName,
+          transformInputSpecV2ToV1(widgetInputSpec),
+          app
+        ) ?? {}
+
+        if (widget) {
+          widget.label = st(nameKey, widget.label ?? inputName)
+          widget.options ??= {}
+          Object.assign(widget.options, {
+            advanced: inputSpec.advanced,
+            hidden: inputSpec.hidden
+          })
+        }
+
+        if (!widget?.options?.socketless) {
+          const inputSpecV1 = transformInputSpecV2ToV1(widgetInputSpec)
+          this.addInput(inputName, inputSpec.type, {
+            shape: inputSpec.isOptional ? RenderShape.HollowCircle : undefined,
+            localized_name: st(nameKey, inputName),
+            widget: { name: inputName, [GET_CONFIG]: () => inputSpecV1 }
+          })
+        }
+
+        this.#initialMinSize.width = Math.max(
+          this.#initialMinSize.width,
+          minWidth
+        )
+        this.#initialMinSize.height = Math.max(
+          this.#initialMinSize.height,
+          minHeight
+        )
+      }
+
+      /**
+       * @internal Add inputs to the node.
+       */
+      #addInputs(inputs: Record<string, InputSpec>) {
+        for (const inputSpec of Object.values(inputs))
+          this.#addInputSocket(inputSpec)
+        for (const inputSpec of Object.values(inputs))
+          this.#addInputWidget(inputSpec)
+      }
+
+      /**
+       * @internal Add outputs to the node.
+       */
+      #addOutputs(outputs: OutputSpec[]) {
+        for (const output of outputs) {
+          const { name, type, is_list } = output
+          const shapeOptions = is_list ? { shape: LiteGraph.GRID_SHAPE } : {}
+          const nameKey = `${this.#nodeKey}.outputs.${output.index}.name`
+          const typeKey = `dataTypes.${normalizeI18nKey(type)}`
+          const outputOptions = {
+            ...shapeOptions,
+            // If the output name is different from the output type, use the output name.
+            // e.g.
+            // - type ("INT"); name ("Positive") => translate name
+            // - type ("FLOAT"); name ("FLOAT") => translate type
+            localized_name:
+              type !== name ? st(nameKey, name) : st(typeKey, name)
+          }
+          this.addOutput(name, type, outputOptions)
+        }
+      }
+
+      /**
+       * @internal Set the initial size of the node.
+       */
+      #setInitialSize() {
+        const s = this.computeSize()
+        // Expand the width a little to fit widget values on screen.
+        const pad =
+          this.widgets?.length &&
+          !useSettingStore().get('LiteGraph.Node.DefaultPadding')
+        s[0] = Math.max(this.#initialMinSize.width, s[0] + (pad ? 60 : 0))
+        s[1] = Math.max(this.#initialMinSize.height, s[1])
+        this.setSize(s)
+      }
+
+      /**
+       * Configure the node from a serialised node. Keep 'name', 'type', 'shape',
+       * and 'localized_name' information from the original node definition.
+       */
+      override configure(data: ISerialisedNode): void {
+        const RESERVED_KEYS = ['name', 'type', 'shape', 'localized_name']
+
+        // Note: input name is unique in a node definition, so we can lookup
+        // input by name.
+        const inputByName = new Map<string, ISerialisableNodeInput>(
+          data.inputs?.map((input) => [input.name, input]) ?? []
+        )
+        // Inputs defined by the node definition.
+        const definedInputNames = new Set(
+          this.inputs.map((input) => input.name)
+        )
+        const definedInputs = this.inputs.map((input) => {
+          const inputData = inputByName.get(input.name)
+          return inputData
+            ? {
+                ...inputData,
+                // Whether the input has associated widget follows the
+                // original node definition.
+                ..._.pick(input, RESERVED_KEYS.concat('widget'))
+              }
+            : input
+        })
+        // Extra inputs that potentially dynamically added by custom js logic.
+        const extraInputs = data.inputs?.filter(
+          (input) => !definedInputNames.has(input.name)
+        )
+        data.inputs = [...definedInputs, ...(extraInputs ?? [])]
+
+        // Note: output name is not unique, so we cannot lookup output by name.
+        // Use index instead.
+        data.outputs = _.zip(this.outputs, data.outputs).map(
+          ([output, outputData]) => {
+            // If there are extra outputs in the serialised node, use them directly.
+            // There are currently custom nodes that dynamically add outputs via
+            // js logic.
+            if (!output) return outputData as ISerialisableNodeOutput
+
+            return outputData
+              ? {
+                  ...outputData,
+                  ..._.pick(output, RESERVED_KEYS)
+                }
+              : output
+          }
+        )
+
+        data.widgets_values = migrateWidgetsValues(
+          ComfyNode.nodeData.inputs,
+          this.widgets ?? [],
+          data.widgets_values ?? []
+        )
+
+        super.configure(data)
+      }
+    }
+
+    addNodeContextMenuHandler(node)
+    addDrawBackgroundHandler(node)
+    addNodeKeyHandler(node)
+    // Note: Some extensions expects node.comfyClass to be set in
+    // `beforeRegisterNodeDef`.
+    node.prototype.comfyClass = nodeDefV1.name
+    node.comfyClass = nodeDefV1.name
+
+    const nodeDef = new ComfyNodeDefImpl(nodeDefV1)
+    node.nodeData = nodeDef
+    LiteGraph.registerNodeType(subgraph.id, node)
+    // Note: Do not following assignments before `LiteGraph.registerNodeType`
+    // because `registerNodeType` will overwrite the assignments.
+    node.category = nodeDef.category
+    node.title = nodeDef.display_name || nodeDef.name
+  }
+
   async function registerNodeDef(nodeId: string, nodeDefV1: ComfyNodeDefV1) {
     const node = class ComfyNode extends LGraphNode {
       static comfyClass: string
@@ -622,8 +888,10 @@ export const useLitegraphService = () => {
       options
     )
 
+    const graph = useWorkflowStore().activeSubgraph ?? app.graph
+
     // @ts-expect-error fixme ts strict error
-    app.graph.add(node)
+    graph.add(node)
     // @ts-expect-error fixme ts strict error
     return node
   }
@@ -665,6 +933,7 @@ export const useLitegraphService = () => {
 
   return {
     registerNodeDef,
+    registerSubgraphNodeDef,
     addNodeOnGraph,
     getCanvasCenter,
     goToNode,
diff --git a/src/services/subgraphService.ts b/src/services/subgraphService.ts
new file mode 100644
index 000000000..ac1cb3d0a
--- /dev/null
+++ b/src/services/subgraphService.ts
@@ -0,0 +1,91 @@
+import {
+  type ExportedSubgraph,
+  type ExportedSubgraphInstance,
+  type Subgraph
+} from '@comfyorg/litegraph'
+
+import type { ComfyWorkflowJSON } from '@/schemas/comfyWorkflowSchema'
+import type { ComfyNodeDef as ComfyNodeDefV1 } from '@/schemas/nodeDefSchema'
+import { app as comfyApp } from '@/scripts/app'
+import { useNodeDefStore } from '@/stores/nodeDefStore'
+
+import { useLitegraphService } from './litegraphService'
+
+export const useSubgraphService = () => {
+  const nodeDefStore = useNodeDefStore()
+
+  /** Loads a single subgraph definition and registers it with the node def store */
+  function registerLitegraphNode(
+    nodeDef: ComfyNodeDefV1,
+    subgraph: Subgraph,
+    exportedSubgraph: ExportedSubgraph
+  ) {
+    const instanceData: ExportedSubgraphInstance = {
+      id: -1,
+      type: exportedSubgraph.id,
+      pos: [0, 0],
+      size: [100, 100],
+      inputs: [],
+      outputs: [],
+      flags: {},
+      order: 0,
+      mode: 0
+    }
+
+    useLitegraphService().registerSubgraphNodeDef(
+      nodeDef,
+      subgraph,
+      instanceData
+    )
+  }
+
+  function createNodeDef(exportedSubgraph: ExportedSubgraph) {
+    const { id, name } = exportedSubgraph
+
+    const nodeDef: ComfyNodeDefV1 = {
+      input: { required: {} },
+      output: [],
+      output_is_list: [],
+      output_name: [],
+      output_tooltips: [],
+      name: id,
+      display_name: name,
+      description: `Subgraph node for ${name}`,
+      category: 'subgraph',
+      output_node: false,
+      python_module: 'nodes'
+    }
+
+    nodeDefStore.addNodeDef(nodeDef)
+    return nodeDef
+  }
+
+  /** Loads all exported subgraph definitions from workflow */
+  function loadSubgraphs(graphData: ComfyWorkflowJSON) {
+    const subgraphs = graphData.definitions?.subgraphs
+    if (!subgraphs) return
+
+    // Assertion: overriding Zod schema
+    for (const subgraphData of subgraphs as ExportedSubgraph[]) {
+      const subgraph =
+        comfyApp.graph.subgraphs.get(subgraphData.id) ??
+        comfyApp.graph.createSubgraph(subgraphData)
+
+      registerNewSubgraph(subgraph, subgraphData)
+    }
+  }
+
+  /** Registers a new subgraph (e.g. user converted from nodes) */
+  function registerNewSubgraph(
+    subgraph: Subgraph,
+    exportedSubgraph: ExportedSubgraph
+  ) {
+    const nodeDef = createNodeDef(exportedSubgraph)
+    registerLitegraphNode(nodeDef, subgraph, exportedSubgraph)
+  }
+
+  return {
+    loadSubgraphs,
+    registerNewSubgraph
+  }
+}
diff --git a/src/services/workflowService.ts b/src/services/workflowService.ts
index 2527d99ef..4fcbd44b5 100644
--- a/src/services/workflowService.ts
+++ b/src/services/workflowService.ts
@@ -7,6 +7,7 @@ import { ComfyWorkflowJSON } from '@/schemas/comfyWorkflowSchema'
 import { app } from '@/scripts/app'
 import { blankGraph, defaultGraph } from '@/scripts/defaultGraph'
 import { downloadBlob } from '@/scripts/utils'
+import { useDomWidgetStore } from '@/stores/domWidgetStore'
 import { useSettingStore } from '@/stores/settingStore'
 import { useToastStore } from '@/stores/toastStore'
 import { ComfyWorkflow, useWorkflowStore } from '@/stores/workflowStore'
@@ -20,6 +21,7 @@ export const useWorkflowService = () => {
   const workflowStore = useWorkflowStore()
   const toastStore = useToastStore()
   const dialogService = useDialogService()
+  const domWidgetStore = useDomWidgetStore()
 
   async function getFilename(defaultName: string): Promise<string | null> {
     if (settingStore.get('Comfy.PromptFilename')) {
@@ -285,11 +287,8 @@ export const useWorkflowService = () => {
    */
   const beforeLoadNewGraph = () => {
     // Use workspaceStore here as it is patched in unit tests.
-    const workflowStore = useWorkspaceStore().workflow
-    const activeWorkflow = workflowStore.activeWorkflow
-    if (activeWorkflow) {
-      activeWorkflow.changeTracker.store()
-    }
+    useWorkspaceStore().workflow.activeWorkflow?.changeTracker?.store()
+    domWidgetStore.clear()
   }
 
   /**
@@ -345,8 +344,7 @@ export const useWorkflowService = () => {
     options: { position?: Vector2 } = {}
   ) => {
     const loadedWorkflow = await workflow.load()
-    const data = loadedWorkflow.initialState
-    const workflowJSON = data
+    const workflowJSON = toRaw(loadedWorkflow.initialState)
     const old = localStorage.getItem('litegrapheditor_clipboard')
     // unknown conversion: ComfyWorkflowJSON is stricter than LiteGraph's
     // serialisation schema.
diff --git a/src/stores/domWidgetStore.ts b/src/stores/domWidgetStore.ts
index e5751416b..d561b5bc5 100644
--- a/src/stores/domWidgetStore.ts
+++ b/src/stores/domWidgetStore.ts
@@ -2,7 +2,7 @@
  * Stores all DOM widgets that are used in the canvas.
  */
 import { defineStore } from 'pinia'
-import { type Raw, markRaw, ref } from 'vue'
+import { type Raw, computed, markRaw, ref } from 'vue'
 
 import type { PositionConfig } from '@/composables/element/useAbsolutePosition'
 import type { BaseDOMWidget } from '@/scripts/domWidget'
@@ -13,11 +13,20 @@ export interface DomWidgetState extends PositionConfig {
   visible: boolean
   readonly: boolean
   zIndex: number
+  /** If the widget belongs to the current graph/subgraph. */
+  active: boolean
 }
 
 export const useDomWidgetStore = defineStore('domWidget', () => {
   const widgetStates = ref<Map<string, DomWidgetState>>(new Map())
 
+  const activeWidgetStates = computed(() =>
+    [...widgetStates.value.values()].filter((state) => state.active)
+  )
+  const inactiveWidgetStates = computed(() =>
+    [...widgetStates.value.values()].filter((state) => !state.active)
+  )
+
   // Register a widget with the store
   const registerWidget = <V extends object | string>(
     widget: BaseDOMWidget<V>
@@ -28,7 +37,8 @@ export const useDomWidgetStore = defineStore('domWidget', () => {
       readonly: false,
       zIndex: 0,
       pos: [0, 0],
-      size: [0, 0]
+      size: [0, 0],
+      active: true
     })
   }
 
@@ -37,9 +47,28 @@ export const useDomWidgetStore = defineStore('domWidget', () => {
     widgetStates.value.delete(widgetId)
   }
 
+  const activateWidget = (widgetId: string) => {
+    const state = widgetStates.value.get(widgetId)
+    if (state) state.active = true
+  }
+
+  const deactivateWidget = (widgetId: string) => {
+    const state = widgetStates.value.get(widgetId)
+    if (state) state.active = false
+  }
+
+  const clear = () => {
+    widgetStates.value.clear()
+  }
+
   return {
     widgetStates,
+    activeWidgetStates,
+    inactiveWidgetStates,
     registerWidget,
-    unregisterWidget
+    unregisterWidget,
+    activateWidget,
+    deactivateWidget,
+    clear
   }
 })
diff --git a/src/stores/executionStore.ts b/src/stores/executionStore.ts
index 1f97d3db2..a8667da0d 100644
--- a/src/stores/executionStore.ts
+++ b/src/stores/executionStore.ts
@@ -1,3 +1,4 @@
+import type { LGraph, Subgraph } from '@comfyorg/litegraph'
 import { defineStore } from 'pinia'
 import { computed, ref } from 'vue'
 
@@ -20,9 +21,9 @@ import type {
   NodeId
 } from '@/schemas/comfyWorkflowSchema'
 import { api } from '@/scripts/api'
-import { app } from '@/scripts/app'
 
-import { ComfyWorkflow } from './workflowStore'
+import { useCanvasStore } from './graphStore'
+import { ComfyWorkflow, useWorkflowStore } from './workflowStore'
 
 export interface QueuedPrompt {
   /**
@@ -37,6 +38,9 @@ export interface QueuedPrompt {
 }
 
 export const useExecutionStore = defineStore('execution', () => {
+  const workflowStore = useWorkflowStore()
+  const canvasStore = useCanvasStore()
+
   const clientId = ref<string | null>(null)
   const activePromptId = ref<string | null>(null)
   const queuedPrompts = ref<Record<NodeId, QueuedPrompt>>({})
@@ -54,12 +58,64 @@ export const useExecutionStore = defineStore('execution', () => {
     if (!canvasState) return null
 
     return (
-      canvasState.nodes.find(
-        (n: ComfyNode) => String(n.id) === executingNodeId.value
-      ) ?? null
+      canvasState.nodes.find((n) => String(n.id) === executingNodeId.value) ??
+      null
     )
   })
 
+  const subgraphNodeIdToSubgraph = (id: string, graph: LGraph | Subgraph) => {
+    const node = graph.getNodeById(id)
+    if (node?.isSubgraphNode()) return node.subgraph
+  }
+
+  /**
+   * Recursively get the subgraph objects for the given subgraph instance IDs
+   * @param currentGraph The current graph
+   * @param subgraphNodeIds The instance IDs
+   * @param subgraphs The subgraphs
+   * @returns The subgraphs that correspond to each of the instance IDs.
+   */
+  const getSubgraphsFromInstanceIds = (
+    currentGraph: LGraph | Subgraph,
+    subgraphNodeIds: string[],
+    subgraphs: Subgraph[] = []
+  ): Subgraph[] => {
+    // Last segment is the node portion; nothing to do.
+    if (subgraphNodeIds.length === 1) return subgraphs
+
+    const currentPart = subgraphNodeIds.shift()
+    if (currentPart === undefined) return subgraphs
+
+    const subgraph = subgraphNodeIdToSubgraph(currentPart, currentGraph)
+    if (!subgraph) throw new Error(`Subgraph not found: ${currentPart}`)
+
+    subgraphs.push(subgraph)
+    return getSubgraphsFromInstanceIds(subgraph, subgraphNodeIds, subgraphs)
+  }
+
+  const executionIdToCurrentId = (id: string) => {
+    const subgraph = workflowStore.activeSubgraph
+
+    // Short-circuit: ID belongs to the parent workflow / no active subgraph
+    if (!id.includes(':')) {
+      return !subgraph ? id : undefined
+    } else if (!subgraph) {
+      return
+    }
+
+    // Parse the hierarchical ID (e.g., "123:456:789")
+    const subgraphNodeIds = id.split(':')
+
+    // If the last subgraph is the active subgraph, return the node ID
+    const subgraphs = getSubgraphsFromInstanceIds(
+      subgraph.rootGraph,
+      subgraphNodeIds
+    )
+    if (subgraphs.at(-1) === subgraph) {
+      return subgraphNodeIds.at(-1)
+    }
+  }
+
   // This is the progress of the currently executing node, if any
   const _executingNodeProgress = ref<ProgressWsMessage | null>(null)
   const executingNodeProgress = computed(() =>
@@ -132,7 +188,7 @@ export const useExecutionStore = defineStore('execution', () => {
     activePrompt.value.nodes[e.detail.node] = true
   }
 
-  function handleExecuting(e: CustomEvent<NodeId | null>) {
+  function handleExecuting(e: CustomEvent<NodeId | null>): void {
     // Clear the current node progress when a new node starts executing
     _executingNodeProgress.value = null
 
@@ -142,12 +198,16 @@ export const useExecutionStore = defineStore('execution', () => {
       // Seems sometimes nodes that are cached fire executing but not executed
       activePrompt.value.nodes[executingNodeId.value] = true
     }
-    executingNodeId.value = e.detail
-    if (executingNodeId.value === null) {
-      if (activePromptId.value) {
-        delete queuedPrompts.value[activePromptId.value]
+    if (typeof e.detail === 'string') {
+      executingNodeId.value = executionIdToCurrentId(e.detail) ?? null
+    } else {
+      executingNodeId.value = e.detail
+      if (executingNodeId.value === null) {
+        if (activePromptId.value) {
+          delete queuedPrompts.value[activePromptId.value]
+        }
+        activePromptId.value = null
       }
-      activePromptId.value = null
     }
   }
 
@@ -168,19 +228,31 @@ export const useExecutionStore = defineStore('execution', () => {
     lastExecutionError.value = e.detail
   }
 
+  function getNodeIdIfExecuting(nodeId: string | number) {
+    const nodeIdStr = String(nodeId)
+    return nodeIdStr.includes(':')
+      ? workflowStore.executionIdToCurrentId(nodeIdStr)
+      : nodeIdStr
+  }
+
   function handleProgressText(e: CustomEvent<ProgressTextWsMessage>) {
     const { nodeId, text } = e.detail
     if (!text || !nodeId) return
 
-    const node = app.graph.getNodeById(nodeId)
+    // Handle hierarchical node IDs for subgraphs
+    const currentId = getNodeIdIfExecuting(nodeId)
+    const node = canvasStore.getCanvas().graph?.getNodeById(currentId)
     if (!node) return
 
     useNodeProgressText().showTextPreview(node, text)
   }
 
   function handleDisplayComponent(e: CustomEvent<DisplayComponentWsMessage>) {
-    const { node_id, component, props = {} } = e.detail
-    const node = app.graph.getNodeById(node_id)
+    const { node_id: nodeId, component, props = {} } = e.detail
+
+    // Handle hierarchical node IDs for subgraphs
+    const currentId = getNodeIdIfExecuting(nodeId)
+    const node = canvasStore.getCanvas().graph?.getNodeById(currentId)
     if (!node) return
 
     if (component === 'ChatHistoryWidget') {
diff --git a/src/stores/graphStore.ts b/src/stores/graphStore.ts
index 8d053dde7..a1e0d0043 100644
--- a/src/stores/graphStore.ts
+++ b/src/stores/graphStore.ts
@@ -3,7 +3,7 @@ import type { Positionable } from '@comfyorg/litegraph/dist/interfaces'
 import { defineStore } from 'pinia'
 import { type Raw, computed, markRaw, ref, shallowRef } from 'vue'
 
-import { isLGraphGroup, isLGraphNode } from '@/utils/litegraphUtil'
+import { isLGraphGroup, isLGraphNode, isReroute } from '@/utils/litegraphUtil'
 
 export const useTitleEditorStore = defineStore('titleEditor', () => {
   const titleEditorTarget = shallowRef<LGraphNode | LGraphGroup | null>(null)
@@ -31,6 +31,7 @@ export const useCanvasStore = defineStore('canvas', () => {
 
   const nodeSelected = computed(() => selectedItems.value.some(isLGraphNode))
   const groupSelected = computed(() => selectedItems.value.some(isLGraphGroup))
+  const rerouteSelected = computed(() => selectedItems.value.some(isReroute))
 
   const getCanvas = () => {
     if (!canvas.value) throw new Error('getCanvas: canvas is null')
@@ -42,6 +43,7 @@ export const useCanvasStore = defineStore('canvas', () => {
     selectedItems,
     nodeSelected,
     groupSelected,
+    rerouteSelected,
     updateSelectedItems,
     getCanvas
   }
diff --git a/src/stores/nodeDefStore.ts b/src/stores/nodeDefStore.ts
index 743df2043..aaa6d000b 100644
--- a/src/stores/nodeDefStore.ts
+++ b/src/stores/nodeDefStore.ts
@@ -306,8 +306,7 @@ export const useNodeDefStore = defineStore('nodeDef', () => {
   }
   function fromLGraphNode(node: LGraphNode): ComfyNodeDefImpl | null {
     // Frontend-only nodes don't have nodeDef
-    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-    // @ts-ignore Optional chaining used in index
+    // @ts-expect-error Optional chaining used in index
     return nodeDefsByName.value[node.constructor?.nodeData?.name] ?? null
   }
 
diff --git a/src/stores/subgraphNavigationStore.ts b/src/stores/subgraphNavigationStore.ts
new file mode 100644
index 000000000..f3e86e2ff
--- /dev/null
+++ b/src/stores/subgraphNavigationStore.ts
@@ -0,0 +1,87 @@
+import type { Subgraph } from '@comfyorg/litegraph'
+import { defineStore } from 'pinia'
+import { computed, shallowReactive, shallowRef, watch } from 'vue'
+
+import { app } from '@/scripts/app'
+import { isNonNullish } from '@/utils/typeGuardUtil'
+
+import { useWorkflowStore } from './workflowStore'
+
+/**
+ * Stores the current subgraph navigation state; a stack representing subgraph
+ * navigation history from the root graph to the subgraph that is currently
+ * open.
+ */
+export const useSubgraphNavigationStore = defineStore(
+  'subgraphNavigation',
+  () => {
+    const workflowStore = useWorkflowStore()
+
+    /** The currently opened subgraph. */
+    const activeSubgraph = shallowRef<Subgraph>()
+
+    /** The stack of subgraph IDs from the root graph to the currently opened subgraph. */
+    const idStack = shallowReactive<string[]>([])
+
+    /**
+     * A stack representing subgraph navigation history from the root graph to
+     * the current opened subgraph.
+     */
+    const navigationStack = computed(() =>
+      idStack.map((id) => app.graph.subgraphs.get(id)).filter(isNonNullish)
+    )
+
+    /**
+     * Restore the navigation stack from a list of subgraph IDs.
+     * @param subgraphIds The list of subgraph IDs to restore the navigation stack from.
+     * @see exportState
+     */
+    const restoreState = (subgraphIds: string[]) => {
+      idStack.length = 0
+      for (const id of subgraphIds) idStack.push(id)
+    }
+
+    /**
+     * Export the navigation stack as a list of subgraph IDs.
+     * @returns The list of subgraph IDs, ending with the currently active subgraph.
+     * @see restoreState
+     */
+    const exportState = () => [...idStack]
+
+    // Reset on workflow change
+    watch(
+      () => workflowStore.activeWorkflow,
+      () => (idStack.length = 0)
+    )
+
+    // Update navigation stack when opened subgraph changes
+    watch(
+      () => workflowStore.activeSubgraph,
+      (subgraph) => {
+        // Navigated back to the root graph
+        if (!subgraph) {
+          idStack.length = 0
+          return
+        }
+
+        const index = idStack.lastIndexOf(subgraph.id)
+        const lastIndex = idStack.length - 1
+
+        if (index === -1) {
+          // Opened a new subgraph
+          idStack.push(subgraph.id)
+        } else if (index !== lastIndex) {
+          // Navigated to a different subgraph
+          idStack.splice(index + 1, lastIndex - index)
+        }
+      }
+    )
+
+    return {
+      activeSubgraph,
+      navigationStack,
+      restoreState,
+      exportState
+    }
+  }
+)
diff --git a/src/stores/workflowStore.ts b/src/stores/workflowStore.ts
index 105eeadb0..6b0044e9a 100644
--- a/src/stores/workflowStore.ts
+++ b/src/stores/workflowStore.ts
@@ -1,6 +1,7 @@
+import type { LGraph, Subgraph } from '@comfyorg/litegraph'
 import _ from 'lodash'
 import { defineStore } from 'pinia'
-import { computed, markRaw, ref, watch } from 'vue'
+import { type Raw, computed, markRaw, ref, shallowRef, watch } from 'vue'
 
 import { ComfyWorkflowJSON } from '@/schemas/comfyWorkflowSchema'
 import { api } from '@/scripts/api'
@@ -156,12 +157,12 @@ export interface WorkflowStore {
   syncWorkflows: (dir?: string) => Promise<void>
   reorderWorkflows: (from: number, to: number) => void
 
-  /** An ordered list of all parent subgraphs, ending with the current subgraph. */
-  subgraphNamePath: string[]
   /** `true` if any subgraph is currently being viewed. */
   isSubgraphActive: boolean
+  activeSubgraph: Subgraph | undefined
   /** Updates the {@link subgraphNamePath} and {@link isSubgraphActive} values. */
   updateActiveGraph: () => void
+  executionIdToCurrentId: (id: string) => any
 }
 
 export const useWorkflowStore = defineStore('workflow', () => {
@@ -427,24 +428,61 @@ export const useWorkflowStore = defineStore('workflow', () => {
     }
   }
 
-  /** @see WorkflowStore.subgraphNamePath */
-  const subgraphNamePath = ref<string[]>([])
   /** @see WorkflowStore.isSubgraphActive */
   const isSubgraphActive = ref(false)
 
+  /** @see WorkflowStore.activeSubgraph */
+  const activeSubgraph = shallowRef<Raw<Subgraph>>()
+
   /** @see WorkflowStore.updateActiveGraph */
   const updateActiveGraph = () => {
+    const subgraph = comfyApp.canvas?.subgraph
+    activeSubgraph.value = subgraph ? markRaw(subgraph) : undefined
     if (!comfyApp.canvas) return
 
-    const { subgraph } = comfyApp.canvas
     isSubgraphActive.value = isSubgraph(subgraph)
+  }
 
-    if (subgraph) {
-      const [, ...pathFromRoot] = subgraph.pathToRootGraph
+  const subgraphNodeIdToSubgraph = (id: string, graph: LGraph | Subgraph) => {
+    const node = graph.getNodeById(id)
+    if (node?.isSubgraphNode()) return node.subgraph
+  }
 
-      subgraphNamePath.value = pathFromRoot.map((graph) => graph.name)
-    } else {
-      subgraphNamePath.value = []
+  const getSubgraphsFromInstanceIds = (
+    currentGraph: LGraph | Subgraph,
+    subgraphNodeIds: string[],
+    subgraphs: Subgraph[] = []
+  ): Subgraph[] => {
+    const currentPart = subgraphNodeIds.shift()
+    if (currentPart === undefined) return subgraphs
+
+    const subgraph = subgraphNodeIdToSubgraph(currentPart, currentGraph)
+    if (subgraph === undefined) throw new Error('Subgraph not found')
+
+    subgraphs.push(subgraph)
+    return getSubgraphsFromInstanceIds(subgraph, subgraphNodeIds, subgraphs)
+  }
+
+  const executionIdToCurrentId = (id: string) => {
+    const subgraph = activeSubgraph.value
+
+    // Short-circuit: ID belongs to the parent workflow / no active subgraph
+    if (!id.includes(':')) {
+      return !subgraph ? id : undefined
+    } else if (!subgraph) {
+      return
+    }
+
+    // Parse the hierarchical ID (e.g., "123:456:789")
+    const subgraphNodeIds = id.split(':')
+
+    // Start from the root graph
+    const { graph } = comfyApp
+
+    // If the last subgraph is the active subgraph, return the node ID
+    const subgraphs = getSubgraphsFromInstanceIds(graph, subgraphNodeIds)
+    if (subgraphs.at(-1) === subgraph) {
+      return subgraphNodeIds.at(-1)
     }
   }
 
@@ -473,9 +511,10 @@ export const useWorkflowStore = defineStore('workflow', () => {
     getWorkflowByPath,
     syncWorkflows,
 
-    subgraphNamePath,
     isSubgraphActive,
-    updateActiveGraph
+    activeSubgraph,
+    updateActiveGraph,
+    executionIdToCurrentId
   }
 }) satisfies () => WorkflowStore
 
diff --git a/src/types/litegraph-augmentation.d.ts b/src/types/litegraph-augmentation.d.ts
index dbdc388f2..624e4ae08 100644
--- a/src/types/litegraph-augmentation.d.ts
+++ b/src/types/litegraph-augmentation.d.ts
@@ -60,6 +60,7 @@ declare module '@comfyorg/litegraph/dist/types/widgets' {
  *  ComfyUI extensions of litegraph
  */
 declare module '@comfyorg/litegraph' {
+  import type { ExecutableLGraphNode } from '@comfyorg/litegraph'
   import type { IBaseWidget } from '@comfyorg/litegraph/dist/types/widgets'
 
   interface LGraphNodeConstructor<T extends LGraphNode = LGraphNode> {
@@ -88,7 +89,10 @@ declare module '@comfyorg/litegraph' {
     /** @deprecated groupNode */
     setInnerNodes?(nodes: LGraphNode[]): void
     /** Originally a group node API. */
-    getInnerNodes?(): LGraphNode[]
+    getInnerNodes?(
+      nodes?: ExecutableLGraphNode[],
+      subgraphs?: WeakSet<LGraphNode>
+    ): ExecutableLGraphNode[]
     /** @deprecated groupNode */
     convertToNodes?(): LGraphNode[]
     recreate?(): Promise<LGraphNode>
diff --git a/src/utils/executionUtil.ts b/src/utils/executionUtil.ts
index a7e169274..3b061aa46 100644
--- a/src/utils/executionUtil.ts
+++ b/src/utils/executionUtil.ts
@@ -1,5 +1,9 @@
 import type { LGraph, NodeId } from '@comfyorg/litegraph'
-import { LGraphEventMode } from '@comfyorg/litegraph'
+import {
+  ExecutableNodeDTO,
+  LGraphEventMode,
+  SubgraphNode
+} from '@comfyorg/litegraph'
 
 import type {
   ComfyApiWorkflow,
@@ -74,20 +78,31 @@ export const graphToPrompt = async (
   workflow.extra ??= {}
   workflow.extra.frontendVersion = __COMFYUI_FRONTEND_VERSION__
 
+  const computedNodeDtos = graph
+    .computeExecutionOrder(false)
+    .map(
+      (node) =>
+        new ExecutableNodeDTO(
+          node,
+          [],
+          node instanceof SubgraphNode ? node : undefined
+        )
+    )
+
   let output: ComfyApiWorkflow = {}
   // Process nodes in order of execution
-  for (const outerNode of graph.computeExecutionOrder(false)) {
-    const skipNode =
+  for (const outerNode of computedNodeDtos) {
+    // Don't serialize muted nodes
+    if (
       outerNode.mode === LGraphEventMode.NEVER ||
       outerNode.mode === LGraphEventMode.BYPASS
-    const innerNodes =
-      !skipNode && outerNode.getInnerNodes
-        ? outerNode.getInnerNodes()
-        : [outerNode]
-    for (const node of innerNodes) {
+    ) {
+      continue
+    }
+
+    for (const node of outerNode.getInnerNodes()) {
       if (
         node.isVirtualNode ||
-        // Don't serialize muted nodes
         node.mode === LGraphEventMode.NEVER ||
         node.mode === LGraphEventMode.BYPASS
       ) {
@@ -120,55 +135,14 @@ export const graphToPrompt = async (
 
       // Store all node links
       for (const [i, input] of node.inputs.entries()) {
-        let parent = node.getInputNode(i)
-        if (!parent) continue
+        const resolvedInput = node.resolveInput(i)
+        if (!resolvedInput) continue
 
-        let link = node.getInputLink(i)
-        while (
-          parent?.mode === LGraphEventMode.BYPASS ||
-          parent?.isVirtualNode
-        ) {
-          if (!link) break
-
-          if (parent.isVirtualNode) {
-            link = parent.getInputLink(link.origin_slot)
-            if (!link) break
-
-            parent = parent.getInputNode(link.target_slot)
-            if (!parent) break
-          } else if (!parent.inputs) {
-            // Maintains existing behaviour if parent.getInputLink is overriden
-            break
-          } else if (parent.mode === LGraphEventMode.BYPASS) {
-            // Bypass nodes by finding first input with matching type
-            const parentInputIndexes = Object.keys(parent.inputs).map(Number)
-            // Prioritise exact slot index
-            const indexes = [link.origin_slot].concat(parentInputIndexes)
-
-            const matchingIndex = indexes.find(
-              (index) => parent?.inputs[index]?.type === input.type
-            )
-            // No input types match
-            if (matchingIndex === undefined) break
-
-            link = parent.getInputLink(matchingIndex)
-            if (link) parent = parent.getInputNode(matchingIndex)
-          }
-        }
-
-        if (link) {
-          if (parent?.updateLink) {
-            // Subgraph node / groupNode callback; deprecated, should be replaced
-            link = parent.updateLink(link)
-          }
-          if (link) {
-            inputs[input.name] = [
-              String(link.origin_id),
-              // @ts-expect-error link.origin_slot is already number.
-              parseInt(link.origin_slot)
-            ]
-          }
-        }
+        inputs[input.name] = [
+          String(resolvedInput.origin_id),
+          // @ts-expect-error link.origin_slot is already number.
+          parseInt(resolvedInput.origin_slot)
+        ]
       }
 
       output[String(node.id)] = {
diff --git a/src/utils/litegraphUtil.ts b/src/utils/litegraphUtil.ts
index c90b61604..738fbd7ca 100644
--- a/src/utils/litegraphUtil.ts
+++ b/src/utils/litegraphUtil.ts
@@ -1,6 +1,10 @@
-import type { ColorOption, LGraph } from '@comfyorg/litegraph'
+import { ColorOption, LGraph, Reroute } from '@comfyorg/litegraph'
 import { LGraphGroup, LGraphNode, isColorable } from '@comfyorg/litegraph'
-import type { ISerialisedGraph } from '@comfyorg/litegraph/dist/types/serialisation'
+import type {
+  ExportedSubgraph,
+  ISerialisableNodeInput,
+  ISerialisedGraph
+} from '@comfyorg/litegraph/dist/types/serialisation'
 import type {
   IBaseWidget,
   IComboWidget
@@ -50,6 +54,10 @@ export const isLGraphGroup = (item: unknown): item is LGraphGroup => {
   return item instanceof LGraphGroup
 }
 
+export const isReroute = (item: unknown): item is Reroute => {
+  return item instanceof Reroute
+}
+
 /**
  * Get the color option of all canvas items if they are all the same.
  * @param items - The items to get the color option of.
@@ -163,12 +171,11 @@ export function fixLinkInputSlots(graph: LGraph) {
  * This should match the serialization format of legacy widget conversion.
  *
  * @param graph - The graph to compress widget input slots for.
+ * @throws If an infinite loop is detected.
  */
 export function compressWidgetInputSlots(graph: ISerialisedGraph) {
   for (const node of graph.nodes) {
-    node.inputs = node.inputs?.filter(
-      (input) => !(input.widget && input.link === null)
-    )
+    node.inputs = node.inputs?.filter(matchesLegacyApi)
 
     for (const [inputIndex, input] of node.inputs?.entries() ?? []) {
       if (input.link) {
@@ -179,4 +186,44 @@ export function compressWidgetInputSlots(graph: ISerialisedGraph) {
       }
     }
   }
+
+  compressSubgraphWidgetInputSlots(graph.definitions?.subgraphs)
+}
+
+function matchesLegacyApi(input: ISerialisableNodeInput) {
+  return !(input.widget && input.link === null)
+}
+
+/**
+ * Duplication to handle the legacy link arrays in the root workflow.
+ * @see compressWidgetInputSlots
+ * @param subgraph The subgraph to compress widget input slots for.
+ */
+function compressSubgraphWidgetInputSlots(
+  subgraphs: ExportedSubgraph[] | undefined,
+  visited = new WeakSet<ExportedSubgraph>()
+) {
+  if (!subgraphs) return
+
+  for (const subgraph of subgraphs) {
+    if (visited.has(subgraph)) throw new Error('Infinite loop detected')
+    visited.add(subgraph)
+
+    if (subgraph.nodes) {
+      for (const node of subgraph.nodes) {
+        node.inputs = node.inputs?.filter(matchesLegacyApi)
+
+        if (!subgraph.links) continue
+
+        for (const [inputIndex, input] of node.inputs?.entries() ?? []) {
+          if (input.link) {
+            const link = subgraph.links.find((link) => link.id === input.link)
+            if (link) link.target_slot = inputIndex
+          }
+        }
+      }
+    }
+
+    compressSubgraphWidgetInputSlots(subgraph.definitions?.subgraphs, visited)
+  }
 }
diff --git a/src/utils/typeGuardUtil.ts b/src/utils/typeGuardUtil.ts
index 7812230c7..c35a9716b 100644
--- a/src/utils/typeGuardUtil.ts
+++ b/src/utils/typeGuardUtil.ts
@@ -21,3 +21,9 @@ export const isAbortError = (
 export const isSubgraph = (
   item: LGraph | Subgraph | undefined | null
 ): item is Subgraph => item?.isRootGraph === false
+
+/**
+ * Check if an item is non-nullish.
+ */
+export const isNonNullish = <T>(item: T | undefined | null): item is T =>
+  item != null
diff --git a/tests-ui/tests/store/workflowStore.test.ts b/tests-ui/tests/store/workflowStore.test.ts
index 096491eb1..4c5668c8f 100644
--- a/tests-ui/tests/store/workflowStore.test.ts
+++ b/tests-ui/tests/store/workflowStore.test.ts
@@ -492,7 +492,7 @@ describe('useWorkflowStore', () => {
       // Assert
       console.debug(store.isSubgraphActive)
       expect(store.isSubgraphActive).toBe(false) // Should default to false
-      expect(store.subgraphNamePath).toEqual([]) // Should default to empty
+      expect(store.activeSubgraph).toBeUndefined() // Should default to empty
     })
 
     it('should correctly update state when the root graph is active', async () => {
@@ -505,7 +505,7 @@ describe('useWorkflowStore', () => {
 
       // Assert: Check store state
       expect(store.isSubgraphActive).toBe(false)
-      expect(store.subgraphNamePath).toEqual([]) // Path is empty for root graph
+      expect(store.activeSubgraph).toBeUndefined()
     })
 
     it('should correctly update state when a subgraph is active', async () => {
@@ -527,10 +527,7 @@ describe('useWorkflowStore', () => {
 
       // Assert: Check store state
       expect(store.isSubgraphActive).toBe(true)
-      expect(store.subgraphNamePath).toEqual([
-        'Level 1 Subgraph',
-        'Level 2 Subgraph'
-      ]) // Path excludes the root
+      expect(store.activeSubgraph).toEqual(mockSubgraph)
     })
 
     it('should update automatically when activeWorkflow changes', async () => {
@@ -548,7 +545,7 @@ describe('useWorkflowStore', () => {
 
       // Verify initial state
       expect(store.isSubgraphActive).toBe(true)
-      expect(store.subgraphNamePath).toEqual(['Initial Subgraph'])
+      expect(store.activeSubgraph).toEqual(initialSubgraph)
 
       // Act: Change the active workflow
       const workflow2 = store.createTemporary('workflow2.json')
@@ -569,7 +566,7 @@ describe('useWorkflowStore', () => {
 
       // Assert: Check that the state was updated by the watcher based on the *new* canvas state
       expect(store.isSubgraphActive).toBe(false) // Should reflect the change to undefined subgraph
-      expect(store.subgraphNamePath).toEqual([]) // Path should be empty for root
+      expect(store.activeSubgraph).toBeUndefined()
     })
   })
 })