diff --git a/packages/camera/camera_android_camerax/example/README.md b/packages/camera/camera_android_camerax/example/README.md
index 438e446d1921..96b8bb17dbff 100644
--- a/packages/camera/camera_android_camerax/example/README.md
+++ b/packages/camera/camera_android_camerax/example/README.md
@@ -1,3 +1,9 @@
-# camera_android_camerax_example
+# Platform Implementation Test App
 
-Demonstrates how to use the camera_android_camerax plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/camera/camera_web/example/README.md b/packages/camera/camera_web/example/README.md
index 8a6e74b107ea..0e51ae5ecbd2 100644
--- a/packages/camera/camera_web/example/README.md
+++ b/packages/camera/camera_web/example/README.md
@@ -1,4 +1,14 @@
-# Testing
+# Platform Implementation Test App
+
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
+
+## Testing
 
 This package uses `package:integration_test` to run its tests in a web browser.
 
@@ -6,4 +16,4 @@ See [Plugin Tests > Web Tests](https://github.com/flutter/flutter/wiki/Plugin-Te
 in the Flutter wiki for instructions to setup and run the tests in this package.
 
 Check [flutter.dev > Integration testing](https://flutter.dev/docs/testing/integration-tests)
-for more info.
\ No newline at end of file
+for more info.
diff --git a/packages/camera/camera_windows/example/README.md b/packages/camera/camera_windows/example/README.md
index ee7326472eaf..96b8bb17dbff 100644
--- a/packages/camera/camera_windows/example/README.md
+++ b/packages/camera/camera_windows/example/README.md
@@ -1,3 +1,9 @@
-# camera_windows_example
+# Platform Implementation Test App
 
-Demonstrates how to use the camera_windows plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/file_selector/file_selector_ios/example/README.md b/packages/file_selector/file_selector_ios/example/README.md
index 9ed63fdb669f..96b8bb17dbff 100644
--- a/packages/file_selector/file_selector_ios/example/README.md
+++ b/packages/file_selector/file_selector_ios/example/README.md
@@ -1,4 +1,9 @@
-# `file_selector_ios` example
+# Platform Implementation Test App
 
-Demonstrates iOS implementation of the
-[`file_selector` plugin](https://pub.dev/packages/file_selector).
\ No newline at end of file
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/file_selector/file_selector_linux/example/README.md b/packages/file_selector/file_selector_linux/example/README.md
index 2f9f8c0f824b..96b8bb17dbff 100644
--- a/packages/file_selector/file_selector_linux/example/README.md
+++ b/packages/file_selector/file_selector_linux/example/README.md
@@ -1,4 +1,9 @@
-# `file_selector_linux` example
+# Platform Implementation Test App
 
-Demonstrates Linux implementation of the
-[`file_selector` plugin](https://pub.dev/packages/file_selector).
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/file_selector/file_selector_macos/example/README.md b/packages/file_selector/file_selector_macos/example/README.md
index 782fe679fcb0..96b8bb17dbff 100644
--- a/packages/file_selector/file_selector_macos/example/README.md
+++ b/packages/file_selector/file_selector_macos/example/README.md
@@ -1,4 +1,9 @@
-# `file_selector_macos` example
+# Platform Implementation Test App
 
-Demonstrates macOS implementation of the
-[`file_selector` plugin](https://pub.dev/packages/file_selector).
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/file_selector/file_selector_web/example/README.md b/packages/file_selector/file_selector_web/example/README.md
index 8a6e74b107ea..0e51ae5ecbd2 100644
--- a/packages/file_selector/file_selector_web/example/README.md
+++ b/packages/file_selector/file_selector_web/example/README.md
@@ -1,4 +1,14 @@
-# Testing
+# Platform Implementation Test App
+
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
+
+## Testing
 
 This package uses `package:integration_test` to run its tests in a web browser.
 
@@ -6,4 +16,4 @@ See [Plugin Tests > Web Tests](https://github.com/flutter/flutter/wiki/Plugin-Te
 in the Flutter wiki for instructions to setup and run the tests in this package.
 
 Check [flutter.dev > Integration testing](https://flutter.dev/docs/testing/integration-tests)
-for more info.
\ No newline at end of file
+for more info.
diff --git a/packages/file_selector/file_selector_windows/example/README.md b/packages/file_selector/file_selector_windows/example/README.md
index c8a3cce44a9a..96b8bb17dbff 100644
--- a/packages/file_selector/file_selector_windows/example/README.md
+++ b/packages/file_selector/file_selector_windows/example/README.md
@@ -1,4 +1,9 @@
-# `file_selector_windows` Example
+# Platform Implementation Test App
 
-Demonstrates Windows implementation of the
-[`file_selector` plugin](https://pub.dev/packages/file_selector).
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/google_maps_flutter/google_maps_flutter_android/example/README.md b/packages/google_maps_flutter/google_maps_flutter_android/example/README.md
index c8852649b065..96b8bb17dbff 100644
--- a/packages/google_maps_flutter/google_maps_flutter_android/example/README.md
+++ b/packages/google_maps_flutter/google_maps_flutter_android/example/README.md
@@ -1,3 +1,9 @@
-# google_maps_flutter_example
+# Platform Implementation Test App
 
-Demonstrates how to use the google_maps_flutter plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/example/README.md b/packages/google_maps_flutter/google_maps_flutter_ios/example/README.md
index c8852649b065..96b8bb17dbff 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/example/README.md
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/example/README.md
@@ -1,3 +1,9 @@
-# google_maps_flutter_example
+# Platform Implementation Test App
 
-Demonstrates how to use the google_maps_flutter plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/google_maps_flutter/google_maps_flutter_web/example/README.md b/packages/google_maps_flutter/google_maps_flutter_web/example/README.md
index 3cdecfab2ab9..0e51ae5ecbd2 100644
--- a/packages/google_maps_flutter/google_maps_flutter_web/example/README.md
+++ b/packages/google_maps_flutter/google_maps_flutter_web/example/README.md
@@ -1,4 +1,14 @@
-# Testing
+# Platform Implementation Test App
+
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
+
+## Testing
 
 This package uses `package:integration_test` to run its tests in a web browser.
 
@@ -7,6 +17,3 @@ in the Flutter wiki for instructions to setup and run the tests in this package.
 
 Check [flutter.dev > Integration testing](https://flutter.dev/docs/testing/integration-tests)
 for more info.
-
-See [Plugin Tests > Web Tests > Mocks](https://github.com/flutter/flutter/wiki/Plugin-Tests#mocks)
-in the Flutter wiki for more information about the `.mocks.dart` files in this package.
\ No newline at end of file
diff --git a/packages/google_sign_in/google_sign_in_android/example/README.md b/packages/google_sign_in/google_sign_in_android/example/README.md
index 8eb153eb8efd..96b8bb17dbff 100644
--- a/packages/google_sign_in/google_sign_in_android/example/README.md
+++ b/packages/google_sign_in/google_sign_in_android/example/README.md
@@ -1,3 +1,9 @@
-# google_sign_in_android example
+# Platform Implementation Test App
 
-Exercises the Android implementation of `GoogleSignInPlatform`.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/google_sign_in/google_sign_in_ios/example/README.md b/packages/google_sign_in/google_sign_in_ios/example/README.md
index 04c3372dc3b0..96b8bb17dbff 100644
--- a/packages/google_sign_in/google_sign_in_ios/example/README.md
+++ b/packages/google_sign_in/google_sign_in_ios/example/README.md
@@ -1,3 +1,9 @@
-# google_sign_in_ios example
+# Platform Implementation Test App
 
-Exercises the iOS implementation of `GoogleSignInPlatform`.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/google_sign_in/google_sign_in_web/example/README.md b/packages/google_sign_in/google_sign_in_web/example/README.md
index 8a6e74b107ea..0e51ae5ecbd2 100644
--- a/packages/google_sign_in/google_sign_in_web/example/README.md
+++ b/packages/google_sign_in/google_sign_in_web/example/README.md
@@ -1,4 +1,14 @@
-# Testing
+# Platform Implementation Test App
+
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
+
+## Testing
 
 This package uses `package:integration_test` to run its tests in a web browser.
 
@@ -6,4 +16,4 @@ See [Plugin Tests > Web Tests](https://github.com/flutter/flutter/wiki/Plugin-Te
 in the Flutter wiki for instructions to setup and run the tests in this package.
 
 Check [flutter.dev > Integration testing](https://flutter.dev/docs/testing/integration-tests)
-for more info.
\ No newline at end of file
+for more info.
diff --git a/packages/image_picker/image_picker_android/example/README.md b/packages/image_picker/image_picker_android/example/README.md
index 16b5c51839f8..96b8bb17dbff 100755
--- a/packages/image_picker/image_picker_android/example/README.md
+++ b/packages/image_picker/image_picker_android/example/README.md
@@ -1,3 +1,9 @@
-# image_picker_example
+# Platform Implementation Test App
 
-Demonstrates how to use the `image_picker` plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/image_picker/image_picker_for_web/example/README.md b/packages/image_picker/image_picker_for_web/example/README.md
index 4348451b14e2..0e51ae5ecbd2 100644
--- a/packages/image_picker/image_picker_for_web/example/README.md
+++ b/packages/image_picker/image_picker_for_web/example/README.md
@@ -1,4 +1,14 @@
-# Testing
+# Platform Implementation Test App
+
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
+
+## Testing
 
 This package uses `package:integration_test` to run its tests in a web browser.
 
diff --git a/packages/image_picker/image_picker_ios/example/README.md b/packages/image_picker/image_picker_ios/example/README.md
index 16b5c51839f8..96b8bb17dbff 100755
--- a/packages/image_picker/image_picker_ios/example/README.md
+++ b/packages/image_picker/image_picker_ios/example/README.md
@@ -1,3 +1,9 @@
-# image_picker_example
+# Platform Implementation Test App
 
-Demonstrates how to use the `image_picker` plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/image_picker/image_picker_windows/example/README.md b/packages/image_picker/image_picker_windows/example/README.md
index 7f61053c6e30..96b8bb17dbff 100644
--- a/packages/image_picker/image_picker_windows/example/README.md
+++ b/packages/image_picker/image_picker_windows/example/README.md
@@ -1,3 +1,9 @@
-# image_picker_windows_example
+# Platform Implementation Test App
 
-Demonstrates how to use the image_picker_windows plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/in_app_purchase/in_app_purchase_android/example/README.md b/packages/in_app_purchase/in_app_purchase_android/example/README.md
index 255e838e5b93..96b8bb17dbff 100644
--- a/packages/in_app_purchase/in_app_purchase_android/example/README.md
+++ b/packages/in_app_purchase/in_app_purchase_android/example/README.md
@@ -1,58 +1,9 @@
-# In App Purchase Example
+# Platform Implementation Test App
 
-Demonstrates how to use the In App Purchase Android (IAP) Plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
 
-## Getting Started
-
-### Preparation
-
-There's a significant amount of setup required for testing in-app purchases
-successfully, including registering new app IDs and store entries to use for
-testing in the Play Developer Console. Google Play requires developers to 
-configure an app with in-app items for purchase to call their in-app-purchase 
-APIs. The Google Play Store has extensive documentation on how to do this, and 
-we've also included a high level guide below.
-
-* [Google Play Billing Overview](https://developer.android.com/google/play/billing/billing_overview)
-
-### Android
-
-1. Create a new app in the [Play Developer
-   Console](https://play.google.com/apps/publish/) (PDC).
-
-2. Sign up for a merchant's account in the PDC.
-
-3. Create IAPs in the PDC available for purchase in the app. The example assumes
-   the following SKU IDs exist:
-
-   - `consumable`: A managed product.
-   - `upgrade`: A managed product.
-   - `subscription_silver`: A lower level subscription.
-   - `subscription_gold`: A higher level subscription.
-
-   Make sure that all of the products are set to `ACTIVE`.
-
-4. Update `APP_ID` in `example/android/app/build.gradle` to match your package
-   ID in the PDC.
-
-5. Create an `example/android/keystore.properties` file with all your signing
-   information. `keystore.example.properties` exists as an example to follow.
-   It's impossible to use any of the `BillingClient` APIs from an unsigned APK.
-   See
-   [here](https://developer.android.com/studio/publish/app-signing#secure-shared-keystore)
-   and [here](https://developer.android.com/studio/publish/app-signing#sign-apk)
-   for more information.
-
-6. Build a signed apk. `flutter build apk` will work for this, the gradle files
-   in this project have been configured to sign even debug builds.
-
-7. Upload the signed APK from step 6 to the PDC, and publish that to the alpha
-   test channel. Add your test account as an approved tester. The
-   `BillingClient` APIs won't work unless the app has been fully published to
-   the alpha channel and is being used by an authorized test account. See
-   [here](https://support.google.com/googleplay/android-developer/answer/3131213)
-   for more info.
-
-8. Sign in to the test device with the test account from step #7. Then use
-   `flutter run` to install the app to the device and test like normal.
-   
\ No newline at end of file
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/example/README.md b/packages/in_app_purchase/in_app_purchase_storekit/example/README.md
index 9cf98bf02e79..96b8bb17dbff 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/example/README.md
+++ b/packages/in_app_purchase/in_app_purchase_storekit/example/README.md
@@ -1,75 +1,9 @@
-# In App Purchase iOS Example
+# Platform Implementation Test App
 
-Demonstrates how to use the In App Purchase iOS (IAP) Plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
 
-## Getting Started
-
-### Preparation
-
-There's a significant amount of setup required for testing in app purchases
-successfully, including registering new app IDs and store entries to use for
-testing in App Store Connect. The App Store requires developers to configure 
-an app with in-app items for purchase to call their in-app-purchase APIs. 
-The App Store has extensive documentation on how to do this, and we've also 
-included a high level guide below.
-
-* [In-App Purchase (App Store)](https://developer.apple.com/in-app-purchase/)
-
-### iOS
-
-When using Xcode 12 and iOS 14 or higher you can run the example in the simulator or on a device without 
-having to configure an App in App Store Connect. The example app is set up to use StoreKit Testing configured
-in the `example/ios/Runner/Configuration.storekit` file (as documented in the article [Setting Up StoreKit Testing in Xcode](https://developer.apple.com/documentation/xcode/setting_up_storekit_testing_in_xcode?language=objc)).
-To run the application take the following steps (note that it will only work when running from Xcode):
-
-1. Open the example app with Xcode, `File > Open File` `example/ios/Runner.xcworkspace`;
-
-2. Within Xcode edit the current scheme, `Product > Scheme > Edit Scheme...` (or press `Command + Shift + ,`);
-
-3. Enable StoreKit testing:
-  a. Select the `Run` action;
-  b. Click `Options` in the action settings;
-  c. Select the `Configuration.storekit` for the StoreKit Configuration option.
-
-4. Click the `Close` button to close the scheme editor;
-
-5. Select the device you want to run the example App on;
-
-6. Run the application using `Product > Run` (or hit the run button).
-
-When testing on pre-iOS 14 you can't run the example app on a simulator and you will need to configure an app in App Store Connect. You can do so by following the steps below:
-
-1. Follow ["Workflow for configuring in-app
-   purchases"](https://help.apple.com/app-store-connect/#/devb57be10e7), a
-   detailed guide on all the steps needed to enable IAPs for an app. Complete
-   steps 1 ("Sign a Paid Applications Agreement") and 2 ("Configure in-app
-   purchases").
-
-   For step #2, "Configure in-app purchases in App Store Connect," you'll want
-   to create the following products:
-
-   - A consumable with product ID `consumable`
-   - An upgrade with product ID `upgrade`
-   - An auto-renewing subscription with product ID `subscription_silver`
-   - An non-renewing subscription with product ID `subscription_gold`
-
-2. In XCode, `File > Open File` `example/ios/Runner.xcworkspace`. Update the
-   Bundle ID to match the Bundle ID of the app created in step #1.
-
-3. [Create a Sandbox tester
-   account](https://help.apple.com/app-store-connect/#/dev8b997bee1) to test the
-   in-app purchases with.
-
-4. Use `flutter run` to install the app and test it. Note that you need to test
-   it on a real device instead of a simulator. Next click on one of the products
-   in the example App, this enables the "SANDBOX ACCOUNT" section in the iOS
-   settings. You will now be asked to sign in with your sandbox test account to
-   complete the purchase (no worries you won't be charged). If for some reason
-   you aren't asked to sign-in or the wrong user is listed, go into the iOS
-   settings ("Settings" -> "App Store" -> "SANDBOX ACCOUNT") and update your
-   sandbox account from there. This procedure is explained in great detail in
-   the [Testing In-App Purchases with Sandbox](https://developer.apple.com/documentation/storekit/in-app_purchase/testing_in-app_purchases_with_sandbox?language=objc) article.
-
-
-**Important:** signing into any production service (including iTunes!) with the
-sandbox test account will permanently invalidate it.
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/local_auth/local_auth_android/example/README.md b/packages/local_auth/local_auth_android/example/README.md
index bd004a77d86b..96b8bb17dbff 100644
--- a/packages/local_auth/local_auth_android/example/README.md
+++ b/packages/local_auth/local_auth_android/example/README.md
@@ -1,3 +1,9 @@
-# local_auth_example
+# Platform Implementation Test App
 
-Demonstrates how to use the local_auth plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/local_auth/local_auth_ios/example/README.md b/packages/local_auth/local_auth_ios/example/README.md
index bd004a77d86b..96b8bb17dbff 100644
--- a/packages/local_auth/local_auth_ios/example/README.md
+++ b/packages/local_auth/local_auth_ios/example/README.md
@@ -1,3 +1,9 @@
-# local_auth_example
+# Platform Implementation Test App
 
-Demonstrates how to use the local_auth plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/local_auth/local_auth_windows/example/README.md b/packages/local_auth/local_auth_windows/example/README.md
index 8f48b8563cad..96b8bb17dbff 100644
--- a/packages/local_auth/local_auth_windows/example/README.md
+++ b/packages/local_auth/local_auth_windows/example/README.md
@@ -1,3 +1,9 @@
-# local_auth_example
+# Platform Implementation Test App
 
-Demonstrates how to use the local_auth plugin.
\ No newline at end of file
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/path_provider/path_provider_android/example/README.md b/packages/path_provider/path_provider_android/example/README.md
index 801f44409938..96b8bb17dbff 100644
--- a/packages/path_provider/path_provider_android/example/README.md
+++ b/packages/path_provider/path_provider_android/example/README.md
@@ -1,3 +1,9 @@
-# path_provider_example
+# Platform Implementation Test App
 
-Demonstrates how to use the path_provider plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/path_provider/path_provider_ios/example/README.md b/packages/path_provider/path_provider_ios/example/README.md
index 801f44409938..96b8bb17dbff 100644
--- a/packages/path_provider/path_provider_ios/example/README.md
+++ b/packages/path_provider/path_provider_ios/example/README.md
@@ -1,3 +1,9 @@
-# path_provider_example
+# Platform Implementation Test App
 
-Demonstrates how to use the path_provider plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/path_provider/path_provider_linux/example/README.md b/packages/path_provider/path_provider_linux/example/README.md
index 333d0f55cec7..96b8bb17dbff 100644
--- a/packages/path_provider/path_provider_linux/example/README.md
+++ b/packages/path_provider/path_provider_linux/example/README.md
@@ -1,3 +1,9 @@
-# path_provider_linux_example
+# Platform Implementation Test App
 
-Demonstrates how to use the path_provider_linux plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/path_provider/path_provider_macos/example/README.md b/packages/path_provider/path_provider_macos/example/README.md
index 158869595c01..96b8bb17dbff 100644
--- a/packages/path_provider/path_provider_macos/example/README.md
+++ b/packages/path_provider/path_provider_macos/example/README.md
@@ -1,3 +1,9 @@
-# path_provider_macos_example
+# Platform Implementation Test App
 
-Demonstrates how to use the path_provider_macos plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/path_provider/path_provider_windows/example/README.md b/packages/path_provider/path_provider_windows/example/README.md
index 63723991a2e9..96b8bb17dbff 100644
--- a/packages/path_provider/path_provider_windows/example/README.md
+++ b/packages/path_provider/path_provider_windows/example/README.md
@@ -1,3 +1,9 @@
-# path_provider_windows_example
+# Platform Implementation Test App
 
-Demonstrates how to use the path_provider_windows plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/quick_actions/quick_actions_android/example/README.md b/packages/quick_actions/quick_actions_android/example/README.md
index c8a629019fc9..96b8bb17dbff 100644
--- a/packages/quick_actions/quick_actions_android/example/README.md
+++ b/packages/quick_actions/quick_actions_android/example/README.md
@@ -1,3 +1,9 @@
-# quick_actions_example
+# Platform Implementation Test App
 
-Demonstrates how to use the quick_actions plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/quick_actions/quick_actions_ios/example/README.md b/packages/quick_actions/quick_actions_ios/example/README.md
index c8a629019fc9..96b8bb17dbff 100644
--- a/packages/quick_actions/quick_actions_ios/example/README.md
+++ b/packages/quick_actions/quick_actions_ios/example/README.md
@@ -1,3 +1,9 @@
-# quick_actions_example
+# Platform Implementation Test App
 
-Demonstrates how to use the quick_actions plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/shared_preferences/shared_preferences_android/example/README.md b/packages/shared_preferences/shared_preferences_android/example/README.md
index c060637c7ec5..96b8bb17dbff 100644
--- a/packages/shared_preferences/shared_preferences_android/example/README.md
+++ b/packages/shared_preferences/shared_preferences_android/example/README.md
@@ -1,3 +1,9 @@
-# shared_preferences_example
+# Platform Implementation Test App
 
-Demonstrates how to use the shared_preferences plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/shared_preferences/shared_preferences_ios/example/README.md b/packages/shared_preferences/shared_preferences_ios/example/README.md
index c060637c7ec5..96b8bb17dbff 100644
--- a/packages/shared_preferences/shared_preferences_ios/example/README.md
+++ b/packages/shared_preferences/shared_preferences_ios/example/README.md
@@ -1,3 +1,9 @@
-# shared_preferences_example
+# Platform Implementation Test App
 
-Demonstrates how to use the shared_preferences plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/shared_preferences/shared_preferences_linux/example/README.md b/packages/shared_preferences/shared_preferences_linux/example/README.md
index c060637c7ec5..96b8bb17dbff 100644
--- a/packages/shared_preferences/shared_preferences_linux/example/README.md
+++ b/packages/shared_preferences/shared_preferences_linux/example/README.md
@@ -1,3 +1,9 @@
-# shared_preferences_example
+# Platform Implementation Test App
 
-Demonstrates how to use the shared_preferences plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/shared_preferences/shared_preferences_macos/example/README.md b/packages/shared_preferences/shared_preferences_macos/example/README.md
index c060637c7ec5..96b8bb17dbff 100644
--- a/packages/shared_preferences/shared_preferences_macos/example/README.md
+++ b/packages/shared_preferences/shared_preferences_macos/example/README.md
@@ -1,3 +1,9 @@
-# shared_preferences_example
+# Platform Implementation Test App
 
-Demonstrates how to use the shared_preferences plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/shared_preferences/shared_preferences_web/example/README.md b/packages/shared_preferences/shared_preferences_web/example/README.md
index 4348451b14e2..0e51ae5ecbd2 100644
--- a/packages/shared_preferences/shared_preferences_web/example/README.md
+++ b/packages/shared_preferences/shared_preferences_web/example/README.md
@@ -1,4 +1,14 @@
-# Testing
+# Platform Implementation Test App
+
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
+
+## Testing
 
 This package uses `package:integration_test` to run its tests in a web browser.
 
diff --git a/packages/shared_preferences/shared_preferences_windows/example/README.md b/packages/shared_preferences/shared_preferences_windows/example/README.md
index 30c7f7e50c3b..96b8bb17dbff 100644
--- a/packages/shared_preferences/shared_preferences_windows/example/README.md
+++ b/packages/shared_preferences/shared_preferences_windows/example/README.md
@@ -1,3 +1,9 @@
-# shared_preferences_windows_example
+# Platform Implementation Test App
 
-Demonstrates how to use the shared_preferences_windows plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/url_launcher/url_launcher_android/example/README.md b/packages/url_launcher/url_launcher_android/example/README.md
index 35b4bdb7031e..96b8bb17dbff 100644
--- a/packages/url_launcher/url_launcher_android/example/README.md
+++ b/packages/url_launcher/url_launcher_android/example/README.md
@@ -1,3 +1,9 @@
-# url_launcher_example
+# Platform Implementation Test App
 
-Demonstrates how to use the url_launcher plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/url_launcher/url_launcher_ios/example/README.md b/packages/url_launcher/url_launcher_ios/example/README.md
index 35b4bdb7031e..96b8bb17dbff 100644
--- a/packages/url_launcher/url_launcher_ios/example/README.md
+++ b/packages/url_launcher/url_launcher_ios/example/README.md
@@ -1,3 +1,9 @@
-# url_launcher_example
+# Platform Implementation Test App
 
-Demonstrates how to use the url_launcher plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/url_launcher/url_launcher_linux/example/README.md b/packages/url_launcher/url_launcher_linux/example/README.md
index 35b4bdb7031e..96b8bb17dbff 100644
--- a/packages/url_launcher/url_launcher_linux/example/README.md
+++ b/packages/url_launcher/url_launcher_linux/example/README.md
@@ -1,3 +1,9 @@
-# url_launcher_example
+# Platform Implementation Test App
 
-Demonstrates how to use the url_launcher plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/url_launcher/url_launcher_macos/example/README.md b/packages/url_launcher/url_launcher_macos/example/README.md
index 35b4bdb7031e..96b8bb17dbff 100644
--- a/packages/url_launcher/url_launcher_macos/example/README.md
+++ b/packages/url_launcher/url_launcher_macos/example/README.md
@@ -1,3 +1,9 @@
-# url_launcher_example
+# Platform Implementation Test App
 
-Demonstrates how to use the url_launcher plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/url_launcher/url_launcher_web/example/README.md b/packages/url_launcher/url_launcher_web/example/README.md
index 3cdecfab2ab9..0e51ae5ecbd2 100644
--- a/packages/url_launcher/url_launcher_web/example/README.md
+++ b/packages/url_launcher/url_launcher_web/example/README.md
@@ -1,4 +1,14 @@
-# Testing
+# Platform Implementation Test App
+
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
+
+## Testing
 
 This package uses `package:integration_test` to run its tests in a web browser.
 
@@ -7,6 +17,3 @@ in the Flutter wiki for instructions to setup and run the tests in this package.
 
 Check [flutter.dev > Integration testing](https://flutter.dev/docs/testing/integration-tests)
 for more info.
-
-See [Plugin Tests > Web Tests > Mocks](https://github.com/flutter/flutter/wiki/Plugin-Tests#mocks)
-in the Flutter wiki for more information about the `.mocks.dart` files in this package.
\ No newline at end of file
diff --git a/packages/url_launcher/url_launcher_windows/example/README.md b/packages/url_launcher/url_launcher_windows/example/README.md
index e444852697b9..96b8bb17dbff 100644
--- a/packages/url_launcher/url_launcher_windows/example/README.md
+++ b/packages/url_launcher/url_launcher_windows/example/README.md
@@ -1,3 +1,9 @@
-# url_launcher_windows_example
+# Platform Implementation Test App
 
-Demonstrates the url_launcher_windows plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/video_player/video_player_android/example/README.md b/packages/video_player/video_player_android/example/README.md
index f5974e947c00..96b8bb17dbff 100644
--- a/packages/video_player/video_player_android/example/README.md
+++ b/packages/video_player/video_player_android/example/README.md
@@ -1,3 +1,9 @@
-# video_player_example
+# Platform Implementation Test App
 
-Demonstrates how to use the video_player plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/video_player/video_player_avfoundation/example/README.md b/packages/video_player/video_player_avfoundation/example/README.md
index f5974e947c00..96b8bb17dbff 100644
--- a/packages/video_player/video_player_avfoundation/example/README.md
+++ b/packages/video_player/video_player_avfoundation/example/README.md
@@ -1,3 +1,9 @@
-# video_player_example
+# Platform Implementation Test App
 
-Demonstrates how to use the video_player plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/video_player/video_player_web/example/README.md b/packages/video_player/video_player_web/example/README.md
index 8a6e74b107ea..0e51ae5ecbd2 100644
--- a/packages/video_player/video_player_web/example/README.md
+++ b/packages/video_player/video_player_web/example/README.md
@@ -1,4 +1,14 @@
-# Testing
+# Platform Implementation Test App
+
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
+
+## Testing
 
 This package uses `package:integration_test` to run its tests in a web browser.
 
@@ -6,4 +16,4 @@ See [Plugin Tests > Web Tests](https://github.com/flutter/flutter/wiki/Plugin-Te
 in the Flutter wiki for instructions to setup and run the tests in this package.
 
 Check [flutter.dev > Integration testing](https://flutter.dev/docs/testing/integration-tests)
-for more info.
\ No newline at end of file
+for more info.
diff --git a/packages/webview_flutter/webview_flutter_android/example/README.md b/packages/webview_flutter/webview_flutter_android/example/README.md
index e5bd6e20db63..96b8bb17dbff 100644
--- a/packages/webview_flutter/webview_flutter_android/example/README.md
+++ b/packages/webview_flutter/webview_flutter_android/example/README.md
@@ -1,3 +1,9 @@
-# webview_flutter_example
+# Platform Implementation Test App
 
-Demonstrates how to use the webview_flutter plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/webview_flutter/webview_flutter_web/example/README.md b/packages/webview_flutter/webview_flutter_web/example/README.md
index e5bd6e20db63..96b8bb17dbff 100644
--- a/packages/webview_flutter/webview_flutter_web/example/README.md
+++ b/packages/webview_flutter/webview_flutter_web/example/README.md
@@ -1,3 +1,9 @@
-# webview_flutter_example
+# Platform Implementation Test App
 
-Demonstrates how to use the webview_flutter plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/example/README.md b/packages/webview_flutter/webview_flutter_wkwebview/example/README.md
index e5bd6e20db63..96b8bb17dbff 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/example/README.md
+++ b/packages/webview_flutter/webview_flutter_wkwebview/example/README.md
@@ -1,3 +1,9 @@
-# webview_flutter_example
+# Platform Implementation Test App
 
-Demonstrates how to use the webview_flutter plugin.
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
diff --git a/script/tool/CHANGELOG.md b/script/tool/CHANGELOG.md
index 8dbb4840a672..f6dfb0e58266 100644
--- a/script/tool/CHANGELOG.md
+++ b/script/tool/CHANGELOG.md
@@ -1,3 +1,9 @@
+## NEXT
+
+* Adds `readme-check` validation that the example/README.md for a federated
+  plugin's implementation packages has a warning about the intended use of the
+  example instead of the template boilerplate.
+
 ## 0.10.0
 
 * Improves the logic in `version-check` to determine what changes don't require
diff --git a/script/tool/lib/src/readme_check_command.dart b/script/tool/lib/src/readme_check_command.dart
index 4acf997a0085..e3fbc7bc454d 100644
--- a/script/tool/lib/src/readme_check_command.dart
+++ b/script/tool/lib/src/readme_check_command.dart
@@ -104,11 +104,8 @@ class ReadmeCheckCommand extends PackageLoopingCommand {
       errors.add(blockValidationError);
     }
 
-    if (_containsTemplateBoilerplate(readmeLines)) {
-      printError('${indentation}The boilerplate section about getting started '
-          'with Flutter should not be left in.');
-      errors.add('Contains template boilerplate');
-    }
+    errors.addAll(_validateBoilerplate(readmeLines,
+        mainPackage: mainPackage, isExample: isExample));
 
     // Check if this is the main readme for a plugin, and if so enforce extra
     // checks.
@@ -284,10 +281,63 @@ ${indentation * 2}Please use standard capitalizations: ${sortedListString(expect
     return null;
   }
 
-  /// Returns true if the README still has the boilerplate from the
-  /// `flutter create` templates.
-  bool _containsTemplateBoilerplate(List<String> readmeLines) {
+  /// Validates [readmeLines], outputing error messages for any issue and
+  /// returning an array of error summaries (if any).
+  ///
+  /// Returns an empty array if validation passes.
+  List<String> _validateBoilerplate(
+    List<String> readmeLines, {
+    required RepositoryPackage mainPackage,
+    required bool isExample,
+  }) {
+    final List<String> errors = <String>[];
+
+    if (_containsTemplateFlutterBoilerplate(readmeLines)) {
+      printError('${indentation}The boilerplate section about getting started '
+          'with Flutter should not be left in.');
+      errors.add('Contains template boilerplate');
+    }
+
+    // Enforce a repository-standard message in implementation plugin examples,
+    // since they aren't typical examples, which has been a source of
+    // confusion for plugin clients who find them.
+    if (isExample && mainPackage.isPlatformImplementation) {
+      if (_containsExampleBoilerplate(readmeLines)) {
+        printError('${indentation}The boilerplate should not be left in for a '
+            "federated plugin implementation package's example.");
+        errors.add('Contains template boilerplate');
+      }
+      if (!_containsImplementationExampleExplanation(readmeLines)) {
+        printError('${indentation}The example README for a platform '
+            'implementation package should warn readers about its intended '
+            'use. Please copy the example README from another implementation '
+            'package in this repository.');
+        errors.add('Missing implementation package example warning');
+      }
+    }
+
+    return errors;
+  }
+
+  /// Returns true if the README still has unwanted parts of the boilerplate
+  /// from the `flutter create` templates.
+  bool _containsTemplateFlutterBoilerplate(List<String> readmeLines) {
     return readmeLines.any((String line) =>
         line.contains('For help getting started with Flutter'));
   }
+
+  /// Returns true if the README still has the generic description of an
+  /// example from the `flutter create` templates.
+  bool _containsExampleBoilerplate(List<String> readmeLines) {
+    return readmeLines
+        .any((String line) => line.contains('Demonstrates how to use the'));
+  }
+
+  /// Returns true if the README contains the repository-standard explanation of
+  /// the purpose of a federated plugin implementation's example.
+  bool _containsImplementationExampleExplanation(List<String> readmeLines) {
+    return readmeLines.contains('# Platform Implementation Test App') &&
+        readmeLines
+            .any((String line) => line.contains('This is a test app for'));
+  }
 }
diff --git a/script/tool/test/readme_check_command_test.dart b/script/tool/test/readme_check_command_test.dart
index 37224fddc56b..eb2b6c8e7512 100644
--- a/script/tool/test/readme_check_command_test.dart
+++ b/script/tool/test/readme_check_command_test.dart
@@ -176,6 +176,147 @@ samples, guidance on mobile development, and a full API reference.
     );
   });
 
+  test(
+      'fails when a plugin implementation package example README has the '
+      'template boilerplate', () async {
+    final RepositoryPackage package = createFakePlugin(
+        'a_plugin_ios', packagesDir.childDirectory('a_plugin'));
+    package.getExamples().first.readmeFile.writeAsStringSync('''
+# a_plugin_ios_example
+
+Demonstrates how to use the a_plugin_ios plugin.
+''');
+
+    Error? commandError;
+    final List<String> output = await runCapturingPrint(
+        runner, <String>['readme-check'], errorHandler: (Error e) {
+      commandError = e;
+    });
+
+    expect(commandError, isA<ToolExit>());
+    expect(
+      output,
+      containsAllInOrder(<Matcher>[
+        contains('The boilerplate should not be left in for a federated plugin '
+            "implementation package's example."),
+        contains('Contains template boilerplate'),
+      ]),
+    );
+  });
+
+  test(
+      'allows the template boilerplate in the example README for packages '
+      'other than plugin implementation packages', () async {
+    final RepositoryPackage package = createFakePlugin(
+      'a_plugin',
+      packagesDir.childDirectory('a_plugin'),
+      platformSupport: <String, PlatformDetails>{
+        platformAndroid: const PlatformDetails(PlatformSupport.inline),
+      },
+    );
+    // Write a README with an OS support table so that the main README check
+    // passes.
+    package.readmeFile.writeAsStringSync('''
+# a_plugin
+
+|                | Android |
+|----------------|---------|
+| **Support**    | SDK 19+ |
+
+A great plugin.
+''');
+    package.getExamples().first.readmeFile.writeAsStringSync('''
+# a_plugin_example
+
+Demonstrates how to use the a_plugin plugin.
+''');
+
+    final List<String> output =
+        await runCapturingPrint(runner, <String>['readme-check']);
+
+    expect(
+      output,
+      containsAll(<Matcher>[
+        contains('  Checking README.md...'),
+        contains('  Checking example/README.md...'),
+      ]),
+    );
+  });
+
+  test(
+      'fails when a plugin implementation package example README does not have '
+      'the repo-standard message', () async {
+    final RepositoryPackage package = createFakePlugin(
+        'a_plugin_ios', packagesDir.childDirectory('a_plugin'));
+    package.getExamples().first.readmeFile.writeAsStringSync('''
+# a_plugin_ios_example
+
+Some random description.
+''');
+
+    Error? commandError;
+    final List<String> output = await runCapturingPrint(
+        runner, <String>['readme-check'], errorHandler: (Error e) {
+      commandError = e;
+    });
+
+    expect(commandError, isA<ToolExit>());
+    expect(
+      output,
+      containsAllInOrder(<Matcher>[
+        contains('The example README for a platform implementation package '
+            'should warn readers about its intended use. Please copy the '
+            'example README from another implementation package in this '
+            'repository.'),
+        contains('Missing implementation package example warning'),
+      ]),
+    );
+  });
+
+  test('passes for a plugin implementation package with the expected content',
+      () async {
+    final RepositoryPackage package = createFakePlugin(
+      'a_plugin',
+      packagesDir.childDirectory('a_plugin'),
+      platformSupport: <String, PlatformDetails>{
+        platformAndroid: const PlatformDetails(PlatformSupport.inline),
+      },
+    );
+    // Write a README with an OS support table so that the main README check
+    // passes.
+    package.readmeFile.writeAsStringSync('''
+# a_plugin
+
+|                | Android |
+|----------------|---------|
+| **Support**    | SDK 19+ |
+
+A great plugin.
+''');
+    package.getExamples().first.readmeFile.writeAsStringSync('''
+# Platform Implementation Test App
+
+This is a test app for manual testing and automated integration testing
+of this platform implementation. It is not intended to demonstrate actual use of
+this package, since the intent is that plugin clients use the app-facing
+package.
+
+Unless you are making changes to this implementation package, this example is
+very unlikely to be relevant.
+''');
+
+    final List<String> output =
+        await runCapturingPrint(runner, <String>['readme-check']);
+
+    expect(
+      output,
+      containsAll(<Matcher>[
+        contains('  Checking README.md...'),
+        contains('  Checking example/README.md...'),
+      ]),
+    );
+  });
+
   test(
       'fails when multi-example top-level example directory README still has '
       'application template boilerplate', () async {