diff --git a/blocksuite/affine/all/package.json b/blocksuite/affine/all/package.json
index 42956c040d..acc45d5f44 100644
--- a/blocksuite/affine/all/package.json
+++ b/blocksuite/affine/all/package.json
@@ -208,7 +208,9 @@
     "./model": "./src/model/index.ts",
     "./sync": "./src/sync/index.ts",
     "./adapters": "./src/adapters/index.ts",
-    "./extensions": "./src/extensions/index.ts"
+    "./extensions": "./src/extensions/index.ts",
+    "./extensions/store": "./src/extensions/store.ts",
+    "./extensions/view": "./src/extensions/view.ts"
   },
   "files": [
     "src",
diff --git a/blocksuite/affine/all/src/extensions/migrating.ts b/blocksuite/affine/all/src/extensions/migrating.ts
new file mode 100644
index 0000000000..aa6411a9c7
--- /dev/null
+++ b/blocksuite/affine/all/src/extensions/migrating.ts
@@ -0,0 +1,153 @@
+import { AttachmentBlockSpec } from '@blocksuite/affine-block-attachment';
+import { BookmarkBlockSpec } from '@blocksuite/affine-block-bookmark';
+import { CalloutBlockSpec } from '@blocksuite/affine-block-callout';
+import { CodeBlockSpec } from '@blocksuite/affine-block-code';
+import { DataViewBlockSpec } from '@blocksuite/affine-block-data-view';
+import { DatabaseBlockSpec } from '@blocksuite/affine-block-database';
+import { DividerBlockSpec } from '@blocksuite/affine-block-divider';
+import { EdgelessTextBlockSpec } from '@blocksuite/affine-block-edgeless-text';
+import { EmbedExtensions } from '@blocksuite/affine-block-embed';
+import { FrameBlockSpec } from '@blocksuite/affine-block-frame';
+import { ImageBlockSpec } from '@blocksuite/affine-block-image';
+import { LatexBlockSpec } from '@blocksuite/affine-block-latex';
+import { ListBlockSpec } from '@blocksuite/affine-block-list';
+import {
+  EdgelessNoteBlockSpec,
+  NoteBlockSpec,
+} from '@blocksuite/affine-block-note';
+import { ParagraphBlockSpec } from '@blocksuite/affine-block-paragraph';
+import {
+  EdgelessBuiltInSpecs,
+  PageRootBlockSpec,
+  PreviewEdgelessRootBlockSpec,
+  PreviewPageRootBlockSpec,
+  ReadOnlyClipboard,
+} from '@blocksuite/affine-block-root';
+import {
+  EdgelessSurfaceBlockAdapterExtensions,
+  EdgelessSurfaceBlockSpec,
+  PageSurfaceBlockSpec,
+  SurfaceBlockAdapterExtensions,
+} from '@blocksuite/affine-block-surface';
+import {
+  EdgelessSurfaceRefBlockSpec,
+  PageSurfaceRefBlockSpec,
+} from '@blocksuite/affine-block-surface-ref';
+import { TableBlockSpec } from '@blocksuite/affine-block-table';
+import {
+  brushToMarkdownAdapterMatcher,
+  brushToPlainTextAdapterMatcher,
+} from '@blocksuite/affine-gfx-brush';
+import {
+  connectorToMarkdownAdapterMatcher,
+  connectorToPlainTextAdapterMatcher,
+} from '@blocksuite/affine-gfx-connector';
+import {
+  groupToMarkdownAdapterMatcher,
+  groupToPlainTextAdapterMatcher,
+} from '@blocksuite/affine-gfx-group';
+import {
+  mindmapToMarkdownAdapterMatcher,
+  mindmapToPlainTextAdapterMatcher,
+} from '@blocksuite/affine-gfx-mindmap';
+import {
+  shapeToMarkdownAdapterMatcher,
+  shapeToPlainTextAdapterMatcher,
+} from '@blocksuite/affine-gfx-shape';
+import {
+  textToMarkdownAdapterMatcher,
+  textToPlainTextAdapterMatcher,
+} from '@blocksuite/affine-gfx-text';
+import { inlinePresetExtensions } from '@blocksuite/affine-inline-preset';
+import {
+  DefaultOpenDocExtension,
+  DocDisplayMetaService,
+  EditPropsStore,
+  FontLoaderService,
+} from '@blocksuite/affine-shared/services';
+import type { ExtensionType } from '@blocksuite/store';
+
+const elementToPlainTextAdapterMatchers = [
+  groupToPlainTextAdapterMatcher,
+  shapeToPlainTextAdapterMatcher,
+  connectorToPlainTextAdapterMatcher,
+  brushToPlainTextAdapterMatcher,
+  textToPlainTextAdapterMatcher,
+  mindmapToPlainTextAdapterMatcher,
+];
+
+const elementToMarkdownAdapterMatchers = [
+  groupToMarkdownAdapterMatcher,
+  shapeToMarkdownAdapterMatcher,
+  connectorToMarkdownAdapterMatcher,
+  brushToMarkdownAdapterMatcher,
+  textToMarkdownAdapterMatcher,
+  mindmapToMarkdownAdapterMatcher,
+];
+
+const CommonBlockSpecs: ExtensionType[] = [
+  inlinePresetExtensions,
+  DocDisplayMetaService,
+  EditPropsStore,
+  LatexBlockSpec,
+  ListBlockSpec,
+  DatabaseBlockSpec,
+  TableBlockSpec,
+  DataViewBlockSpec,
+  DividerBlockSpec,
+  BookmarkBlockSpec,
+  EmbedExtensions,
+  AttachmentBlockSpec,
+  CodeBlockSpec,
+  ImageBlockSpec,
+  ParagraphBlockSpec,
+  DefaultOpenDocExtension,
+  FontLoaderService,
+  CalloutBlockSpec,
+  FrameBlockSpec,
+
+  elementToPlainTextAdapterMatchers,
+  elementToMarkdownAdapterMatchers,
+].flat();
+
+const PageFirstPartyBlockSpecs: ExtensionType[] = [
+  CommonBlockSpecs,
+  NoteBlockSpec,
+  PageSurfaceBlockSpec,
+  PageSurfaceRefBlockSpec,
+
+  ...SurfaceBlockAdapterExtensions,
+].flat();
+
+const EdgelessFirstPartyBlockSpecs: ExtensionType[] = [
+  CommonBlockSpecs,
+
+  EdgelessNoteBlockSpec,
+  EdgelessSurfaceBlockSpec,
+  EdgelessSurfaceRefBlockSpec,
+  EdgelessTextBlockSpec,
+
+  ...EdgelessSurfaceBlockAdapterExtensions,
+].flat();
+
+export const MigratingEdgelessEditorBlockSpecs: ExtensionType[] = [
+  EdgelessBuiltInSpecs,
+  EdgelessFirstPartyBlockSpecs,
+].flat();
+
+export const MigratingPageEditorBlockSpecs: ExtensionType[] = [
+  PageRootBlockSpec,
+  PageFirstPartyBlockSpecs,
+].flat();
+
+export const MigratingPreviewEdgelessEditorBlockSpecs: ExtensionType[] = [
+  PreviewEdgelessRootBlockSpec,
+  EdgelessFirstPartyBlockSpecs,
+  ReadOnlyClipboard,
+].flat();
+
+export const MigratingPreviewPageEditorBlockSpecs: ExtensionType[] = [
+  PreviewPageRootBlockSpec,
+  PageFirstPartyBlockSpecs,
+  ReadOnlyClipboard,
+].flat();
diff --git a/blocksuite/affine/all/src/extensions/store.ts b/blocksuite/affine/all/src/extensions/store.ts
index 48085e9c11..1cdcb8ec5a 100644
--- a/blocksuite/affine/all/src/extensions/store.ts
+++ b/blocksuite/affine/all/src/extensions/store.ts
@@ -4,6 +4,10 @@ import { EmbedIframeConfigExtensions } from '@blocksuite/affine-block-embed';
 import { ImageStoreSpec } from '@blocksuite/affine-block-image';
 import { SurfaceBlockSchemaExtension } from '@blocksuite/affine-block-surface';
 import { TableSelectionExtension } from '@blocksuite/affine-block-table';
+import {
+  type StoreExtensionContext,
+  StoreExtensionProvider,
+} from '@blocksuite/affine-ext-loader';
 import {
   AttachmentBlockSchemaExtension,
   BookmarkBlockSchemaExtension,
@@ -110,3 +114,12 @@ export const StoreExtensions: ExtensionType[] = [
   EmbedIframeConfigExtensions,
   EmbedIframeService,
 ].flat();
+
+export class MigratingStoreExtension extends StoreExtensionProvider {
+  override name = 'migrating';
+
+  override setup(context: StoreExtensionContext) {
+    super.setup(context);
+    context.register(StoreExtensions);
+  }
+}
diff --git a/blocksuite/affine/all/src/extensions/view.ts b/blocksuite/affine/all/src/extensions/view.ts
new file mode 100644
index 0000000000..e440078357
--- /dev/null
+++ b/blocksuite/affine/all/src/extensions/view.ts
@@ -0,0 +1,42 @@
+import {
+  type ViewExtensionContext,
+  ViewExtensionProvider,
+} from '@blocksuite/affine-ext-loader';
+
+import { effects } from '../effects';
+import {
+  MigratingEdgelessEditorBlockSpecs,
+  MigratingPageEditorBlockSpecs,
+  MigratingPreviewEdgelessEditorBlockSpecs,
+  MigratingPreviewPageEditorBlockSpecs,
+} from './migrating';
+
+export class MigratingViewExtension extends ViewExtensionProvider {
+  override name = 'migrating';
+
+  override effect() {
+    super.effect();
+    effects();
+  }
+
+  override setup(context: ViewExtensionContext) {
+    super.setup(context);
+    const scope = context.scope;
+    if (scope === 'preview-page') {
+      context.register(MigratingPreviewPageEditorBlockSpecs);
+      return;
+    }
+    if (scope === 'preview-edgeless') {
+      context.register(MigratingPreviewEdgelessEditorBlockSpecs);
+      return;
+    }
+    if (scope === 'page' || scope === 'mobile-page') {
+      context.register(MigratingPageEditorBlockSpecs);
+      return;
+    }
+    if (scope === 'edgeless' || scope === 'mobile-edgeless') {
+      context.register(MigratingEdgelessEditorBlockSpecs);
+      return;
+    }
+  }
+}
diff --git a/blocksuite/affine/blocks/embed/src/common/render-linked-doc.ts b/blocksuite/affine/blocks/embed/src/common/render-linked-doc.ts
index 270dfc96c2..3601db8c52 100644
--- a/blocksuite/affine/blocks/embed/src/common/render-linked-doc.ts
+++ b/blocksuite/affine/blocks/embed/src/common/render-linked-doc.ts
@@ -1,4 +1,5 @@
 import { getSurfaceBlock } from '@blocksuite/affine-block-surface';
+import { ViewExtensionManagerIdentifier } from '@blocksuite/affine-ext-loader';
 import {
   type DocMode,
   ImageBlockModel,
@@ -9,7 +10,7 @@ import {
 } from '@blocksuite/affine-model';
 import { EMBED_CARD_HEIGHT } from '@blocksuite/affine-shared/consts';
 import { NotificationProvider } from '@blocksuite/affine-shared/services';
-import { matchModels, SpecProvider } from '@blocksuite/affine-shared/utils';
+import { matchModels } from '@blocksuite/affine-shared/utils';
 import { BlockStdScope, EditorLifeCycleExtension } from '@blocksuite/std';
 import {
   type BlockModel,
@@ -202,10 +203,13 @@ async function renderNoteContent(
     match: ids.map(id => ({ id, viewType: 'display' })),
   };
   const previewDoc = doc.doc.getStore({ query });
-  const previewSpec = SpecProvider._.getSpec('preview:page');
+  const std = card.host.std;
+  const previewSpec = std
+    .get(ViewExtensionManagerIdentifier)
+    .get('preview-page');
   const previewStd = new BlockStdScope({
     store: previewDoc,
-    extensions: previewSpec.value,
+    extensions: previewSpec,
   });
   const previewTemplate = previewStd.render();
   const fragment = document.createDocumentFragment();
diff --git a/blocksuite/affine/blocks/embed/src/embed-synced-doc-block/embed-edgeless-synced-doc-block.ts b/blocksuite/affine/blocks/embed/src/embed-synced-doc-block/embed-edgeless-synced-doc-block.ts
index 00446dd284..0a92d398a6 100644
--- a/blocksuite/affine/blocks/embed/src/embed-synced-doc-block/embed-edgeless-synced-doc-block.ts
+++ b/blocksuite/affine/blocks/embed/src/embed-synced-doc-block/embed-edgeless-synced-doc-block.ts
@@ -70,7 +70,7 @@ export class EmbedEdgelessSyncedDocBlockComponent extends toEdgelessEmbedBlock(
             <div class="affine-page-viewport" data-theme=${appTheme}>
               ${new BlockStdScope({
                 store: syncedDoc,
-                extensions: this._buildPreviewSpec('preview:page'),
+                extensions: this._buildPreviewSpec('preview-page'),
               }).render()}
             </div>
           `,
@@ -81,7 +81,7 @@ export class EmbedEdgelessSyncedDocBlockComponent extends toEdgelessEmbedBlock(
             <div class="affine-edgeless-viewport" data-theme=${edgelessTheme}>
               ${new BlockStdScope({
                 store: syncedDoc,
-                extensions: this._buildPreviewSpec('preview:edgeless'),
+                extensions: this._buildPreviewSpec('preview-edgeless'),
               }).render()}
             </div>
           `,
diff --git a/blocksuite/affine/blocks/embed/src/embed-synced-doc-block/embed-synced-doc-block.ts b/blocksuite/affine/blocks/embed/src/embed-synced-doc-block/embed-synced-doc-block.ts
index c31d6e4dad..467f78f532 100644
--- a/blocksuite/affine/blocks/embed/src/embed-synced-doc-block/embed-synced-doc-block.ts
+++ b/blocksuite/affine/blocks/embed/src/embed-synced-doc-block/embed-synced-doc-block.ts
@@ -1,4 +1,5 @@
 import { Peekable } from '@blocksuite/affine-components/peek';
+import { ViewExtensionManagerIdentifier } from '@blocksuite/affine-ext-loader';
 import {
   type DocLinkClickedEvent,
   RefNodeSlotsProvider,
@@ -20,10 +21,7 @@ import {
   ThemeExtensionIdentifier,
   ThemeProvider,
 } from '@blocksuite/affine-shared/services';
-import {
-  cloneReferenceInfo,
-  SpecProvider,
-} from '@blocksuite/affine-shared/utils';
+import { cloneReferenceInfo } from '@blocksuite/affine-shared/utils';
 import { Bound, getCommonBound } from '@blocksuite/global/gfx';
 import {
   BlockSelection,
@@ -113,9 +111,10 @@ export class EmbedSyncedDocBlockComponent extends EmbedBlockComponent<EmbedSynce
     ],
   };
 
-  protected _buildPreviewSpec = (name: 'preview:page' | 'preview:edgeless') => {
+  protected _buildPreviewSpec = (name: 'preview-page' | 'preview-edgeless') => {
     const nextDepth = this.depth + 1;
-    const previewSpecBuilder = SpecProvider._.getSpec(name);
+    const viewExtensionManager = this.std.get(ViewExtensionManagerIdentifier);
+    const previewSpec = viewExtensionManager.get(name);
     const currentDisposables = this.disposables;
     const editorSetting = this.std.getOptional(EditorSettingProvider) ?? {
       setting$: signal(GeneralSettingSchema.parse({})),
@@ -157,13 +156,11 @@ export class EmbedSyncedDocBlockComponent extends EmbedBlockComponent<EmbedSynce
       }
     }
 
-    previewSpecBuilder.extend([
+    return previewSpec.concat([
       EmbedSyncedDocWatcher,
       GfxViewportInitializer,
       EditorSettingExtension(editorSetting),
     ]);
-
-    return previewSpecBuilder.value;
   };
 
   protected _renderSyncedView = () => {
@@ -204,7 +201,7 @@ export class EmbedSyncedDocBlockComponent extends EmbedBlockComponent<EmbedSynce
             <div class="affine-page-viewport" data-theme=${appTheme}>
               ${new BlockStdScope({
                 store: syncedDoc,
-                extensions: this._buildPreviewSpec('preview:page'),
+                extensions: this._buildPreviewSpec('preview-page'),
               }).render()}
             </div>
           `,
@@ -215,7 +212,7 @@ export class EmbedSyncedDocBlockComponent extends EmbedBlockComponent<EmbedSynce
             <div class="affine-edgeless-viewport" data-theme=${edgelessTheme}>
               ${new BlockStdScope({
                 store: syncedDoc,
-                extensions: this._buildPreviewSpec('preview:edgeless'),
+                extensions: this._buildPreviewSpec('preview-edgeless'),
               }).render()}
             </div>
           `,
diff --git a/blocksuite/affine/blocks/surface-ref/package.json b/blocksuite/affine/blocks/surface-ref/package.json
index d130cd07c1..b57d48fac2 100644
--- a/blocksuite/affine/blocks/surface-ref/package.json
+++ b/blocksuite/affine/blocks/surface-ref/package.json
@@ -13,6 +13,7 @@
     "@blocksuite/affine-block-frame": "workspace:*",
     "@blocksuite/affine-block-surface": "workspace:*",
     "@blocksuite/affine-components": "workspace:*",
+    "@blocksuite/affine-ext-loader": "workspace:*",
     "@blocksuite/affine-inline-reference": "workspace:*",
     "@blocksuite/affine-model": "workspace:*",
     "@blocksuite/affine-shared": "workspace:*",
diff --git a/blocksuite/affine/blocks/surface-ref/src/portal/note.ts b/blocksuite/affine/blocks/surface-ref/src/portal/note.ts
index a80637743a..5089bfc072 100644
--- a/blocksuite/affine/blocks/surface-ref/src/portal/note.ts
+++ b/blocksuite/affine/blocks/surface-ref/src/portal/note.ts
@@ -1,4 +1,5 @@
 import type { CanvasRenderer } from '@blocksuite/affine-block-surface';
+import { ViewExtensionManagerIdentifier } from '@blocksuite/affine-ext-loader';
 import type { NoteBlockModel } from '@blocksuite/affine-model';
 import {
   DefaultTheme,
@@ -10,7 +11,6 @@ import {
   EDGELESS_BLOCK_CHILD_PADDING,
 } from '@blocksuite/affine-shared/consts';
 import { ThemeProvider } from '@blocksuite/affine-shared/services';
-import { SpecProvider } from '@blocksuite/affine-shared/utils';
 import { deserializeXYWH } from '@blocksuite/global/gfx';
 import { WithDisposable } from '@blocksuite/global/lit';
 import {
@@ -122,10 +122,12 @@ export class SurfaceRefNotePortal extends WithDisposable(ShadowlessElement) {
       query: this.query,
       readonly: true,
     });
-    const previewSpec = SpecProvider._.getSpec('preview:page');
+    const previewSpec = this.host.std
+      .get(ViewExtensionManagerIdentifier)
+      .get('preview-page');
     return new BlockStdScope({
       store: doc,
-      extensions: previewSpec.value.slice(),
+      extensions: previewSpec,
     }).render();
   }
 
diff --git a/blocksuite/affine/blocks/surface-ref/src/surface-ref-block.ts b/blocksuite/affine/blocks/surface-ref/src/surface-ref-block.ts
index f93c8b5478..4556971f78 100644
--- a/blocksuite/affine/blocks/surface-ref/src/surface-ref-block.ts
+++ b/blocksuite/affine/blocks/surface-ref/src/surface-ref-block.ts
@@ -6,6 +6,7 @@ import {
 import type { BlockCaptionEditor } from '@blocksuite/affine-components/caption';
 import { whenHover } from '@blocksuite/affine-components/hover';
 import { Peekable } from '@blocksuite/affine-components/peek';
+import { ViewExtensionManagerIdentifier } from '@blocksuite/affine-ext-loader';
 import { RefNodeSlotsProvider } from '@blocksuite/affine-inline-reference';
 import {
   FrameBlockModel,
@@ -20,10 +21,7 @@ import {
   ViewportElementExtension,
 } from '@blocksuite/affine-shared/services';
 import { unsafeCSSVarV2 } from '@blocksuite/affine-shared/theme';
-import {
-  requestConnectedFrame,
-  SpecProvider,
-} from '@blocksuite/affine-shared/utils';
+import { requestConnectedFrame } from '@blocksuite/affine-shared/utils';
 import { DisposableGroup } from '@blocksuite/global/disposable';
 import { BlockSuiteError, ErrorCode } from '@blocksuite/global/exceptions';
 import {
@@ -46,7 +44,7 @@ import {
   type GfxModel,
   GfxPrimitiveElementModel,
 } from '@blocksuite/std/gfx';
-import type { BaseSelection, Store } from '@blocksuite/store';
+import type { BaseSelection, ExtensionType, Store } from '@blocksuite/store';
 import { effect, signal } from '@preact/signals-core';
 import { css, html, nothing } from 'lit';
 import { query } from 'lit/decorators.js';
@@ -114,9 +112,18 @@ export class SurfaceRefBlockComponent extends BlockComponent<SurfaceRefBlockMode
 
   private _previewDoc: Store | null = null;
 
-  private readonly _previewSpec = SpecProvider._.getSpec(
-    'preview:edgeless'
-  ).extend([ViewportElementExtension('.ref-viewport')]);
+  private _runtimePreviewExt: ExtensionType[] = [];
+
+  private get _viewExtensionManager() {
+    return this.std.get(ViewExtensionManagerIdentifier);
+  }
+
+  private get _previewSpec() {
+    return [
+      ...this._viewExtensionManager.get('preview-edgeless'),
+      ViewportElementExtension('.ref-viewport'),
+    ];
+  }
 
   private _referencedModel: GfxModel | null = null;
 
@@ -338,7 +345,7 @@ export class SurfaceRefBlockComponent extends BlockComponent<SurfaceRefBlockMode
       }
     }
 
-    this._previewSpec.extend([SurfaceRefViewportWatcher]);
+    this._runtimePreviewExt = [SurfaceRefViewportWatcher];
   }
 
   private _initHover() {
@@ -366,7 +373,7 @@ export class SurfaceRefBlockComponent extends BlockComponent<SurfaceRefBlockMode
 
   private _renderRefContent(referencedModel: GfxModel) {
     const [, , w, h] = deserializeXYWH(referencedModel.xywh);
-    const _previewSpec = this._previewSpec.value;
+    const _previewSpec = this._previewSpec.concat(this._runtimePreviewExt);
 
     return html`<div class="ref-content">
       <div
diff --git a/blocksuite/affine/blocks/surface-ref/tsconfig.json b/blocksuite/affine/blocks/surface-ref/tsconfig.json
index ae9e5c350c..de776f583f 100644
--- a/blocksuite/affine/blocks/surface-ref/tsconfig.json
+++ b/blocksuite/affine/blocks/surface-ref/tsconfig.json
@@ -10,6 +10,7 @@
     { "path": "../frame" },
     { "path": "../surface" },
     { "path": "../../components" },
+    { "path": "../../ext-loader" },
     { "path": "../../inlines/reference" },
     { "path": "../../model" },
     { "path": "../../shared" },
diff --git a/blocksuite/affine/ext-loader/src/__tests__/ext-loader.unit.spec.ts b/blocksuite/affine/ext-loader/src/__tests__/ext-loader.unit.spec.ts
index ae945ed9e9..f314b63f71 100644
--- a/blocksuite/affine/ext-loader/src/__tests__/ext-loader.unit.spec.ts
+++ b/blocksuite/affine/ext-loader/src/__tests__/ext-loader.unit.spec.ts
@@ -54,14 +54,17 @@ describe('multiple scopes', () => {
   class ViewExt1 extends ViewExtensionProvider {
     override name = 'ViewExt1';
 
-    override setup(context: ViewExtensionContext) {
-      super.setup(context);
+    constructor() {
+      super();
+      setup1();
+    }
+
+    override setup(context: ViewExtensionContext, option?: { foo: number }) {
+      super.setup(context, option);
       if (context.scope === 'page') {
-        setup1();
         context.register(Ext2);
       }
       if (context.scope === 'edgeless') {
-        setup2();
         context.register(Ext3);
       }
     }
@@ -69,6 +72,11 @@ describe('multiple scopes', () => {
   class ViewExt2 extends ViewExtensionProvider {
     override name = 'ViewExt2';
 
+    constructor() {
+      super();
+      setup2();
+    }
+
     override setup(context: ViewExtensionContext) {
       super.setup(context);
       if (context.scope === 'page') {
@@ -87,7 +95,7 @@ describe('multiple scopes', () => {
     expect(edgelessExtensions).toEqual([Ext3, Ext5]);
   });
 
-  it('should setup be cached', () => {
+  it('should cache provider instances', () => {
     manager.get('page');
     manager.get('edgeless');
     expect(setup1).toHaveBeenCalledTimes(1);
diff --git a/blocksuite/affine/ext-loader/src/manager.ts b/blocksuite/affine/ext-loader/src/manager.ts
index 661e2d20db..da7857e039 100644
--- a/blocksuite/affine/ext-loader/src/manager.ts
+++ b/blocksuite/affine/ext-loader/src/manager.ts
@@ -84,16 +84,17 @@ export class ExtensionManager<Scope extends string> {
 
   /**
    * Retrieves all extensions registered for a specific scope.
-   * If the scope hasn't been built yet, it triggers the build process.
+   * It triggers the build process.
    *
    * @param scope - The scope to retrieve extensions for
    * @returns An array of extensions registered for the specified scope
    * @throws {BlockSuiteError} If the scope is not found
    */
   get(scope: Scope) {
-    if (!this._extensions.has(scope)) {
-      this._build(scope);
+    if (this._extensions.has(scope)) {
+      this._extensions.delete(scope);
     }
+    this._build(scope);
     const extensionSet = this._extensions.get(scope);
     if (!extensionSet) {
       throw new BlockSuiteError(
@@ -117,14 +118,19 @@ export class ExtensionManager<Scope extends string> {
     provider: typeof BaseExtensionProvider<Scope, T>,
     options: ((prev: T | undefined) => T | undefined) | T | undefined
   ) {
+    const prev = this._providerOptions.get(provider);
+
     let config: T | undefined;
     if (typeof options === 'function') {
-      const prev = this._providerOptions.get(provider);
       config = (options as (prev: unknown) => T)(prev);
     } else {
       config = options;
     }
 
+    if (prev === config) {
+      return;
+    }
+
     if (config === undefined) {
       this._providerOptions.delete(provider);
     } else {
diff --git a/blocksuite/affine/fragments/frame-panel/package.json b/blocksuite/affine/fragments/frame-panel/package.json
index c5db24a79f..051485adc0 100644
--- a/blocksuite/affine/fragments/frame-panel/package.json
+++ b/blocksuite/affine/fragments/frame-panel/package.json
@@ -13,6 +13,7 @@
     "@blocksuite/affine-block-frame": "workspace:*",
     "@blocksuite/affine-block-surface": "workspace:*",
     "@blocksuite/affine-components": "workspace:*",
+    "@blocksuite/affine-ext-loader": "workspace:*",
     "@blocksuite/affine-model": "workspace:*",
     "@blocksuite/affine-rich-text": "workspace:*",
     "@blocksuite/affine-shared": "workspace:*",
diff --git a/blocksuite/affine/fragments/frame-panel/src/card/frame-preview.ts b/blocksuite/affine/fragments/frame-panel/src/card/frame-preview.ts
index 3db44beac0..8399a19bca 100644
--- a/blocksuite/affine/fragments/frame-panel/src/card/frame-preview.ts
+++ b/blocksuite/affine/fragments/frame-panel/src/card/frame-preview.ts
@@ -1,10 +1,10 @@
+import { ViewExtensionManagerIdentifier } from '@blocksuite/affine-ext-loader';
 import type { FrameBlockModel } from '@blocksuite/affine-model';
 import {
   DocModeExtension,
   DocModeProvider,
   ViewportElementExtension,
 } from '@blocksuite/affine-shared/services';
-import { SpecProvider } from '@blocksuite/affine-shared/utils';
 import { DisposableGroup } from '@blocksuite/global/disposable';
 import { Bound, deserializeXYWH } from '@blocksuite/global/gfx';
 import { WithDisposable } from '@blocksuite/global/lit';
@@ -15,13 +15,12 @@ import {
   ShadowlessElement,
 } from '@blocksuite/std';
 import { GfxControllerIdentifier } from '@blocksuite/std/gfx';
-import { type Query, type Store } from '@blocksuite/store';
+import { type ExtensionType, type Query, type Store } from '@blocksuite/store';
 import { css, html, nothing, type PropertyValues } from 'lit';
 import { property, query, state } from 'lit/decorators.js';
 import { guard } from 'lit/directives/guard.js';
 import { styleMap } from 'lit/directives/style-map.js';
 import debounce from 'lodash-es/debounce';
-
 const DEFAULT_PREVIEW_CONTAINER_WIDTH = 280;
 const DEFAULT_PREVIEW_CONTAINER_HEIGHT = 166;
 
@@ -86,7 +85,15 @@ export class FramePreview extends WithDisposable(ShadowlessElement) {
 
   private _previewDoc: Store | null = null;
 
-  private readonly _previewSpec = SpecProvider._.getSpec('preview:edgeless');
+  private _runtimePreviewExt: ExtensionType[] = [];
+
+  private get _viewExtensionManager() {
+    return this.std.get(ViewExtensionManagerIdentifier);
+  }
+
+  private get _previewSpec() {
+    return this._viewExtensionManager.get('preview-edgeless');
+  }
 
   private readonly _updateFrameViewportWH = () => {
     const [, , w, h] = deserializeXYWH(this.frame.xywh);
@@ -143,11 +150,11 @@ export class FramePreview extends WithDisposable(ShadowlessElement) {
     }
 
     const docModeService = this.std.get(DocModeProvider);
-    this._previewSpec.extend([
+    this._runtimePreviewExt = [
       ViewportElementExtension('.frame-preview-viewport'),
       FramePreviewWatcher,
       DocModeExtension(docModeService),
-    ]);
+    ];
   }
 
   private _refreshViewport() {
@@ -163,7 +170,7 @@ export class FramePreview extends WithDisposable(ShadowlessElement) {
   private _renderSurfaceContent() {
     const { width, height } = this.frameViewportWH;
 
-    const _previewSpec = this._previewSpec.value;
+    const _previewSpec = this._previewSpec.concat(this._runtimePreviewExt);
     return html`<div
       class="frame-preview-surface-container"
       style=${styleMap({
diff --git a/blocksuite/affine/fragments/frame-panel/tsconfig.json b/blocksuite/affine/fragments/frame-panel/tsconfig.json
index 3116812f2d..b82c1a4135 100644
--- a/blocksuite/affine/fragments/frame-panel/tsconfig.json
+++ b/blocksuite/affine/fragments/frame-panel/tsconfig.json
@@ -10,6 +10,7 @@
     { "path": "../../blocks/frame" },
     { "path": "../../blocks/surface" },
     { "path": "../../components" },
+    { "path": "../../ext-loader" },
     { "path": "../../model" },
     { "path": "../../rich-text" },
     { "path": "../../shared" },
diff --git a/blocksuite/affine/shared/src/services/editor-setting-service.ts b/blocksuite/affine/shared/src/services/editor-setting-service.ts
index e01f399ea9..77780fec57 100644
--- a/blocksuite/affine/shared/src/services/editor-setting-service.ts
+++ b/blocksuite/affine/shared/src/services/editor-setting-service.ts
@@ -35,7 +35,7 @@ export function EditorSettingExtension(
 ): ExtensionType {
   return {
     setup: di => {
-      di.addImpl(EditorSettingProvider, () => service);
+      di.override(EditorSettingProvider, () => service);
     },
   };
 }
diff --git a/blocksuite/affine/widgets/drag-handle/package.json b/blocksuite/affine/widgets/drag-handle/package.json
index 33ad908da8..82e205cb07 100644
--- a/blocksuite/affine/widgets/drag-handle/package.json
+++ b/blocksuite/affine/widgets/drag-handle/package.json
@@ -17,6 +17,7 @@
     "@blocksuite/affine-block-paragraph": "workspace:*",
     "@blocksuite/affine-block-surface": "workspace:*",
     "@blocksuite/affine-components": "workspace:*",
+    "@blocksuite/affine-ext-loader": "workspace:*",
     "@blocksuite/affine-model": "workspace:*",
     "@blocksuite/affine-shared": "workspace:*",
     "@blocksuite/global": "workspace:*",
diff --git a/blocksuite/affine/widgets/drag-handle/src/helpers/preview-helper.ts b/blocksuite/affine/widgets/drag-handle/src/helpers/preview-helper.ts
index f1037f675b..39fafe5553 100644
--- a/blocksuite/affine/widgets/drag-handle/src/helpers/preview-helper.ts
+++ b/blocksuite/affine/widgets/drag-handle/src/helpers/preview-helper.ts
@@ -1,10 +1,10 @@
+import { ViewExtensionManagerIdentifier } from '@blocksuite/affine-ext-loader';
 import {
   DocModeExtension,
   DocModeProvider,
   EditorSettingExtension,
   EditorSettingProvider,
 } from '@blocksuite/affine-shared/services';
-import { SpecProvider } from '@blocksuite/affine-shared/utils';
 import { BlockStdScope, BlockViewIdentifier } from '@blocksuite/std';
 import type {
   BlockModel,
@@ -69,7 +69,9 @@ export class PreviewHelper {
     const editorSetting = std.get(EditorSettingProvider);
     const query = this._calculateQuery(blockIds as string[]);
     const store = widget.doc.doc.getStore({ query });
-    const previewSpec = SpecProvider._.getSpec('preview:page');
+    let previewSpec = widget.std
+      .get(ViewExtensionManagerIdentifier)
+      .get('preview-page');
     const settingSignal = signal({ ...editorSetting.setting$.peek() });
     const extensions = [
       DocModeExtension(docModeService),
@@ -99,7 +101,7 @@ export class PreviewHelper {
       } as ExtensionType,
     ];
 
-    previewSpec.extend(extensions);
+    previewSpec = previewSpec.concat(extensions);
 
     settingSignal.value = {
       ...settingSignal.value,
@@ -108,7 +110,7 @@ export class PreviewHelper {
 
     const previewStd = new BlockStdScope({
       store,
-      extensions: previewSpec.value,
+      extensions: previewSpec,
     });
 
     let width: number = 500;
diff --git a/blocksuite/affine/widgets/drag-handle/tsconfig.json b/blocksuite/affine/widgets/drag-handle/tsconfig.json
index 51215efe4e..89887c9a74 100644
--- a/blocksuite/affine/widgets/drag-handle/tsconfig.json
+++ b/blocksuite/affine/widgets/drag-handle/tsconfig.json
@@ -14,6 +14,7 @@
     { "path": "../../blocks/paragraph" },
     { "path": "../../blocks/surface" },
     { "path": "../../components" },
+    { "path": "../../ext-loader" },
     { "path": "../../model" },
     { "path": "../../shared" },
     { "path": "../../../framework/global" },
diff --git a/blocksuite/integration-test/package.json b/blocksuite/integration-test/package.json
index d1b0d35711..569eacc957 100644
--- a/blocksuite/integration-test/package.json
+++ b/blocksuite/integration-test/package.json
@@ -28,7 +28,9 @@
   },
   "exports": {
     ".": "./src/index.ts",
-    "./effects": "./src/effects.ts"
+    "./effects": "./src/effects.ts",
+    "./store": "./src/store.ts",
+    "./view": "./src/view.ts"
   },
   "files": [
     "src",
diff --git a/blocksuite/integration-test/src/__tests__/utils/setup.ts b/blocksuite/integration-test/src/__tests__/utils/setup.ts
index cfc27eaee0..af06acd4df 100644
--- a/blocksuite/integration-test/src/__tests__/utils/setup.ts
+++ b/blocksuite/integration-test/src/__tests__/utils/setup.ts
@@ -1,13 +1,7 @@
 import '@toeverything/theme/style.css';
 import '@toeverything/theme/fonts.css';
 
-import { effects as blocksEffects } from '@blocksuite/affine/effects';
-import {
-  EdgelessEditorBlockSpecs,
-  PageEditorBlockSpecs,
-  registerStoreSpecs,
-  StoreExtensions,
-} from '@blocksuite/affine/extensions';
+import { registerStoreSpecs } from '@blocksuite/affine/extensions';
 import type { DocMode } from '@blocksuite/affine/model';
 import { AffineSchemas } from '@blocksuite/affine/schemas';
 import {
@@ -27,11 +21,17 @@ import {
 
 import { effects } from '../../effects.js';
 import { TestAffineEditorContainer } from '../../index.js';
+import { getTestStoreManager } from '../../store.js';
+import { getTestViewManager } from '../../view.js';
 
+// FIXME: used for test import/export
 registerStoreSpecs();
-blocksEffects();
+const storeManager = getTestStoreManager();
+const viewManager = getTestViewManager();
 effects();
 
+const storeExtensions = storeManager.get('store');
+
 export function getRenderer() {
   return editor.std.get(
     ViewportTurboRendererIdentifier
@@ -85,12 +85,12 @@ async function createEditor(
   editor.doc = doc;
   editor.mode = mode;
   editor.pageSpecs = [
-    ...PageEditorBlockSpecs,
+    ...viewManager.get('page'),
     FontConfigExtension(CommunityCanvasTextFonts),
     ...extensions,
   ];
   editor.edgelessSpecs = [
-    ...EdgelessEditorBlockSpecs,
+    ...viewManager.get('edgeless'),
     FontConfigExtension(CommunityCanvasTextFonts),
     ...extensions,
   ];
@@ -123,7 +123,7 @@ export async function setupEditor(
   extensions: ExtensionType[] = []
 ) {
   const collection = new TestWorkspace(createCollectionOptions());
-  collection.storeExtensions = StoreExtensions;
+  collection.storeExtensions = storeExtensions;
   collection.meta.initialize();
 
   window.collection = collection;
diff --git a/blocksuite/integration-test/src/store.ts b/blocksuite/integration-test/src/store.ts
new file mode 100644
index 0000000000..63afa01014
--- /dev/null
+++ b/blocksuite/integration-test/src/store.ts
@@ -0,0 +1,7 @@
+import { StoreExtensionManager } from '@blocksuite/affine/ext-loader';
+import { MigratingStoreExtension } from '@blocksuite/affine/extensions/store';
+
+export function getTestStoreManager() {
+  const manager = new StoreExtensionManager([MigratingStoreExtension]);
+  return manager;
+}
diff --git a/blocksuite/integration-test/src/view.ts b/blocksuite/integration-test/src/view.ts
new file mode 100644
index 0000000000..fa89a7c729
--- /dev/null
+++ b/blocksuite/integration-test/src/view.ts
@@ -0,0 +1,7 @@
+import { ViewExtensionManager } from '@blocksuite/affine/ext-loader';
+import { MigratingViewExtension } from '@blocksuite/affine/extensions/view';
+
+export function getTestViewManager() {
+  const manager = new ViewExtensionManager([MigratingViewExtension]);
+  return manager;
+}
diff --git a/blocksuite/playground/apps/starter/main.ts b/blocksuite/playground/apps/starter/main.ts
index e477728413..b59c2fad0e 100644
--- a/blocksuite/playground/apps/starter/main.ts
+++ b/blocksuite/playground/apps/starter/main.ts
@@ -2,7 +2,6 @@ import '../../style.css';
 
 import * as databaseBlocks from '@blocksuite/affine/blocks/database';
 import * as noteBlocks from '@blocksuite/affine/blocks/note';
-import { effects as blocksEffects } from '@blocksuite/affine/effects';
 import { registerStoreSpecs } from '@blocksuite/affine/extensions';
 import * as globalUtils from '@blocksuite/affine/global/utils';
 import * as services from '@blocksuite/affine/shared/services';
@@ -10,7 +9,8 @@ import * as blockStd from '@blocksuite/affine/std';
 import * as store from '@blocksuite/affine/store';
 import * as affineModel from '@blocksuite/affine-model';
 import * as editor from '@blocksuite/integration-test';
-import { effects as presetsEffects } from '@blocksuite/integration-test/effects';
+import { effects as itEffects } from '@blocksuite/integration-test/effects';
+import { getTestStoreManager } from '@blocksuite/integration-test/store';
 
 import { setupEdgelessTemplate } from '../_common/setup.js';
 import { effects as commentEffects } from '../comment/effects.js';
@@ -22,8 +22,8 @@ import { mountDefaultDocEditor } from './utils/setup-playground';
 import { prepareTestApp } from './utils/test';
 
 registerStoreSpecs();
-blocksEffects();
-presetsEffects();
+itEffects();
+const storeManager = getTestStoreManager();
 commentEffects();
 
 async function main() {
@@ -34,7 +34,7 @@ async function main() {
   const params = new URLSearchParams(location.search);
   const room = params.get('room') ?? Math.random().toString(16).slice(2, 8);
   const isE2E = room.startsWith('playwright');
-  const collection = createStarterDocCollection();
+  const collection = createStarterDocCollection(storeManager);
 
   if (isE2E) {
     Object.defineProperty(window, '$blocksuite', {
diff --git a/blocksuite/playground/apps/starter/utils/collection.ts b/blocksuite/playground/apps/starter/utils/collection.ts
index 3a4dd30dd8..4fed772180 100644
--- a/blocksuite/playground/apps/starter/utils/collection.ts
+++ b/blocksuite/playground/apps/starter/utils/collection.ts
@@ -1,5 +1,5 @@
+import type { StoreExtensionManager } from '@blocksuite/affine/ext-loader';
 import { AffineSchemas } from '@blocksuite/affine/schemas';
-import { SpecProvider } from '@blocksuite/affine/shared/utils';
 import { nanoid, Schema, Transformer } from '@blocksuite/affine/store';
 import {
   createAutoIncrementIdGenerator,
@@ -23,7 +23,9 @@ const room = params.get('room');
 const isE2E = room?.startsWith('playwright');
 const blobSourceArgs = (params.get('blobSource') ?? '').split(',');
 
-export function createStarterDocCollection() {
+export function createStarterDocCollection(
+  storeExtensionManager: StoreExtensionManager
+) {
   const collectionId = room ?? 'starter';
   const schema = new Schema();
   schema.register(AffineSchemas);
@@ -56,7 +58,7 @@ export function createStarterDocCollection() {
     blobSources,
   };
   const collection = new TestWorkspace(options);
-  collection.storeExtensions = SpecProvider._.getSpec('store').value;
+  collection.storeExtensions = storeExtensionManager.get('store');
   collection.start();
 
   // debug info
diff --git a/blocksuite/playground/apps/starter/utils/extensions.ts b/blocksuite/playground/apps/starter/utils/extensions.ts
index 8a44f24c38..1c4fc84bb5 100644
--- a/blocksuite/playground/apps/starter/utils/extensions.ts
+++ b/blocksuite/playground/apps/starter/utils/extensions.ts
@@ -1,7 +1,3 @@
-import {
-  EdgelessEditorBlockSpecs,
-  PageEditorBlockSpecs,
-} from '@blocksuite/affine/extensions';
 import { RefNodeSlotsProvider } from '@blocksuite/affine/inlines/reference';
 import {
   CommunityCanvasTextFonts,
@@ -13,6 +9,7 @@ import {
 } from '@blocksuite/affine/shared/services';
 import type { ExtensionType, Store, Workspace } from '@blocksuite/affine/store';
 import { type TestAffineEditorContainer } from '@blocksuite/integration-test';
+import { getTestViewManager } from '@blocksuite/integration-test/view';
 
 import {
   mockDocModeService,
@@ -20,6 +17,8 @@ import {
   mockParseDocUrlService,
 } from '../../_common/mock-services';
 
+const viewManager = getTestViewManager();
+
 export function getTestCommonExtensions(
   editor: TestAffineEditorContainer
 ): ExtensionType[] {
@@ -48,8 +47,8 @@ export function createTestEditor(store: Store, workspace: Workspace) {
   editor.doc = store;
 
   const defaultExtensions = getTestCommonExtensions(editor);
-  editor.pageSpecs = [...PageEditorBlockSpecs, ...defaultExtensions];
-  editor.edgelessSpecs = [...EdgelessEditorBlockSpecs, ...defaultExtensions];
+  editor.pageSpecs = [...viewManager.get('page'), ...defaultExtensions];
+  editor.edgelessSpecs = [...viewManager.get('edgeless'), ...defaultExtensions];
 
   editor.std
     .get(RefNodeSlotsProvider)
diff --git a/packages/frontend/core/src/blocksuite/ai/chat-panel/chat-panel-messages.ts b/packages/frontend/core/src/blocksuite/ai/chat-panel/chat-panel-messages.ts
index 424a53e0d7..5c84a48ca0 100644
--- a/packages/frontend/core/src/blocksuite/ai/chat-panel/chat-panel-messages.ts
+++ b/packages/frontend/core/src/blocksuite/ai/chat-panel/chat-panel-messages.ts
@@ -3,10 +3,9 @@ import {
   DocModeProvider,
   FeatureFlagService,
 } from '@blocksuite/affine/shared/services';
-import { type SpecBuilder } from '@blocksuite/affine/shared/utils';
 import type { EditorHost } from '@blocksuite/affine/std';
 import { ShadowlessElement } from '@blocksuite/affine/std';
-import type { BaseSelection } from '@blocksuite/affine/store';
+import type { BaseSelection, ExtensionType } from '@blocksuite/affine/store';
 import { ArrowDownBigIcon as ArrowDownIcon } from '@blocksuite/icons/lit';
 import { css, html, nothing, type PropertyValues } from 'lit';
 import { property, query, state } from 'lit/decorators.js';
@@ -157,7 +156,7 @@ export class ChatPanelMessages extends WithDisposable(ShadowlessElement) {
   accessor updateContext!: (context: Partial<ChatContextValue>) => void;
 
   @property({ attribute: false })
-  accessor previewSpecBuilder!: SpecBuilder;
+  accessor extensions!: ExtensionType[];
 
   @query('.chat-panel-messages-container')
   accessor messagesContainer: HTMLDivElement | null = null;
@@ -271,7 +270,7 @@ export class ChatPanelMessages extends WithDisposable(ShadowlessElement) {
                     .isLast=${isLast}
                     .status=${isLast ? status : 'idle'}
                     .error=${isLast ? error : null}
-                    .previewSpecBuilder=${this.previewSpecBuilder}
+                    .extensions=${this.extensions}
                     .getSessionId=${this.getSessionId}
                     .retry=${() => this.retry()}
                   ></chat-message-assistant>`;
diff --git a/packages/frontend/core/src/blocksuite/ai/chat-panel/content/rich-text.ts b/packages/frontend/core/src/blocksuite/ai/chat-panel/content/rich-text.ts
index 0668154f24..13d807524e 100644
--- a/packages/frontend/core/src/blocksuite/ai/chat-panel/content/rich-text.ts
+++ b/packages/frontend/core/src/blocksuite/ai/chat-panel/content/rich-text.ts
@@ -1,7 +1,7 @@
 import { WithDisposable } from '@blocksuite/affine/global/lit';
-import type { SpecBuilder } from '@blocksuite/affine/shared/utils';
 import type { EditorHost } from '@blocksuite/affine/std';
 import { ShadowlessElement } from '@blocksuite/affine/std';
+import type { ExtensionType } from '@blocksuite/affine/store';
 import { html } from 'lit';
 import { property } from 'lit/decorators.js';
 
@@ -18,13 +18,13 @@ export class ChatContentRichText extends WithDisposable(ShadowlessElement) {
   accessor state: 'finished' | 'generating' = 'finished';
 
   @property({ attribute: false })
-  accessor previewSpecBuilder!: SpecBuilder;
+  accessor extensions!: ExtensionType[];
 
   protected override render() {
     const { text, host } = this;
     return html`${createTextRenderer(host, {
       customHeading: true,
-      extensions: this.previewSpecBuilder.value,
+      extensions: this.extensions,
     })(text, this.state)}`;
   }
 }
diff --git a/packages/frontend/core/src/blocksuite/ai/chat-panel/index.ts b/packages/frontend/core/src/blocksuite/ai/chat-panel/index.ts
index 7e49bf4bfb..ce1f2623fa 100644
--- a/packages/frontend/core/src/blocksuite/ai/chat-panel/index.ts
+++ b/packages/frontend/core/src/blocksuite/ai/chat-panel/index.ts
@@ -2,10 +2,9 @@ import './chat-panel-messages';
 
 import type { ContextEmbedStatus } from '@affine/graphql';
 import { SignalWatcher, WithDisposable } from '@blocksuite/affine/global/lit';
-import type { SpecBuilder } from '@blocksuite/affine/shared/utils';
 import type { EditorHost } from '@blocksuite/affine/std';
 import { ShadowlessElement } from '@blocksuite/affine/std';
-import type { Store } from '@blocksuite/affine/store';
+import type { ExtensionType, Store } from '@blocksuite/affine/store';
 import { HelpIcon } from '@blocksuite/icons/lit';
 import { type Signal, signal } from '@preact/signals-core';
 import { css, html, type PropertyValues } from 'lit';
@@ -208,7 +207,7 @@ export class ChatPanel extends SignalWatcher(
   accessor docDisplayConfig!: DocDisplayConfig;
 
   @property({ attribute: false })
-  accessor previewSpecBuilder!: SpecBuilder;
+  accessor extensions!: ExtensionType[];
 
   @state()
   accessor isLoading = false;
@@ -401,7 +400,7 @@ export class ChatPanel extends SignalWatcher(
         .updateContext=${this.updateContext}
         .host=${this.host}
         .isLoading=${this.isLoading}
-        .previewSpecBuilder=${this.previewSpecBuilder}
+        .extensions=${this.extensions}
       ></chat-panel-messages>
       <ai-chat-composer
         .host=${this.host}
diff --git a/packages/frontend/core/src/blocksuite/ai/chat-panel/message/assistant.ts b/packages/frontend/core/src/blocksuite/ai/chat-panel/message/assistant.ts
index add1883d58..3140d63864 100644
--- a/packages/frontend/core/src/blocksuite/ai/chat-panel/message/assistant.ts
+++ b/packages/frontend/core/src/blocksuite/ai/chat-panel/message/assistant.ts
@@ -5,6 +5,7 @@ import { WithDisposable } from '@blocksuite/affine/global/lit';
 import { isInsidePageEditor } from '@blocksuite/affine/shared/utils';
 import type { EditorHost } from '@blocksuite/affine/std';
 import { ShadowlessElement } from '@blocksuite/affine/std';
+import type { ExtensionType } from '@blocksuite/affine/store';
 import { css, html, nothing } from 'lit';
 import { property } from 'lit/decorators.js';
 
@@ -44,7 +45,7 @@ export class ChatMessageAssistant extends WithDisposable(ShadowlessElement) {
   accessor error: AIError | null = null;
 
   @property({ attribute: false })
-  accessor previewSpecBuilder: any;
+  accessor extensions!: ExtensionType[];
 
   @property({ attribute: false })
   accessor getSessionId!: () => Promise<string | undefined>;
@@ -90,7 +91,7 @@ export class ChatMessageAssistant extends WithDisposable(ShadowlessElement) {
         .host=${host}
         .text=${item.content}
         .state=${state}
-        .previewSpecBuilder=${this.previewSpecBuilder}
+        .extensions=${this.extensions}
       ></chat-content-rich-text>
       ${shouldRenderError ? AIChatErrorRenderer(host, error) : nothing}
       ${this.renderEditorActions()}
diff --git a/packages/frontend/core/src/blocksuite/ai/components/text-renderer.ts b/packages/frontend/core/src/blocksuite/ai/components/text-renderer.ts
index 2532f37751..5146257242 100644
--- a/packages/frontend/core/src/blocksuite/ai/components/text-renderer.ts
+++ b/packages/frontend/core/src/blocksuite/ai/components/text-renderer.ts
@@ -43,6 +43,18 @@ import type {
   AffineAIPanelWidgetConfig,
 } from '../widgets/ai-panel/type';
 
+export const CustomPageEditorBlockSpecs: ExtensionType[] = [
+  ...PageEditorBlockSpecs,
+  {
+    setup: di => {
+      di.override(
+        BlockViewIdentifier('affine:page'),
+        () => literal`affine-page-root`
+      );
+    },
+  },
+];
+
 const customHeadingStyles = css`
   .custom-heading {
     .h1 {
@@ -91,18 +103,6 @@ export type TextRendererOptions = {
   testId?: string;
 };
 
-export const CustomPageEditorBlockSpecs: ExtensionType[] = [
-  ...PageEditorBlockSpecs,
-  {
-    setup: di => {
-      di.override(
-        BlockViewIdentifier('affine:page'),
-        () => literal`affine-page-root`
-      );
-    },
-  },
-];
-
 // todo: refactor it for more general purpose usage instead of AI only?
 export class TextRenderer extends WithDisposable(ShadowlessElement) {
   static override styles = css`
diff --git a/packages/frontend/core/src/blocksuite/ai/extensions/ai-code.ts b/packages/frontend/core/src/blocksuite/ai/extensions/ai-code.ts
index 5d27584bcd..795102e246 100644
--- a/packages/frontend/core/src/blocksuite/ai/extensions/ai-code.ts
+++ b/packages/frontend/core/src/blocksuite/ai/extensions/ai-code.ts
@@ -7,7 +7,7 @@ import type { ExtensionType } from '@blocksuite/affine/store';
 
 import { setupCodeToolbarAIEntry } from '../entries/code-toolbar/setup-code-toolbar';
 
-class AICodeBlockWatcher extends LifeCycleWatcher {
+export class AICodeBlockWatcher extends LifeCycleWatcher {
   static override key = 'ai-code-block-watcher';
 
   override mounted() {
diff --git a/packages/frontend/core/src/blocksuite/ai/extensions/ai-edgeless-root.ts b/packages/frontend/core/src/blocksuite/ai/extensions/ai-edgeless-root.ts
index d2f8bbcf62..a570648f7c 100644
--- a/packages/frontend/core/src/blocksuite/ai/extensions/ai-edgeless-root.ts
+++ b/packages/frontend/core/src/blocksuite/ai/extensions/ai-edgeless-root.ts
@@ -47,7 +47,7 @@ export function createAIEdgelessRootBlockSpec(
   ];
 }
 
-function getAIEdgelessRootWatcher(framework: FrameworkProvider) {
+export function getAIEdgelessRootWatcher(framework: FrameworkProvider) {
   class AIEdgelessRootWatcher extends LifeCycleWatcher {
     static override key = 'ai-edgeless-root-watcher';
 
diff --git a/packages/frontend/core/src/blocksuite/ai/extensions/ai-page-root.ts b/packages/frontend/core/src/blocksuite/ai/extensions/ai-page-root.ts
index b221fdc7af..dccd3aaa1f 100644
--- a/packages/frontend/core/src/blocksuite/ai/extensions/ai-page-root.ts
+++ b/packages/frontend/core/src/blocksuite/ai/extensions/ai-page-root.ts
@@ -16,7 +16,7 @@ import {
 } from '../widgets/ai-panel/ai-panel';
 import { AiSlashMenuConfigExtension } from './ai-slash-menu';
 
-function getAIPageRootWatcher(framework: FrameworkProvider) {
+export function getAIPageRootWatcher(framework: FrameworkProvider) {
   class AIPageRootWatcher extends LifeCycleWatcher {
     static override key = 'ai-page-root-watcher';
 
diff --git a/packages/frontend/core/src/blocksuite/ai/messages/slides-renderer.ts b/packages/frontend/core/src/blocksuite/ai/messages/slides-renderer.ts
index ad7aaf93b9..6c4bf6d3f5 100644
--- a/packages/frontend/core/src/blocksuite/ai/messages/slides-renderer.ts
+++ b/packages/frontend/core/src/blocksuite/ai/messages/slides-renderer.ts
@@ -1,6 +1,6 @@
 import { WorkspaceImpl } from '@affine/core/modules/workspace/impls/workspace';
+import { ViewExtensionManagerIdentifier } from '@blocksuite/affine/ext-loader';
 import { WithDisposable } from '@blocksuite/affine/global/lit';
-import { SpecProvider } from '@blocksuite/affine/shared/utils';
 import { BlockStdScope, type EditorHost } from '@blocksuite/affine/std';
 import type { Store } from '@blocksuite/affine/store';
 import { css, html, LitElement, nothing } from 'lit';
@@ -91,6 +91,12 @@ export class AISlidesRenderer extends WithDisposable(LitElement) {
     });
   }
 
+  protected _getExtensions() {
+    return this.host.std
+      .get(ViewExtensionManagerIdentifier)
+      .get('preview-edgeless');
+  }
+
   protected override render() {
     return html`<style>
         .slides-container {
@@ -205,7 +211,7 @@ export class AISlidesRenderer extends WithDisposable(LitElement) {
         >
           ${new BlockStdScope({
             store: this._doc,
-            extensions: SpecProvider._.getSpec('preview:edgeless').value,
+            extensions: this._getExtensions(),
           }).render()}
         </div>
         <div class="mask"></div>
diff --git a/packages/frontend/core/src/blocksuite/ai/peek-view/chat-block-peek-view.ts b/packages/frontend/core/src/blocksuite/ai/peek-view/chat-block-peek-view.ts
index 14a4552f6a..30e624f8dc 100644
--- a/packages/frontend/core/src/blocksuite/ai/peek-view/chat-block-peek-view.ts
+++ b/packages/frontend/core/src/blocksuite/ai/peek-view/chat-block-peek-view.ts
@@ -4,12 +4,13 @@ import {
   EdgelessCRUDIdentifier,
   getSurfaceBlock,
 } from '@blocksuite/affine/blocks/surface';
+import { ViewExtensionManagerIdentifier } from '@blocksuite/affine/ext-loader';
 import { ConnectorMode } from '@blocksuite/affine/model';
 import {
   DocModeProvider,
   TelemetryProvider,
 } from '@blocksuite/affine/shared/services';
-import type { Signal, SpecBuilder } from '@blocksuite/affine/shared/utils';
+import type { Signal } from '@blocksuite/affine/shared/utils';
 import type { EditorHost } from '@blocksuite/affine/std';
 import { signal } from '@preact/signals-core';
 import { html, LitElement, nothing } from 'lit';
@@ -437,9 +438,11 @@ export class AIChatBlockPeekView extends LitElement {
 
   override connectedCallback() {
     super.connectedCallback();
-    this._textRendererOptions = {
-      extensions: this.previewSpecBuilder.value,
-    };
+    const extensions = this.host.std
+      .get(ViewExtensionManagerIdentifier)
+      .get('preview-page');
+
+    this._textRendererOptions = { extensions };
     this._historyMessages = this._deserializeHistoryChatMessages(
       this.historyMessagesString
     );
@@ -529,9 +532,6 @@ export class AIChatBlockPeekView extends LitElement {
   @property({ attribute: false })
   accessor host!: EditorHost;
 
-  @property({ attribute: false })
-  accessor previewSpecBuilder!: SpecBuilder;
-
   @property({ attribute: false })
   accessor networkSearchConfig!: AINetworkSearchConfig;
 
@@ -566,7 +566,6 @@ declare global {
 export const AIChatBlockPeekViewTemplate = (
   blockModel: AIChatBlockModel,
   host: EditorHost,
-  previewSpecBuilder: SpecBuilder,
   docDisplayConfig: DocDisplayConfig,
   searchMenuConfig: SearchMenuConfig,
   networkSearchConfig: AINetworkSearchConfig
@@ -574,7 +573,6 @@ export const AIChatBlockPeekViewTemplate = (
   return html`<ai-chat-block-peek-view
     .blockModel=${blockModel}
     .host=${host}
-    .previewSpecBuilder=${previewSpecBuilder}
     .networkSearchConfig=${networkSearchConfig}
     .docDisplayConfig=${docDisplayConfig}
     .searchMenuConfig=${searchMenuConfig}
diff --git a/packages/frontend/core/src/blocksuite/block-suite-editor/bi-directional-link-panel.tsx b/packages/frontend/core/src/blocksuite/block-suite-editor/bi-directional-link-panel.tsx
index e4ace9e2f1..54cf2ce36d 100644
--- a/packages/frontend/core/src/blocksuite/block-suite-editor/bi-directional-link-panel.tsx
+++ b/packages/frontend/core/src/blocksuite/block-suite-editor/bi-directional-link-panel.tsx
@@ -41,11 +41,11 @@ import {
   AffineSharedPageReference,
 } from '../../components/affine/reference-link';
 import { LitTextRenderer } from '../ai/components/text-renderer';
-import { enableEditorExtension } from '../extensions/entry/enable-editor';
 import {
   patchReferenceRenderer,
   type ReferenceReactRenderer,
 } from '../extensions/reference-renderer';
+import { getViewManager } from '../manager/migrating-view';
 import * as styles from './bi-directional-link-panel.css';
 
 const PREFIX = 'bi-directional-link-panel-collapse:';
@@ -163,9 +163,9 @@ const usePreviewExtensions = () => {
   const enableAI = useEnableAI();
 
   const extensions = useMemo(() => {
-    const specs = enableEditorExtension(framework, 'page', enableAI);
-    specs.extend([patchReferenceRenderer(reactToLit, referenceRenderer)]);
-    return specs.value;
+    const manager = getViewManager(framework, enableAI);
+    const specs = manager.get('preview-page');
+    return [...specs, patchReferenceRenderer(reactToLit, referenceRenderer)];
   }, [reactToLit, referenceRenderer, framework, enableAI]);
 
   return [extensions, portals] as const;
diff --git a/packages/frontend/core/src/blocksuite/block-suite-editor/index.ts b/packages/frontend/core/src/blocksuite/block-suite-editor/index.ts
index 2f7395b2f3..66a1f66253 100644
--- a/packages/frontend/core/src/blocksuite/block-suite-editor/index.ts
+++ b/packages/frontend/core/src/blocksuite/block-suite-editor/index.ts
@@ -1,10 +1,11 @@
 import { registerAIEffects } from '@affine/core/blocksuite/ai/effects';
 import { editorEffects } from '@affine/core/blocksuite/editors';
-import { effects as bsEffects } from '@blocksuite/affine/effects';
+import type * as EffectType from '@blocksuite/affine/effects';
+
+declare type _GLOBAL_ = typeof EffectType;
 
 import { registerTemplates } from './register-templates';
 
-bsEffects();
 editorEffects();
 registerAIEffects();
 registerTemplates();
diff --git a/packages/frontend/core/src/blocksuite/block-suite-editor/lit-adaper.tsx b/packages/frontend/core/src/blocksuite/block-suite-editor/lit-adaper.tsx
index 7a89997a6c..dd492ab687 100644
--- a/packages/frontend/core/src/blocksuite/block-suite-editor/lit-adaper.tsx
+++ b/packages/frontend/core/src/blocksuite/block-suite-editor/lit-adaper.tsx
@@ -62,7 +62,6 @@ import { EdgelessClipboardAIChatConfig } from '../extensions/edgeless-clipboard'
 import { patchForClipboardInElectron } from '../extensions/electron-clipboard';
 import { enableEditorExtension } from '../extensions/entry/enable-editor';
 import { enableMobileExtension } from '../extensions/entry/enable-mobile';
-import { enablePreviewExtension } from '../extensions/entry/enable-preview';
 import { patchForEdgelessNoteConfig } from '../extensions/note-config';
 import { patchNotificationService } from '../extensions/notification-service';
 import { patchOpenDocExtension } from '../extensions/open-doc';
@@ -140,10 +139,6 @@ const usePatchSpecs = (mode: DocMode) => {
     };
   }, [workspaceService]);
 
-  useMemo(() => {
-    enablePreviewExtension(framework);
-  }, [framework]);
-
   const confirmModal = useConfirmModal();
 
   const enableAI = useEnableAI();
@@ -161,9 +156,9 @@ const usePatchSpecs = (mode: DocMode) => {
   );
 
   const patchedSpecs = useMemo(() => {
-    const builder = enableEditorExtension(framework, mode, enableAI);
+    let extensions = enableEditorExtension(framework, mode, enableAI);
 
-    builder.extend(
+    extensions = extensions.concat(
       [
         patchReferenceRenderer(reactToLit, referenceRenderer),
         patchForEdgelessNoteConfig(framework, reactToLit, insidePeekView),
@@ -190,17 +185,20 @@ const usePatchSpecs = (mode: DocMode) => {
     );
 
     if (enablePDFEmbedPreview) {
-      builder.extend([patchForPDFEmbedView(reactToLit)]);
+      extensions = extensions.concat([patchForPDFEmbedView(reactToLit)]);
     }
 
     if (BUILD_CONFIG.isMobileEdition) {
-      enableMobileExtension(builder, framework);
-    }
-    if (BUILD_CONFIG.isElectron) {
-      builder.extend([patchForClipboardInElectron(framework)].flat());
+      extensions = enableMobileExtension(extensions, framework);
     }
 
-    return builder.value;
+    if (BUILD_CONFIG.isElectron) {
+      extensions = extensions.concat(
+        [patchForClipboardInElectron(framework)].flat()
+      );
+    }
+
+    return extensions;
   }, [
     framework,
     mode,
diff --git a/packages/frontend/core/src/blocksuite/extensions/entry/enable-editor.ts b/packages/frontend/core/src/blocksuite/extensions/entry/enable-editor.ts
index 5d53fdfa19..ae92876687 100644
--- a/packages/frontend/core/src/blocksuite/extensions/entry/enable-editor.ts
+++ b/packages/frontend/core/src/blocksuite/extensions/entry/enable-editor.ts
@@ -1,19 +1,13 @@
-import { enableAIExtension } from '@affine/core/blocksuite/ai';
-import { enableAffineExtension } from '@affine/core/blocksuite/extensions';
-import {
-  type SpecBuilder,
-  SpecProvider,
-} from '@blocksuite/affine/shared/utils';
+import type { ExtensionType } from '@blocksuite/affine/store';
 import { type FrameworkProvider } from '@toeverything/infra';
 
+import { getViewManager } from '../../manager/migrating-view';
+
 export function enableEditorExtension(
   framework: FrameworkProvider,
   mode: 'edgeless' | 'page',
   enableAI: boolean
-): SpecBuilder {
-  const spec = SpecProvider._.getSpec(mode);
-  enableAffineExtension(spec, framework);
-  enableAIExtension(spec, framework, enableAI);
-
-  return spec;
+): ExtensionType[] {
+  const manager = getViewManager(framework, enableAI);
+  return manager.get(mode);
 }
diff --git a/packages/frontend/core/src/blocksuite/extensions/entry/enable-mobile.ts b/packages/frontend/core/src/blocksuite/extensions/entry/enable-mobile.ts
index bb095b0986..9f739d9dc0 100644
--- a/packages/frontend/core/src/blocksuite/extensions/entry/enable-mobile.ts
+++ b/packages/frontend/core/src/blocksuite/extensions/entry/enable-mobile.ts
@@ -11,7 +11,6 @@ import {
   VirtualKeyboardProvider as BSVirtualKeyboardProvider,
   type VirtualKeyboardProviderWithAction,
 } from '@blocksuite/affine/shared/services';
-import type { SpecBuilder } from '@blocksuite/affine/shared/utils';
 import { type BlockStdScope, LifeCycleWatcher } from '@blocksuite/affine/std';
 import type { ExtensionType } from '@blocksuite/affine/store';
 import { SlashMenuExtension } from '@blocksuite/affine/widgets/slash-menu';
@@ -112,16 +111,26 @@ function KeyboardToolbarExtension(framework: FrameworkProvider): ExtensionType {
 }
 
 export function enableMobileExtension(
-  specBuilder: SpecBuilder,
+  extensions: ExtensionType[],
   framework: FrameworkProvider
-): void {
-  specBuilder.omit(codeToolbarWidget);
-  specBuilder.omit(toolbarWidget);
-  specBuilder.omit(SlashMenuExtension);
-  specBuilder.extend([
+): ExtensionType[] {
+  const next = extensions.filter(extension => {
+    if (extension === codeToolbarWidget) {
+      return false;
+    }
+    if (extension === toolbarWidget) {
+      return false;
+    }
+    if (extension === SlashMenuExtension) {
+      return false;
+    }
+    return true;
+  });
+  next.push(
     MobileSpecsPatches,
     KeyboardToolbarExtension(framework),
     mobileParagraphConfig,
-    mobileCodeConfig,
-  ]);
+    mobileCodeConfig
+  );
+  return next;
 }
diff --git a/packages/frontend/core/src/blocksuite/extensions/entry/enable-preview.ts b/packages/frontend/core/src/blocksuite/extensions/entry/enable-preview.ts
index cdefad5ec4..8e6c26158f 100644
--- a/packages/frontend/core/src/blocksuite/extensions/entry/enable-preview.ts
+++ b/packages/frontend/core/src/blocksuite/extensions/entry/enable-preview.ts
@@ -27,7 +27,7 @@ import { getFontConfigExtension } from '../font-config';
 import { patchPeekViewService } from '../peek-view-service';
 import { getThemeExtension } from '../theme';
 
-function getPagePreviewThemeExtension(framework: FrameworkProvider) {
+export function getPagePreviewThemeExtension(framework: FrameworkProvider) {
   class AffinePagePreviewThemeExtension
     extends LifeCycleWatcher
     implements ThemeExtension
diff --git a/packages/frontend/core/src/blocksuite/manager/migrating-store.ts b/packages/frontend/core/src/blocksuite/manager/migrating-store.ts
new file mode 100644
index 0000000000..16b2d55c32
--- /dev/null
+++ b/packages/frontend/core/src/blocksuite/manager/migrating-store.ts
@@ -0,0 +1,26 @@
+import {
+  type StoreExtensionContext,
+  StoreExtensionManager,
+  StoreExtensionProvider,
+} from '@blocksuite/affine/ext-loader';
+import { MigratingStoreExtension } from '@blocksuite/affine/extensions/store';
+
+import { AIChatBlockSchemaExtension } from '../ai/blocks/ai-chat-block/model';
+
+class MigratingAffineStoreExtension extends StoreExtensionProvider {
+  override name = 'affine-store-extensions';
+
+  override setup(context: StoreExtensionContext) {
+    super.setup(context);
+    context.register(AIChatBlockSchemaExtension);
+  }
+}
+
+const manager = new StoreExtensionManager([
+  MigratingAffineStoreExtension,
+  MigratingStoreExtension,
+]);
+
+export function getStoreManager() {
+  return manager;
+}
diff --git a/packages/frontend/core/src/blocksuite/manager/migrating-view.ts b/packages/frontend/core/src/blocksuite/manager/migrating-view.ts
new file mode 100644
index 0000000000..01a38800af
--- /dev/null
+++ b/packages/frontend/core/src/blocksuite/manager/migrating-view.ts
@@ -0,0 +1,144 @@
+import { PeekViewService } from '@affine/core/modules/peek-view';
+import { ParagraphBlockConfigExtension } from '@blocksuite/affine/blocks/paragraph';
+import {
+  type ViewExtensionContext,
+  ViewExtensionManager,
+  ViewExtensionProvider,
+} from '@blocksuite/affine/ext-loader';
+import { MigratingViewExtension } from '@blocksuite/affine/extensions/view';
+import { ToolbarModuleExtension } from '@blocksuite/affine/shared/services';
+import { BlockFlavourIdentifier } from '@blocksuite/affine/std';
+import { FrameworkProvider } from '@toeverything/infra';
+import { z } from 'zod';
+
+import { toolbarAIEntryConfig } from '../ai';
+import { AIChatBlockSpec } from '../ai/blocks';
+import { AITranscriptionBlockSpec } from '../ai/blocks/ai-chat-block/ai-transcription-block';
+import { edgelessToolbarAIEntryConfig } from '../ai/entries/edgeless';
+import { imageToolbarAIEntryConfig } from '../ai/entries/image-toolbar/setup-image-toolbar';
+import { AICodeBlockWatcher } from '../ai/extensions/ai-code';
+import { getAIEdgelessRootWatcher } from '../ai/extensions/ai-edgeless-root';
+import { getAIPageRootWatcher } from '../ai/extensions/ai-page-root';
+import { AiSlashMenuConfigExtension } from '../ai/extensions/ai-slash-menu';
+import { CopilotTool } from '../ai/tool/copilot-tool';
+import { aiPanelWidget } from '../ai/widgets/ai-panel/ai-panel';
+import { edgelessCopilotWidget } from '../ai/widgets/edgeless-copilot';
+import { buildDocDisplayMetaExtension } from '../extensions/display-meta';
+import { getEditorConfigExtension } from '../extensions/editor-config';
+import { getPagePreviewThemeExtension } from '../extensions/entry/enable-preview';
+import { getFontConfigExtension } from '../extensions/font-config';
+import { patchPeekViewService } from '../extensions/peek-view-service';
+import { getTelemetryExtension } from '../extensions/telemetry';
+import { getThemeExtension } from '../extensions/theme';
+
+const optionsSchema = z.object({
+  enableAI: z.boolean().optional(),
+  framework: z.instanceof(FrameworkProvider),
+});
+
+class MigratingAffineViewExtension extends ViewExtensionProvider<
+  z.infer<typeof optionsSchema>
+> {
+  override name = 'affine-view-extensions';
+
+  override schema = optionsSchema;
+
+  override setup(
+    context: ViewExtensionContext,
+    options?: z.infer<typeof optionsSchema>
+  ) {
+    super.setup(context);
+    const { framework, enableAI } = options || {};
+    if (framework) {
+      context.register([
+        getThemeExtension(framework),
+        getFontConfigExtension(),
+        buildDocDisplayMetaExtension(framework),
+      ]);
+      if (context.scope === 'page' || context.scope === 'edgeless') {
+        context.register(getTelemetryExtension());
+        context.register(getEditorConfigExtension(framework));
+      }
+      if (
+        context.scope === 'preview-page' ||
+        context.scope === 'preview-edgeless'
+      ) {
+        context.register(getPagePreviewThemeExtension(framework));
+        context.register(patchPeekViewService(framework.get(PeekViewService)));
+      }
+      if (enableAI) {
+        context.register(AIChatBlockSpec);
+        context.register(AITranscriptionBlockSpec);
+        context.register(
+          [
+            AICodeBlockWatcher,
+            ToolbarModuleExtension({
+              id: BlockFlavourIdentifier('custom:affine:image'),
+              config: imageToolbarAIEntryConfig(),
+            }),
+            ParagraphBlockConfigExtension({
+              getPlaceholder: model => {
+                const placeholders = {
+                  text: "Type '/' for commands, 'space' for AI",
+                  h1: 'Heading 1',
+                  h2: 'Heading 2',
+                  h3: 'Heading 3',
+                  h4: 'Heading 4',
+                  h5: 'Heading 5',
+                  h6: 'Heading 6',
+                  quote: '',
+                };
+                return placeholders[model.props.type];
+              },
+            }),
+          ].flat()
+        );
+        if (context.scope === 'edgeless') {
+          context.register([
+            CopilotTool,
+            aiPanelWidget,
+            edgelessCopilotWidget,
+            getAIEdgelessRootWatcher(framework),
+            // In note
+            ToolbarModuleExtension({
+              id: BlockFlavourIdentifier('custom:affine:note'),
+              config: toolbarAIEntryConfig(),
+            }),
+            ToolbarModuleExtension({
+              id: BlockFlavourIdentifier('custom:affine:surface:*'),
+              config: edgelessToolbarAIEntryConfig(),
+            }),
+            AiSlashMenuConfigExtension(),
+          ]);
+        }
+        if (context.scope === 'page') {
+          context.register([
+            aiPanelWidget,
+            getAIPageRootWatcher(framework),
+            ToolbarModuleExtension({
+              id: BlockFlavourIdentifier('custom:affine:note'),
+              config: toolbarAIEntryConfig(),
+            }),
+            AiSlashMenuConfigExtension(),
+          ]);
+        }
+      }
+    }
+  }
+}
+
+const manager = new ViewExtensionManager([
+  MigratingViewExtension,
+  MigratingAffineViewExtension,
+]);
+
+export function getViewManager(
+  framework: FrameworkProvider,
+  enableAI: boolean
+) {
+  manager.configure(MigratingAffineViewExtension, {
+    framework,
+    enableAI,
+  });
+  return manager;
+}
diff --git a/packages/frontend/core/src/desktop/dialogs/setting/general-setting/editor/edgeless/snapshot.tsx b/packages/frontend/core/src/desktop/dialogs/setting/general-setting/editor/edgeless/snapshot.tsx
index cb98c170c5..ff41948577 100644
--- a/packages/frontend/core/src/desktop/dialogs/setting/general-setting/editor/edgeless/snapshot.tsx
+++ b/packages/frontend/core/src/desktop/dialogs/setting/general-setting/editor/edgeless/snapshot.tsx
@@ -1,10 +1,10 @@
 import { Skeleton } from '@affine/component';
+import { getViewManager } from '@affine/core/blocksuite/manager/migrating-view';
 import type { EditorSettingSchema } from '@affine/core/modules/editor-setting';
 import { EditorSettingService } from '@affine/core/modules/editor-setting';
 import { EdgelessCRUDIdentifier } from '@blocksuite/affine/blocks/surface';
 import { Bound } from '@blocksuite/affine/global/gfx';
 import { ViewportElementExtension } from '@blocksuite/affine/shared/services';
-import { SpecProvider } from '@blocksuite/affine/shared/utils';
 import type { EditorHost } from '@blocksuite/affine/std';
 import { BlockStdScope } from '@blocksuite/affine/std';
 import {
@@ -14,7 +14,7 @@ import {
 import type { Block, Store } from '@blocksuite/affine/store';
 import { useFramework } from '@toeverything/infra';
 import { isEqual } from 'lodash-es';
-import { useCallback, useEffect, useRef } from 'react';
+import { useCallback, useEffect, useMemo, useRef } from 'react';
 import { map, pairwise } from 'rxjs';
 
 import {
@@ -55,6 +55,13 @@ export const EdgelessSnapshot = (props: Props) => {
   const framework = useFramework();
   const { editorSetting } = framework.get(EditorSettingService);
 
+  const extensions = useMemo(() => {
+    const manager = getViewManager(framework, false);
+    return manager
+      .get('preview-edgeless')
+      .concat([ViewportElementExtension('.ref-viewport')]);
+  }, [framework]);
+
   const updateElements = useCallback(() => {
     const editorHost = editorHostRef.current;
     const doc = docRef.current;
@@ -76,9 +83,7 @@ export const EdgelessSnapshot = (props: Props) => {
 
     const editorHost = new BlockStdScope({
       store: doc,
-      extensions: SpecProvider._.getSpec('preview:edgeless').extend([
-        ViewportElementExtension('.ref-viewport'),
-      ]).value,
+      extensions,
     }).render();
     docRef.current = doc;
     editorHostRef.current?.remove();
@@ -115,7 +120,7 @@ export const EdgelessSnapshot = (props: Props) => {
 
     // append to dom node
     wrapperRef.current.append(editorHost);
-  }, [docName, firstUpdate, updateElements]);
+  }, [docName, extensions, firstUpdate, updateElements]);
 
   useEffect(() => {
     // eslint-disable-next-line @typescript-eslint/no-floating-promises
diff --git a/packages/frontend/core/src/desktop/pages/workspace/detail-page/tabs/chat.tsx b/packages/frontend/core/src/desktop/pages/workspace/detail-page/tabs/chat.tsx
index 77e1127aa5..b3bcacabdb 100644
--- a/packages/frontend/core/src/desktop/pages/workspace/detail-page/tabs/chat.tsx
+++ b/packages/frontend/core/src/desktop/pages/workspace/detail-page/tabs/chat.tsx
@@ -2,12 +2,10 @@ import { ChatPanel } from '@affine/core/blocksuite/ai';
 import type { AffineEditorContainer } from '@affine/core/blocksuite/block-suite-editor';
 import { useAIChatConfig } from '@affine/core/components/hooks/affine/use-ai-chat-config';
 import { WorkbenchService } from '@affine/core/modules/workbench';
+import { ViewExtensionManagerIdentifier } from '@blocksuite/affine/ext-loader';
 import { RefNodeSlotsProvider } from '@blocksuite/affine/inlines/reference';
 import { DocModeProvider } from '@blocksuite/affine/shared/services';
-import {
-  createSignalFromObservable,
-  SpecProvider,
-} from '@blocksuite/affine/shared/utils';
+import { createSignalFromObservable } from '@blocksuite/affine/shared/utils';
 import { useFramework } from '@toeverything/infra';
 import { forwardRef, useEffect, useRef } from 'react';
 
@@ -69,8 +67,9 @@ export const EditorChatPanel = forwardRef(function EditorChatPanel(
       chatPanelRef.current.docDisplayConfig = docDisplayConfig;
       chatPanelRef.current.searchMenuConfig = searchMenuConfig;
       chatPanelRef.current.networkSearchConfig = networkSearchConfig;
-      chatPanelRef.current.previewSpecBuilder =
-        SpecProvider._.getSpec('preview:page');
+      chatPanelRef.current.extensions = editor.host.std
+        .get(ViewExtensionManagerIdentifier)
+        .get('preview-page');
 
       containerRef.current?.append(chatPanelRef.current);
     } else {
diff --git a/packages/frontend/core/src/modules/peek-view/view/ai-chat-block-peek-view/index.tsx b/packages/frontend/core/src/modules/peek-view/view/ai-chat-block-peek-view/index.tsx
index 77e6e9de1e..6c917a6537 100644
--- a/packages/frontend/core/src/modules/peek-view/view/ai-chat-block-peek-view/index.tsx
+++ b/packages/frontend/core/src/modules/peek-view/view/ai-chat-block-peek-view/index.tsx
@@ -2,7 +2,6 @@ import { toReactNode } from '@affine/component';
 import { AIChatBlockPeekViewTemplate } from '@affine/core/blocksuite/ai';
 import type { AIChatBlockModel } from '@affine/core/blocksuite/ai/blocks/ai-chat-block/model/ai-chat-model';
 import { useAIChatConfig } from '@affine/core/components/hooks/affine/use-ai-chat-config';
-import { SpecProvider } from '@blocksuite/affine/shared/utils';
 import type { EditorHost } from '@blocksuite/affine/std';
 import { useMemo } from 'react';
 
@@ -18,11 +17,9 @@ export const AIChatBlockPeekView = ({
   const { docDisplayConfig, searchMenuConfig, networkSearchConfig } =
     useAIChatConfig();
   return useMemo(() => {
-    const previewSpecBuilder = SpecProvider._.getSpec('preview:page');
     const template = AIChatBlockPeekViewTemplate(
       model,
       host,
-      previewSpecBuilder,
       docDisplayConfig,
       searchMenuConfig,
       networkSearchConfig
diff --git a/packages/frontend/core/src/modules/workspace/impls/doc.ts b/packages/frontend/core/src/modules/workspace/impls/doc.ts
index 9cc5f060eb..f36ae4e3f6 100644
--- a/packages/frontend/core/src/modules/workspace/impls/doc.ts
+++ b/packages/frontend/core/src/modules/workspace/impls/doc.ts
@@ -1,4 +1,4 @@
-import { SpecProvider } from '@blocksuite/affine/shared/utils';
+import { getStoreManager } from '@affine/core/blocksuite/manager/migrating-store';
 import {
   AwarenessStore,
   type Doc,
@@ -294,11 +294,9 @@ export class DocImpl implements Doc {
       return this._storeMap.get(key) as Store;
     }
 
-    const storeExtensions = SpecProvider._.getSpec('store');
+    const storeExtensions = getStoreManager().get('store');
     const extensionSet = new Set(
-      storeExtensions.value
-        .concat(extensions ?? [])
-        .concat(this.storeExtensions)
+      storeExtensions.concat(extensions ?? []).concat(this.storeExtensions)
     );
 
     const doc = new Store({
diff --git a/tools/utils/src/workspace.gen.ts b/tools/utils/src/workspace.gen.ts
index f41e026c2d..3bda07b306 100644
--- a/tools/utils/src/workspace.gen.ts
+++ b/tools/utils/src/workspace.gen.ts
@@ -388,6 +388,7 @@ export const PackageList = [
       'blocksuite/affine/blocks/frame',
       'blocksuite/affine/blocks/surface',
       'blocksuite/affine/components',
+      'blocksuite/affine/ext-loader',
       'blocksuite/affine/inlines/reference',
       'blocksuite/affine/model',
       'blocksuite/affine/shared',
@@ -465,6 +466,7 @@ export const PackageList = [
       'blocksuite/affine/blocks/frame',
       'blocksuite/affine/blocks/surface',
       'blocksuite/affine/components',
+      'blocksuite/affine/ext-loader',
       'blocksuite/affine/model',
       'blocksuite/affine/rich-text',
       'blocksuite/affine/shared',
@@ -754,6 +756,7 @@ export const PackageList = [
       'blocksuite/affine/blocks/paragraph',
       'blocksuite/affine/blocks/surface',
       'blocksuite/affine/components',
+      'blocksuite/affine/ext-loader',
       'blocksuite/affine/model',
       'blocksuite/affine/shared',
       'blocksuite/framework/global',
diff --git a/yarn.lock b/yarn.lock
index 40899ebcf9..525a638a6d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2875,6 +2875,7 @@ __metadata:
     "@blocksuite/affine-block-frame": "workspace:*"
     "@blocksuite/affine-block-surface": "workspace:*"
     "@blocksuite/affine-components": "workspace:*"
+    "@blocksuite/affine-ext-loader": "workspace:*"
     "@blocksuite/affine-inline-reference": "workspace:*"
     "@blocksuite/affine-model": "workspace:*"
     "@blocksuite/affine-shared": "workspace:*"
@@ -3027,6 +3028,7 @@ __metadata:
     "@blocksuite/affine-block-frame": "workspace:*"
     "@blocksuite/affine-block-surface": "workspace:*"
     "@blocksuite/affine-components": "workspace:*"
+    "@blocksuite/affine-ext-loader": "workspace:*"
     "@blocksuite/affine-model": "workspace:*"
     "@blocksuite/affine-rich-text": "workspace:*"
     "@blocksuite/affine-shared": "workspace:*"
@@ -3598,6 +3600,7 @@ __metadata:
     "@blocksuite/affine-block-paragraph": "workspace:*"
     "@blocksuite/affine-block-surface": "workspace:*"
     "@blocksuite/affine-components": "workspace:*"
+    "@blocksuite/affine-ext-loader": "workspace:*"
     "@blocksuite/affine-model": "workspace:*"
     "@blocksuite/affine-shared": "workspace:*"
     "@blocksuite/global": "workspace:*"