diff --git a/app/package.json b/app/package.json
index 46c7bd354f..e27b1a4f8a 100644
--- a/app/package.json
+++ b/app/package.json
@@ -19,6 +19,7 @@
     "@jupyter-notebook/help-extension": "~7.0.0-alpha.5",
     "@jupyter-notebook/notebook-extension": "~7.0.0-alpha.5",
     "@jupyter-notebook/terminal-extension": "~7.0.0-alpha.5",
+    "@jupyter-notebook/tree": "~7.0.0-alpha.5",
     "@jupyter-notebook/tree-extension": "~7.0.0-alpha.5",
     "@jupyter-notebook/ui-components": "~7.0.0-alpha.5",
     "@jupyterlab/application": "~4.0.0-alpha.10",
@@ -104,6 +105,7 @@
     "@jupyter-notebook/help-extension": "^7.0.0-alpha.5",
     "@jupyter-notebook/notebook-extension": "^7.0.0-alpha.5",
     "@jupyter-notebook/terminal-extension": "^7.0.0-alpha.5",
+    "@jupyter-notebook/tree": "^7.0.0-alpha.5",
     "@jupyter-notebook/tree-extension": "^7.0.0-alpha.5",
     "@jupyter-notebook/ui-components": "^7.0.0-alpha.5",
     "@jupyterlab/application-extension": "^4.0.0-alpha.10",
@@ -194,6 +196,7 @@
       "@jupyterlab/user-extension"
     ],
     "singletonPackages": [
+      "@jupyter-notebook/tree",
       "@jupyterlab/application",
       "@jupyterlab/apputils",
       "@jupyterlab/cell-toolbar",
diff --git a/packages/_metapackage/package.json b/packages/_metapackage/package.json
index 02693ac6f1..205c89adb2 100644
--- a/packages/_metapackage/package.json
+++ b/packages/_metapackage/package.json
@@ -29,6 +29,7 @@
     "@jupyter-notebook/lab-extension": "file:../lab-extension",
     "@jupyter-notebook/notebook-extension": "file:../notebook-extension",
     "@jupyter-notebook/terminal-extension": "file:../terminal-extension",
+    "@jupyter-notebook/tree": "file:../tree",
     "@jupyter-notebook/tree-extension": "file:../tree-extension",
     "@jupyter-notebook/ui-components": "file:../ui-components"
   },
diff --git a/packages/_metapackage/src/index.ts b/packages/_metapackage/src/index.ts
index e0ba7372bc..c41bc6c855 100644
--- a/packages/_metapackage/src/index.ts
+++ b/packages/_metapackage/src/index.ts
@@ -7,5 +7,6 @@ import '@jupyter-notebook/help-extension';
 import '@jupyter-notebook/lab-extension';
 import '@jupyter-notebook/notebook-extension';
 import '@jupyter-notebook/terminal-extension';
+import '@jupyter-notebook/tree';
 import '@jupyter-notebook/tree-extension';
 import '@jupyter-notebook/ui-components';
diff --git a/packages/tree-extension/package.json b/packages/tree-extension/package.json
index 2187b0e209..fec081e678 100644
--- a/packages/tree-extension/package.json
+++ b/packages/tree-extension/package.json
@@ -40,6 +40,7 @@
   },
   "dependencies": {
     "@jupyter-notebook/application": "^7.0.0-alpha.5",
+    "@jupyter-notebook/tree": "^7.0.0-alpha.5",
     "@jupyterlab/application": "^4.0.0-alpha.10",
     "@jupyterlab/apputils": "^4.0.0-alpha.10",
     "@jupyterlab/coreutils": "^6.0.0-alpha.10",
diff --git a/packages/tree-extension/src/index.ts b/packages/tree-extension/src/index.ts
index d9b842f7ac..3c3aafd5ff 100644
--- a/packages/tree-extension/src/index.ts
+++ b/packages/tree-extension/src/index.ts
@@ -27,11 +27,12 @@ import { ITranslator } from '@jupyterlab/translation';
 import {
   caretDownIcon,
   folderIcon,
-  runningIcon,
-  TabBarSvg
+  runningIcon
 } from '@jupyterlab/ui-components';
 
-import { Menu, MenuBar, TabPanel } from '@lumino/widgets';
+import { Menu, MenuBar } from '@lumino/widgets';
+
+import { NotebookTreeWidget, INotebookTree } from '@jupyter-notebook/tree';
 
 /**
  * The file browser factory.
@@ -94,9 +95,9 @@ const createNew: JupyterFrontEndPlugin<void> = {
 };
 
 /**
- * A plugin to add the file browser widget to an ILabShell
+ * A plugin to add the file browser widget to an INotebookShell
  */
-const browserWidget: JupyterFrontEndPlugin<void> = {
+const notebookTreeWidget: JupyterFrontEndPlugin<INotebookTree> = {
   id: '@jupyter-notebook/tree-extension:widget',
   requires: [
     IFileBrowserFactory,
@@ -106,6 +107,7 @@ const browserWidget: JupyterFrontEndPlugin<void> = {
   ],
   optional: [IRunningSessionManagers],
   autoStart: true,
+  provides: INotebookTree,
   activate: (
     app: JupyterFrontEnd,
     factory: IFileBrowserFactory,
@@ -113,13 +115,8 @@ const browserWidget: JupyterFrontEndPlugin<void> = {
     settingRegistry: ISettingRegistry,
     toolbarRegistry: IToolbarWidgetRegistry,
     manager: IRunningSessionManagers | null
-  ): void => {
-    const tabPanel = new TabPanel({
-      tabPlacement: 'top',
-      tabsMovable: true,
-      renderer: TabBarSvg.defaultRenderer
-    });
-    tabPanel.addClass('jp-TreePanel');
+  ): INotebookTree => {
+    const nbTreeWidget = new NotebookTreeWidget();
 
     const trans = translator.load('notebook');
 
@@ -129,8 +126,8 @@ const browserWidget: JupyterFrontEndPlugin<void> = {
     browser.node.setAttribute('aria-label', trans.__('File Browser Section'));
     browser.title.icon = folderIcon;
 
-    tabPanel.addWidget(browser);
-    tabPanel.tabBar.addTab(browser.title);
+    nbTreeWidget.addWidget(browser);
+    nbTreeWidget.tabBar.addTab(browser.title);
 
     // Toolbar
     toolbarRegistry.addFactory(
@@ -150,7 +147,7 @@ const browserWidget: JupyterFrontEndPlugin<void> = {
         toolbarRegistry,
         settingRegistry,
         FILE_BROWSER_FACTORY,
-        browserWidget.id,
+        notebookTreeWidget.id,
         translator
       )
     );
@@ -160,8 +157,8 @@ const browserWidget: JupyterFrontEndPlugin<void> = {
       running.id = 'jp-running-sessions';
       running.title.label = trans.__('Running');
       running.title.icon = runningIcon;
-      tabPanel.addWidget(running);
-      tabPanel.tabBar.addTab(running.title);
+      nbTreeWidget.addWidget(running);
+      nbTreeWidget.tabBar.addTab(running.title);
     }
 
     // show checkboxes by default if there is no user setting override
@@ -177,12 +174,14 @@ const browserWidget: JupyterFrontEndPlugin<void> = {
         console.error(reason.message);
       });
 
-    app.shell.add(tabPanel, 'main', { rank: 100 });
+    app.shell.add(nbTreeWidget, 'main', { rank: 100 });
+
+    return nbTreeWidget;
   }
 };
 
 /**
  * Export the plugins as default.
  */
-const plugins: JupyterFrontEndPlugin<any>[] = [createNew, browserWidget];
+const plugins: JupyterFrontEndPlugin<any>[] = [createNew, notebookTreeWidget];
 export default plugins;
diff --git a/packages/tree-extension/style/index.css b/packages/tree-extension/style/index.css
index c6a335ca57..078667ad6e 100644
--- a/packages/tree-extension/style/index.css
+++ b/packages/tree-extension/style/index.css
@@ -1,3 +1,3 @@
 @import url('~@jupyterlab/filebrowser/style/index.css');
 
-@import url('./base.css');
+@import url('~@jupyter-notebook/tree/style/index.css');
diff --git a/packages/tree-extension/style/index.js b/packages/tree-extension/style/index.js
index 334392b2dc..406d1565af 100644
--- a/packages/tree-extension/style/index.js
+++ b/packages/tree-extension/style/index.js
@@ -1,3 +1,3 @@
 import '@jupyterlab/filebrowser/style/index.js';
 
-import './base.css';
+import '@jupyter-notebook/tree/style/index.js';
diff --git a/packages/tree/package.json b/packages/tree/package.json
new file mode 100644
index 0000000000..06419fb253
--- /dev/null
+++ b/packages/tree/package.json
@@ -0,0 +1,66 @@
+{
+  "name": "@jupyter-notebook/tree",
+  "version": "7.0.0-alpha.5",
+  "description": "Jupyter Notebook - Tree",
+  "homepage": "https://github.com/jupyter/notebook",
+  "bugs": {
+    "url": "https://github.com/jupyter/notebook/issues"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/jupyter/notebook.git"
+  },
+  "license": "BSD-3-Clause",
+  "author": "Project Jupyter",
+  "sideEffects": [
+    "style/**/*.css",
+    "style/index.js"
+  ],
+  "main": "lib/index.js",
+  "types": "lib/index.d.ts",
+  "style": "style/index.css",
+  "directories": {
+    "lib": "lib/"
+  },
+  "files": [
+    "lib/*.d.ts",
+    "lib/*.js.map",
+    "lib/*.js",
+    "schema/*.json",
+    "style/**/*.css",
+    "style/index.js"
+  ],
+  "scripts": {
+    "build": "tsc -b",
+    "build:prod": "tsc -b",
+    "clean": "rimraf lib && rimraf tsconfig.tsbuildinfo",
+    "docs": "typedoc src",
+    "prepublishOnly": "npm run build",
+    "watch": "tsc -b --watch"
+  },
+  "dependencies": {
+    "@jupyter-notebook/application": "^7.0.0-alpha.5",
+    "@jupyterlab/application": "^4.0.0-alpha.10",
+    "@jupyterlab/apputils": "^4.0.0-alpha.10",
+    "@jupyterlab/coreutils": "^6.0.0-alpha.10",
+    "@jupyterlab/docmanager": "^4.0.0-alpha.10",
+    "@jupyterlab/filebrowser": "^4.0.0-alpha.10",
+    "@jupyterlab/mainmenu": "^4.0.0-alpha.10",
+    "@jupyterlab/services": "^7.0.0-alpha.10",
+    "@jupyterlab/settingregistry": "^4.0.0-alpha.10",
+    "@jupyterlab/statedb": "^4.0.0-alpha.10",
+    "@jupyterlab/translation": "^4.0.0-alpha.10",
+    "@jupyterlab/ui-components": "^4.0.0-alpha.25",
+    "@lumino/algorithm": "^1.9.1",
+    "@lumino/commands": "^1.20.0",
+    "@lumino/widgets": "^1.32.0"
+  },
+  "devDependencies": {
+    "rimraf": "~3.0.0",
+    "typescript": "~4.6.3"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "styleModule": "style/index.js"
+}
diff --git a/packages/tree/src/index.ts b/packages/tree/src/index.ts
new file mode 100644
index 0000000000..dd239a6187
--- /dev/null
+++ b/packages/tree/src/index.ts
@@ -0,0 +1,2 @@
+export * from './notebook-tree';
+export * from './token';
diff --git a/packages/tree/src/notebook-tree.ts b/packages/tree/src/notebook-tree.ts
new file mode 100644
index 0000000000..28dad32c55
--- /dev/null
+++ b/packages/tree/src/notebook-tree.ts
@@ -0,0 +1,22 @@
+import { TabBarSvg } from '@jupyterlab/ui-components';
+
+import { TabPanel } from '@lumino/widgets';
+
+import { INotebookTree } from './token';
+
+/**
+ * The widget added in main area of the tree view.
+ */
+export class NotebookTreeWidget extends TabPanel implements INotebookTree {
+  /**
+   * Constructor of the NotebookTreeWidget.
+   */
+  constructor() {
+    super({
+      tabPlacement: 'top',
+      tabsMovable: true,
+      renderer: TabBarSvg.defaultRenderer
+    });
+    this.addClass('jp-TreePanel');
+  }
+}
diff --git a/packages/tree/src/token.ts b/packages/tree/src/token.ts
new file mode 100644
index 0000000000..70342c9e7d
--- /dev/null
+++ b/packages/tree/src/token.ts
@@ -0,0 +1,14 @@
+import { Token } from '@lumino/coreutils';
+import { TabPanel } from '@lumino/widgets';
+
+/**
+ * The INotebookTree interface.
+ */
+export interface INotebookTree extends TabPanel {}
+
+/**
+ * The INotebookTree token.
+ */
+export const INotebookTree = new Token<INotebookTree>(
+  '@jupyter-notebook/tree:INotebookTree'
+);
diff --git a/packages/tree-extension/style/base.css b/packages/tree/style/base.css
similarity index 100%
rename from packages/tree-extension/style/base.css
rename to packages/tree/style/base.css
diff --git a/packages/tree/style/index.css b/packages/tree/style/index.css
new file mode 100644
index 0000000000..c6a335ca57
--- /dev/null
+++ b/packages/tree/style/index.css
@@ -0,0 +1,3 @@
+@import url('~@jupyterlab/filebrowser/style/index.css');
+
+@import url('./base.css');
diff --git a/packages/tree/style/index.js b/packages/tree/style/index.js
new file mode 100644
index 0000000000..334392b2dc
--- /dev/null
+++ b/packages/tree/style/index.js
@@ -0,0 +1,3 @@
+import '@jupyterlab/filebrowser/style/index.js';
+
+import './base.css';
diff --git a/packages/tree/tsconfig.json b/packages/tree/tsconfig.json
new file mode 100644
index 0000000000..b223e1a1b8
--- /dev/null
+++ b/packages/tree/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "extends": "../../tsconfigbase",
+  "compilerOptions": {
+    "outDir": "lib",
+    "rootDir": "src"
+  },
+  "include": ["src/**/*"],
+  "references": [
+    {
+      "path": "../application"
+    }
+  ]
+}
diff --git a/yarn.lock b/yarn.lock
index 9e13785786..5a5af46fa9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1388,6 +1388,26 @@
     "@lumino/algorithm" "^1.9.1"
 
 "@jupyter-notebook/tree-extension@file:packages/tree-extension":
+  version "7.0.0-alpha.5"
+  dependencies:
+    "@jupyter-notebook/application" "^7.0.0-alpha.5"
+    "@jupyter-notebook/tree" "^7.0.0-alpha.5"
+    "@jupyterlab/application" "^4.0.0-alpha.10"
+    "@jupyterlab/apputils" "^4.0.0-alpha.10"
+    "@jupyterlab/coreutils" "^6.0.0-alpha.10"
+    "@jupyterlab/docmanager" "^4.0.0-alpha.10"
+    "@jupyterlab/filebrowser" "^4.0.0-alpha.10"
+    "@jupyterlab/mainmenu" "^4.0.0-alpha.10"
+    "@jupyterlab/services" "^7.0.0-alpha.10"
+    "@jupyterlab/settingregistry" "^4.0.0-alpha.10"
+    "@jupyterlab/statedb" "^4.0.0-alpha.10"
+    "@jupyterlab/translation" "^4.0.0-alpha.10"
+    "@jupyterlab/ui-components" "^4.0.0-alpha.25"
+    "@lumino/algorithm" "^1.9.1"
+    "@lumino/commands" "^1.20.0"
+    "@lumino/widgets" "^1.32.0"
+
+"@jupyter-notebook/tree@file:packages/tree":
   version "7.0.0-alpha.5"
   dependencies:
     "@jupyter-notebook/application" "^7.0.0-alpha.5"