diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 00000000..bebfe531
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,176 @@
+# Contributing | Firebase Admin Dart SDK
+
+Thank you for contributing to the Firebase community!
+
+ - [Have a usage question?](#question)
+ - [Think you found a bug?](#issue)
+ - [Have a feature request?](#feature)
+ - [Want to submit a pull request?](#submit)
+ - [Need to get set up locally?](#local-setup)
+
+
+## <a name="question"></a>Have a usage question?
+
+We get lots of those and we love helping you, but GitHub is not the best place for them. Issues
+which just ask about usage will be closed. Here are some resources to get help:
+
+- Go through the [guides](https://firebase.google.com/docs/admin/setup/)
+- Read the full [API reference](https://pub.dev/documentation/dart_firebase_admin/latest/)
+
+If the official documentation doesn't help, try asking a question on [Stack Overflow](https://stackoverflow.com/questions/tagged/firebase+dart).
+
+**Please avoid double posting across multiple channels!**
+
+
+## <a name="issue"></a>Think you found a bug?
+
+Yeah, we're definitely not perfect!
+
+Search through [old issues](https://github.com/firebase/firebase-admin-dart/issues) before
+submitting a new issue as your question may have already been answered.
+
+If your issue appears to be a bug, and hasn't been reported,
+[open a new issue](https://github.com/firebase/firebase-admin-dart/issues/new). Please use the
+provided bug report template and include a minimal repro.
+
+If you are up to the challenge, [submit a pull request](#submit) with a fix!
+
+
+## <a name="feature"></a>Have a feature request?
+
+Great, we love hearing how we can improve our products! Share you idea through our
+[feature request support channel](https://firebase.google.com/support/contact/bugs-features/).
+
+
+## <a name="submit"></a>Want to submit a pull request?
+
+Sweet, we'd love to accept your contribution!
+[Open a new pull request](https://github.com/firebase/firebase-admin-dart/pulls) and fill
+out the provided template.
+
+**If you want to implement a new feature, please open an issue with a proposal first so that we can
+figure out if the feature makes sense and how it will work.**
+
+Make sure your changes pass our linter and the tests all pass on your local machine. We've hooked
+up this repo with continuous integration to double check those things for you.
+
+Most non-trivial changes should include some extra test coverage. If you aren't sure how to add
+tests, feel free to submit regardless and ask us for some advice.
+
+Finally, you will need to sign our
+[Contributor License Agreement](https://cla.developers.google.com/about/google-individual),
+and go through our code review process before we can accept your pull request.
+
+### Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement. You (or your employer) retain the copyright to your contribution.
+This simply gives us permission to use and redistribute your contributions as
+part of the project. Head over to <https://cla.developers.google.com/> to see
+your current agreements on file or to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+### Code reviews
+
+All submissions, including submissions by project members, require review. We
+use GitHub pull requests for this purpose. Consult
+[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
+information on using pull requests.
+
+
+## <a name="local-setup"></a>Need to get set up locally?
+
+### Prerequisites
+
+1. [Dart SDK](https://dart.dev/get-dart) (Latest stable version recommended).
+2. [Melos](https://melos.invertase.dev/) (`dart pub global activate melos`).
+3. Google Cloud SDK ([`gcloud`](https://cloud.google.com/sdk/downloads) utility).
+
+### Initial Setup
+
+Run the following commands from the command line to get your local environment set up:
+
+```bash
+$ git clone https://github.com/firebase/firebase-admin-dart.git
+$ cd firebase-admin-dart    # go to the firebase-admin-dart directory
+$ melos bootstrap           # install dependencies and link packages
+```
+
+In order to run the integration tests, you also need to authorize the `gcloud` utility with
+Google application default credentials:
+
+```bash
+$ gcloud beta auth application-default login
+```
+
+### Running the Linter
+
+Source files are written in Dart and analyzed using the standard Dart analyzer. Run the following command to analyze the project:
+
+```bash
+$ melos run analyze
+# OR
+$ dart analyze .
+```
+
+### Running Tests
+
+There are two types of tests: unit and integration. The unit tests are intended to be run during
+development, and the integration tests are intended to be run validation against a real Environment or Emulator Suite.
+
+#### Unit Tests
+
+To run the unit tests for all packages:
+
+```bash
+$ melos exec -- dart test
+```
+
+Or for a specific package, navigate to the package directory and run `dart test`:
+
+```bash
+$ cd packages/dart_firebase_admin
+$ dart test
+```
+
+#### Integration Tests with Emulator Suite
+
+Some of the integration tests work with the Emulator Suite and you can run them
+without an actual Firebase project.
+
+First, make sure to [install Firebase CLI](https://firebase.google.com/docs/cli#install_the_firebase_cli).
+And then start the emulators:
+
+```bash
+$ firebase emulators:start --only firestore,auth
+```
+
+Then run the tests with the necessary environment variables:
+
+```bash
+$ export FIRESTORE_EMULATOR_HOST=localhost:8080
+$ export FIREBASE_AUTH_EMULATOR_HOST=localhost:9099
+$ dart test test/firestore/firestore_integration_test.dart
+```
+
+#### Integration Tests with an actual Firebase project
+
+Integration tests are executed against a real life Firebase project. If you do not already
+have one suitable for running the tests against, you can create a new project in the
+[Firebase Console](https://console.firebase.google.com) following the setup guide below.
+If you already have a Firebase project, you'll need to obtain credentials to communicate and
+authorize access to your Firebase project.
+
+See `packages/dart_firebase_admin/README.md` for more details on project setup if needed.
+
+### Repo Organization
+
+This repository is a monorepo managed by Melos.
+
+* `packages/` - Contains all the source packages.
+  * `dart_firebase_admin/` - The main Firebase Admin SDK package.
+  * `googleapis_firestore/` - Stand-alone Firestore package.
+  * `googleapis_storage/` - Stand-alone Google Cloud Storage package.
diff --git a/LICENSE b/LICENSE
index e006cb1d..cb7d4dee 100644
--- a/LICENSE
+++ b/LICENSE
@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2020 Invertase Limited
+   Copyright 2026 Google LLC
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
diff --git a/gen-version.sh b/gen-version.sh
index d108fd81..ee8402ef 100755
--- a/gen-version.sh
+++ b/gen-version.sh
@@ -1,4 +1,18 @@
 #!/bin/bash
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 
 # Script to generate version.g.dart files for all packages
 # Finds all packages/*/pubspec.yaml files, extracts version, and writes to package/lib/version.g.dart
@@ -29,6 +43,20 @@ find "$SCRIPT_DIR/packages" -name "pubspec.yaml" -type f | while read -r pubspec
   # Write version.g.dart file
   version_file="$lib_dir/version.g.dart"
   cat > "$version_file" << EOF
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // GENERATED CODE - DO NOT MODIFY BY HAND
 // This file is generated by gen-version.sh
 
@@ -39,4 +67,4 @@ EOF
   echo "Generated $version_file with version: $version"
 done
 
-echo "Version generation complete!"
\ No newline at end of file
+echo "Version generation complete!"
diff --git a/packages/dart_firebase_admin/LICENSE b/packages/dart_firebase_admin/LICENSE
index e006cb1d..cb7d4dee 100644
--- a/packages/dart_firebase_admin/LICENSE
+++ b/packages/dart_firebase_admin/LICENSE
@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2020 Invertase Limited
+   Copyright 2026 Google LLC
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
diff --git a/packages/dart_firebase_admin/example/example_functions_ts/src/index.ts b/packages/dart_firebase_admin/example/example_functions_ts/src/index.ts
index 46c66104..5bae76ee 100644
--- a/packages/dart_firebase_admin/example/example_functions_ts/src/index.ts
+++ b/packages/dart_firebase_admin/example/example_functions_ts/src/index.ts
@@ -1,3 +1,19 @@
+/**
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 /**
  * Import function triggers from their respective submodules:
  *
diff --git a/packages/dart_firebase_admin/example/lib/app_check_example.dart b/packages/dart_firebase_admin/example/lib/app_check_example.dart
index 928dd32f..5d4c5810 100644
--- a/packages/dart_firebase_admin/example/lib/app_check_example.dart
+++ b/packages/dart_firebase_admin/example/lib/app_check_example.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/app_check.dart';
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 
diff --git a/packages/dart_firebase_admin/example/lib/auth_example.dart b/packages/dart_firebase_admin/example/lib/auth_example.dart
index b637b3bc..42424bfc 100644
--- a/packages/dart_firebase_admin/example/lib/auth_example.dart
+++ b/packages/dart_firebase_admin/example/lib/auth_example.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/auth.dart';
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 
diff --git a/packages/dart_firebase_admin/example/lib/firestore_example.dart b/packages/dart_firebase_admin/example/lib/firestore_example.dart
index 3354b3aa..1560efd8 100644
--- a/packages/dart_firebase_admin/example/lib/firestore_example.dart
+++ b/packages/dart_firebase_admin/example/lib/firestore_example.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
diff --git a/packages/dart_firebase_admin/example/lib/functions_example.dart b/packages/dart_firebase_admin/example/lib/functions_example.dart
index d118b93d..5c4aebb2 100644
--- a/packages/dart_firebase_admin/example/lib/functions_example.dart
+++ b/packages/dart_firebase_admin/example/lib/functions_example.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 import 'package:dart_firebase_admin/functions.dart';
 
diff --git a/packages/dart_firebase_admin/example/lib/main.dart b/packages/dart_firebase_admin/example/lib/main.dart
index b92c2419..dc8ae16b 100644
--- a/packages/dart_firebase_admin/example/lib/main.dart
+++ b/packages/dart_firebase_admin/example/lib/main.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 
 Future<void> main() async {
diff --git a/packages/dart_firebase_admin/example/lib/messaging_example.dart b/packages/dart_firebase_admin/example/lib/messaging_example.dart
index ce8b73fe..61459466 100644
--- a/packages/dart_firebase_admin/example/lib/messaging_example.dart
+++ b/packages/dart_firebase_admin/example/lib/messaging_example.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 import 'package:dart_firebase_admin/messaging.dart';
 
diff --git a/packages/dart_firebase_admin/example/lib/security_rules_example.dart b/packages/dart_firebase_admin/example/lib/security_rules_example.dart
index 6cb5fa3e..a06a179a 100644
--- a/packages/dart_firebase_admin/example/lib/security_rules_example.dart
+++ b/packages/dart_firebase_admin/example/lib/security_rules_example.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 import 'package:dart_firebase_admin/security_rules.dart';
 
diff --git a/packages/dart_firebase_admin/example/lib/storage_example.dart b/packages/dart_firebase_admin/example/lib/storage_example.dart
index 3eaccc4e..7ef257e1 100644
--- a/packages/dart_firebase_admin/example/lib/storage_example.dart
+++ b/packages/dart_firebase_admin/example/lib/storage_example.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:convert';
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 import 'package:dart_firebase_admin/storage.dart';
diff --git a/packages/dart_firebase_admin/example/run_with_emulator.sh b/packages/dart_firebase_admin/example/run_with_emulator.sh
index dbfe3e09..2b8c9bac 100755
--- a/packages/dart_firebase_admin/example/run_with_emulator.sh
+++ b/packages/dart_firebase_admin/example/run_with_emulator.sh
@@ -1,4 +1,18 @@
 #!/bin/bash
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 
 # Set environment variables for emulator
 export FIRESTORE_EMULATOR_HOST=localhost:8080
diff --git a/packages/dart_firebase_admin/example/run_with_prod.sh b/packages/dart_firebase_admin/example/run_with_prod.sh
index 196cd868..0b13fd79 100755
--- a/packages/dart_firebase_admin/example/run_with_prod.sh
+++ b/packages/dart_firebase_admin/example/run_with_prod.sh
@@ -1,4 +1,18 @@
 #!/bin/bash
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 
 # Run example against Firebase production
 #
diff --git a/packages/dart_firebase_admin/example_server_app/bin/server.dart b/packages/dart_firebase_admin/example_server_app/bin/server.dart
index 739a3e29..15176dec 100644
--- a/packages/dart_firebase_admin/example_server_app/bin/server.dart
+++ b/packages/dart_firebase_admin/example_server_app/bin/server.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:convert';
 import 'dart:io';
 
diff --git a/packages/dart_firebase_admin/example_server_app/test/server_test.dart b/packages/dart_firebase_admin/example_server_app/test/server_test.dart
index 3081d874..baedd4ee 100644
--- a/packages/dart_firebase_admin/example_server_app/test/server_test.dart
+++ b/packages/dart_firebase_admin/example_server_app/test/server_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:io';
 
 import 'package:http/http.dart';
diff --git a/packages/dart_firebase_admin/lib/app_check.dart b/packages/dart_firebase_admin/lib/app_check.dart
index 8c671d5b..410b2349 100644
--- a/packages/dart_firebase_admin/lib/app_check.dart
+++ b/packages/dart_firebase_admin/lib/app_check.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 export 'src/app_check/app_check.dart'
     hide AppCheckRequestHandler, AppCheckHttpClient;
 export 'src/app_check/app_check_api.dart';
diff --git a/packages/dart_firebase_admin/lib/auth.dart b/packages/dart_firebase_admin/lib/auth.dart
index cde0930e..dc4b619c 100644
--- a/packages/dart_firebase_admin/lib/auth.dart
+++ b/packages/dart_firebase_admin/lib/auth.dart
@@ -1 +1,15 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 export 'src/auth.dart' hide AuthRequestHandler, AuthHttpClient;
diff --git a/packages/dart_firebase_admin/lib/dart_firebase_admin.dart b/packages/dart_firebase_admin/lib/dart_firebase_admin.dart
index fe7bfa47..ff71a0a1 100644
--- a/packages/dart_firebase_admin/lib/dart_firebase_admin.dart
+++ b/packages/dart_firebase_admin/lib/dart_firebase_admin.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 export 'src/app.dart'
     hide
         envSymbol,
diff --git a/packages/dart_firebase_admin/lib/firestore.dart b/packages/dart_firebase_admin/lib/firestore.dart
index fb1455ae..81253a2a 100644
--- a/packages/dart_firebase_admin/lib/firestore.dart
+++ b/packages/dart_firebase_admin/lib/firestore.dart
@@ -1 +1,15 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 export 'src/firestore/firestore.dart';
diff --git a/packages/dart_firebase_admin/lib/functions.dart b/packages/dart_firebase_admin/lib/functions.dart
index ff072ec6..da1a6210 100644
--- a/packages/dart_firebase_admin/lib/functions.dart
+++ b/packages/dart_firebase_admin/lib/functions.dart
@@ -1 +1,15 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 export 'src/functions/functions.dart';
diff --git a/packages/dart_firebase_admin/lib/messaging.dart b/packages/dart_firebase_admin/lib/messaging.dart
index b4284baa..033b78e4 100644
--- a/packages/dart_firebase_admin/lib/messaging.dart
+++ b/packages/dart_firebase_admin/lib/messaging.dart
@@ -1,2 +1,16 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 export 'src/messaging/messaging.dart'
     hide FirebaseMessagingRequestHandler, FirebaseMessagingHttpClient;
diff --git a/packages/dart_firebase_admin/lib/security_rules.dart b/packages/dart_firebase_admin/lib/security_rules.dart
index 3ba780b8..79911c77 100644
--- a/packages/dart_firebase_admin/lib/security_rules.dart
+++ b/packages/dart_firebase_admin/lib/security_rules.dart
@@ -1,2 +1,16 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 export 'src/security_rules/security_rules.dart'
     hide SecurityRulesRequestHandler, SecurityRulesHttpClient;
diff --git a/packages/dart_firebase_admin/lib/src/app.dart b/packages/dart_firebase_admin/lib/src/app.dart
index 83e63fc5..6b6d2964 100644
--- a/packages/dart_firebase_admin/lib/src/app.dart
+++ b/packages/dart_firebase_admin/lib/src/app.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 library app;
 
 import 'dart:async';
diff --git a/packages/dart_firebase_admin/lib/src/app/app_exception.dart b/packages/dart_firebase_admin/lib/src/app/app_exception.dart
index 57634aa2..ee041fbd 100644
--- a/packages/dart_firebase_admin/lib/src/app/app_exception.dart
+++ b/packages/dart_firebase_admin/lib/src/app/app_exception.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../app.dart';
 
 /// Exception thrown for Firebase app initialization and lifecycle errors.
diff --git a/packages/dart_firebase_admin/lib/src/app/app_options.dart b/packages/dart_firebase_admin/lib/src/app/app_options.dart
index c3e19bd7..f436fe0a 100644
--- a/packages/dart_firebase_admin/lib/src/app/app_options.dart
+++ b/packages/dart_firebase_admin/lib/src/app/app_options.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../app.dart';
 
 /// Configuration options for initializing a Firebase app.
diff --git a/packages/dart_firebase_admin/lib/src/app/app_registry.dart b/packages/dart_firebase_admin/lib/src/app/app_registry.dart
index 3db9cd43..13c331e7 100644
--- a/packages/dart_firebase_admin/lib/src/app/app_registry.dart
+++ b/packages/dart_firebase_admin/lib/src/app/app_registry.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../app.dart';
 
 @internal
diff --git a/packages/dart_firebase_admin/lib/src/app/credential.dart b/packages/dart_firebase_admin/lib/src/app/credential.dart
index 202db812..53ba5d3d 100644
--- a/packages/dart_firebase_admin/lib/src/app/credential.dart
+++ b/packages/dart_firebase_admin/lib/src/app/credential.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../app.dart';
 
 @internal
diff --git a/packages/dart_firebase_admin/lib/src/app/emulator_client.dart b/packages/dart_firebase_admin/lib/src/app/emulator_client.dart
index ddf9ff21..fd9d01e6 100644
--- a/packages/dart_firebase_admin/lib/src/app/emulator_client.dart
+++ b/packages/dart_firebase_admin/lib/src/app/emulator_client.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../app.dart';
 
 /// Internal HTTP request implementation that wraps a stream.
diff --git a/packages/dart_firebase_admin/lib/src/app/environment.dart b/packages/dart_firebase_admin/lib/src/app/environment.dart
index 3af900ab..ccdbbfa2 100644
--- a/packages/dart_firebase_admin/lib/src/app/environment.dart
+++ b/packages/dart_firebase_admin/lib/src/app/environment.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../app.dart';
 
 /// Environment variable names used by the Firebase Admin SDK.
diff --git a/packages/dart_firebase_admin/lib/src/app/exception.dart b/packages/dart_firebase_admin/lib/src/app/exception.dart
index 282bbf75..5b938ecb 100644
--- a/packages/dart_firebase_admin/lib/src/app/exception.dart
+++ b/packages/dart_firebase_admin/lib/src/app/exception.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../app.dart';
 
 /// Composite type which includes both a `FirebaseError` object and an index
diff --git a/packages/dart_firebase_admin/lib/src/app/firebase_app.dart b/packages/dart_firebase_admin/lib/src/app/firebase_app.dart
index 6338c428..256cce20 100644
--- a/packages/dart_firebase_admin/lib/src/app/firebase_app.dart
+++ b/packages/dart_firebase_admin/lib/src/app/firebase_app.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../app.dart';
 
 /// Represents a Firebase app instance.
diff --git a/packages/dart_firebase_admin/lib/src/app/firebase_service.dart b/packages/dart_firebase_admin/lib/src/app/firebase_service.dart
index 3b13d924..06b2cbd7 100644
--- a/packages/dart_firebase_admin/lib/src/app/firebase_service.dart
+++ b/packages/dart_firebase_admin/lib/src/app/firebase_service.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../app.dart';
 
 @internal
diff --git a/packages/dart_firebase_admin/lib/src/app/firebase_user_agent_client.dart b/packages/dart_firebase_admin/lib/src/app/firebase_user_agent_client.dart
index 45c9e47a..3640a0b4 100644
--- a/packages/dart_firebase_admin/lib/src/app/firebase_user_agent_client.dart
+++ b/packages/dart_firebase_admin/lib/src/app/firebase_user_agent_client.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../app.dart';
 
 /// HTTP client wrapper that adds Firebase and Google API client headers for usage tracking.
diff --git a/packages/dart_firebase_admin/lib/src/app_check/app_check.dart b/packages/dart_firebase_admin/lib/src/app_check/app_check.dart
index 904c2cbd..94f3ed90 100644
--- a/packages/dart_firebase_admin/lib/src/app_check/app_check.dart
+++ b/packages/dart_firebase_admin/lib/src/app_check/app_check.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:googleapis/firebaseappcheck/v1.dart' as appcheck1;
diff --git a/packages/dart_firebase_admin/lib/src/app_check/app_check_api.dart b/packages/dart_firebase_admin/lib/src/app_check/app_check_api.dart
index 9aa5ece0..49029481 100644
--- a/packages/dart_firebase_admin/lib/src/app_check/app_check_api.dart
+++ b/packages/dart_firebase_admin/lib/src/app_check/app_check_api.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:meta/meta.dart';
 
 import 'app_check.dart';
diff --git a/packages/dart_firebase_admin/lib/src/app_check/app_check_exception.dart b/packages/dart_firebase_admin/lib/src/app_check/app_check_exception.dart
index 04cfb268..db4477ff 100644
--- a/packages/dart_firebase_admin/lib/src/app_check/app_check_exception.dart
+++ b/packages/dart_firebase_admin/lib/src/app_check/app_check_exception.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'app_check.dart';
 
 final appCheckErrorCodeMapping = <String, AppCheckErrorCode>{
diff --git a/packages/dart_firebase_admin/lib/src/app_check/app_check_http_client.dart b/packages/dart_firebase_admin/lib/src/app_check/app_check_http_client.dart
index cfe4af1a..fae2fa37 100644
--- a/packages/dart_firebase_admin/lib/src/app_check/app_check_http_client.dart
+++ b/packages/dart_firebase_admin/lib/src/app_check/app_check_http_client.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'app_check.dart';
 
 /// HTTP client for Firebase App Check API operations.
diff --git a/packages/dart_firebase_admin/lib/src/app_check/app_check_request_handler.dart b/packages/dart_firebase_admin/lib/src/app_check/app_check_request_handler.dart
index 695b816c..17eb4e7a 100644
--- a/packages/dart_firebase_admin/lib/src/app_check/app_check_request_handler.dart
+++ b/packages/dart_firebase_admin/lib/src/app_check/app_check_request_handler.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'app_check.dart';
 
 /// Request handler for Firebase App Check API operations.
diff --git a/packages/dart_firebase_admin/lib/src/app_check/token_generator.dart b/packages/dart_firebase_admin/lib/src/app_check/token_generator.dart
index dcb2906d..bf543f93 100644
--- a/packages/dart_firebase_admin/lib/src/app_check/token_generator.dart
+++ b/packages/dart_firebase_admin/lib/src/app_check/token_generator.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:convert';
 
 import 'package:googleapis_auth/auth_io.dart' as googleapis_auth;
diff --git a/packages/dart_firebase_admin/lib/src/app_check/token_verifier.dart b/packages/dart_firebase_admin/lib/src/app_check/token_verifier.dart
index 934510ce..e6bb5c3f 100644
--- a/packages/dart_firebase_admin/lib/src/app_check/token_verifier.dart
+++ b/packages/dart_firebase_admin/lib/src/app_check/token_verifier.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:meta/meta.dart';
diff --git a/packages/dart_firebase_admin/lib/src/auth.dart b/packages/dart_firebase_admin/lib/src/auth.dart
index 5b25abcb..e4121a78 100644
--- a/packages/dart_firebase_admin/lib/src/auth.dart
+++ b/packages/dart_firebase_admin/lib/src/auth.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:convert';
 import 'dart:typed_data';
diff --git a/packages/dart_firebase_admin/lib/src/auth/action_code_settings_builder.dart b/packages/dart_firebase_admin/lib/src/auth/action_code_settings_builder.dart
index 93c798bb..722ecdb9 100644
--- a/packages/dart_firebase_admin/lib/src/auth/action_code_settings_builder.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/action_code_settings_builder.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 class ActionCodeSettingsIos {
diff --git a/packages/dart_firebase_admin/lib/src/auth/auth.dart b/packages/dart_firebase_admin/lib/src/auth/auth.dart
index 5bf04800..8b453d60 100644
--- a/packages/dart_firebase_admin/lib/src/auth/auth.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/auth.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 /// Auth service bound to the provided app.
diff --git a/packages/dart_firebase_admin/lib/src/auth/auth_config.dart b/packages/dart_firebase_admin/lib/src/auth/auth_config.dart
index adcf37d0..c7acd5f5 100644
--- a/packages/dart_firebase_admin/lib/src/auth/auth_config.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/auth_config.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 /// The possible types for [AuthProviderConfigFilter._type].
diff --git a/packages/dart_firebase_admin/lib/src/auth/auth_config_tenant.dart b/packages/dart_firebase_admin/lib/src/auth/auth_config_tenant.dart
index 7f6742c1..463b6b54 100644
--- a/packages/dart_firebase_admin/lib/src/auth/auth_config_tenant.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/auth_config_tenant.dart
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/packages/dart_firebase_admin/lib/src/auth/auth_exception.dart b/packages/dart_firebase_admin/lib/src/auth/auth_exception.dart
index a7cfecf3..a45cb901 100644
--- a/packages/dart_firebase_admin/lib/src/auth/auth_exception.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/auth_exception.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 class FirebaseAuthAdminException extends FirebaseAdminException
diff --git a/packages/dart_firebase_admin/lib/src/auth/auth_http_client.dart b/packages/dart_firebase_admin/lib/src/auth/auth_http_client.dart
index 67988fbe..7cb51bff 100644
--- a/packages/dart_firebase_admin/lib/src/auth/auth_http_client.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/auth_http_client.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 class AuthHttpClient {
diff --git a/packages/dart_firebase_admin/lib/src/auth/auth_request_handler.dart b/packages/dart_firebase_admin/lib/src/auth/auth_request_handler.dart
index 951b2aac..b710ac01 100644
--- a/packages/dart_firebase_admin/lib/src/auth/auth_request_handler.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/auth_request_handler.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 /// Maximum allowed number of provider configurations to batch download at one time.
diff --git a/packages/dart_firebase_admin/lib/src/auth/base_auth.dart b/packages/dart_firebase_admin/lib/src/auth/base_auth.dart
index 676c8cec..8dc2feaf 100644
--- a/packages/dart_firebase_admin/lib/src/auth/base_auth.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/base_auth.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 _FirebaseTokenGenerator _createFirebaseTokenGenerator(
diff --git a/packages/dart_firebase_admin/lib/src/auth/identifier.dart b/packages/dart_firebase_admin/lib/src/auth/identifier.dart
index cbfe90bb..9193864b 100644
--- a/packages/dart_firebase_admin/lib/src/auth/identifier.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/identifier.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 /// Identifies a user to be looked up.
diff --git a/packages/dart_firebase_admin/lib/src/auth/project_config.dart b/packages/dart_firebase_admin/lib/src/auth/project_config.dart
index cc1a1979..83da1a99 100644
--- a/packages/dart_firebase_admin/lib/src/auth/project_config.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/project_config.dart
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/packages/dart_firebase_admin/lib/src/auth/project_config_manager.dart b/packages/dart_firebase_admin/lib/src/auth/project_config_manager.dart
index 24b61a21..2f7b4d18 100644
--- a/packages/dart_firebase_admin/lib/src/auth/project_config_manager.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/project_config_manager.dart
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/packages/dart_firebase_admin/lib/src/auth/tenant.dart b/packages/dart_firebase_admin/lib/src/auth/tenant.dart
index caeb91d8..65157ed7 100644
--- a/packages/dart_firebase_admin/lib/src/auth/tenant.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/tenant.dart
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/packages/dart_firebase_admin/lib/src/auth/tenant_manager.dart b/packages/dart_firebase_admin/lib/src/auth/tenant_manager.dart
index f35694b0..dde93df1 100644
--- a/packages/dart_firebase_admin/lib/src/auth/tenant_manager.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/tenant_manager.dart
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/packages/dart_firebase_admin/lib/src/auth/token_generator.dart b/packages/dart_firebase_admin/lib/src/auth/token_generator.dart
index 620a8699..9d6a87a0 100644
--- a/packages/dart_firebase_admin/lib/src/auth/token_generator.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/token_generator.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 const _oneHourInSeconds = 60 * 60;
diff --git a/packages/dart_firebase_admin/lib/src/auth/token_verifier.dart b/packages/dart_firebase_admin/lib/src/auth/token_verifier.dart
index 39986c3a..9c2f4c32 100644
--- a/packages/dart_firebase_admin/lib/src/auth/token_verifier.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/token_verifier.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 const _algorithmRS256 = 'RS256';
diff --git a/packages/dart_firebase_admin/lib/src/auth/user.dart b/packages/dart_firebase_admin/lib/src/auth/user.dart
index f8655619..255fdb0d 100644
--- a/packages/dart_firebase_admin/lib/src/auth/user.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/user.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 /// 'REDACTED', encoded as a base64 string.
diff --git a/packages/dart_firebase_admin/lib/src/auth/user_import_builder.dart b/packages/dart_firebase_admin/lib/src/auth/user_import_builder.dart
index 1c848352..7eea2e76 100644
--- a/packages/dart_firebase_admin/lib/src/auth/user_import_builder.dart
+++ b/packages/dart_firebase_admin/lib/src/auth/user_import_builder.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../auth.dart';
 
 enum HashAlgorithmType {
diff --git a/packages/dart_firebase_admin/lib/src/firestore/firestore.dart b/packages/dart_firebase_admin/lib/src/firestore/firestore.dart
index 7022df3b..e28d80a6 100644
--- a/packages/dart_firebase_admin/lib/src/firestore/firestore.dart
+++ b/packages/dart_firebase_admin/lib/src/firestore/firestore.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:google_cloud_firestore/google_cloud_firestore.dart'
diff --git a/packages/dart_firebase_admin/lib/src/functions/functions.dart b/packages/dart_firebase_admin/lib/src/functions/functions.dart
index 0e0c6f40..a551a1b4 100644
--- a/packages/dart_firebase_admin/lib/src/functions/functions.dart
+++ b/packages/dart_firebase_admin/lib/src/functions/functions.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:convert';
 import 'package:googleapis/cloudtasks/v2.dart' as tasks2;
diff --git a/packages/dart_firebase_admin/lib/src/functions/functions_api.dart b/packages/dart_firebase_admin/lib/src/functions/functions_api.dart
index c3257cfb..51373ec1 100644
--- a/packages/dart_firebase_admin/lib/src/functions/functions_api.dart
+++ b/packages/dart_firebase_admin/lib/src/functions/functions_api.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'functions.dart';
 
 /// Represents delivery scheduling options for a task.
diff --git a/packages/dart_firebase_admin/lib/src/functions/functions_exception.dart b/packages/dart_firebase_admin/lib/src/functions/functions_exception.dart
index 28aacc68..b43eccd9 100644
--- a/packages/dart_firebase_admin/lib/src/functions/functions_exception.dart
+++ b/packages/dart_firebase_admin/lib/src/functions/functions_exception.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'functions.dart';
 
 /// Functions server to client enum error codes.
diff --git a/packages/dart_firebase_admin/lib/src/functions/functions_http_client.dart b/packages/dart_firebase_admin/lib/src/functions/functions_http_client.dart
index 2bf5960a..4697bc66 100644
--- a/packages/dart_firebase_admin/lib/src/functions/functions_http_client.dart
+++ b/packages/dart_firebase_admin/lib/src/functions/functions_http_client.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'functions.dart';
 
 /// HTTP client for Cloud Functions Task Queue operations.
diff --git a/packages/dart_firebase_admin/lib/src/functions/functions_request_handler.dart b/packages/dart_firebase_admin/lib/src/functions/functions_request_handler.dart
index d5e669a7..abf187d5 100644
--- a/packages/dart_firebase_admin/lib/src/functions/functions_request_handler.dart
+++ b/packages/dart_firebase_admin/lib/src/functions/functions_request_handler.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'functions.dart';
 
 /// Parsed resource name components.
diff --git a/packages/dart_firebase_admin/lib/src/functions/task_queue.dart b/packages/dart_firebase_admin/lib/src/functions/task_queue.dart
index 42fc3c1e..c51e05e6 100644
--- a/packages/dart_firebase_admin/lib/src/functions/task_queue.dart
+++ b/packages/dart_firebase_admin/lib/src/functions/task_queue.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'functions.dart';
 
 /// A reference to a Cloud Functions task queue.
diff --git a/packages/dart_firebase_admin/lib/src/messaging/fmc_exception.dart b/packages/dart_firebase_admin/lib/src/messaging/fmc_exception.dart
index 6a96cc56..e4db8419 100644
--- a/packages/dart_firebase_admin/lib/src/messaging/fmc_exception.dart
+++ b/packages/dart_firebase_admin/lib/src/messaging/fmc_exception.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'messaging.dart';
 
 /// Messaging server to client enum error codes.
diff --git a/packages/dart_firebase_admin/lib/src/messaging/messaging.dart b/packages/dart_firebase_admin/lib/src/messaging/messaging.dart
index ebccdcb0..25813eff 100644
--- a/packages/dart_firebase_admin/lib/src/messaging/messaging.dart
+++ b/packages/dart_firebase_admin/lib/src/messaging/messaging.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:convert';
 
diff --git a/packages/dart_firebase_admin/lib/src/messaging/messaging_api.dart b/packages/dart_firebase_admin/lib/src/messaging/messaging_api.dart
index e409400e..6ff76823 100644
--- a/packages/dart_firebase_admin/lib/src/messaging/messaging_api.dart
+++ b/packages/dart_firebase_admin/lib/src/messaging/messaging_api.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'messaging.dart';
 
 abstract class _BaseMessage {
diff --git a/packages/dart_firebase_admin/lib/src/messaging/messaging_http_client.dart b/packages/dart_firebase_admin/lib/src/messaging/messaging_http_client.dart
index 0ce7d45d..1f0c3a45 100644
--- a/packages/dart_firebase_admin/lib/src/messaging/messaging_http_client.dart
+++ b/packages/dart_firebase_admin/lib/src/messaging/messaging_http_client.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'messaging.dart';
 
 /// HTTP client for Firebase Cloud Messaging API operations.
diff --git a/packages/dart_firebase_admin/lib/src/messaging/messaging_request_handler.dart b/packages/dart_firebase_admin/lib/src/messaging/messaging_request_handler.dart
index e721237e..238b07fa 100644
--- a/packages/dart_firebase_admin/lib/src/messaging/messaging_request_handler.dart
+++ b/packages/dart_firebase_admin/lib/src/messaging/messaging_request_handler.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'messaging.dart';
 
 /// Request handler for Firebase Cloud Messaging API operations.
diff --git a/packages/dart_firebase_admin/lib/src/object_utils.dart b/packages/dart_firebase_admin/lib/src/object_utils.dart
index 7fcdbaa0..2b616020 100644
--- a/packages/dart_firebase_admin/lib/src/object_utils.dart
+++ b/packages/dart_firebase_admin/lib/src/object_utils.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 extension ObjectUtils<T> on T? {
   T orThrow(Never Function() thrower) => this ?? thrower();
 
diff --git a/packages/dart_firebase_admin/lib/src/security_rules/security_rules.dart b/packages/dart_firebase_admin/lib/src/security_rules/security_rules.dart
index fc0d7cd0..5f655968 100644
--- a/packages/dart_firebase_admin/lib/src/security_rules/security_rules.dart
+++ b/packages/dart_firebase_admin/lib/src/security_rules/security_rules.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:googleapis/firebaserules/v1.dart' as firebase_rules_v1;
diff --git a/packages/dart_firebase_admin/lib/src/security_rules/security_rules_exception.dart b/packages/dart_firebase_admin/lib/src/security_rules/security_rules_exception.dart
index a72f808d..882b6e04 100644
--- a/packages/dart_firebase_admin/lib/src/security_rules/security_rules_exception.dart
+++ b/packages/dart_firebase_admin/lib/src/security_rules/security_rules_exception.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'security_rules.dart';
 
 enum FirebaseSecurityRulesErrorCode {
diff --git a/packages/dart_firebase_admin/lib/src/security_rules/security_rules_http_client.dart b/packages/dart_firebase_admin/lib/src/security_rules/security_rules_http_client.dart
index e348bca0..bdf42ea3 100644
--- a/packages/dart_firebase_admin/lib/src/security_rules/security_rules_http_client.dart
+++ b/packages/dart_firebase_admin/lib/src/security_rules/security_rules_http_client.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'security_rules.dart';
 
 /// HTTP client for Firebase Security Rules API operations.
diff --git a/packages/dart_firebase_admin/lib/src/security_rules/security_rules_request_handler.dart b/packages/dart_firebase_admin/lib/src/security_rules/security_rules_request_handler.dart
index 8a180319..4fd0a644 100644
--- a/packages/dart_firebase_admin/lib/src/security_rules/security_rules_request_handler.dart
+++ b/packages/dart_firebase_admin/lib/src/security_rules/security_rules_request_handler.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'security_rules.dart';
 
 class Release {
diff --git a/packages/dart_firebase_admin/lib/src/storage/storage.dart b/packages/dart_firebase_admin/lib/src/storage/storage.dart
index e558eca0..55d2cdb6 100644
--- a/packages/dart_firebase_admin/lib/src/storage/storage.dart
+++ b/packages/dart_firebase_admin/lib/src/storage/storage.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:convert';
 
 import 'package:google_cloud_storage/google_cloud_storage.dart' as gcs;
diff --git a/packages/dart_firebase_admin/lib/src/storage/storage_exception.dart b/packages/dart_firebase_admin/lib/src/storage/storage_exception.dart
index 9f271b05..5b457c03 100644
--- a/packages/dart_firebase_admin/lib/src/storage/storage_exception.dart
+++ b/packages/dart_firebase_admin/lib/src/storage/storage_exception.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'storage.dart';
 
 class FirebaseStorageAdminException extends FirebaseAdminException
diff --git a/packages/dart_firebase_admin/lib/src/utils/app_extension.dart b/packages/dart_firebase_admin/lib/src/utils/app_extension.dart
index 577aef97..fc6fd284 100644
--- a/packages/dart_firebase_admin/lib/src/utils/app_extension.dart
+++ b/packages/dart_firebase_admin/lib/src/utils/app_extension.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:googleapis_auth/auth_io.dart';
 
 import '../app.dart';
diff --git a/packages/dart_firebase_admin/lib/src/utils/error.dart b/packages/dart_firebase_admin/lib/src/utils/error.dart
index 7d3cd1e0..cdd4447a 100644
--- a/packages/dart_firebase_admin/lib/src/utils/error.dart
+++ b/packages/dart_firebase_admin/lib/src/utils/error.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 class ErrorInfo {
   ErrorInfo({required this.code, required this.message});
 
diff --git a/packages/dart_firebase_admin/lib/src/utils/index.dart b/packages/dart_firebase_admin/lib/src/utils/index.dart
index e29f4dba..43d8d230 100644
--- a/packages/dart_firebase_admin/lib/src/utils/index.dart
+++ b/packages/dart_firebase_admin/lib/src/utils/index.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 class ParsedResource {
   ParsedResource({this.projectId, this.locationId, required this.resourceId});
 
diff --git a/packages/dart_firebase_admin/lib/src/utils/jwt.dart b/packages/dart_firebase_admin/lib/src/utils/jwt.dart
index cbc3d53c..1109c596 100644
--- a/packages/dart_firebase_admin/lib/src/utils/jwt.dart
+++ b/packages/dart_firebase_admin/lib/src/utils/jwt.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:convert';
 
 import 'package:dart_jsonwebtoken/dart_jsonwebtoken.dart';
diff --git a/packages/dart_firebase_admin/lib/src/utils/native_environment.dart b/packages/dart_firebase_admin/lib/src/utils/native_environment.dart
index 2e123298..a53a20b4 100644
--- a/packages/dart_firebase_admin/lib/src/utils/native_environment.dart
+++ b/packages/dart_firebase_admin/lib/src/utils/native_environment.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:ffi';
 import 'dart:io';
 
diff --git a/packages/dart_firebase_admin/lib/src/utils/utils.dart b/packages/dart_firebase_admin/lib/src/utils/utils.dart
index ca9d37ec..9c3e881e 100644
--- a/packages/dart_firebase_admin/lib/src/utils/utils.dart
+++ b/packages/dart_firebase_admin/lib/src/utils/utils.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:io';
 
 /// The current Dart SDK version in semver format (e.g. "3.3.0").
diff --git a/packages/dart_firebase_admin/lib/src/utils/validator.dart b/packages/dart_firebase_admin/lib/src/utils/validator.dart
index 8a1f7e89..424cf281 100644
--- a/packages/dart_firebase_admin/lib/src/utils/validator.dart
+++ b/packages/dart_firebase_admin/lib/src/utils/validator.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:meta/meta.dart';
 
 import '../auth.dart';
diff --git a/packages/dart_firebase_admin/lib/storage.dart b/packages/dart_firebase_admin/lib/storage.dart
index 68d5d9d2..3336594d 100644
--- a/packages/dart_firebase_admin/lib/storage.dart
+++ b/packages/dart_firebase_admin/lib/storage.dart
@@ -1 +1,15 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 export 'src/storage/storage.dart';
diff --git a/packages/dart_firebase_admin/lib/version.g.dart b/packages/dart_firebase_admin/lib/version.g.dart
index 59c5d2ac..818e4e9b 100644
--- a/packages/dart_firebase_admin/lib/version.g.dart
+++ b/packages/dart_firebase_admin/lib/version.g.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // GENERATED CODE - DO NOT MODIFY BY HAND
 // This file is generated by gen-version.sh
 
diff --git a/packages/dart_firebase_admin/pubspec.yaml b/packages/dart_firebase_admin/pubspec.yaml
index fed17bbf..951d7362 100644
--- a/packages/dart_firebase_admin/pubspec.yaml
+++ b/packages/dart_firebase_admin/pubspec.yaml
@@ -17,9 +17,7 @@ dependencies:
   ffi: ^2.1.2
   google_cloud: ^0.3.0
   google_cloud_firestore: ^0.1.0
-  # `google_cloud_storage` will not change the surface used by
-  # `dart_firebase_admin`.
-  google_cloud_storage: ">=0.5.1"
+  google_cloud_storage: ^0.5.1
   googleapis: ^15.0.0
   googleapis_auth: ^2.2.0
   googleapis_beta: ^9.0.0
@@ -41,4 +39,4 @@ dev_dependencies:
 false_secrets:
  - /test/auth/jwt_test.dart
  - /test/client/get_id_token.js
- - /test/mock_service_account.dart
\ No newline at end of file
+ - /test/mock_service_account.dart
diff --git a/packages/dart_firebase_admin/test/app/app_registry_test.dart b/packages/dart_firebase_admin/test/app/app_registry_test.dart
index 04914e36..98a77e16 100644
--- a/packages/dart_firebase_admin/test/app/app_registry_test.dart
+++ b/packages/dart_firebase_admin/test/app/app_registry_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
diff --git a/packages/dart_firebase_admin/test/app/exception_test.dart b/packages/dart_firebase_admin/test/app/exception_test.dart
index 345cc793..9720b7f8 100644
--- a/packages/dart_firebase_admin/test/app/exception_test.dart
+++ b/packages/dart_firebase_admin/test/app/exception_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:convert';
 
 import 'package:dart_firebase_admin/src/app.dart';
diff --git a/packages/dart_firebase_admin/test/app/firebase_app_integration_test.dart b/packages/dart_firebase_admin/test/app/firebase_app_integration_test.dart
index 2e34bc7a..1f6463ef 100644
--- a/packages/dart_firebase_admin/test/app/firebase_app_integration_test.dart
+++ b/packages/dart_firebase_admin/test/app/firebase_app_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:io';
 
diff --git a/packages/dart_firebase_admin/test/app/firebase_app_prod_test.dart b/packages/dart_firebase_admin/test/app/firebase_app_prod_test.dart
index 3353bdbc..9179fb6d 100644
--- a/packages/dart_firebase_admin/test/app/firebase_app_prod_test.dart
+++ b/packages/dart_firebase_admin/test/app/firebase_app_prod_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:io';
 
diff --git a/packages/dart_firebase_admin/test/app/firebase_app_test.dart b/packages/dart_firebase_admin/test/app/firebase_app_test.dart
index 1b364a42..a07ba3a8 100644
--- a/packages/dart_firebase_admin/test/app/firebase_app_test.dart
+++ b/packages/dart_firebase_admin/test/app/firebase_app_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:dart_firebase_admin/functions.dart';
diff --git a/packages/dart_firebase_admin/test/app/firebase_user_agent_client_test.dart b/packages/dart_firebase_admin/test/app/firebase_user_agent_client_test.dart
index 4f1ae441..23dcdda3 100644
--- a/packages/dart_firebase_admin/test/app/firebase_user_agent_client_test.dart
+++ b/packages/dart_firebase_admin/test/app/firebase_user_agent_client_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:dart_firebase_admin/src/app.dart';
diff --git a/packages/dart_firebase_admin/test/app_check/app_check_exception_test.dart b/packages/dart_firebase_admin/test/app_check/app_check_exception_test.dart
index 3f9f5571..e3ff47c1 100644
--- a/packages/dart_firebase_admin/test/app_check/app_check_exception_test.dart
+++ b/packages/dart_firebase_admin/test/app_check/app_check_exception_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/app_check.dart';
 import 'package:dart_firebase_admin/src/utils/jwt.dart';
 import 'package:test/test.dart';
diff --git a/packages/dart_firebase_admin/test/app_check/app_check_test.dart b/packages/dart_firebase_admin/test/app_check/app_check_test.dart
index c4bb3ccf..62ab251f 100644
--- a/packages/dart_firebase_admin/test/app_check/app_check_test.dart
+++ b/packages/dart_firebase_admin/test/app_check/app_check_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'package:dart_firebase_admin/app_check.dart';
 import 'package:dart_firebase_admin/src/app.dart';
diff --git a/packages/dart_firebase_admin/test/app_check/token_verifier_test.dart b/packages/dart_firebase_admin/test/app_check/token_verifier_test.dart
index cb309ac1..50977315 100644
--- a/packages/dart_firebase_admin/test/app_check/token_verifier_test.dart
+++ b/packages/dart_firebase_admin/test/app_check/token_verifier_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/app_check.dart';
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 import 'package:dart_firebase_admin/src/app_check/token_verifier.dart';
diff --git a/packages/dart_firebase_admin/test/auth/auth_config_tenant_test.dart b/packages/dart_firebase_admin/test/auth/auth_config_tenant_test.dart
index 35297b5a..323cce25 100644
--- a/packages/dart_firebase_admin/test/auth/auth_config_tenant_test.dart
+++ b/packages/dart_firebase_admin/test/auth/auth_config_tenant_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/src/auth.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/dart_firebase_admin/test/auth/auth_exception_test.dart b/packages/dart_firebase_admin/test/auth/auth_exception_test.dart
index 74e34ed0..f77de7d9 100644
--- a/packages/dart_firebase_admin/test/auth/auth_exception_test.dart
+++ b/packages/dart_firebase_admin/test/auth/auth_exception_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/auth.dart';
 import 'package:dart_firebase_admin/src/app.dart';
 import 'package:test/test.dart';
diff --git a/packages/dart_firebase_admin/test/auth/auth_integration_prod_test.dart b/packages/dart_firebase_admin/test/auth/auth_integration_prod_test.dart
index 20aae3a3..8477d3d0 100644
--- a/packages/dart_firebase_admin/test/auth/auth_integration_prod_test.dart
+++ b/packages/dart_firebase_admin/test/auth/auth_integration_prod_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // Firebase Auth Integration Tests - Production Only
 //
 // These tests require production Firebase (GOOGLE_APPLICATION_CREDENTIALS)
diff --git a/packages/dart_firebase_admin/test/auth/auth_test.dart b/packages/dart_firebase_admin/test/auth/auth_test.dart
index 2ab5963b..93937ba8 100644
--- a/packages/dart_firebase_admin/test/auth/auth_test.dart
+++ b/packages/dart_firebase_admin/test/auth/auth_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
diff --git a/packages/dart_firebase_admin/test/auth/integration_test.dart b/packages/dart_firebase_admin/test/auth/integration_test.dart
index 964ff0e9..517428b6 100644
--- a/packages/dart_firebase_admin/test/auth/integration_test.dart
+++ b/packages/dart_firebase_admin/test/auth/integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // Firebase Auth Integration Tests
 //
 // SAFETY: These tests require Firebase Auth Emulator by default to prevent
diff --git a/packages/dart_firebase_admin/test/auth/jwt_test.dart b/packages/dart_firebase_admin/test/auth/jwt_test.dart
index 2e46f2f1..0009f159 100644
--- a/packages/dart_firebase_admin/test/auth/jwt_test.dart
+++ b/packages/dart_firebase_admin/test/auth/jwt_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/src/utils/jwt.dart';
 import 'package:dart_jsonwebtoken/dart_jsonwebtoken.dart';
 import 'package:jose/jose.dart';
diff --git a/packages/dart_firebase_admin/test/auth/project_config_integration_prod_test.dart b/packages/dart_firebase_admin/test/auth/project_config_integration_prod_test.dart
index 9a19d3bd..d72136c3 100644
--- a/packages/dart_firebase_admin/test/auth/project_config_integration_prod_test.dart
+++ b/packages/dart_firebase_admin/test/auth/project_config_integration_prod_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // Firebase ProjectConfig Integration Tests - Production Only
 //
 // These tests require production Firebase (GOOGLE_APPLICATION_CREDENTIALS)
diff --git a/packages/dart_firebase_admin/test/auth/project_config_integration_test.dart b/packages/dart_firebase_admin/test/auth/project_config_integration_test.dart
index f92be7a6..0bdfa296 100644
--- a/packages/dart_firebase_admin/test/auth/project_config_integration_test.dart
+++ b/packages/dart_firebase_admin/test/auth/project_config_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // Firebase ProjectConfig Integration Tests - Emulator Safe
 //
 // These tests work with Firebase Auth Emulator and test basic ProjectConfig operations.
diff --git a/packages/dart_firebase_admin/test/auth/project_config_manager_test.dart b/packages/dart_firebase_admin/test/auth/project_config_manager_test.dart
index 98605f9a..c37949e0 100644
--- a/packages/dart_firebase_admin/test/auth/project_config_manager_test.dart
+++ b/packages/dart_firebase_admin/test/auth/project_config_manager_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/auth.dart';
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 import 'package:test/test.dart';
diff --git a/packages/dart_firebase_admin/test/auth/project_config_test.dart b/packages/dart_firebase_admin/test/auth/project_config_test.dart
index bf6564c4..cde360e3 100644
--- a/packages/dart_firebase_admin/test/auth/project_config_test.dart
+++ b/packages/dart_firebase_admin/test/auth/project_config_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/auth.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/dart_firebase_admin/test/auth/tenant_integration_prod_test.dart b/packages/dart_firebase_admin/test/auth/tenant_integration_prod_test.dart
index 9795b289..5e5538a1 100644
--- a/packages/dart_firebase_admin/test/auth/tenant_integration_prod_test.dart
+++ b/packages/dart_firebase_admin/test/auth/tenant_integration_prod_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // Firebase Tenant Integration Tests - Production Only
 //
 // These tests require production Firebase (GOOGLE_APPLICATION_CREDENTIALS)
diff --git a/packages/dart_firebase_admin/test/auth/tenant_integration_test.dart b/packages/dart_firebase_admin/test/auth/tenant_integration_test.dart
index 4091039b..6e60f74e 100644
--- a/packages/dart_firebase_admin/test/auth/tenant_integration_test.dart
+++ b/packages/dart_firebase_admin/test/auth/tenant_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // Firebase Tenant Integration Tests - Emulator Safe
 //
 // These tests work with Firebase Auth Emulator and test basic Tenant operations.
diff --git a/packages/dart_firebase_admin/test/auth/tenant_manager_test.dart b/packages/dart_firebase_admin/test/auth/tenant_manager_test.dart
index da4cce3d..8bc45faa 100644
--- a/packages/dart_firebase_admin/test/auth/tenant_manager_test.dart
+++ b/packages/dart_firebase_admin/test/auth/tenant_manager_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:convert';
 
 import 'package:dart_firebase_admin/auth.dart';
diff --git a/packages/dart_firebase_admin/test/auth/tenant_test.dart b/packages/dart_firebase_admin/test/auth/tenant_test.dart
index 37ff96eb..a6744161 100644
--- a/packages/dart_firebase_admin/test/auth/tenant_test.dart
+++ b/packages/dart_firebase_admin/test/auth/tenant_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/auth.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/dart_firebase_admin/test/auth/token_verifier_test.dart b/packages/dart_firebase_admin/test/auth/token_verifier_test.dart
index 5b67f8ca..ebcb06e2 100644
--- a/packages/dart_firebase_admin/test/auth/token_verifier_test.dart
+++ b/packages/dart_firebase_admin/test/auth/token_verifier_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/src/auth.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/dart_firebase_admin/test/auth/user_test.dart b/packages/dart_firebase_admin/test/auth/user_test.dart
index 67ea39cb..75f69fa4 100644
--- a/packages/dart_firebase_admin/test/auth/user_test.dart
+++ b/packages/dart_firebase_admin/test/auth/user_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/auth.dart';
 import 'package:googleapis/identitytoolkit/v1.dart' as auth1;
 import 'package:test/test.dart';
diff --git a/packages/dart_firebase_admin/test/auth/util/helpers.dart b/packages/dart_firebase_admin/test/auth/util/helpers.dart
index 361b6083..fa6189dc 100644
--- a/packages/dart_firebase_admin/test/auth/util/helpers.dart
+++ b/packages/dart_firebase_admin/test/auth/util/helpers.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:io';
 
diff --git a/packages/dart_firebase_admin/test/client/get_id_token.js b/packages/dart_firebase_admin/test/client/get_id_token.js
index 459525bc..821ef8e7 100644
--- a/packages/dart_firebase_admin/test/client/get_id_token.js
+++ b/packages/dart_firebase_admin/test/client/get_id_token.js
@@ -1,3 +1,19 @@
+/**
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 const { initializeApp } = require("firebase/app");
 const {
   getAuth,
diff --git a/packages/dart_firebase_admin/test/credential_test.dart b/packages/dart_firebase_admin/test/credential_test.dart
index b2723925..8285349e 100644
--- a/packages/dart_firebase_admin/test/credential_test.dart
+++ b/packages/dart_firebase_admin/test/credential_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
diff --git a/packages/dart_firebase_admin/test/firebase_admin_app_test.dart b/packages/dart_firebase_admin/test/firebase_admin_app_test.dart
index a8c78147..19f1be8d 100644
--- a/packages/dart_firebase_admin/test/firebase_admin_app_test.dart
+++ b/packages/dart_firebase_admin/test/firebase_admin_app_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:dart_firebase_admin/src/app.dart';
diff --git a/packages/dart_firebase_admin/test/firestore/firestore_integration_test.dart b/packages/dart_firebase_admin/test/firestore/firestore_integration_test.dart
index a562eb68..9d660558 100644
--- a/packages/dart_firebase_admin/test/firestore/firestore_integration_test.dart
+++ b/packages/dart_firebase_admin/test/firestore/firestore_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/src/app.dart';
 import 'package:google_cloud_firestore/google_cloud_firestore.dart' as gfs;
 import 'package:test/test.dart';
diff --git a/packages/dart_firebase_admin/test/firestore/firestore_test.dart b/packages/dart_firebase_admin/test/firestore/firestore_test.dart
index b164b064..d231c6fa 100644
--- a/packages/dart_firebase_admin/test/firestore/firestore_test.dart
+++ b/packages/dart_firebase_admin/test/firestore/firestore_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:io';
 
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
diff --git a/packages/dart_firebase_admin/test/functions/functions_integration_test.dart b/packages/dart_firebase_admin/test/functions/functions_integration_test.dart
index 4010b3c5..15c14ffb 100644
--- a/packages/dart_firebase_admin/test/functions/functions_integration_test.dart
+++ b/packages/dart_firebase_admin/test/functions/functions_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/functions.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/dart_firebase_admin/test/functions/functions_test.dart b/packages/dart_firebase_admin/test/functions/functions_test.dart
index 0aea0059..5a27a1d4 100644
--- a/packages/dart_firebase_admin/test/functions/functions_test.dart
+++ b/packages/dart_firebase_admin/test/functions/functions_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:convert';
 
diff --git a/packages/dart_firebase_admin/test/functions/src/index.ts b/packages/dart_firebase_admin/test/functions/src/index.ts
index b2e16a54..88c864b6 100644
--- a/packages/dart_firebase_admin/test/functions/src/index.ts
+++ b/packages/dart_firebase_admin/test/functions/src/index.ts
@@ -1,3 +1,19 @@
+/**
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 import { onTaskDispatched } from "firebase-functions/v2/tasks";
 
 export const helloWorld = onTaskDispatched(
diff --git a/packages/dart_firebase_admin/test/functions/util/helpers.dart b/packages/dart_firebase_admin/test/functions/util/helpers.dart
index b54aafaf..13a50179 100644
--- a/packages/dart_firebase_admin/test/functions/util/helpers.dart
+++ b/packages/dart_firebase_admin/test/functions/util/helpers.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/functions.dart';
 import 'package:dart_firebase_admin/src/app.dart';
 import 'package:googleapis_auth/auth_io.dart';
diff --git a/packages/dart_firebase_admin/test/helpers.dart b/packages/dart_firebase_admin/test/helpers.dart
index e346b86e..832eb2f9 100644
--- a/packages/dart_firebase_admin/test/helpers.dart
+++ b/packages/dart_firebase_admin/test/helpers.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:io';
 
diff --git a/packages/dart_firebase_admin/test/messaging/messaging_integration_test.dart b/packages/dart_firebase_admin/test/messaging/messaging_integration_test.dart
index c1d8bbac..9ff102d9 100644
--- a/packages/dart_firebase_admin/test/messaging/messaging_integration_test.dart
+++ b/packages/dart_firebase_admin/test/messaging/messaging_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // Firebase Messaging Integration Tests
 //
 // SAFETY: FCM has no emulator support, so these tests hit the real API.
diff --git a/packages/dart_firebase_admin/test/messaging/messaging_test.dart b/packages/dart_firebase_admin/test/messaging/messaging_test.dart
index 268891f3..717dd719 100644
--- a/packages/dart_firebase_admin/test/messaging/messaging_test.dart
+++ b/packages/dart_firebase_admin/test/messaging/messaging_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:convert';
 
 import 'package:dart_firebase_admin/src/messaging/messaging.dart';
diff --git a/packages/dart_firebase_admin/test/mock.dart b/packages/dart_firebase_admin/test/mock.dart
index c729238a..3b69b8ad 100644
--- a/packages/dart_firebase_admin/test/mock.dart
+++ b/packages/dart_firebase_admin/test/mock.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 import 'package:dart_firebase_admin/src/auth.dart';
 import 'package:googleapis/fcm/v1.dart';
diff --git a/packages/dart_firebase_admin/test/mock_service_account.dart b/packages/dart_firebase_admin/test/mock_service_account.dart
index f19f946a..8125ec07 100644
--- a/packages/dart_firebase_admin/test/mock_service_account.dart
+++ b/packages/dart_firebase_admin/test/mock_service_account.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // IMPORTANT: this key has been specifically generated for this test suite.
 
 const mockPrivateKey = '''
diff --git a/packages/dart_firebase_admin/test/security_rules/security_rules_integration_prod_test.dart b/packages/dart_firebase_admin/test/security_rules/security_rules_integration_prod_test.dart
index 629927eb..783b25e4 100644
--- a/packages/dart_firebase_admin/test/security_rules/security_rules_integration_prod_test.dart
+++ b/packages/dart_firebase_admin/test/security_rules/security_rules_integration_prod_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/security_rules.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/dart_firebase_admin/test/security_rules/security_rules_test.dart b/packages/dart_firebase_admin/test/security_rules/security_rules_test.dart
index e6f789cf..0513d84d 100644
--- a/packages/dart_firebase_admin/test/security_rules/security_rules_test.dart
+++ b/packages/dart_firebase_admin/test/security_rules/security_rules_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:dart_firebase_admin/dart_firebase_admin.dart';
 import 'package:dart_firebase_admin/src/security_rules/security_rules.dart';
 import 'package:mocktail/mocktail.dart';
diff --git a/packages/dart_firebase_admin/test/storage/storage_integration_test.dart b/packages/dart_firebase_admin/test/storage/storage_integration_test.dart
index a80d6a78..e65c68e8 100644
--- a/packages/dart_firebase_admin/test/storage/storage_integration_test.dart
+++ b/packages/dart_firebase_admin/test/storage/storage_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:typed_data';
 
 import 'package:dart_firebase_admin/src/app.dart';
diff --git a/packages/dart_firebase_admin/test/storage/storage_prod_test.dart b/packages/dart_firebase_admin/test/storage/storage_prod_test.dart
index f66ce5ef..cecbaee3 100644
--- a/packages/dart_firebase_admin/test/storage/storage_prod_test.dart
+++ b/packages/dart_firebase_admin/test/storage/storage_prod_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:typed_data';
 
diff --git a/packages/dart_firebase_admin/test/storage/storage_test.dart b/packages/dart_firebase_admin/test/storage/storage_test.dart
index 53207f10..3500ee0a 100644
--- a/packages/dart_firebase_admin/test/storage/storage_test.dart
+++ b/packages/dart_firebase_admin/test/storage/storage_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:convert';
 
diff --git a/packages/google_cloud_firestore/lib/google_cloud_firestore.dart b/packages/google_cloud_firestore/lib/google_cloud_firestore.dart
index 1897fee9..b8191f93 100644
--- a/packages/google_cloud_firestore/lib/google_cloud_firestore.dart
+++ b/packages/google_cloud_firestore/lib/google_cloud_firestore.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 /// Google Cloud Firestore client library for Dart.
 ///
 /// This library provides a Dart client for Google Cloud Firestore, allowing
diff --git a/packages/google_cloud_firestore/lib/src/aggregate.dart b/packages/google_cloud_firestore/lib/src/aggregate.dart
index c5790461..0736d1e0 100644
--- a/packages/google_cloud_firestore/lib/src/aggregate.dart
+++ b/packages/google_cloud_firestore/lib/src/aggregate.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 class AggregateField {
diff --git a/packages/google_cloud_firestore/lib/src/aggregation_reader.dart b/packages/google_cloud_firestore/lib/src/aggregation_reader.dart
index ff15e19b..20d38575 100644
--- a/packages/google_cloud_firestore/lib/src/aggregation_reader.dart
+++ b/packages/google_cloud_firestore/lib/src/aggregation_reader.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// Response wrapper containing both aggregation results and transaction ID.
diff --git a/packages/google_cloud_firestore/lib/src/backoff.dart b/packages/google_cloud_firestore/lib/src/backoff.dart
index c5df36fe..3a283ed2 100644
--- a/packages/google_cloud_firestore/lib/src/backoff.dart
+++ b/packages/google_cloud_firestore/lib/src/backoff.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:math' as math;
 import 'package:meta/meta.dart';
 
diff --git a/packages/google_cloud_firestore/lib/src/bulk_writer.dart b/packages/google_cloud_firestore/lib/src/bulk_writer.dart
index 6a07ee6d..7e75109a 100644
--- a/packages/google_cloud_firestore/lib/src/bulk_writer.dart
+++ b/packages/google_cloud_firestore/lib/src/bulk_writer.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// The maximum number of writes that can be in a single batch.
diff --git a/packages/google_cloud_firestore/lib/src/bundle.dart b/packages/google_cloud_firestore/lib/src/bundle.dart
index 7c0510ee..ab6a99d9 100644
--- a/packages/google_cloud_firestore/lib/src/bundle.dart
+++ b/packages/google_cloud_firestore/lib/src/bundle.dart
@@ -1,10 +1,10 @@
-// Copyright 2020 Google LLC
+// Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
-//     https://www.apache.org/licenses/LICENSE-2.0
+//     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/packages/google_cloud_firestore/lib/src/collection_group.dart b/packages/google_cloud_firestore/lib/src/collection_group.dart
index 7939c7cc..4d03b1fe 100644
--- a/packages/google_cloud_firestore/lib/src/collection_group.dart
+++ b/packages/google_cloud_firestore/lib/src/collection_group.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 @immutable
diff --git a/packages/google_cloud_firestore/lib/src/convert.dart b/packages/google_cloud_firestore/lib/src/convert.dart
index 3d307de8..3a434c1a 100644
--- a/packages/google_cloud_firestore/lib/src/convert.dart
+++ b/packages/google_cloud_firestore/lib/src/convert.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// Verifies that a `Value` only has a single type set.
diff --git a/packages/google_cloud_firestore/lib/src/credential.dart b/packages/google_cloud_firestore/lib/src/credential.dart
index eed5e479..c5b4021b 100644
--- a/packages/google_cloud_firestore/lib/src/credential.dart
+++ b/packages/google_cloud_firestore/lib/src/credential.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:io';
 
 import 'package:googleapis_auth/auth_io.dart' as googleapis_auth;
diff --git a/packages/google_cloud_firestore/lib/src/document.dart b/packages/google_cloud_firestore/lib/src/document.dart
index 9558ea09..ebea819c 100644
--- a/packages/google_cloud_firestore/lib/src/document.dart
+++ b/packages/google_cloud_firestore/lib/src/document.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 class Optional<T> {
diff --git a/packages/google_cloud_firestore/lib/src/document_change.dart b/packages/google_cloud_firestore/lib/src/document_change.dart
index 3c598c50..ef38695c 100644
--- a/packages/google_cloud_firestore/lib/src/document_change.dart
+++ b/packages/google_cloud_firestore/lib/src/document_change.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 enum DocumentChangeType { added, removed, modified }
diff --git a/packages/google_cloud_firestore/lib/src/document_reader.dart b/packages/google_cloud_firestore/lib/src/document_reader.dart
index bc7c097f..f0b9f82b 100644
--- a/packages/google_cloud_firestore/lib/src/document_reader.dart
+++ b/packages/google_cloud_firestore/lib/src/document_reader.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 class _BatchGetResponse<T> {
diff --git a/packages/google_cloud_firestore/lib/src/environment.dart b/packages/google_cloud_firestore/lib/src/environment.dart
index 360abb04..1fc2921f 100644
--- a/packages/google_cloud_firestore/lib/src/environment.dart
+++ b/packages/google_cloud_firestore/lib/src/environment.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:io';
 
diff --git a/packages/google_cloud_firestore/lib/src/field_value.dart b/packages/google_cloud_firestore/lib/src/field_value.dart
index 92b1c19e..3e4a05c8 100644
--- a/packages/google_cloud_firestore/lib/src/field_value.dart
+++ b/packages/google_cloud_firestore/lib/src/field_value.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// Represents a vector value in Firestore.
diff --git a/packages/google_cloud_firestore/lib/src/filter.dart b/packages/google_cloud_firestore/lib/src/filter.dart
index c7e645f8..9a62cf45 100644
--- a/packages/google_cloud_firestore/lib/src/filter.dart
+++ b/packages/google_cloud_firestore/lib/src/filter.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 enum WhereFilter {
diff --git a/packages/google_cloud_firestore/lib/src/firestore.dart b/packages/google_cloud_firestore/lib/src/firestore.dart
index 82a0f3fd..37bf492c 100644
--- a/packages/google_cloud_firestore/lib/src/firestore.dart
+++ b/packages/google_cloud_firestore/lib/src/firestore.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'dart:convert' show jsonEncode, utf8;
 import 'dart:math' as math;
diff --git a/packages/google_cloud_firestore/lib/src/firestore_exception.dart b/packages/google_cloud_firestore/lib/src/firestore_exception.dart
index 4771c201..5fbff579 100644
--- a/packages/google_cloud_firestore/lib/src/firestore_exception.dart
+++ b/packages/google_cloud_firestore/lib/src/firestore_exception.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:convert';
 
 import 'package:googleapis/firestore/v1.dart' as firestore_v1;
diff --git a/packages/google_cloud_firestore/lib/src/firestore_http_client.dart b/packages/google_cloud_firestore/lib/src/firestore_http_client.dart
index 7aa5187d..118e9893 100644
--- a/packages/google_cloud_firestore/lib/src/firestore_http_client.dart
+++ b/packages/google_cloud_firestore/lib/src/firestore_http_client.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:google_cloud/constants.dart' as google_cloud;
diff --git a/packages/google_cloud_firestore/lib/src/geo_point.dart b/packages/google_cloud_firestore/lib/src/geo_point.dart
index 8b365409..e3c6031d 100644
--- a/packages/google_cloud_firestore/lib/src/geo_point.dart
+++ b/packages/google_cloud_firestore/lib/src/geo_point.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// An immutable object representing a geographic location in Firestore. The
diff --git a/packages/google_cloud_firestore/lib/src/logger.dart b/packages/google_cloud_firestore/lib/src/logger.dart
index 8b137891..8615b4f8 100644
--- a/packages/google_cloud_firestore/lib/src/logger.dart
+++ b/packages/google_cloud_firestore/lib/src/logger.dart
@@ -1 +1,13 @@
-
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
diff --git a/packages/google_cloud_firestore/lib/src/order.dart b/packages/google_cloud_firestore/lib/src/order.dart
index 4e2b42c0..f35b5e72 100644
--- a/packages/google_cloud_firestore/lib/src/order.dart
+++ b/packages/google_cloud_firestore/lib/src/order.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// The type order as defined by the Firestore backend.
diff --git a/packages/google_cloud_firestore/lib/src/path.dart b/packages/google_cloud_firestore/lib/src/path.dart
index efe65ef5..37d040ad 100644
--- a/packages/google_cloud_firestore/lib/src/path.dart
+++ b/packages/google_cloud_firestore/lib/src/path.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// Validates that the given string can be used as a relative or absolute
diff --git a/packages/google_cloud_firestore/lib/src/query_partition.dart b/packages/google_cloud_firestore/lib/src/query_partition.dart
index b6a421c8..09cf6c43 100644
--- a/packages/google_cloud_firestore/lib/src/query_partition.dart
+++ b/packages/google_cloud_firestore/lib/src/query_partition.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// A split point that can be used in a query as a starting and/or end point for
diff --git a/packages/google_cloud_firestore/lib/src/query_profile.dart b/packages/google_cloud_firestore/lib/src/query_profile.dart
index 9646c65a..1923f7ce 100644
--- a/packages/google_cloud_firestore/lib/src/query_profile.dart
+++ b/packages/google_cloud_firestore/lib/src/query_profile.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// PlanSummary contains information about the planning stage of a query.
diff --git a/packages/google_cloud_firestore/lib/src/query_reader.dart b/packages/google_cloud_firestore/lib/src/query_reader.dart
index 72eedf6f..0c5e78bc 100644
--- a/packages/google_cloud_firestore/lib/src/query_reader.dart
+++ b/packages/google_cloud_firestore/lib/src/query_reader.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// Response wrapper containing both query results and transaction ID.
diff --git a/packages/google_cloud_firestore/lib/src/rate_limiter.dart b/packages/google_cloud_firestore/lib/src/rate_limiter.dart
index aa161a0b..ba861f41 100644
--- a/packages/google_cloud_firestore/lib/src/rate_limiter.dart
+++ b/packages/google_cloud_firestore/lib/src/rate_limiter.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// A helper for rate limiting operations using a token bucket algorithm.
diff --git a/packages/google_cloud_firestore/lib/src/recursive_delete.dart b/packages/google_cloud_firestore/lib/src/recursive_delete.dart
index 658cc879..bd034f80 100644
--- a/packages/google_cloud_firestore/lib/src/recursive_delete.dart
+++ b/packages/google_cloud_firestore/lib/src/recursive_delete.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// Datastore allowed numeric IDs where Firestore only allows strings. Numeric
diff --git a/packages/google_cloud_firestore/lib/src/reference/aggregate_query.dart b/packages/google_cloud_firestore/lib/src/reference/aggregate_query.dart
index 34ac5644..eb9514f8 100644
--- a/packages/google_cloud_firestore/lib/src/reference/aggregate_query.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/aggregate_query.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 @immutable
diff --git a/packages/google_cloud_firestore/lib/src/reference/aggregate_query_snapshot.dart b/packages/google_cloud_firestore/lib/src/reference/aggregate_query_snapshot.dart
index 4086392b..101aa233 100644
--- a/packages/google_cloud_firestore/lib/src/reference/aggregate_query_snapshot.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/aggregate_query_snapshot.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 /// The results of executing an aggregation query.
diff --git a/packages/google_cloud_firestore/lib/src/reference/collection_reference.dart b/packages/google_cloud_firestore/lib/src/reference/collection_reference.dart
index 3042e479..e8a08ca2 100644
--- a/packages/google_cloud_firestore/lib/src/reference/collection_reference.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/collection_reference.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 @immutable
diff --git a/packages/google_cloud_firestore/lib/src/reference/composite_filter_internal.dart b/packages/google_cloud_firestore/lib/src/reference/composite_filter_internal.dart
index 06c6189a..2e78b89e 100644
--- a/packages/google_cloud_firestore/lib/src/reference/composite_filter_internal.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/composite_filter_internal.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 class _CompositeFilterInternal extends _FilterInternal {
diff --git a/packages/google_cloud_firestore/lib/src/reference/constants.dart b/packages/google_cloud_firestore/lib/src/reference/constants.dart
index d565be66..b82bcaf0 100644
--- a/packages/google_cloud_firestore/lib/src/reference/constants.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/constants.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 enum _Direction {
diff --git a/packages/google_cloud_firestore/lib/src/reference/document_reference.dart b/packages/google_cloud_firestore/lib/src/reference/document_reference.dart
index c05b4179..8cb0d96b 100644
--- a/packages/google_cloud_firestore/lib/src/reference/document_reference.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/document_reference.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 @immutable
diff --git a/packages/google_cloud_firestore/lib/src/reference/field_filter_internal.dart b/packages/google_cloud_firestore/lib/src/reference/field_filter_internal.dart
index 9d1f0dde..dfa22242 100644
--- a/packages/google_cloud_firestore/lib/src/reference/field_filter_internal.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/field_filter_internal.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 class _FieldFilterInternal extends _FilterInternal {
diff --git a/packages/google_cloud_firestore/lib/src/reference/field_order.dart b/packages/google_cloud_firestore/lib/src/reference/field_order.dart
index da8918eb..0a102ede 100644
--- a/packages/google_cloud_firestore/lib/src/reference/field_order.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/field_order.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 /// A Query order-by field.
diff --git a/packages/google_cloud_firestore/lib/src/reference/filter_internal.dart b/packages/google_cloud_firestore/lib/src/reference/filter_internal.dart
index 28481a22..da03114c 100644
--- a/packages/google_cloud_firestore/lib/src/reference/filter_internal.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/filter_internal.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 @immutable
diff --git a/packages/google_cloud_firestore/lib/src/reference/query.dart b/packages/google_cloud_firestore/lib/src/reference/query.dart
index 6a8f1d1d..61b58ebb 100644
--- a/packages/google_cloud_firestore/lib/src/reference/query.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/query.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 @immutable
diff --git a/packages/google_cloud_firestore/lib/src/reference/query_options.dart b/packages/google_cloud_firestore/lib/src/reference/query_options.dart
index 4f4e1513..94777036 100644
--- a/packages/google_cloud_firestore/lib/src/reference/query_options.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/query_options.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 @immutable
diff --git a/packages/google_cloud_firestore/lib/src/reference/query_snapshot.dart b/packages/google_cloud_firestore/lib/src/reference/query_snapshot.dart
index e89c87c1..ccf6b2d7 100644
--- a/packages/google_cloud_firestore/lib/src/reference/query_snapshot.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/query_snapshot.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 @immutable
diff --git a/packages/google_cloud_firestore/lib/src/reference/query_util.dart b/packages/google_cloud_firestore/lib/src/reference/query_util.dart
index 40fe73eb..c502c0aa 100644
--- a/packages/google_cloud_firestore/lib/src/reference/query_util.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/query_util.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 bool _valuesEqual(List<firestore_v1.Value>? a, List<firestore_v1.Value>? b) {
diff --git a/packages/google_cloud_firestore/lib/src/reference/types.dart b/packages/google_cloud_firestore/lib/src/reference/types.dart
index 8e6239b0..ae79e74c 100644
--- a/packages/google_cloud_firestore/lib/src/reference/types.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/types.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 /// Denotes whether a provided limit is applied to the beginning or the end of
diff --git a/packages/google_cloud_firestore/lib/src/reference/vector_query.dart b/packages/google_cloud_firestore/lib/src/reference/vector_query.dart
index 0ebedd93..ca4fac36 100644
--- a/packages/google_cloud_firestore/lib/src/reference/vector_query.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/vector_query.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 /// A query that finds the documents whose vector fields are closest to a certain query vector.
diff --git a/packages/google_cloud_firestore/lib/src/reference/vector_query_options.dart b/packages/google_cloud_firestore/lib/src/reference/vector_query_options.dart
index 261f5559..bb1cb174 100644
--- a/packages/google_cloud_firestore/lib/src/reference/vector_query_options.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/vector_query_options.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 /// Distance measures for vector queries.
diff --git a/packages/google_cloud_firestore/lib/src/reference/vector_query_snapshot.dart b/packages/google_cloud_firestore/lib/src/reference/vector_query_snapshot.dart
index e2e2bde5..94dbc29a 100644
--- a/packages/google_cloud_firestore/lib/src/reference/vector_query_snapshot.dart
+++ b/packages/google_cloud_firestore/lib/src/reference/vector_query_snapshot.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of '../firestore.dart';
 
 /// A `VectorQuerySnapshot` contains zero or more [QueryDocumentSnapshot] objects
diff --git a/packages/google_cloud_firestore/lib/src/serializer.dart b/packages/google_cloud_firestore/lib/src/serializer.dart
index bdd1c03f..21111b68 100644
--- a/packages/google_cloud_firestore/lib/src/serializer.dart
+++ b/packages/google_cloud_firestore/lib/src/serializer.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 @internal
diff --git a/packages/google_cloud_firestore/lib/src/set_options.dart b/packages/google_cloud_firestore/lib/src/set_options.dart
index 0306c47a..6f064f51 100644
--- a/packages/google_cloud_firestore/lib/src/set_options.dart
+++ b/packages/google_cloud_firestore/lib/src/set_options.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// Options to configure [WriteBatch.set], [Transaction.set], and [BulkWriter.set] behavior.
diff --git a/packages/google_cloud_firestore/lib/src/status_code.dart b/packages/google_cloud_firestore/lib/src/status_code.dart
index 9405f734..82255a9b 100644
--- a/packages/google_cloud_firestore/lib/src/status_code.dart
+++ b/packages/google_cloud_firestore/lib/src/status_code.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 /// Status codes for Firestore operations.
 ///
 /// These codes are used to indicate the result of Firestore operations and
diff --git a/packages/google_cloud_firestore/lib/src/timestamp.dart b/packages/google_cloud_firestore/lib/src/timestamp.dart
index 91b62cb9..fcdb73e3 100644
--- a/packages/google_cloud_firestore/lib/src/timestamp.dart
+++ b/packages/google_cloud_firestore/lib/src/timestamp.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// Encode seconds+nanoseconds to a Google Firestore timestamp string.
diff --git a/packages/google_cloud_firestore/lib/src/transaction.dart b/packages/google_cloud_firestore/lib/src/transaction.dart
index 9e9c46c2..63d1563a 100644
--- a/packages/google_cloud_firestore/lib/src/transaction.dart
+++ b/packages/google_cloud_firestore/lib/src/transaction.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 class ReadOptions {
diff --git a/packages/google_cloud_firestore/lib/src/types.dart b/packages/google_cloud_firestore/lib/src/types.dart
index e1978320..b4214b93 100644
--- a/packages/google_cloud_firestore/lib/src/types.dart
+++ b/packages/google_cloud_firestore/lib/src/types.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// A map of string keys to dynamic values representing Firestore document data.
diff --git a/packages/google_cloud_firestore/lib/src/util.dart b/packages/google_cloud_firestore/lib/src/util.dart
index 50a33250..28faea03 100644
--- a/packages/google_cloud_firestore/lib/src/util.dart
+++ b/packages/google_cloud_firestore/lib/src/util.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 extension ObjectUtils<T> on T? {
diff --git a/packages/google_cloud_firestore/lib/src/validate.dart b/packages/google_cloud_firestore/lib/src/validate.dart
index ebd8e97d..b5760dec 100644
--- a/packages/google_cloud_firestore/lib/src/validate.dart
+++ b/packages/google_cloud_firestore/lib/src/validate.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// Validates that 'value' is a host.
diff --git a/packages/google_cloud_firestore/lib/src/write_batch.dart b/packages/google_cloud_firestore/lib/src/write_batch.dart
index 8ec85516..787f3d22 100644
--- a/packages/google_cloud_firestore/lib/src/write_batch.dart
+++ b/packages/google_cloud_firestore/lib/src/write_batch.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 part of 'firestore.dart';
 
 /// A WriteResult wraps the write time set by the Firestore servers on sets(),
diff --git a/packages/google_cloud_firestore/lib/version.g.dart b/packages/google_cloud_firestore/lib/version.g.dart
index eddf3176..5c60e628 100644
--- a/packages/google_cloud_firestore/lib/version.g.dart
+++ b/packages/google_cloud_firestore/lib/version.g.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // GENERATED CODE - DO NOT MODIFY BY HAND
 // This file is generated by gen-version.sh
 
diff --git a/packages/google_cloud_firestore/test/aggregate_query_test.dart b/packages/google_cloud_firestore/test/aggregate_query_test.dart
index 94601bca..1875581d 100644
--- a/packages/google_cloud_firestore/test/aggregate_query_test.dart
+++ b/packages/google_cloud_firestore/test/aggregate_query_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/backoff_test.dart b/packages/google_cloud_firestore/test/backoff_test.dart
index 58b145dc..d4446e73 100644
--- a/packages/google_cloud_firestore/test/backoff_test.dart
+++ b/packages/google_cloud_firestore/test/backoff_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // ignore_for_file: invalid_use_of_internal_member
 
 import 'package:google_cloud_firestore/src/backoff.dart';
diff --git a/packages/google_cloud_firestore/test/bulk_writer_integration_test.dart b/packages/google_cloud_firestore/test/bulk_writer_integration_test.dart
index c7828ec8..276140aa 100644
--- a/packages/google_cloud_firestore/test/bulk_writer_integration_test.dart
+++ b/packages/google_cloud_firestore/test/bulk_writer_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
diff --git a/packages/google_cloud_firestore/test/bulk_writer_test.dart b/packages/google_cloud_firestore/test/bulk_writer_test.dart
index 9e4ccfae..81a9f8c9 100644
--- a/packages/google_cloud_firestore/test/bulk_writer_test.dart
+++ b/packages/google_cloud_firestore/test/bulk_writer_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
diff --git a/packages/google_cloud_firestore/test/bundle_integration_test.dart b/packages/google_cloud_firestore/test/bundle_integration_test.dart
index 152625f4..c4e255e4 100644
--- a/packages/google_cloud_firestore/test/bundle_integration_test.dart
+++ b/packages/google_cloud_firestore/test/bundle_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:convert';
 import 'dart:typed_data';
 
diff --git a/packages/google_cloud_firestore/test/bundle_test.dart b/packages/google_cloud_firestore/test/bundle_test.dart
index f9341f49..e716b9fc 100644
--- a/packages/google_cloud_firestore/test/bundle_test.dart
+++ b/packages/google_cloud_firestore/test/bundle_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:convert';
 import 'dart:typed_data';
 
diff --git a/packages/google_cloud_firestore/test/collection_group_test.dart b/packages/google_cloud_firestore/test/collection_group_test.dart
index c7b6ae95..05701dfb 100644
--- a/packages/google_cloud_firestore/test/collection_group_test.dart
+++ b/packages/google_cloud_firestore/test/collection_group_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/collection_test.dart b/packages/google_cloud_firestore/test/collection_test.dart
index e38d4f4a..0ec9360b 100644
--- a/packages/google_cloud_firestore/test/collection_test.dart
+++ b/packages/google_cloud_firestore/test/collection_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart' hide throwsArgumentError;
 
diff --git a/packages/google_cloud_firestore/test/document_test.dart b/packages/google_cloud_firestore/test/document_test.dart
index a61b4009..4ff264b8 100644
--- a/packages/google_cloud_firestore/test/document_test.dart
+++ b/packages/google_cloud_firestore/test/document_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart' hide throwsArgumentError;
 
diff --git a/packages/google_cloud_firestore/test/explain_prod_test.dart b/packages/google_cloud_firestore/test/explain_prod_test.dart
index 7c07adbe..eb40339d 100644
--- a/packages/google_cloud_firestore/test/explain_prod_test.dart
+++ b/packages/google_cloud_firestore/test/explain_prod_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
diff --git a/packages/google_cloud_firestore/test/field_value_test.dart b/packages/google_cloud_firestore/test/field_value_test.dart
index d0e7560d..024d8a40 100644
--- a/packages/google_cloud_firestore/test/field_value_test.dart
+++ b/packages/google_cloud_firestore/test/field_value_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/filter_test.dart b/packages/google_cloud_firestore/test/filter_test.dart
index 4b5652b2..7c34780b 100644
--- a/packages/google_cloud_firestore/test/filter_test.dart
+++ b/packages/google_cloud_firestore/test/filter_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/firestore_integration_test.dart b/packages/google_cloud_firestore/test/firestore_integration_test.dart
index f7c3c2bf..091f0b38 100644
--- a/packages/google_cloud_firestore/test/firestore_integration_test.dart
+++ b/packages/google_cloud_firestore/test/firestore_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/firestore_test.dart b/packages/google_cloud_firestore/test/firestore_test.dart
index f035990d..6771027f 100644
--- a/packages/google_cloud_firestore/test/firestore_test.dart
+++ b/packages/google_cloud_firestore/test/firestore_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/get_all_integration_test.dart b/packages/google_cloud_firestore/test/get_all_integration_test.dart
index dca661e8..9f439422 100644
--- a/packages/google_cloud_firestore/test/get_all_integration_test.dart
+++ b/packages/google_cloud_firestore/test/get_all_integration_test.dart
@@ -1,6 +1,17 @@
-// Copyright 2020, the Chromium project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:google_cloud_firestore/src/firestore.dart' show FieldMask;
diff --git a/packages/google_cloud_firestore/test/get_all_test.dart b/packages/google_cloud_firestore/test/get_all_test.dart
index 8e7e490c..a6aac377 100644
--- a/packages/google_cloud_firestore/test/get_all_test.dart
+++ b/packages/google_cloud_firestore/test/get_all_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:google_cloud_firestore/src/firestore.dart' show FieldMask;
 import 'package:google_cloud_firestore/src/firestore_http_client.dart';
diff --git a/packages/google_cloud_firestore/test/helpers.dart b/packages/google_cloud_firestore/test/helpers.dart
index 2c55fb57..f57803d2 100644
--- a/packages/google_cloud_firestore/test/helpers.dart
+++ b/packages/google_cloud_firestore/test/helpers.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:io';
 
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
diff --git a/packages/google_cloud_firestore/test/order_test.dart b/packages/google_cloud_firestore/test/order_test.dart
index a56b3b7e..bc7f3e02 100644
--- a/packages/google_cloud_firestore/test/order_test.dart
+++ b/packages/google_cloud_firestore/test/order_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/src/firestore.dart';
 import 'package:googleapis/firestore/v1.dart' as firestore_v1;
 import 'package:test/test.dart';
diff --git a/packages/google_cloud_firestore/test/query_partition_prod_test.dart b/packages/google_cloud_firestore/test/query_partition_prod_test.dart
index 0ff9adbb..d5260268 100644
--- a/packages/google_cloud_firestore/test/query_partition_prod_test.dart
+++ b/packages/google_cloud_firestore/test/query_partition_prod_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
diff --git a/packages/google_cloud_firestore/test/query_partition_test.dart b/packages/google_cloud_firestore/test/query_partition_test.dart
index d22a0ca2..1a20783a 100644
--- a/packages/google_cloud_firestore/test/query_partition_test.dart
+++ b/packages/google_cloud_firestore/test/query_partition_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
diff --git a/packages/google_cloud_firestore/test/query_test.dart b/packages/google_cloud_firestore/test/query_test.dart
index 7a930a13..77d7eae2 100644
--- a/packages/google_cloud_firestore/test/query_test.dart
+++ b/packages/google_cloud_firestore/test/query_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/rate_limiter_test.dart b/packages/google_cloud_firestore/test/rate_limiter_test.dart
index b10b9c29..7bd674bc 100644
--- a/packages/google_cloud_firestore/test/rate_limiter_test.dart
+++ b/packages/google_cloud_firestore/test/rate_limiter_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // ignore_for_file: invalid_use_of_internal_member, invalid_use_of_visible_for_testing_member
 
 import 'package:google_cloud_firestore/src/firestore.dart';
diff --git a/packages/google_cloud_firestore/test/recursive_delete_integration_test.dart b/packages/google_cloud_firestore/test/recursive_delete_integration_test.dart
index 13ab50aa..8400f1e1 100644
--- a/packages/google_cloud_firestore/test/recursive_delete_integration_test.dart
+++ b/packages/google_cloud_firestore/test/recursive_delete_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/recursive_delete_test.dart b/packages/google_cloud_firestore/test/recursive_delete_test.dart
index 5161b047..b3296b2f 100644
--- a/packages/google_cloud_firestore/test/recursive_delete_test.dart
+++ b/packages/google_cloud_firestore/test/recursive_delete_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
diff --git a/packages/google_cloud_firestore/test/set_options_integration_test.dart b/packages/google_cloud_firestore/test/set_options_integration_test.dart
index 0a04ba22..a626dd31 100644
--- a/packages/google_cloud_firestore/test/set_options_integration_test.dart
+++ b/packages/google_cloud_firestore/test/set_options_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/timestamp_test.dart b/packages/google_cloud_firestore/test/timestamp_test.dart
index 84cffdeb..2045ca1e 100644
--- a/packages/google_cloud_firestore/test/timestamp_test.dart
+++ b/packages/google_cloud_firestore/test/timestamp_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/transaction_aggregation_test.dart b/packages/google_cloud_firestore/test/transaction_aggregation_test.dart
index c3c56a09..5ea8b75a 100644
--- a/packages/google_cloud_firestore/test/transaction_aggregation_test.dart
+++ b/packages/google_cloud_firestore/test/transaction_aggregation_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/transaction_query_test.dart b/packages/google_cloud_firestore/test/transaction_query_test.dart
index fa115a7d..b4f52527 100644
--- a/packages/google_cloud_firestore/test/transaction_query_test.dart
+++ b/packages/google_cloud_firestore/test/transaction_query_test.dart
@@ -1,6 +1,17 @@
-// Copyright 2020, the Chromium project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
diff --git a/packages/google_cloud_firestore/test/transaction_test.dart b/packages/google_cloud_firestore/test/transaction_test.dart
index 8dafeee6..5822b328 100644
--- a/packages/google_cloud_firestore/test/transaction_test.dart
+++ b/packages/google_cloud_firestore/test/transaction_test.dart
@@ -1,6 +1,17 @@
-// Copyright 2020, the Chromium project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 
 import 'dart:core';
 import 'dart:math';
diff --git a/packages/google_cloud_firestore/test/transaction_unit_test.dart b/packages/google_cloud_firestore/test/transaction_unit_test.dart
index facb51c3..958d3034 100644
--- a/packages/google_cloud_firestore/test/transaction_unit_test.dart
+++ b/packages/google_cloud_firestore/test/transaction_unit_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/vector_integration_prod_test.dart b/packages/google_cloud_firestore/test/vector_integration_prod_test.dart
index 8007bd91..c134e466 100644
--- a/packages/google_cloud_firestore/test/vector_integration_prod_test.dart
+++ b/packages/google_cloud_firestore/test/vector_integration_prod_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
diff --git a/packages/google_cloud_firestore/test/vector_integration_test.dart b/packages/google_cloud_firestore/test/vector_integration_test.dart
index e1985f07..dea671be 100644
--- a/packages/google_cloud_firestore/test/vector_integration_test.dart
+++ b/packages/google_cloud_firestore/test/vector_integration_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart';
 
diff --git a/packages/google_cloud_firestore/test/vector_test.dart b/packages/google_cloud_firestore/test/vector_test.dart
index 2dc07de7..ecbe447f 100644
--- a/packages/google_cloud_firestore/test/vector_test.dart
+++ b/packages/google_cloud_firestore/test/vector_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'dart:async';
 
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
diff --git a/packages/google_cloud_firestore/test/write_batch_test.dart b/packages/google_cloud_firestore/test/write_batch_test.dart
index 232542ac..f9e936ce 100644
--- a/packages/google_cloud_firestore/test/write_batch_test.dart
+++ b/packages/google_cloud_firestore/test/write_batch_test.dart
@@ -1,3 +1,17 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import 'package:google_cloud_firestore/google_cloud_firestore.dart';
 import 'package:test/test.dart' hide throwsArgumentError;
 
diff --git a/scripts/coverage.sh b/scripts/coverage.sh
index 0be9eacb..4443d16f 100755
--- a/scripts/coverage.sh
+++ b/scripts/coverage.sh
@@ -1,4 +1,18 @@
 #!/bin/bash
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 
 # Fast fail the script on failures.
 set -e
diff --git a/scripts/firestore-coverage.sh b/scripts/firestore-coverage.sh
index 31ac89af..40ffa227 100755
--- a/scripts/firestore-coverage.sh
+++ b/scripts/firestore-coverage.sh
@@ -1,4 +1,18 @@
 #!/bin/bash
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 
 # Fast fail the script on failures.
 set -e
diff --git a/scripts/generate-docs.sh b/scripts/generate-docs.sh
index bffc6c42..521298b8 100755
--- a/scripts/generate-docs.sh
+++ b/scripts/generate-docs.sh
@@ -1,4 +1,18 @@
 #!/bin/bash
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 set -e
 
 # Get the package name from the current directory