diff --git a/Cargo.toml b/Cargo.toml
index 4ac784c..95fdb85 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,7 @@ members = [
     "tools/winrt-meta",
 ]
 resolver = "2"
+license = "MIT"
 
 [profile.release]
 opt-level = 3
diff --git a/bench-electron/electron.vite.config.ts b/bench-electron/electron.vite.config.ts
index 4915341..6d90128 100644
--- a/bench-electron/electron.vite.config.ts
+++ b/bench-electron/electron.vite.config.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { resolve } from 'path'
 import { defineConfig, externalizeDepsPlugin } from 'electron-vite'
 import react from '@vitejs/plugin-react'
diff --git a/bench-electron/package.json b/bench-electron/package.json
index 3d68617..116958a 100644
--- a/bench-electron/package.json
+++ b/bench-electron/package.json
@@ -1,6 +1,7 @@
 {
   "name": "dynwinrt-bench-electron",
   "version": "1.0.0",
+  "license": "MIT",
   "description": "Electron benchmark for dynwinrt WinRT dynamic invocation",
   "main": "./out/main/index.js",
   "scripts": {
diff --git a/bench-electron/src/main/index.ts b/bench-electron/src/main/index.ts
index 326df85..68c6e45 100644
--- a/bench-electron/src/main/index.ts
+++ b/bench-electron/src/main/index.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { app, BrowserWindow, ipcMain } from 'electron'
 import { join } from 'path'
 import { createRequire } from 'module'
diff --git a/bench-electron/src/preload/index.d.ts b/bench-electron/src/preload/index.d.ts
index b684020..c0e7297 100644
--- a/bench-electron/src/preload/index.d.ts
+++ b/bench-electron/src/preload/index.d.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 declare global {
   interface Window {
     api: {
diff --git a/bench-electron/src/preload/index.ts b/bench-electron/src/preload/index.ts
index c92d4c2..1b6b48e 100644
--- a/bench-electron/src/preload/index.ts
+++ b/bench-electron/src/preload/index.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { contextBridge, ipcRenderer } from 'electron'
 
 const api = {
diff --git a/bindings/js/__test__/index.spec.ts b/bindings/js/__test__/index.spec.ts
index e652ff9..b3212b0 100644
--- a/bindings/js/__test__/index.spec.ts
+++ b/bindings/js/__test__/index.spec.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import test from 'ava'
 
 import {
diff --git a/bindings/js/__test__/package.json b/bindings/js/__test__/package.json
index 3dbc1ca..3de1080 100644
--- a/bindings/js/__test__/package.json
+++ b/bindings/js/__test__/package.json
@@ -1,3 +1,4 @@
 {
-  "type": "module"
+  "type": "module",
+  "license": "MIT"
 }
diff --git a/bindings/js/benchmark/bench.ts b/bindings/js/benchmark/bench.ts
index 2128b55..252b10e 100644
--- a/bindings/js/benchmark/bench.ts
+++ b/bindings/js/benchmark/bench.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import { Bench } from 'tinybench'
 
 import { plus100 } from '../index.js'
diff --git a/bindings/js/benchmark/package.json b/bindings/js/benchmark/package.json
index 3dbc1ca..3de1080 100644
--- a/bindings/js/benchmark/package.json
+++ b/bindings/js/benchmark/package.json
@@ -1,3 +1,4 @@
 {
-  "type": "module"
+  "type": "module",
+  "license": "MIT"
 }
diff --git a/bindings/js/samples/array_struct.ts b/bindings/js/samples/array_struct.ts
index a947ece..541fa29 100644
--- a/bindings/js/samples/array_struct.ts
+++ b/bindings/js/samples/array_struct.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 /**
  * Test: Array and Struct bindings for dynwinrt-js
  *
diff --git a/bindings/js/samples/bench_3way.ts b/bindings/js/samples/bench_3way.ts
index 079cb44..a17a15c 100644
--- a/bindings/js/samples/bench_3way.ts
+++ b/bindings/js/samples/bench_3way.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 /**
  * 4-way benchmark: C++ static vs Rust raw N-API vs Rust napi-rs vs Dynamic
  *
diff --git a/bindings/js/samples/benchmark.ts b/bindings/js/samples/benchmark.ts
index 74820e1..44d8ecc 100644
--- a/bindings/js/samples/benchmark.ts
+++ b/bindings/js/samples/benchmark.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 /**
  * Benchmark: JS → C++/WinRT static projection vs JS → dynwinrt (end-to-end)
  *
diff --git a/bindings/js/samples/ocr.ts b/bindings/js/samples/ocr.ts
index 06d945e..5eeb9b9 100644
--- a/bindings/js/samples/ocr.ts
+++ b/bindings/js/samples/ocr.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 /**
  * OCR Demo: Pure dynamic WinRT calls using registerInterface + invoke.
  * Requires WinAppSDK with AI features and package identity.
diff --git a/bindings/js/samples/picker.ts b/bindings/js/samples/picker.ts
index 1ac82a1..a4adb82 100644
--- a/bindings/js/samples/picker.ts
+++ b/bindings/js/samples/picker.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 import {
     initWinappsdk,
     DynWinRtValue,
diff --git a/bindings/js/samples/test_progress.ts b/bindings/js/samples/test_progress.ts
index 7751ac6..794c9c3 100644
--- a/bindings/js/samples/test_progress.ts
+++ b/bindings/js/samples/test_progress.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 /**
  * Test: IAsyncOperationWithProgress progress handler
  * Uses InMemoryRandomAccessStream.WriteAsync → IAsyncOperationWithProgress<u32, u32>
diff --git a/bindings/js/samples/test_register_interface.ts b/bindings/js/samples/test_register_interface.ts
index 9269f75..8b2e971 100644
--- a/bindings/js/samples/test_register_interface.ts
+++ b/bindings/js/samples/test_register_interface.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 /**
  * Test: registerInterface + addMethod + method/methodByName + invoke
  * Uses Windows.Foundation.Uri (no WinAppSDK needed)
diff --git a/bindings/js/src/lib.rs b/bindings/js/src/lib.rs
index 518b293..bd763e8 100644
--- a/bindings/js/src/lib.rs
+++ b/bindings/js/src/lib.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 #![deny(clippy::all)]
 #![allow(clippy::missing_safety_doc)]
 
diff --git a/bindings/js/static-bench-cpp/find_sdk.js b/bindings/js/static-bench-cpp/find_sdk.js
index a11a105..6c07684 100644
--- a/bindings/js/static-bench-cpp/find_sdk.js
+++ b/bindings/js/static-bench-cpp/find_sdk.js
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 // Finds the C++/WinRT include directory from the latest Windows SDK.
 const fs = require('fs');
 const path = require('path');
diff --git a/bindings/js/static-bench-cpp/package.json b/bindings/js/static-bench-cpp/package.json
index 95a9968..3404355 100644
--- a/bindings/js/static-bench-cpp/package.json
+++ b/bindings/js/static-bench-cpp/package.json
@@ -2,6 +2,7 @@
   "name": "static-bench-cppwinrt",
   "version": "1.0.0",
   "private": true,
+  "license": "MIT",
   "description": "C++/WinRT static projection benchmark addon (pure C++, no Rust)",
   "scripts": {
     "build": "node-gyp rebuild --release",
diff --git a/bindings/js/static-bench-rust/Cargo.toml b/bindings/js/static-bench-rust/Cargo.toml
index 9c9a52a..cd6d497 100644
--- a/bindings/js/static-bench-rust/Cargo.toml
+++ b/bindings/js/static-bench-rust/Cargo.toml
@@ -2,6 +2,7 @@
 name = "static-bench-rust"
 version = "0.1.0"
 edition = "2021"
+license = "MIT"
 
 [lib]
 crate-type = ["cdylib"]
diff --git a/bindings/js/static-bench-rust/build.rs b/bindings/js/static-bench-rust/build.rs
index b827f5d..c7e589e 100644
--- a/bindings/js/static-bench-rust/build.rs
+++ b/bindings/js/static-bench-rust/build.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 fn main() {
     // Link against node.lib so N-API symbols resolve at load time.
     // node-gyp puts node.lib in the node-gyp cache; napi-build finds it.
diff --git a/bindings/js/static-bench-rust/src/lib.rs b/bindings/js/static-bench-rust/src/lib.rs
index 7c5ccdc..c906586 100644
--- a/bindings/js/static-bench-rust/src/lib.rs
+++ b/bindings/js/static-bench-rust/src/lib.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 //! Raw N-API Rust static benchmark — minimal overhead, no napi-rs macros.
 //! Matches the C++ static-bench-cpp addon 1:1.
 
diff --git a/bindings/py/src/lib.rs b/bindings/py/src/lib.rs
index 2466205..a989f3f 100644
--- a/bindings/py/src/lib.rs
+++ b/bindings/py/src/lib.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use pyo3::prelude::*;
 
 mod runtime;
diff --git a/bindings/py/src/runtime.rs b/bindings/py/src/runtime.rs
index 278a601..f433ebe 100644
--- a/bindings/py/src/runtime.rs
+++ b/bindings/py/src/runtime.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::sync::Arc;
 
 use dynwinrt;
diff --git a/bindings/py/src/values.rs b/bindings/py/src/values.rs
index 44a51cc..cf52c97 100644
--- a/bindings/py/src/values.rs
+++ b/bindings/py/src/values.rs
@@ -1 +1,4 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 // Value conversion utilities — currently handled inline in runtime.rs
diff --git a/bindings/py/tests/test_basic.py b/bindings/py/tests/test_basic.py
index 8ad2ed2..bd89524 100644
--- a/bindings/py/tests/test_basic.py
+++ b/bindings/py/tests/test_basic.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
 import dynwinrt_py
 from dynwinrt_py import (
     DynWinRTType,
diff --git a/bindings/py/tests/test_runtime.py b/bindings/py/tests/test_runtime.py
index 675e079..da24cdc 100644
--- a/bindings/py/tests/test_runtime.py
+++ b/bindings/py/tests/test_runtime.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
 import dynwinrt_py
 
 def test_winrt_method():
diff --git a/crates/dynwinrt/benches/bench.rs b/crates/dynwinrt/benches/bench.rs
index 278ec1d..15bfb1f 100644
--- a/crates/dynwinrt/benches/bench.rs
+++ b/crates/dynwinrt/benches/bench.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 //! Benchmarks: dynwinrt dynamic invocation vs windows-rs static projection.
 //!
 //! Groups:
diff --git a/crates/dynwinrt/build.rs b/crates/dynwinrt/build.rs
index f328e4d..b0d5c0f 100644
--- a/crates/dynwinrt/build.rs
+++ b/crates/dynwinrt/build.rs
@@ -1 +1,4 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 fn main() {}
diff --git a/crates/dynwinrt/src/abi.rs b/crates/dynwinrt/src/abi.rs
index f2d8604..434db97 100644
--- a/crates/dynwinrt/src/abi.rs
+++ b/crates/dynwinrt/src/abi.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum AbiType {
     Bool,
diff --git a/crates/dynwinrt/src/array.rs b/crates/dynwinrt/src/array.rs
index 0f4640a..38e8ce4 100644
--- a/crates/dynwinrt/src/array.rs
+++ b/crates/dynwinrt/src/array.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use core::ffi::c_void;
 use windows_core::{IUnknown, Interface};
 
diff --git a/crates/dynwinrt/src/call.rs b/crates/dynwinrt/src/call.rs
index e851e79..2d4adea 100644
--- a/crates/dynwinrt/src/call.rs
+++ b/crates/dynwinrt/src/call.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use core::ffi::c_void;
 use libffi::middle::{Arg, arg};
 use windows_core::{HRESULT, Interface};
diff --git a/crates/dynwinrt/src/com_helpers.rs b/crates/dynwinrt/src/com_helpers.rs
index a639a69..a0d9e76 100644
--- a/crates/dynwinrt/src/com_helpers.rs
+++ b/crates/dynwinrt/src/com_helpers.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 #![allow(unsafe_op_in_unsafe_fn)]
 //! Shared COM boilerplate macros and helpers for dynamic WinRT collection implementations.
 //!
diff --git a/crates/dynwinrt/src/dasync.rs b/crates/dynwinrt/src/dasync.rs
index 1d459d1..e30b36f 100644
--- a/crates/dynwinrt/src/dasync.rs
+++ b/crates/dynwinrt/src/dasync.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::future::{Future, IntoFuture};
 use std::pin::Pin;
 use std::sync::{Arc, Mutex};
diff --git a/crates/dynwinrt/src/delegate.rs b/crates/dynwinrt/src/delegate.rs
index 6c911c5..23226b1 100644
--- a/crates/dynwinrt/src/delegate.rs
+++ b/crates/dynwinrt/src/delegate.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 //! Dynamic WinRT delegate (callback) implementation.
 //!
 //! A delegate is a COM object with IUnknown + a single `Invoke` method.
diff --git a/crates/dynwinrt/src/interfaces.rs b/crates/dynwinrt/src/interfaces.rs
index d74f405..bc80f88 100644
--- a/crates/dynwinrt/src/interfaces.rs
+++ b/crates/dynwinrt/src/interfaces.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::sync::Arc;
 use crate::signature::{InterfaceSignature, MethodSignature};
 use crate::metadata_table::MetadataTable;
diff --git a/crates/dynwinrt/src/lib.rs b/crates/dynwinrt/src/lib.rs
index 1f6aaa9..ada7674 100644
--- a/crates/dynwinrt/src/lib.rs
+++ b/crates/dynwinrt/src/lib.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use windows::core::*;
 
 mod abi;
diff --git a/crates/dynwinrt/src/map.rs b/crates/dynwinrt/src/map.rs
index 1619d9c..df77ee2 100644
--- a/crates/dynwinrt/src/map.rs
+++ b/crates/dynwinrt/src/map.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 #![allow(unsafe_op_in_unsafe_fn)]
 //! Dynamic WinRT IMap<K,V> / IMapView<K,V> / IKeyValuePair<K,V> / IIterable implementation.
 //!
diff --git a/crates/dynwinrt/src/meta.rs b/crates/dynwinrt/src/meta.rs
index 8f86d10..e41785f 100644
--- a/crates/dynwinrt/src/meta.rs
+++ b/crates/dynwinrt/src/meta.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 #[cfg(test)]
 mod tests {
     #[test]
diff --git a/crates/dynwinrt/src/metadata_table/arena.rs b/crates/dynwinrt/src/metadata_table/arena.rs
index a9a0b32..4646de7 100644
--- a/crates/dynwinrt/src/metadata_table/arena.rs
+++ b/crates/dynwinrt/src/metadata_table/arena.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::alloc::Layout;
 
 use windows_core::GUID;
diff --git a/crates/dynwinrt/src/metadata_table/iid.rs b/crates/dynwinrt/src/metadata_table/iid.rs
index 8c65188..df8ccb4 100644
--- a/crates/dynwinrt/src/metadata_table/iid.rs
+++ b/crates/dynwinrt/src/metadata_table/iid.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use windows_core::GUID;
 
 use super::MetadataTable;
diff --git a/crates/dynwinrt/src/metadata_table/method_handle.rs b/crates/dynwinrt/src/metadata_table/method_handle.rs
index 222fda5..ebe4cc2 100644
--- a/crates/dynwinrt/src/metadata_table/method_handle.rs
+++ b/crates/dynwinrt/src/metadata_table/method_handle.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::sync::Arc;
 
 use crate::value::WinRTValue;
diff --git a/crates/dynwinrt/src/metadata_table/mod.rs b/crates/dynwinrt/src/metadata_table/mod.rs
index 26d6143..87e055d 100644
--- a/crates/dynwinrt/src/metadata_table/mod.rs
+++ b/crates/dynwinrt/src/metadata_table/mod.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 mod type_kind;
 mod type_handle;
 mod value_data;
diff --git a/crates/dynwinrt/src/metadata_table/type_handle.rs b/crates/dynwinrt/src/metadata_table/type_handle.rs
index a45998d..5d962a8 100644
--- a/crates/dynwinrt/src/metadata_table/type_handle.rs
+++ b/crates/dynwinrt/src/metadata_table/type_handle.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::alloc::Layout;
 use std::sync::Arc;
 
diff --git a/crates/dynwinrt/src/metadata_table/type_kind.rs b/crates/dynwinrt/src/metadata_table/type_kind.rs
index ca6eb95..ce4e5dc 100644
--- a/crates/dynwinrt/src/metadata_table/type_kind.rs
+++ b/crates/dynwinrt/src/metadata_table/type_kind.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use windows_core::{GUID, Interface};
 
 // ===========================================================================
diff --git a/crates/dynwinrt/src/metadata_table/value_data.rs b/crates/dynwinrt/src/metadata_table/value_data.rs
index 8abcae9..d087dd2 100644
--- a/crates/dynwinrt/src/metadata_table/value_data.rs
+++ b/crates/dynwinrt/src/metadata_table/value_data.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use core::ffi::c_void;
 use windows_core::{IUnknown, Interface};
 
diff --git a/crates/dynwinrt/src/result.rs b/crates/dynwinrt/src/result.rs
index 2a7bba2..6aec87a 100644
--- a/crates/dynwinrt/src/result.rs
+++ b/crates/dynwinrt/src/result.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use crate::metadata_table::TypeKind;
 use crate::abi::AbiType;
 
diff --git a/crates/dynwinrt/src/roapi.rs b/crates/dynwinrt/src/roapi.rs
index c5af75f..45b5e8c 100644
--- a/crates/dynwinrt/src/roapi.rs
+++ b/crates/dynwinrt/src/roapi.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use windows::Win32::System::WinRT::{IActivationFactory, RoGetActivationFactory};
 use windows::Win32::System::LibraryLoader::{LoadLibraryW, GetProcAddress};
 use windows_core::{HSTRING, HRESULT, IUnknown, Interface, PCSTR};
diff --git a/crates/dynwinrt/src/signature.rs b/crates/dynwinrt/src/signature.rs
index 75eef7d..b0c6ba6 100644
--- a/crates/dynwinrt/src/signature.rs
+++ b/crates/dynwinrt/src/signature.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use libffi::middle::Cif;
 use std::sync::Arc;
 use windows::core::{GUID, HSTRING, Interface};
diff --git a/crates/dynwinrt/src/value.rs b/crates/dynwinrt/src/value.rs
index c1c2571..ff4e7b8 100644
--- a/crates/dynwinrt/src/value.rs
+++ b/crates/dynwinrt/src/value.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use libffi::middle::Arg;
 use windows::Win32::System::WinRT::IActivationFactory;
 use windows_core::{GUID, IUnknown, Interface};
diff --git a/crates/dynwinrt/src/vector.rs b/crates/dynwinrt/src/vector.rs
index ae97677..8acb2a1 100644
--- a/crates/dynwinrt/src/vector.rs
+++ b/crates/dynwinrt/src/vector.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 #![allow(unsafe_op_in_unsafe_fn)]
 //! Dynamic WinRT IVector<T> / IIterable<T> / IVectorView<T> / IIterator<T> implementation.
 //!
diff --git a/crates/dynwinrt/src/winapp.rs b/crates/dynwinrt/src/winapp.rs
index de652a7..e690ede 100644
--- a/crates/dynwinrt/src/winapp.rs
+++ b/crates/dynwinrt/src/winapp.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::ffi::CString;
 
 use windows::ApplicationModel::PackageVersion;
diff --git a/tests/sample/package.json b/tests/sample/package.json
index f677aa4..9abca28 100644
--- a/tests/sample/package.json
+++ b/tests/sample/package.json
@@ -1,5 +1,6 @@
 {
   "private": true,
+  "license": "MIT",
   "dependencies": {
     "dynwinrt-js": "file:./dynwinrt-js"
   }
diff --git a/tests/sample/test_picker.ts b/tests/sample/test_picker.ts
index 9f2508b..0c3515f 100644
--- a/tests/sample/test_picker.ts
+++ b/tests/sample/test_picker.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 /**
  * End-to-end test using 100% winrt-meta generated bindings + dynwinrt-js.
  * Tests: create picker, set properties, use IVector_String.append(), open dialog.
diff --git a/tests/sample/test_uri.ts b/tests/sample/test_uri.ts
index de69a91..60dd4a6 100644
--- a/tests/sample/test_uri.ts
+++ b/tests/sample/test_uri.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 /**
  * Basic test using Windows SDK only — no WinAppSDK needed.
  * Run: ./winrt-meta.exe generate --namespace "Windows.Foundation" --class-name "Uri" --output ./generated-uri
diff --git a/tests/test_simple_array.rs b/tests/test_simple_array.rs
index ef12c25..f61bf44 100644
--- a/tests/test_simple_array.rs
+++ b/tests/test_simple_array.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 // Simple test for PropertyValue.CreateInt32Array
 // This is the SIMPLEST possible array API to test with
 
diff --git a/tools/winrt-meta/npm/cli.js b/tools/winrt-meta/npm/cli.js
index 8d87693..a9b5fb9 100644
--- a/tools/winrt-meta/npm/cli.js
+++ b/tools/winrt-meta/npm/cli.js
@@ -1,4 +1,7 @@
 #!/usr/bin/env node
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 const { execFileSync } = require("child_process");
 const path = require("path");
 const fs = require("fs");
diff --git a/tools/winrt-meta/npm/lib/compile.js b/tools/winrt-meta/npm/lib/compile.js
index 9eab193..ba0cb7c 100644
--- a/tools/winrt-meta/npm/lib/compile.js
+++ b/tools/winrt-meta/npm/lib/compile.js
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 const path = require("path");
 const fs = require("fs");
 
diff --git a/tools/winrt-meta/src/codegen/common.rs b/tools/winrt-meta/src/codegen/common.rs
index 0bc4a90..d3b4a81 100644
--- a/tools/winrt-meta/src/codegen/common.rs
+++ b/tools/winrt-meta/src/codegen/common.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::collections::HashSet;
 use std::sync::LazyLock;
 
diff --git a/tools/winrt-meta/src/codegen/method.rs b/tools/winrt-meta/src/codegen/method.rs
index 4c378d4..9b731e3 100644
--- a/tools/winrt-meta/src/codegen/method.rs
+++ b/tools/winrt-meta/src/codegen/method.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::collections::HashSet;
 
 use crate::meta::{InterfaceMeta, MethodMeta, ParamDirection};
diff --git a/tools/winrt-meta/src/codegen/mod.rs b/tools/winrt-meta/src/codegen/mod.rs
index 6fd8011..7f826ca 100644
--- a/tools/winrt-meta/src/codegen/mod.rs
+++ b/tools/winrt-meta/src/codegen/mod.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 pub mod common;
 pub(crate) mod method;
 pub mod typescript;
diff --git a/tools/winrt-meta/src/codegen/typescript.rs b/tools/winrt-meta/src/codegen/typescript.rs
index b3bd09e..d7f30c6 100644
--- a/tools/winrt-meta/src/codegen/typescript.rs
+++ b/tools/winrt-meta/src/codegen/typescript.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::collections::HashSet;
 
 use crate::meta::{ClassMeta, InterfaceMeta, ParamDirection};
diff --git a/tools/winrt-meta/src/lib.rs b/tools/winrt-meta/src/lib.rs
index 2a8fbb4..213aa90 100644
--- a/tools/winrt-meta/src/lib.rs
+++ b/tools/winrt-meta/src/lib.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 pub mod codegen;
 pub mod meta;
 pub mod types;
diff --git a/tools/winrt-meta/src/main.rs b/tools/winrt-meta/src/main.rs
index abf2e81..5695b65 100644
--- a/tools/winrt-meta/src/main.rs
+++ b/tools/winrt-meta/src/main.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::collections::{HashMap, HashSet};
 use std::fs;
 use std::path::Path;
diff --git a/tools/winrt-meta/src/meta.rs b/tools/winrt-meta/src/meta.rs
index 71d0592..e1bfadf 100644
--- a/tools/winrt-meta/src/meta.rs
+++ b/tools/winrt-meta/src/meta.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 use std::collections::HashSet;
 use std::path::Path;
 
diff --git a/tools/winrt-meta/src/types.rs b/tools/winrt-meta/src/types.rs
index 5d323ce..d152b14 100644
--- a/tools/winrt-meta/src/types.rs
+++ b/tools/winrt-meta/src/types.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 /// The kind of a named WinRT type reference.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
 pub enum TypeKind {
diff --git a/tools/winrt-meta/tests/snapshot_test.rs b/tools/winrt-meta/tests/snapshot_test.rs
index 2cd6887..0a026e0 100644
--- a/tools/winrt-meta/tests/snapshot_test.rs
+++ b/tools/winrt-meta/tests/snapshot_test.rs
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 //! E2E snapshot test: generate TypeScript for Windows.Foundation.Uri and compare
 //! against committed snapshots.
 //!