diff --git a/src/ai/tools.ts b/src/ai/tools.ts
index 277d7fa65..e1bbe1209 100644
--- a/src/ai/tools.ts
+++ b/src/ai/tools.ts
@@ -1,8 +1,9 @@
 import { valibotSchema } from '@ai-sdk/valibot'
-import { ALL_TOOLS, FigmaAPI, toolsToAI } from '@open-pencil/core'
 import { tool } from 'ai'
 import * as v from 'valibot'
 
+import { ALL_TOOLS, FigmaAPI, toolsToAI } from '@open-pencil/core'
+
 import type { EditorStore } from '@/stores/editor'
 import type { ExportFormat } from '@open-pencil/core'
 
diff --git a/src/components/ColorInput.vue b/src/components/ColorInput.vue
index 9943f824f..364ef031e 100644
--- a/src/components/ColorInput.vue
+++ b/src/components/ColorInput.vue
@@ -1,6 +1,6 @@
 <script setup lang="ts">
 import ColorPicker from './ColorPicker.vue'
-import { colorToHexRaw, parseColor } from '@/engine/color'
+import { colorToHexRaw, parseColor } from '@open-pencil/core'
 
 import type { Color } from '@/types'
 
diff --git a/src/components/HsvColorArea.vue b/src/components/HsvColorArea.vue
index f6e21952d..29f87159e 100644
--- a/src/components/HsvColorArea.vue
+++ b/src/components/HsvColorArea.vue
@@ -14,7 +14,7 @@ import {
   type Color as RekaColor
 } from 'reka-ui'
 
-import { colorToHex } from '@/engine/color'
+import { colorToHex } from '@open-pencil/core'
 
 import type { Color } from '@/types'
 
diff --git a/src/components/VariablesDialog.vue b/src/components/VariablesDialog.vue
index 4e3428d6d..97d422312 100644
--- a/src/components/VariablesDialog.vue
+++ b/src/components/VariablesDialog.vue
@@ -24,9 +24,9 @@ import IconType from '~icons/lucide/type'
 import IconToggleLeft from '~icons/lucide/toggle-left'
 import IconX from '~icons/lucide/x'
 import ColorInput from './ColorInput.vue'
-import { colorToHexRaw, parseColor } from '@/engine/color'
+import { colorToHexRaw, parseColor } from '@open-pencil/core'
 import { useEditorStore } from '@/stores/editor'
-import type { Variable, Color } from '@/engine/scene-graph'
+import type { Variable, Color } from '@open-pencil/core'
 
 const open = defineModel<boolean>('open', { default: false })
 const store = useEditorStore()
diff --git a/src/components/properties/AppearanceSection.vue b/src/components/properties/AppearanceSection.vue
index d86312a00..8de0951e9 100644
--- a/src/components/properties/AppearanceSection.vue
+++ b/src/components/properties/AppearanceSection.vue
@@ -5,7 +5,7 @@ import ScrubInput from '@/components/ScrubInput.vue'
 import { useNodeProps } from '@/composables/use-node-props'
 import { MIXED, useMultiProps } from '@/composables/use-multi-props'
 
-import type { SceneNode } from '@/engine/scene-graph'
+import type { SceneNode } from '@open-pencil/core'
 
 const { store, updateProp, commitProp } = useNodeProps()
 const { node, nodes, isMulti, active, merged, updateAllWithUndo } = useMultiProps()
diff --git a/src/components/properties/ExportSection.vue b/src/components/properties/ExportSection.vue
index 63d3cb1bc..a9f5c8071 100644
--- a/src/components/properties/ExportSection.vue
+++ b/src/components/properties/ExportSection.vue
@@ -4,7 +4,7 @@ import { ref, computed, watch, onUnmounted } from 'vue'
 import AppSelect from '@/components/AppSelect.vue'
 import { useEditorStore } from '@/stores/editor'
 
-import type { ExportFormat } from '@/engine/render-image'
+import type { ExportFormat } from '@open-pencil/core'
 
 const store = useEditorStore()
 
diff --git a/src/components/properties/LayoutSection.vue b/src/components/properties/LayoutSection.vue
index 637c85586..c67991dda 100644
--- a/src/components/properties/LayoutSection.vue
+++ b/src/components/properties/LayoutSection.vue
@@ -5,7 +5,7 @@ import { onClickOutside } from '@vueuse/core'
 import ScrubInput from '@/components/ScrubInput.vue'
 import { useNodeProps } from '@/composables/use-node-props'
 
-import type { SceneNode, LayoutSizing, LayoutAlign, LayoutCounterAlign } from '@/engine/scene-graph'
+import type { SceneNode, LayoutSizing, LayoutAlign, LayoutCounterAlign } from '@open-pencil/core'
 
 const { store, node, updateProp, commitProp } = useNodeProps()
 
diff --git a/src/components/properties/StrokeSection.vue b/src/components/properties/StrokeSection.vue
index 11db52091..fa7ec1252 100644
--- a/src/components/properties/StrokeSection.vue
+++ b/src/components/properties/StrokeSection.vue
@@ -14,8 +14,8 @@ import {
   DropdownMenuPortal
 } from 'reka-ui'
 
-import type { Color, Stroke } from '@/engine/scene-graph'
-import type { SceneNode } from '@/engine/scene-graph'
+import type { Color, Stroke } from '@open-pencil/core'
+import type { SceneNode } from '@open-pencil/core'
 
 type StrokeSides = 'ALL' | 'TOP' | 'BOTTOM' | 'LEFT' | 'RIGHT' | 'CUSTOM'
 
diff --git a/src/composables/use-canvas-input.ts b/src/composables/use-canvas-input.ts
index ba3e11684..62b5b0e53 100644
--- a/src/composables/use-canvas-input.ts
+++ b/src/composables/use-canvas-input.ts
@@ -11,11 +11,11 @@ import {
   DEFAULT_TEXT_WIDTH,
   DEFAULT_TEXT_HEIGHT
 } from '@/constants'
-import { computeSelectionBounds, computeSnap } from '@/engine/snap'
+import { computeSelectionBounds, computeSnap } from '@open-pencil/core'
 
-import type { NodeType, SceneNode } from '@/engine/scene-graph'
 import type { EditorStore, Tool } from '@/stores/editor'
 import type { Rect } from '@/types'
+import type { NodeType, SceneNode } from '@open-pencil/core'
 
 type HandlePosition = 'nw' | 'n' | 'ne' | 'e' | 'se' | 's' | 'sw' | 'w'
 
@@ -151,7 +151,7 @@ function getHandlePositions(
     s: { x: mx, y: y2 },
     sw: { x: x1, y: y2 },
     w: { x: x1, y: my }
-  } as Record<HandlePosition, { x: number; y: number }>
+  } satisfies Record<HandlePosition, { x: number; y: number }>
 }
 
 function unrotate(
@@ -224,11 +224,8 @@ function hitTestRotationHandle(
 export function useCanvasInput(
   canvasRef: Ref<HTMLCanvasElement | null>,
   store: EditorStore,
-  hitTestSectionTitle: (cx: number, cy: number) => import('@/engine/scene-graph').SceneNode | null,
-  hitTestComponentLabel: (
-    cx: number,
-    cy: number
-  ) => import('@/engine/scene-graph').SceneNode | null,
+  hitTestSectionTitle: (cx: number, cy: number) => import('@open-pencil/core').SceneNode | null,
+  hitTestComponentLabel: (cx: number, cy: number) => import('@open-pencil/core').SceneNode | null,
   onCursorMove?: (cx: number, cy: number) => void
 ) {
   const drag = ref<DragState | null>(null)
diff --git a/src/composables/use-canvas.ts b/src/composables/use-canvas.ts
index 903e78959..479c4fafc 100644
--- a/src/composables/use-canvas.ts
+++ b/src/composables/use-canvas.ts
@@ -1,8 +1,8 @@
 import { useRafFn, useResizeObserver } from '@vueuse/core'
 import { onMounted, onUnmounted, type Ref } from 'vue'
 
-import { getCanvasKit, getGpuBackend } from '@/engine/canvaskit'
-import { SkiaRenderer } from '@/engine/renderer'
+import { getCanvasKit, getGpuBackend } from '@open-pencil/core'
+import { SkiaRenderer } from '@open-pencil/core'
 
 import type { EditorStore } from '@/stores/editor'
 import type { CanvasKit } from 'canvaskit-wasm'
diff --git a/src/composables/use-chat.ts b/src/composables/use-chat.ts
index 2f30f0ac8..c7f38b3cd 100644
--- a/src/composables/use-chat.ts
+++ b/src/composables/use-chat.ts
@@ -1,5 +1,4 @@
 import { Chat } from '@ai-sdk/vue'
-import { DEFAULT_AI_MODEL } from '@open-pencil/core'
 import { createOpenRouter } from '@openrouter/ai-sdk-provider'
 import { DirectChatTransport, ToolLoopAgent } from 'ai'
 import dedent from 'dedent'
@@ -7,6 +6,7 @@ import { computed, ref, watch } from 'vue'
 
 import { createAITools } from '@/ai/tools'
 import { useEditorStore } from '@/stores/editor'
+import { DEFAULT_AI_MODEL } from '@open-pencil/core'
 
 import type { UIMessage } from 'ai'
 
diff --git a/src/composables/use-collab.ts b/src/composables/use-collab.ts
index df0684344..a5e62cbbb 100644
--- a/src/composables/use-collab.ts
+++ b/src/composables/use-collab.ts
@@ -12,9 +12,9 @@ import {
   YJS_JSON_FIELDS
 } from '@/constants'
 
-import type { SceneNode } from '@/engine/scene-graph'
 import type { EditorStore } from '@/stores/editor'
 import type { Color } from '@/types'
+import type { SceneNode } from '@open-pencil/core'
 import type { Room } from 'trystero'
 
 export interface RemotePeer {
@@ -179,7 +179,9 @@ export function useCollab(store: EditorStore) {
       () => store.state.zoom,
       (zoom) => {
         if (!awareness) return
-        const prev = awareness.getLocalState()?.cursor as Record<string, unknown> | undefined
+        const prev = awareness.getLocalState()?.cursor as
+          | { x: number; y: number; pageId: string; zoom: number }
+          | undefined
         if (prev) {
           awareness.setLocalStateField('cursor', { ...prev, zoom })
         }
diff --git a/src/composables/use-font-status.ts b/src/composables/use-font-status.ts
index 21bafb6bd..2d2c90f98 100644
--- a/src/composables/use-font-status.ts
+++ b/src/composables/use-font-status.ts
@@ -1,6 +1,7 @@
-import { isFontLoaded, DEFAULT_FONT_FAMILY } from '@open-pencil/core'
 import { computed } from 'vue'
 
+import { isFontLoaded, DEFAULT_FONT_FAMILY } from '@open-pencil/core'
+
 import type { SceneNode } from '@open-pencil/core'
 
 export function useNodeFontStatus(node: () => SceneNode) {
diff --git a/src/composables/use-multi-props.ts b/src/composables/use-multi-props.ts
index 2de935d66..83edc8ebf 100644
--- a/src/composables/use-multi-props.ts
+++ b/src/composables/use-multi-props.ts
@@ -2,7 +2,7 @@ import { computed } from 'vue'
 
 import { useEditorStore } from '@/stores/editor'
 
-import type { SceneNode } from '@/engine/scene-graph'
+import type { SceneNode } from '@open-pencil/core'
 
 export const MIXED = Symbol('mixed')
 export type MixedValue<T> = T | typeof MIXED
diff --git a/src/composables/use-node-props.ts b/src/composables/use-node-props.ts
index 1eaf9efbd..dffdc4a55 100644
--- a/src/composables/use-node-props.ts
+++ b/src/composables/use-node-props.ts
@@ -2,7 +2,7 @@ import { computed } from 'vue'
 
 import { useEditorStore } from '@/stores/editor'
 
-import type { SceneNode } from '@/engine/scene-graph'
+import type { SceneNode } from '@open-pencil/core'
 
 export function useNodeProps() {
   const store = useEditorStore()
diff --git a/src/composables/use-text-edit.ts b/src/composables/use-text-edit.ts
index 89384b76d..149b2184b 100644
--- a/src/composables/use-text-edit.ts
+++ b/src/composables/use-text-edit.ts
@@ -7,10 +7,10 @@ import {
   toggleBoldInRange,
   toggleDecorationInRange,
   toggleItalicInRange
-} from '@/engine/style-runs'
+} from '@open-pencil/core'
 
-import type { SceneNode } from '@/engine/scene-graph'
 import type { EditorStore } from '@/stores/editor'
+import type { SceneNode } from '@open-pencil/core'
 
 const CARET_BLINK_MS = 530
 
diff --git a/src/demo.ts b/src/demo.ts
index a99f12e7f..6e55386ff 100644
--- a/src/demo.ts
+++ b/src/demo.ts
@@ -1,7 +1,7 @@
-import { computeAllLayouts } from './engine/layout'
+import { computeAllLayouts } from '@open-pencil/core'
 
-import type { Color, Effect, Fill, GradientStop } from './engine/scene-graph'
 import type { EditorStore } from './stores/editor'
+import type { Color, Effect, Fill, GradientStop } from '@open-pencil/core'
 
 const WHITE: Color = { r: 1, g: 1, b: 1, a: 1 }
 const BLACK: Color = { r: 0, g: 0, b: 0, a: 1 }
diff --git a/src/engine/canvaskit.ts b/src/engine/canvaskit.ts
deleted file mode 100644
index eacfcbc60..000000000
--- a/src/engine/canvaskit.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-export {
-  getCanvasKit,
-  getGpuBackend,
-  type CanvasKitOptions,
-  type GpuBackend
-} from '@open-pencil/core'
diff --git a/src/engine/clipboard.ts b/src/engine/clipboard.ts
deleted file mode 100644
index f5a792057..000000000
--- a/src/engine/clipboard.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-export {
-  parseFigmaClipboard,
-  importClipboardNodes,
-  figmaNodesBounds,
-  parseOpenPencilClipboard,
-  buildFigmaClipboardHTML,
-  buildOpenPencilClipboardHTML,
-  prefetchFigmaSchema
-} from '@open-pencil/core'
diff --git a/src/engine/color.ts b/src/engine/color.ts
deleted file mode 100644
index 1c5caf414..000000000
--- a/src/engine/color.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { parseColor, colorToHex, colorToHexRaw, colorToRgba255 } from '@open-pencil/core'
diff --git a/src/engine/fig-export.ts b/src/engine/fig-export.ts
deleted file mode 100644
index 78027cac5..000000000
--- a/src/engine/fig-export.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { exportFigFile } from '@open-pencil/core'
diff --git a/src/engine/layout.ts b/src/engine/layout.ts
deleted file mode 100644
index 38b292185..000000000
--- a/src/engine/layout.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { computeLayout, computeAllLayouts, setTextMeasurer } from '@open-pencil/core'
diff --git a/src/engine/render-image.ts b/src/engine/render-image.ts
deleted file mode 100644
index 1e8d09042..000000000
--- a/src/engine/render-image.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { renderNodesToImage, renderThumbnail, type ExportFormat } from '@open-pencil/core'
diff --git a/src/engine/renderer.ts b/src/engine/renderer.ts
deleted file mode 100644
index 9d6b979d4..000000000
--- a/src/engine/renderer.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { SkiaRenderer, type RenderOverlays } from '@open-pencil/core'
diff --git a/src/engine/scene-graph.ts b/src/engine/scene-graph.ts
deleted file mode 100644
index d9f1574a2..000000000
--- a/src/engine/scene-graph.ts
+++ /dev/null
@@ -1,39 +0,0 @@
-export { SceneGraph } from '@open-pencil/core'
-export type {
-  GUID,
-  Color,
-  SceneNode,
-  NodeType,
-  Fill,
-  FillType,
-  Stroke,
-  StrokeCap,
-  StrokeJoin,
-  Effect,
-  BlendMode,
-  ImageScaleMode,
-  GradientStop,
-  GradientTransform,
-  LayoutMode,
-  LayoutSizing,
-  LayoutAlign,
-  LayoutCounterAlign,
-  LayoutWrap,
-  ConstraintType,
-  TextAutoResize,
-  TextAlignVertical,
-  TextCase,
-  TextDecoration,
-  ArcData,
-  VectorNetwork,
-  VectorVertex,
-  VectorSegment,
-  VectorRegion,
-  HandleMirroring,
-  WindingRule,
-  VariableType,
-  VariableValue,
-  Variable,
-  VariableCollection,
-  VariableCollectionMode
-} from '@open-pencil/core'
diff --git a/src/engine/snap.ts b/src/engine/snap.ts
deleted file mode 100644
index dcfb884b7..000000000
--- a/src/engine/snap.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { computeSelectionBounds, computeSnap, type SnapGuide } from '@open-pencil/core'
diff --git a/src/engine/style-runs.ts b/src/engine/style-runs.ts
deleted file mode 100644
index add633218..000000000
--- a/src/engine/style-runs.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-export {
-  toggleBoldInRange,
-  toggleItalicInRange,
-  toggleDecorationInRange,
-  adjustRunsForInsert,
-  adjustRunsForDelete
-} from '@open-pencil/core'
diff --git a/src/engine/svg-export.ts b/src/engine/svg-export.ts
deleted file mode 100644
index 5afc7b4a5..000000000
--- a/src/engine/svg-export.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { renderNodesToSVG, type SVGExportOptions } from '@open-pencil/core'
diff --git a/src/engine/text-editor.ts b/src/engine/text-editor.ts
deleted file mode 100644
index b5daf5954..000000000
--- a/src/engine/text-editor.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { TextEditor, type TextCaret, type TextEditorState } from '@open-pencil/core'
diff --git a/src/engine/undo.ts b/src/engine/undo.ts
deleted file mode 100644
index efd7af07b..000000000
--- a/src/engine/undo.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { UndoManager } from '@open-pencil/core'
diff --git a/src/engine/vector.ts b/src/engine/vector.ts
deleted file mode 100644
index 9b4d74151..000000000
--- a/src/engine/vector.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-export {
-  vectorNetworkToPath,
-  decodeVectorNetworkBlob,
-  encodeVectorNetworkBlob,
-  computeVectorBounds
-} from '@open-pencil/core'
diff --git a/src/kiwi/client.ts b/src/kiwi/client.ts
deleted file mode 100644
index ebdbb17c8..000000000
--- a/src/kiwi/client.ts
+++ /dev/null
@@ -1,350 +0,0 @@
-/**
- * Figma Multiplayer WebSocket Client
- *
- * High-level interface for connecting to Figma's multiplayer server
- * and creating/modifying nodes directly via WebSocket.
- *
- * Performance: ~1000 nodes in 15-20ms (vs 50-100s via plugin API)
- */
-
-import {
-  initCodec,
-  encodeMessage,
-  decodeMessage,
-  decompress,
-  createNodeChangesMessage,
-  type NodeChange,
-  type FigmaMessage
-} from './codec.ts'
-import {
-  buildMultiplayerUrl,
-  MESSAGE_TYPES,
-  isZstdCompressed,
-  hasFigWireHeader,
-  skipFigWireHeader,
-  isKiwiMessage,
-  getKiwiMessageType
-} from './protocol.ts'
-
-import type { ChromeDevToolsTarget } from '@/types.ts'
-
-export interface SessionInfo {
-  sessionID: number
-  reconnectSequenceNumber: number
-}
-
-export interface ConnectionOptions {
-  connectionTimeout?: number
-  onMessage?: (message: FigmaMessage) => void
-  onError?: (error: Error) => void
-}
-
-type ConnectionState = 'disconnected' | 'connecting' | 'connected' | 'ready'
-
-export class FigmaMultiplayerClient {
-  private fileKey: string
-  private ws: WebSocket | null = null
-  private state: ConnectionState = 'disconnected'
-  private sessionInfo: SessionInfo | null = null
-  private localIDCounter: number
-  private options: ConnectionOptions
-
-  constructor(fileKey: string, options: ConnectionOptions = {}) {
-    this.fileKey = fileKey
-    this.localIDCounter = Date.now() % 10000000
-    this.options = {
-      connectionTimeout: 30000,
-      ...options
-    }
-  }
-
-  /**
-   * Connect to Figma multiplayer server
-   */
-  async connect(cookies: string): Promise<SessionInfo> {
-    if (this.state !== 'disconnected') {
-      throw new Error(`Cannot connect: state is ${this.state}`)
-    }
-
-    await initCodec()
-    this.state = 'connecting'
-
-    return new Promise((resolve, reject) => {
-      const url = buildMultiplayerUrl(this.fileKey)
-
-      this.ws = new WebSocket(url, {
-        headers: {
-          Cookie: cookies,
-          Origin: 'https://www.figma.com'
-        }
-      } as WebSocketInit)
-
-      this.ws.binaryType = 'arraybuffer'
-
-      const timeout = setTimeout(() => {
-        this.close()
-        reject(new Error('Connection timeout'))
-      }, this.options.connectionTimeout)
-
-      let sessionID = 0
-      let reconnectSequenceNumber = 0
-      let joinEndReceived = false
-
-      this.ws.onmessage = (event) => {
-        if (!(event.data instanceof ArrayBuffer)) return
-
-        let data: Uint8Array = new Uint8Array(event.data as ArrayBuffer)
-
-        // Skip fig-wire header if present
-        if (hasFigWireHeader(data)) {
-          data = new Uint8Array(skipFigWireHeader(data))
-        }
-
-        if (!isZstdCompressed(data)) return
-
-        try {
-          const decompressed = decompress(data)
-
-          // Skip non-Kiwi message data (e.g., schema definitions)
-          if (!isKiwiMessage(decompressed)) return
-
-          const msgType = getKiwiMessageType(decompressed)
-          if (!msgType) return
-
-          // JOIN_END: sync complete
-          if (msgType === MESSAGE_TYPES.JOIN_END) {
-            joinEndReceived = true
-          }
-
-          // SIGNAL: extract reconnect-sequence-number
-          if (msgType === MESSAGE_TYPES.SIGNAL) {
-            const str = new TextDecoder().decode(decompressed)
-            const match = str.match(/reconnect-sequence-number[^\d]*(\d+)/)
-            if (match?.[1]) {
-              reconnectSequenceNumber = parseInt(match[1])
-            }
-          }
-
-          // Forward messages when ready
-          if (this.options.onMessage && this.state === 'ready') {
-            try {
-              const message = decodeMessage(data)
-              this.options.onMessage(message)
-            } catch {
-              // Ignore decode errors
-            }
-          }
-
-          // Check if handshake complete
-          // Note: sessionID may be 0 if Figma changed protocol; caller gets it from plugin API
-          if (joinEndReceived && (this.state === 'connecting' || this.state === 'connected')) {
-            clearTimeout(timeout)
-            this.state = 'ready'
-            this.sessionInfo = { sessionID: sessionID || 0, reconnectSequenceNumber }
-            resolve(this.sessionInfo)
-          }
-        } catch {
-          // Ignore parse errors
-        }
-      }
-
-      this.ws.onopen = () => {
-        this.state = 'connected'
-      }
-
-      this.ws.onerror = () => {
-        clearTimeout(timeout)
-        const error = new Error('WebSocket connection failed')
-        this.options.onError?.(error)
-        if (this.state === 'connecting') {
-          reject(error)
-        }
-      }
-
-      this.ws.onclose = () => {
-        clearTimeout(timeout)
-        const wasConnecting = this.state === 'connecting'
-        this.state = 'disconnected'
-        this.ws = null
-        if (wasConnecting) {
-          reject(new Error('Connection closed during handshake'))
-        }
-      }
-    })
-  }
-
-  /**
-   * Send node changes to Figma (fire and forget)
-   */
-  async sendNodeChanges(nodeChanges: NodeChange[]): Promise<void> {
-    if (this.state !== 'ready' || !this.ws || !this.sessionInfo) {
-      throw new Error('Not connected')
-    }
-
-    const message = createNodeChangesMessage(
-      this.sessionInfo.sessionID,
-      this.sessionInfo.reconnectSequenceNumber,
-      nodeChanges
-    )
-
-    const encoded = encodeMessage(message)
-    this.ws.send(encoded)
-  }
-
-  /**
-   * Send node changes and wait for server ACK (NODE_CHANGES echo)
-   * This guarantees nodes are synced before returning
-   */
-  async sendNodeChangesSync(nodeChanges: NodeChange[], timeout = 5000): Promise<void> {
-    if (this.state !== 'ready' || !this.ws || !this.sessionInfo) {
-      throw new Error('Not connected')
-    }
-
-    return new Promise((resolve, reject) => {
-      const timer = setTimeout(() => {
-        this.ws?.removeEventListener('message', handler)
-        reject(new Error('ACK timeout'))
-      }, timeout)
-
-      const handler = (event: MessageEvent) => {
-        if (!(event.data instanceof ArrayBuffer)) return
-
-        let data: Uint8Array = new Uint8Array(event.data as ArrayBuffer)
-        if (hasFigWireHeader(data)) data = new Uint8Array(skipFigWireHeader(data))
-        if (!isZstdCompressed(data)) return
-
-        try {
-          const dec = decompress(data)
-          if (isKiwiMessage(dec) && getKiwiMessageType(dec) === MESSAGE_TYPES.NODE_CHANGES) {
-            clearTimeout(timer)
-            this.ws?.removeEventListener('message', handler)
-            resolve()
-          }
-        } catch {}
-      }
-
-      this.ws?.addEventListener('message', handler)
-      this.sendNodeChanges(nodeChanges)
-    })
-  }
-
-  /**
-   * Generate unique local ID for new nodes
-   */
-  nextLocalID(): number {
-    return this.localIDCounter++
-  }
-
-  /**
-   * Get current session info
-   */
-  getSession(): SessionInfo | null {
-    return this.sessionInfo
-  }
-
-  /**
-   * Check if connected and ready
-   */
-  isReady(): boolean {
-    return this.state === 'ready'
-  }
-
-  /**
-   * Check if connection is still alive
-   */
-  isConnected(): boolean {
-    return this.state === 'connected' && this.ws !== null && this.ws.readyState === WebSocket.OPEN
-  }
-
-  /**
-   * Close the connection
-   */
-  close(): void {
-    if (this.ws) {
-      this.ws.close()
-      this.ws = null
-    }
-    this.state = 'disconnected'
-    this.sessionInfo = null
-  }
-}
-
-// WebSocket with headers support (Bun/Node specific)
-interface WebSocketInit {
-  headers?: Record<string, string>
-}
-
-/**
- * Get Figma cookies from Chrome DevTools Protocol
- *
- * Requires Chrome/Figma to be running with:
- *   --remote-debugging-port=9222
- */
-export async function getCookiesFromDevTools(pageId?: string): Promise<string> {
-  // Get list of pages if no ID provided
-  if (!pageId) {
-    const listResponse = await fetch('http://localhost:9222/json')
-    const targets = (await listResponse.json()) as ChromeDevToolsTarget[]
-    const figmaTarget = targets.find((t) => t.url.includes('figma.com'))
-    if (!figmaTarget) {
-      throw new Error('No Figma tab found. Open Figma in Chrome with --remote-debugging-port=9222')
-    }
-    pageId = figmaTarget.id
-  }
-
-  const wsUrl = `ws://localhost:9222/devtools/page/${pageId}`
-
-  return new Promise((resolve, reject) => {
-    const ws = new WebSocket(wsUrl)
-
-    const timeout = setTimeout(() => {
-      ws.close()
-      reject(new Error('DevTools connection timeout'))
-    }, 5000)
-
-    ws.onopen = () => {
-      ws.send(
-        JSON.stringify({
-          id: 1,
-          method: 'Network.getCookies',
-          params: { urls: ['https://www.figma.com'] }
-        })
-      )
-    }
-
-    ws.onmessage = (e) => {
-      clearTimeout(timeout)
-      const data = JSON.parse(e.data as string)
-      if (data.result?.cookies) {
-        ws.close()
-        const cookieString = data.result.cookies
-          .map((c: { name: string; value: string }) => `${c.name}=${c.value}`)
-          .join('; ')
-        resolve(cookieString)
-      }
-    }
-
-    ws.onerror = () => {
-      clearTimeout(timeout)
-      reject(
-        new Error(
-          'Cannot connect to Chrome DevTools. Is Chrome running with --remote-debugging-port=9222?'
-        )
-      )
-    }
-  })
-}
-
-/**
- * Parse Figma file key from URL
- */
-export function parseFileKey(urlOrKey: string): string {
-  if (!urlOrKey.includes('/')) {
-    return urlOrKey
-  }
-  const match = urlOrKey.match(/figma\.com\/(?:file|design)\/([a-zA-Z0-9]+)/)
-  if (!match?.[1]) {
-    throw new Error('Invalid Figma URL')
-  }
-  return match[1]
-}
diff --git a/src/kiwi/codec.ts b/src/kiwi/codec.ts
deleted file mode 100644
index 314c3d1b4..000000000
--- a/src/kiwi/codec.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-export {
-  initCodec,
-  encodeMessage,
-  decodeMessage,
-  compress,
-  decompress,
-  getCompiledSchema,
-  getSchemaBytes,
-  createNodeChangesMessage,
-  createNodeChange,
-  parseVariableId,
-  encodePaintWithVariableBinding,
-  encodeNodeChangeWithVariables,
-  type NodeChange,
-  type KiwiGUID as GUID,
-  type KiwiColor as Color,
-  type KiwiPaint as Paint,
-  type VariableBinding,
-  type ParentIndex,
-  type FigmaMessage
-} from '@open-pencil/core'
diff --git a/src/kiwi/fig-file.ts b/src/kiwi/fig-file.ts
deleted file mode 100644
index 50c326c0f..000000000
--- a/src/kiwi/fig-file.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { readFigFile } from '@open-pencil/core'
diff --git a/src/kiwi/fig-import.ts b/src/kiwi/fig-import.ts
deleted file mode 100644
index d2a226672..000000000
--- a/src/kiwi/fig-import.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { importNodeChanges } from '@open-pencil/core'
diff --git a/src/kiwi/index.ts b/src/kiwi/index.ts
deleted file mode 100644
index 07aa31b63..000000000
--- a/src/kiwi/index.ts
+++ /dev/null
@@ -1,50 +0,0 @@
-/**
- * Figma Multiplayer Module
- *
- * Direct WebSocket access to Figma's multiplayer protocol.
- * Enables creating nodes 1000-5000x faster than the plugin API.
- */
-
-export {
-  FigmaMultiplayerClient,
-  getCookiesFromDevTools,
-  parseFileKey,
-  type SessionInfo,
-  type ConnectionOptions
-} from './client.ts'
-
-export {
-  initCodec,
-  encodeMessage,
-  decodeMessage,
-  createNodeChangesMessage,
-  createNodeChange,
-  parseVariableId,
-  encodePaintWithVariableBinding,
-  encodeNodeChangeWithVariables,
-  type GUID,
-  type Color,
-  type Paint,
-  type VariableBinding,
-  type ParentIndex,
-  type FigmaMessage
-} from './codec.ts'
-
-export {
-  MESSAGE_TYPES,
-  NODE_TYPES,
-  NODE_PHASES,
-  BLEND_MODES,
-  PAINT_TYPES,
-  PROTOCOL_VERSION,
-  KIWI,
-  SESSION_ID,
-  ZSTD_MAGIC,
-  buildMultiplayerUrl,
-  isZstdCompressed,
-  hasFigWireHeader,
-  skipFigWireHeader,
-  isKiwiMessage,
-  getKiwiMessageType,
-  parseVarint
-} from './protocol.ts'
diff --git a/src/kiwi/protocol.ts b/src/kiwi/protocol.ts
deleted file mode 100644
index 29d6d5e06..000000000
--- a/src/kiwi/protocol.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-export {
-  MESSAGE_TYPES,
-  NODE_TYPES,
-  NODE_PHASES,
-  BLEND_MODES,
-  PAINT_TYPES,
-  PROTOCOL_VERSION,
-  KIWI,
-  SESSION_ID,
-  ZSTD_MAGIC,
-  FIG_WIRE_MAGIC,
-  buildMultiplayerUrl,
-  isZstdCompressed,
-  hasFigWireHeader,
-  skipFigWireHeader,
-  isKiwiMessage,
-  getKiwiMessageType,
-  parseVarint
-} from '@open-pencil/core'
diff --git a/src/stores/editor.ts b/src/stores/editor.ts
index d269c1905..b2703cc9c 100644
--- a/src/stores/editor.ts
+++ b/src/stores/editor.ts
@@ -1,4 +1,3 @@
-import { collectFontKeys } from '@open-pencil/core'
 import { shallowReactive, shallowRef, computed, watch } from 'vue'
 
 import {
@@ -12,39 +11,42 @@ import {
   ZOOM_SCALE_MIN,
   ZOOM_SCALE_MAX
 } from '@/constants'
+import { loadFont } from '@/engine/fonts'
 import {
-  parseFigmaClipboard,
+  collectFontKeys,
+  computeLayout,
+  computeAllLayouts,
+  computeVectorBounds,
+  exportFigFile,
   importClipboardNodes,
   figmaNodesBounds,
+  parseFigmaClipboard,
   parseOpenPencilClipboard,
   buildFigmaClipboardHTML,
   buildOpenPencilClipboardHTML,
-  prefetchFigmaSchema
-} from '@/engine/clipboard'
-import { exportFigFile } from '@/engine/fig-export'
-import { loadFont } from '@/engine/fonts'
-import { computeLayout, computeAllLayouts, setTextMeasurer } from '@/engine/layout'
-import { renderNodesToImage } from '@/engine/render-image'
-import { SceneGraph } from '@/engine/scene-graph'
-import { renderNodesToSVG } from '@/engine/svg-export'
-import { TextEditor } from '@/engine/text-editor'
-import { UndoManager } from '@/engine/undo'
-import { computeVectorBounds } from '@/engine/vector'
-import { readFigFile } from '@/kiwi/fig-file'
+  prefetchFigmaSchema,
+  renderNodesToImage,
+  renderNodesToSVG,
+  SceneGraph,
+  setTextMeasurer,
+  TextEditor,
+  UndoManager
+} from '@open-pencil/core'
+import { readFigFile } from '@open-pencil/core'
 
-import type { ExportFormat } from '@/engine/render-image'
+import type { Color, Rect } from '@/types'
 import type {
-  SceneNode,
-  NodeType,
+  ExportFormat,
   Fill,
   LayoutMode,
-  VectorVertex,
-  VectorSegment,
+  NodeType,
+  SceneNode,
+  SnapGuide,
+  VectorNetwork,
   VectorRegion,
-  VectorNetwork
-} from '@/engine/scene-graph'
-import type { SnapGuide } from '@/engine/snap'
-import type { Color, Rect } from '@/types'
+  VectorSegment,
+  VectorVertex
+} from '@open-pencil/core'
 
 export type Tool =
   | 'SELECT'
@@ -129,7 +131,7 @@ export function createEditorStore() {
   let lastWriteTime = 0
   let unwatchFile: (() => void) | null = null
   let _ck: import('canvaskit-wasm').CanvasKit | null = null
-  let _renderer: import('@/engine/renderer').SkiaRenderer | null = null
+  let _renderer: import('@open-pencil/core').SkiaRenderer | null = null
   let _textEditor: TextEditor | null = null
 
   prefetchFigmaSchema()
@@ -624,7 +626,7 @@ export function createEditorStore() {
 
   function setCanvasKit(
     ck: import('canvaskit-wasm').CanvasKit,
-    renderer: import('@/engine/renderer').SkiaRenderer
+    renderer: import('@open-pencil/core').SkiaRenderer
   ) {
     _ck = ck
     _renderer = renderer
@@ -945,10 +947,9 @@ export function createEditorStore() {
   function updateNodeWithUndo(id: string, changes: Partial<SceneNode>, label = 'Update') {
     const node = graph.getNode(id)
     if (!node) return
-    const previous: Partial<SceneNode> = {}
-    for (const key of Object.keys(changes) as (keyof SceneNode)[]) {
-      ;(previous as Record<string, unknown>)[key] = node[key]
-    }
+    const previous = Object.fromEntries(
+      (Object.keys(changes) as (keyof SceneNode)[]).map((key) => [key, node[key]])
+    ) as Partial<SceneNode>
     graph.updateNode(id, changes)
     runLayoutForNode(id)
     syncIfInsideComponent(id)
@@ -1006,12 +1007,11 @@ export function createEditorStore() {
     if (mode !== 'NONE') computeLayout(graph, id)
     runLayoutForNode(id)
 
-    const finalState: Partial<SceneNode> = {}
     const updated = graph.getNode(id)
     if (!updated) return
-    for (const key of Object.keys(previous) as (keyof SceneNode)[]) {
-      ;(finalState as Record<string, unknown>)[key] = updated[key]
-    }
+    const finalState = Object.fromEntries(
+      (Object.keys(previous) as (keyof SceneNode)[]).map((key) => [key, updated[key]])
+    ) as Partial<SceneNode>
 
     undo.push({
       label: mode === 'NONE' ? 'Remove auto layout' : 'Add auto layout',
@@ -1989,10 +1989,9 @@ export function createEditorStore() {
   function commitNodeUpdate(nodeId: string, previous: Partial<SceneNode>, label = 'Update') {
     const node = graph.getNode(nodeId)
     if (!node) return
-    const current: Partial<SceneNode> = {}
-    for (const key of Object.keys(previous) as (keyof SceneNode)[]) {
-      ;(current as Record<string, unknown>)[key] = node[key]
-    }
+    const current = Object.fromEntries(
+      (Object.keys(previous) as (keyof SceneNode)[]).map((key) => [key, node[key]])
+    ) as Partial<SceneNode>
     undo.push({
       label,
       forward: () => {