diff --git a/apps/nextjs-example/next.config.js b/apps/nextjs-example/next.config.js
index 0c89c2c0..03adef7e 100644
--- a/apps/nextjs-example/next.config.js
+++ b/apps/nextjs-example/next.config.js
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 /** @type {import('next').NextConfig} */
 const stylexPlugin = require('@stylexjs/nextjs-plugin');
 const babelrc = require('./.babelrc.js');
diff --git a/apps/nextjs-example/typetests/test1.tsx b/apps/nextjs-example/typetests/test1.tsx
index b8e2d189..5c395833 100644
--- a/apps/nextjs-example/typetests/test1.tsx
+++ b/apps/nextjs-example/typetests/test1.tsx
@@ -1,3 +1,11 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
 /* eslint-disable no-unused-vars */
 
 import stylex from '@stylexjs/stylex';
diff --git a/apps/nextjs-example/typetests/test2.tsx b/apps/nextjs-example/typetests/test2.tsx
index 41eb2e68..229c3fbe 100644
--- a/apps/nextjs-example/typetests/test2.tsx
+++ b/apps/nextjs-example/typetests/test2.tsx
@@ -1,3 +1,11 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
 /* eslint-disable no-unused-vars */
 
 import stylex from '@stylexjs/stylex';
diff --git a/apps/nextjs-example/typetests/test3.tsx b/apps/nextjs-example/typetests/test3.tsx
index 90fa78fd..36ecd27a 100644
--- a/apps/nextjs-example/typetests/test3.tsx
+++ b/apps/nextjs-example/typetests/test3.tsx
@@ -1,3 +1,11 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
 /* eslint-disable no-unused-vars */
 
 import stylex from '@stylexjs/stylex';
diff --git a/apps/nextjs-example/typetests/test4.tsx b/apps/nextjs-example/typetests/test4.tsx
index 34c7b282..ecc06849 100644
--- a/apps/nextjs-example/typetests/test4.tsx
+++ b/apps/nextjs-example/typetests/test4.tsx
@@ -1,3 +1,11 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
 /* eslint-disable no-unused-vars */
 
 import stylex from '@stylexjs/stylex';
diff --git a/apps/nextjs-example/typetests/typetests.ts b/apps/nextjs-example/typetests/typetests.ts
index 10cd6cec..9d1cc18b 100644
--- a/apps/nextjs-example/typetests/typetests.ts
+++ b/apps/nextjs-example/typetests/typetests.ts
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 import stylex from '@stylexjs/stylex';
 import type {
   StaticStyles,
diff --git a/packages/nextjs-plugin/src/custom-webpack-loader.js b/packages/nextjs-plugin/src/custom-webpack-loader.js
index b9902895..b91cefa9 100644
--- a/packages/nextjs-plugin/src/custom-webpack-loader.js
+++ b/packages/nextjs-plugin/src/custom-webpack-loader.js
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 const PLUGIN_NAME = 'stylex';
 
 module.exports = function stylexLoader(inputCode) {
diff --git a/packages/nextjs-plugin/src/index.js b/packages/nextjs-plugin/src/index.js
index 70eb7287..2a31d09a 100644
--- a/packages/nextjs-plugin/src/index.js
+++ b/packages/nextjs-plugin/src/index.js
@@ -3,8 +3,8 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
  */
+
 const WebpackPluginStylex = require('./custom-webpack-plugin');
 
 let count = 0;
diff --git a/packages/open-props/.babelrc.js b/packages/open-props/.babelrc.js
index 68696427..9e762515 100644
--- a/packages/open-props/.babelrc.js
+++ b/packages/open-props/.babelrc.js
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 module.exports = {
   presets: ['@babel/preset-flow'],
 };
diff --git a/packages/scripts/gen-types.js b/packages/scripts/gen-types.js
index 09a6f839..3401cf52 100755
--- a/packages/scripts/gen-types.js
+++ b/packages/scripts/gen-types.js
@@ -1,5 +1,12 @@
 #!/usr/bin/env node
 
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 const fsPromises = require('fs/promises');
 const monorepoPackage = require('../../package.json');
 const path = require('path');
diff --git a/packages/scripts/handle-flow-modules.js b/packages/scripts/handle-flow-modules.js
index 834c3400..aefc9fa0 100644
--- a/packages/scripts/handle-flow-modules.js
+++ b/packages/scripts/handle-flow-modules.js
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 const fsPromises = require('fs/promises');
 const path = require('path');
 
diff --git a/packages/scripts/rewrite-imports.js b/packages/scripts/rewrite-imports.js
index 98b50856..9837b08a 100755
--- a/packages/scripts/rewrite-imports.js
+++ b/packages/scripts/rewrite-imports.js
@@ -1,5 +1,13 @@
 #!/usr/bin/env node
-// @flow
+
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 const fs = require('fs').promises;
 const path = require('path');