diff --git a/README.md b/README.md
index 29f7ebd..93ef52c 100644
--- a/README.md
+++ b/README.md
@@ -1,14 +1,37 @@
-
-# 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 repos 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.
+# vscode-dts
+
+CLI utility for downloading vscode.d.ts and vscode.proposed.d.ts
+
+## Usage
+
+```bash
+ ~ > npx vscode-dts
+vscode-dts: CLI utility for downloading vscode.d.ts and vscode.proposed.d.ts
+
+Usage:
+  - npx vscode-dts dev            Download vscode.proposed.d.ts
+  - npx vscode-dts <git-tag>      Download vscode.d.ts from git tag of microsoft/vscode
+  - npx vscode-dts <git-branch>   Download vscode.d.ts from git branch of microsoft/vscode
+  - npx vscode-dts                Print Help
+  - npx vscode-dts -h             Print Help
+  - npx vscode-dts --help         Print Help
+ ~ >
+```
+
+## License
+
+[MIT](LICENSE)
+
+## 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 repos 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.
\ No newline at end of file
diff --git a/index.js b/index.js
new file mode 100755
index 0000000..efac8f0
--- /dev/null
+++ b/index.js
@@ -0,0 +1,57 @@
+#!/usr/bin/env node
+
+const https = require('https')
+const fs = require('fs')
+const path = require('path')
+const os = require('os')
+
+const PROPOSED_DTS_URL = 'https://raw.githubusercontent.com/microsoft/vscode/master/src/vs/vscode.proposed.d.ts'
+
+const realArgs = process.argv.slice(2)
+
+if (realArgs.length === 0 || realArgs[0] === '-h' || realArgs[0] === '--help') {
+  console.log(printHelp())
+} else if (realArgs[0] === 'dev') {
+  const outPath = path.resolve(process.cwd(), './vscode.proposed.d.ts')
+  console.log(`Downloading vscode.proposed.d.ts to ${outPath}`)
+  download(PROPOSED_DTS_URL, outPath).then(() => {
+    console.log('Please set "enableProposedApi": true in package.json.')
+    console.log('Read more about proposed API at: https://code.visualstudio.com/api/advanced-topics/using-proposed-api')
+  })
+} else if (realArgs[0]) {
+  const url = `https://raw.githubusercontent.com/microsoft/vscode/${realArgs[0]}/src/vs/vscode.d.ts`
+  const outPath = path.resolve(process.cwd(), './vscode.d.ts')
+  console.log(`Downloading vscode.d.ts to ${outPath} from ${url}`)
+  download(url, outPath)
+}
+
+function printHelp() {
+  return [
+    'vscode-dts: CLI utility for downloading vscode.d.ts and vscode.proposed.d.ts',
+    '',
+    'Usage:',
+    '  - npx vscode-dts dev            Download vscode.proposed.d.ts',
+    '  - npx vscode-dts <git-tag>      Download vscode.d.ts from git tag of microsoft/vscode',
+    '  - npx vscode-dts <git-branch>   Download vscode.d.ts from git branch of microsoft/vscode',
+    '  - npx vscode-dts                Print Help',
+    '  - npx vscode-dts -h             Print Help',
+    '  - npx vscode-dts --help         Print Help'
+  ].join(os.EOL)
+}
+
+function download(url, outPath) {
+  return new Promise((resolve, reject) => {
+    const outStream = fs.createWriteStream(outPath)
+    outStream.on('close', () => {
+      resolve()
+    })
+
+    https.get(url, res => {
+      if (res.statusCode !== 200) {
+        reject(`Failed to get ${url}`)
+      }
+
+      res.pipe(outStream)
+    })
+  })
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..0cad130
--- /dev/null
+++ b/package.json
@@ -0,0 +1,13 @@
+{
+  "name": "vscode-dts",
+  "version": "0.1.0",
+  "description": "CLI utility for downloading vscode.d.ts and vscode.proposed.d.ts",
+  "bin": "index.js",
+  "author": {
+    "name": "Microsoft Corporation"
+  },
+  "license": "MIT",
+  "devDependencies": {
+    "@types/node": "^12.0.2"
+  }
+}
diff --git a/yarn.lock b/yarn.lock
new file mode 100644
index 0000000..362134b
--- /dev/null
+++ b/yarn.lock
@@ -0,0 +1,8 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"@types/node@^12.0.2":
+  version "12.0.2"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-12.0.2.tgz#3452a24edf9fea138b48fad4a0a028a683da1e40"
+  integrity sha512-5tabW/i+9mhrfEOUcLDu2xBPsHJ+X5Orqy9FKpale3SjDA17j5AEpYq5vfy3oAeAHGcvANRCO3NV3d2D6q3NiA==