diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 267a263..e2b2515 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,3 +1,20 @@
+# Contributing
+
+This project welcomes contributions and suggestions. Most contributions require you to
+agree to a Contributor License Agreement (CLA) declaring that you have the right to,
+and actually do, grant us the rights to use your contribution. For details, visit
+https://cla.microsoft.com.
+
+When you submit a pull request, a CLA-bot will automatically determine whether you need
+to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the
+instructions provided by the bot. You will only need to do this once across all repositories using our CLA.
+
+This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/).
+For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/)
+or contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.
+
+## Getting Started
+
 Hey 👋 Thanks for wanting to contribute to `CodeTour`! Getting started is simple:
 
 1. Clone the repository
diff --git a/package-lock.json b/package-lock.json
index 0c7bfa5..0f0e0d7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "codetour",
-  "version": "0.0.39",
+  "version": "0.0.42",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/src/api.ts b/src/api.ts
index c677e4a..f5530b0 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { ExtensionContext } from "vscode";
 import {
   endCurrentCodeTour,
diff --git a/src/commands.ts b/src/commands.ts
index be899ee..e8a1611 100644
--- a/src/commands.ts
+++ b/src/commands.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { registerPlayerCommands } from "./player/commands";
 import { registerRecorderCommands } from "./recorder/commands";
 
diff --git a/src/constants.ts b/src/constants.ts
index b9f65bc..4229b17 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { Uri } from "vscode";
 
 export const EXTENSION_NAME = "codetour";
diff --git a/src/extension.ts b/src/extension.ts
index 9080e89..63ff0af 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import * as vscode from "vscode";
 import { initializeApi } from "./api";
 import { registerCommands } from "./commands";
diff --git a/src/fileSystem/documentProvider.ts b/src/fileSystem/documentProvider.ts
index e012ceb..9954c8a 100644
--- a/src/fileSystem/documentProvider.ts
+++ b/src/fileSystem/documentProvider.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import * as vscode from "vscode";
 import { FS_SCHEME_CONTENT } from "../constants";
 
diff --git a/src/fileSystem/index.ts b/src/fileSystem/index.ts
index 8cbc08c..6ef2e45 100644
--- a/src/fileSystem/index.ts
+++ b/src/fileSystem/index.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import * as path from "path";
 import {
   Disposable,
diff --git a/src/git.ts b/src/git.ts
index 959db11..2ffc161 100644
--- a/src/git.ts
+++ b/src/git.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import * as vscode from "vscode";
 
 export const enum RefType {
diff --git a/src/liveShare/guestService.ts b/src/liveShare/guestService.ts
index 13af009..6b2df8e 100644
--- a/src/liveShare/guestService.ts
+++ b/src/liveShare/guestService.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import * as vsls from "vsls";
 import { EXTENSION_NAME } from "../constants";
 import { startCodeTour } from "../store/actions";
diff --git a/src/liveShare/hostService.ts b/src/liveShare/hostService.ts
index 2512cd7..72a939d 100644
--- a/src/liveShare/hostService.ts
+++ b/src/liveShare/hostService.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { Uri } from "vscode";
 import * as vsls from "vsls";
 import { EXTENSION_NAME } from "../constants";
diff --git a/src/liveShare/index.ts b/src/liveShare/index.ts
index f845516..e620444 100644
--- a/src/liveShare/index.ts
+++ b/src/liveShare/index.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import * as vsls from "vsls";
 import { EXTENSION_NAME } from "../constants";
 
diff --git a/src/liveShare/service.ts b/src/liveShare/service.ts
index e09e2f1..fd04930 100644
--- a/src/liveShare/service.ts
+++ b/src/liveShare/service.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { Uri } from "vscode";
 import { LiveShare, Role, SharedService, SharedServiceProxy } from "vsls";
 import {
diff --git a/src/notebook/index.ts b/src/notebook/index.ts
index 83f8273..b0d5dbd 100644
--- a/src/notebook/index.ts
+++ b/src/notebook/index.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import * as vscode from "vscode";
 import { EXTENSION_NAME, SMALL_ICON_URL } from "../constants";
 import { CodeTour } from "../store";
diff --git a/src/notebook/vscode.proposed.d.ts b/src/notebook/vscode.proposed.d.ts
index fc95ac8..901c0ad 100644
--- a/src/notebook/vscode.proposed.d.ts
+++ b/src/notebook/vscode.proposed.d.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 declare module "vscode" {
   export enum CellKind {
     Markdown = 1,
diff --git a/src/player/commands.ts b/src/player/commands.ts
index 1ca3178..aff0e3c 100644
--- a/src/player/commands.ts
+++ b/src/player/commands.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { when } from "mobx";
 import * as vscode from "vscode";
 import { EXTENSION_NAME } from "../constants";
diff --git a/src/player/decorator.ts b/src/player/decorator.ts
index b944540..2924703 100644
--- a/src/player/decorator.ts
+++ b/src/player/decorator.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { reaction } from "mobx";
 import * as vscode from "vscode";
 import { FS_SCHEME_CONTENT, ICON_URL } from "../constants";
diff --git a/src/player/index.ts b/src/player/index.ts
index ca40125..a2965d5 100644
--- a/src/player/index.ts
+++ b/src/player/index.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { reaction } from "mobx";
 import {
   commands,
diff --git a/src/player/status.ts b/src/player/status.ts
index 7b77007..05d1ab9 100644
--- a/src/player/status.ts
+++ b/src/player/status.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { reaction } from "mobx";
 import * as vscode from "vscode";
 import { EXTENSION_NAME } from "../constants";
diff --git a/src/recorder/commands.ts b/src/recorder/commands.ts
index 0cb133b..cceee3f 100644
--- a/src/recorder/commands.ts
+++ b/src/recorder/commands.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { action, comparer, runInAction } from "mobx";
 import * as path from "path";
 import * as vscode from "vscode";
diff --git a/src/recorder/completionProvider.ts b/src/recorder/completionProvider.ts
index 73c6b25..51f0929 100644
--- a/src/recorder/completionProvider.ts
+++ b/src/recorder/completionProvider.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import * as vscode from "vscode";
 
 const COMMANDS = [
diff --git a/src/store/actions.ts b/src/store/actions.ts
index 4c4182d..620c2bf 100644
--- a/src/store/actions.ts
+++ b/src/store/actions.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { commands, EventEmitter, Memento, Uri, window } from "vscode";
 import { CodeTour, store } from ".";
 import { EXTENSION_NAME, FS_SCHEME, FS_SCHEME_CONTENT } from "../constants";
diff --git a/src/store/index.ts b/src/store/index.ts
index 3f2d360..d5324c1 100644
--- a/src/store/index.ts
+++ b/src/store/index.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { observable } from "mobx";
 import { CommentThread, Uri } from "vscode";
 
diff --git a/src/store/provider.ts b/src/store/provider.ts
index 88e988d..5f93bbd 100644
--- a/src/store/provider.ts
+++ b/src/store/provider.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { comparer, runInAction, set } from "mobx";
 import * as vscode from "vscode";
 import { CodeTour, store } from ".";
diff --git a/src/store/storage.ts b/src/store/storage.ts
index fb92da1..2e42dbf 100644
--- a/src/store/storage.ts
+++ b/src/store/storage.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { observable } from "mobx";
 import { commands, ExtensionContext, Uri, workspace } from "vscode";
 import { CodeTour, store } from ".";
diff --git a/src/tree/index.ts b/src/tree/index.ts
index 8b3e388..d1cb5b1 100644
--- a/src/tree/index.ts
+++ b/src/tree/index.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { reaction } from "mobx";
 import {
   Disposable,
diff --git a/src/tree/nodes.ts b/src/tree/nodes.ts
index 87908fc..df031f0 100644
--- a/src/tree/nodes.ts
+++ b/src/tree/nodes.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import {
   ThemeColor,
   ThemeIcon,
diff --git a/src/utils.ts b/src/utils.ts
index 575bbb0..93be8ea 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import * as os from "os";
 import * as path from "path";
 import { Uri, workspace } from "vscode";