diff --git a/blocksuite/affine/blocks/paragraph/src/paragraph-block.ts b/blocksuite/affine/blocks/paragraph/src/paragraph-block.ts
index 4f8edd2a01..4fe9c98a4b 100644
--- a/blocksuite/affine/blocks/paragraph/src/paragraph-block.ts
+++ b/blocksuite/affine/blocks/paragraph/src/paragraph-block.ts
@@ -28,6 +28,7 @@ import { query, state } from 'lit/decorators.js';
 import { classMap } from 'lit/directives/class-map.js';
 import { styleMap } from 'lit/directives/style-map.js';
 import { unsafeHTML } from 'lit/directives/unsafe-html.js';
+import { repeat } from 'lit/directives/repeat.js';
 
 import { ParagraphBlockConfigExtension } from './paragraph-block-config.js';
 import { paragraphBlockStyles } from './styles.js';
@@ -227,6 +228,12 @@ export class ParagraphBlockComponent extends CaptionedBlockComponent<ParagraphBl
   }
 
   override renderBlock(): TemplateResult<1> {
+    const widgets = html`${repeat(
+      Object.entries(this.widgets),
+      ([id]) => id,
+      ([_, widget]) => widget
+    )}`;
+
     const { type$ } = this.model.props;
     const collapsed = this.store.readonly
       ? this._readonlyCollapsed
@@ -341,6 +348,7 @@ export class ParagraphBlockComponent extends CaptionedBlockComponent<ParagraphBl
         </div>
 
         ${children}
+        ${widgets}
       </div>
     `;
   }
diff --git a/packages/frontend/core/src/blocksuite/ai/effects.ts b/packages/frontend/core/src/blocksuite/ai/effects.ts
index 8832858c25..bb2e569c46 100644
--- a/packages/frontend/core/src/blocksuite/ai/effects.ts
+++ b/packages/frontend/core/src/blocksuite/ai/effects.ts
@@ -71,6 +71,7 @@ import {
 } from './widgets/ai-panel/components';
 import { AIFinishTip } from './widgets/ai-panel/components/finish-tip';
 import { GeneratingPlaceholder } from './widgets/ai-panel/components/generating-placeholder';
+import { AFFINE_BLOCK_DIFF_WIDGET, AffineBlockDiffWidget } from './widgets/block-diff/widget';
 import {
   AFFINE_EDGELESS_COPILOT_WIDGET,
   EdgelessCopilotWidget,
@@ -158,6 +159,7 @@ export function registerAIEffects() {
 
   customElements.define(AFFINE_AI_PANEL_WIDGET, AffineAIPanelWidget);
   customElements.define(AFFINE_EDGELESS_COPILOT_WIDGET, EdgelessCopilotWidget);
+  customElements.define(AFFINE_BLOCK_DIFF_WIDGET, AffineBlockDiffWidget);
 
   customElements.define('edgeless-copilot-panel', EdgelessCopilotPanel);
   customElements.define(
diff --git a/packages/frontend/core/src/blocksuite/ai/services/block-diff.ts b/packages/frontend/core/src/blocksuite/ai/services/block-diff.ts
new file mode 100644
index 0000000000..1d82291c52
--- /dev/null
+++ b/packages/frontend/core/src/blocksuite/ai/services/block-diff.ts
@@ -0,0 +1,52 @@
+import { createIdentifier } from '@blocksuite/global/di';
+import type { PatchOp } from '../utils/apply-model/markdown-diff';
+
+interface DiffMap {
+  // removed blocks
+  deletes: string[];
+  // inserted blocks
+  // key is the start block id, value is the blocks(markdowns) inserted
+  inserts: Record<string, string[]>;
+  // updated blocks
+  // key is the block id, value is the block(markdown)
+  updates: Record<string, string>;
+}
+
+export interface BlockDiffService {
+  /**
+   * Set the patches to the block diffs
+   * @param patches - The patches to set.
+   * @returns The diff map.
+   */
+  setPatches(patches: PatchOp[]): DiffMap;
+}
+
+export const BlockDiffService = createIdentifier<BlockDiffService>(
+  'AffineBlockDiffService'
+);
+
+export class BlockDiffServiceImpl implements BlockDiffService {
+  setPatches(patches: PatchOp[]): DiffMap {
+    const diffMap: DiffMap = {
+      deletes: [],
+      inserts: {},
+      updates: {},
+    };
+
+    for (const patch of patches) {
+      switch (patch.op) {
+        case 'delete':
+          diffMap.deletes.push(patch.block_id);
+          break;
+        case 'insert_at':
+          diffMap.inserts[patch.new_block.id] = [patch.new_block.content];
+          break;
+        case 'replace':
+          diffMap.updates[patch.block_id] = patch.new_content;
+          break;
+      }
+    }
+
+    return diffMap;
+  }
+}
diff --git a/packages/frontend/core/src/blocksuite/ai/widgets/ai-panel/ai-panel.ts b/packages/frontend/core/src/blocksuite/ai/widgets/ai-panel/ai-panel.ts
index 7555cdd84b..c9e59957df 100644
--- a/packages/frontend/core/src/blocksuite/ai/widgets/ai-panel/ai-panel.ts
+++ b/packages/frontend/core/src/blocksuite/ai/widgets/ai-panel/ai-panel.ts
@@ -505,6 +505,7 @@ export class AffineAIPanelWidget extends WidgetComponent {
   }
 
   override render() {
+    console.log
     if (this.state === 'hidden') {
       return nothing;
     }
diff --git a/packages/frontend/core/src/blocksuite/ai/widgets/block-diff/widget.ts b/packages/frontend/core/src/blocksuite/ai/widgets/block-diff/widget.ts
new file mode 100644
index 0000000000..16dfa7a8c9
--- /dev/null
+++ b/packages/frontend/core/src/blocksuite/ai/widgets/block-diff/widget.ts
@@ -0,0 +1,23 @@
+import { WidgetComponent, WidgetViewExtension } from '@blocksuite/affine/std';
+import { html } from 'lit';
+import { literal, unsafeStatic } from 'lit/static-html.js';
+
+export const AFFINE_BLOCK_DIFF_WIDGET = 'affine-block-diff-widget';
+
+export class AffineBlockDiffWidget extends WidgetComponent {
+  override render() {
+    const attached = this.block?.blockId;
+    return html`<div
+      class="ai-panel-container"
+      data-testid="ai-panel-container"
+    >
+        <h1>Block Diff</h1>
+    </div>`;
+  }
+}
+
+export const blockDiffWidget = WidgetViewExtension(
+  'affine:paragraph',
+  AFFINE_BLOCK_DIFF_WIDGET,
+  literal`${unsafeStatic(AFFINE_BLOCK_DIFF_WIDGET)}`
+);
diff --git a/packages/frontend/core/src/blocksuite/view-extensions/ai/index.ts b/packages/frontend/core/src/blocksuite/view-extensions/ai/index.ts
index 8f82676eed..4f5410206b 100644
--- a/packages/frontend/core/src/blocksuite/view-extensions/ai/index.ts
+++ b/packages/frontend/core/src/blocksuite/view-extensions/ai/index.ts
@@ -20,6 +20,7 @@ import { FrameworkProvider } from '@toeverything/infra';
 import { z } from 'zod';
 
 import { EdgelessClipboardAIChatConfig } from './edgeless-clipboard';
+import { blockDiffWidget } from '../../ai/widgets/block-diff/widget';
 
 const optionsSchema = z.object({
   enable: z.boolean().optional(),
@@ -50,6 +51,8 @@ export class AIViewExtension extends ViewExtensionProvider<AIViewOptions> {
           config: imageToolbarAIEntryConfig(),
         })
       );
+
+
     if (context.scope === 'edgeless' || context.scope === 'page') {
       context.register([
         aiPanelWidget,
@@ -73,6 +76,7 @@ export class AIViewExtension extends ViewExtensionProvider<AIViewOptions> {
       ]);
     }
     if (context.scope === 'page') {
+      context.register(blockDiffWidget);
       context.register(getAIPageRootWatcher(framework));
     }
   }