diff --git a/packages/frontend/core/src/pages/workspace/detail-page/detail-page-header.css.ts b/packages/frontend/core/src/pages/workspace/detail-page/detail-page-header.css.ts
index 25ef393357..075bc15e5c 100644
--- a/packages/frontend/core/src/pages/workspace/detail-page/detail-page-header.css.ts
+++ b/packages/frontend/core/src/pages/workspace/detail-page/detail-page-header.css.ts
@@ -35,7 +35,7 @@ export const mainHeader = style([
 export const sidebarHeader = style([
   header,
   {
-    padding: '0 14px',
+    padding: '0 16px',
     gap: '12px',
   },
 ]);
diff --git a/packages/frontend/core/src/pages/workspace/detail-page/detail-page-header.tsx b/packages/frontend/core/src/pages/workspace/detail-page/detail-page-header.tsx
index 517ded84c8..e2e432e538 100644
--- a/packages/frontend/core/src/pages/workspace/detail-page/detail-page-header.tsx
+++ b/packages/frontend/core/src/pages/workspace/detail-page/detail-page-header.tsx
@@ -11,6 +11,7 @@ import { JournalTodayButton } from '@affine/core/components/blocksuite/block-sui
 import { PageHeaderMenuButton } from '@affine/core/components/blocksuite/block-suite-header/menu';
 import { EditorModeSwitch } from '@affine/core/components/blocksuite/block-suite-mode-switch';
 import { useJournalInfoHelper } from '@affine/core/hooks/use-journal';
+import type { BlockSuiteWorkspace } from '@affine/core/shared';
 import type { Workspace } from '@affine/workspace';
 import { RightSidebarIcon } from '@blocksuite/icons';
 import type { Page } from '@blocksuite/store';
@@ -187,7 +188,11 @@ export function DetailPageHeader(props: PageHeaderProps) {
   );
 }
 
-function WindowsSidebarHeader() {
+interface SidebarHeaderProps {
+  workspace: BlockSuiteWorkspace;
+  page: Page;
+}
+function WindowsSidebarHeader(props: SidebarHeaderProps) {
   return (
     <>
       <Header className={styles.sidebarHeader} style={{ paddingRight: 0 }}>
@@ -196,26 +201,22 @@ function WindowsSidebarHeader() {
         <WindowsAppControls />
       </Header>
       <div className={styles.standaloneExtensionSwitcherWrapper}>
-        <ExtensionTabs />
+        <ExtensionTabs {...props} />
       </div>
     </>
   );
 }
 
-function NonWindowsSidebarHeader() {
+function NonWindowsSidebarHeader(props: SidebarHeaderProps) {
   return (
     <Header className={styles.sidebarHeader}>
-      <ExtensionTabs />
+      <ExtensionTabs {...props} />
       <div className={styles.spacer} />
       <ToggleSidebarButton />
     </Header>
   );
 }
 
-export function RightSidebarHeader() {
-  return isWindowsDesktop ? (
-    <WindowsSidebarHeader />
-  ) : (
-    <NonWindowsSidebarHeader />
-  );
-}
+export const RightSidebarHeader = isWindowsDesktop
+  ? WindowsSidebarHeader
+  : NonWindowsSidebarHeader;
diff --git a/packages/frontend/core/src/pages/workspace/detail-page/detail-page.tsx b/packages/frontend/core/src/pages/workspace/detail-page/detail-page.tsx
index cf305f9d76..1c49ef9df6 100644
--- a/packages/frontend/core/src/pages/workspace/detail-page/detail-page.tsx
+++ b/packages/frontend/core/src/pages/workspace/detail-page/detail-page.tsx
@@ -193,7 +193,7 @@ const DetailPageImpl = memo(function DetailPageImpl({ page }: { page: Page }) {
         sidebar={
           !isInTrash ? (
             <div className={styles.sidebarContainerInner}>
-              <RightSidebarHeader />
+              <RightSidebarHeader workspace={blockSuiteWorkspace} page={page} />
               <EditorSidebar />
             </div>
           ) : null
diff --git a/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/atoms.ts b/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/atoms.ts
index fb179f6e4a..56c0031dc9 100644
--- a/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/atoms.ts
+++ b/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/atoms.ts
@@ -1,16 +1,18 @@
 // main editor sidebar states
-import { assertExists } from '@blocksuite/global/utils';
+import { assertExists, isEqual } from '@blocksuite/global/utils';
 import { atom } from 'jotai';
 import { selectAtom } from 'jotai/utils';
 
 import { copilotExtension } from './extensions/copilot';
 import { framePanelExtension } from './extensions/frame';
+import { journalExtension } from './extensions/journal';
 import { outlineExtension } from './extensions/outline';
 import type { EditorExtension, EditorExtensionName } from './types';
 
 // the list of all possible extensions in affine.
 // order matters (determines the order of the tabs)
 export const extensions: EditorExtension[] = [
+  journalExtension,
   outlineExtension,
   framePanelExtension,
   copilotExtension,
@@ -42,7 +44,8 @@ const widthAtom = selectAtom(baseStateAtom, state => state.width);
 
 export const editorExtensionsAtom = selectAtom(
   baseStateAtom,
-  state => state.extensions
+  state => state.extensions,
+  isEqual
 );
 
 // get/set sidebar open state
diff --git a/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/extensions/extensions.tsx b/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/extensions/extensions.tsx
index 1c6ec27857..4803c34ddb 100644
--- a/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/extensions/extensions.tsx
+++ b/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/extensions/extensions.tsx
@@ -1,6 +1,9 @@
 import { IconButton } from '@affine/component';
+import { useJournalInfoHelper } from '@affine/core/hooks/use-journal';
 import { useWorkspaceEnabledFeatures } from '@affine/core/hooks/use-workspace-features';
+import type { BlockSuiteWorkspace } from '@affine/core/shared';
 import { FeatureType } from '@affine/graphql';
+import type { Page } from '@blocksuite/store';
 import { assignInlineVars } from '@vanilla-extract/dynamic';
 import { useAtom, useAtomValue } from 'jotai';
 import { useEffect } from 'react';
@@ -11,18 +14,32 @@ import {
 } from '../atoms';
 import * as styles from './extensions.css';
 
+export interface ExtensionTabsProps {
+  workspace: BlockSuiteWorkspace;
+  page: Page;
+}
+
 // provide a switcher for active extensions
 // will be used in global top header (MacOS) or sidebar (Windows)
-export const ExtensionTabs = () => {
+export const ExtensionTabs = ({ page }: ExtensionTabsProps) => {
   // todo: filter in editorExtensionsAtom instead?
   const copilotEnabled = useWorkspaceEnabledFeatures().includes(
     FeatureType.Copilot
   );
+
+  const { isJournal } = useJournalInfoHelper(page.meta);
+
   const exts = useAtomValue(editorExtensionsAtom).filter(ext => {
     if (ext.name === 'copilot' && !copilotEnabled) return false;
     return true;
   });
   const [selected, setSelected] = useAtom(editorSidebarActiveExtensionAtom);
+
+  // if journal is active, set selected to journal
+  useEffect(() => {
+    isJournal && setSelected('journal');
+  }, [isJournal, setSelected]);
+
   const vars = assignInlineVars({
     [styles.activeIdx]: String(
       exts.findIndex(ext => ext.name === selected?.name) ?? 0
diff --git a/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/extensions/journal.tsx b/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/extensions/journal.tsx
new file mode 100644
index 0000000000..97741ca0d7
--- /dev/null
+++ b/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/extensions/journal.tsx
@@ -0,0 +1,13 @@
+import { TodayIcon } from '@blocksuite/icons';
+
+import type { EditorExtension } from '..';
+
+const EditorJournalPanel = () => {
+  return <div>journal extension</div>;
+};
+
+export const journalExtension: EditorExtension = {
+  name: 'journal',
+  icon: <TodayIcon />,
+  Component: EditorJournalPanel,
+};
diff --git a/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/types.ts b/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/types.ts
index b992ec9f9f..d153ca834e 100644
--- a/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/types.ts
+++ b/packages/frontend/core/src/pages/workspace/detail-page/editor-sidebar/types.ts
@@ -1,4 +1,4 @@
-export type EditorExtensionName = 'outline' | 'frame' | 'copilot';
+export type EditorExtensionName = 'outline' | 'frame' | 'copilot' | 'journal';
 
 export interface EditorExtension {
   name: EditorExtensionName;