feat: register flutter-fire-ai and flutter-fire-dc platform versions and fix web late registration

packages/firebase_ai/firebase_ai/android/build.gradle

@@ -21,6 +21,24 @@ buildscript {
     }
 }
 
+repositories {
+    google()
+    mavenCentral()
+}
+
+def firebaseCoreProject = findProject(':firebase_core')
+if (firebaseCoreProject == null) {
+  throw new GradleException('Could not find the firebase_core FlutterFire plugin, have you added it as a dependency in your pubspec?')
+} else if (!firebaseCoreProject.properties['FirebaseSDKVersion']) {
+  throw new GradleException('A newer version of the firebase_core FlutterFire plugin is required, please update your firebase_core pubspec dependency.')
+}
+
+def getRootProjectExtOrCoreProperty(name, firebaseCoreProject) {
+  if (!rootProject.ext.has('FlutterFire')) return firebaseCoreProject.properties[name]
+  if (!rootProject.ext.get('FlutterFire')[name]) return firebaseCoreProject.properties[name]
+  return rootProject.ext.get('FlutterFire').get(name)
+}
+
 android {
     if (project.android.hasProperty("namespace")) {
       namespace 'io.flutter.plugins.firebase.ai'
@@ -41,9 +59,20 @@ android {
         main.java.srcDirs += "src/main/kotlin"
     }
 
+    buildFeatures {
+        buildConfig = true
+    }
+
     lintOptions {
         disable 'InvalidPackage'
     }
+
+    dependencies {
+        api firebaseCoreProject
+        implementation platform("com.google.firebase:firebase-bom:${getRootProjectExtOrCoreProperty("FirebaseSDKVersion", firebaseCoreProject)}")
+        implementation 'com.google.firebase:firebase-common'
+        implementation 'androidx.annotation:annotation:1.7.0'
+    }
 }
 
 plugins.withId("org.jetbrains.kotlin.android") {
@@ -53,3 +82,5 @@ plugins.withId("org.jetbrains.kotlin.android") {
     }
   }
 }
+
+apply from: file("./user-agent.gradle")

packages/firebase_ai/firebase_ai/android/src/main/AndroidManifest.xml

@@ -1,3 +1,9 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="io.flutter.plugins.firebase.ai">
+    <application>
+        <service android:name="com.google.firebase.components.ComponentDiscoveryService">
+            <meta-data android:name="com.google.firebase.components:io.flutter.plugins.firebase.ai.FlutterFirebaseAppRegistrar"
+                       android:value="com.google.firebase.components.ComponentRegistrar" />
+        </service>
+    </application>
 </manifest>

packages/firebase_ai/firebase_ai/android/src/main/kotlin/io/flutter/plugins/firebase/ai/FlutterFirebaseAppRegistrar.kt

@@ -0,0 +1,28 @@
+// 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.
+
+package io.flutter.plugins.firebase.ai
+
+import androidx.annotation.Keep
+import com.google.firebase.components.Component
+import com.google.firebase.components.ComponentRegistrar
+import com.google.firebase.platforminfo.LibraryVersionComponent
+
+@Keep
+class FlutterFirebaseAppRegistrar : ComponentRegistrar {
+  override fun getComponents(): List<Component<*>> {
+    return listOf(
+        LibraryVersionComponent.create(BuildConfig.LIBRARY_NAME, BuildConfig.LIBRARY_VERSION))
+  }
+}

packages/firebase_ai/firebase_ai/android/user-agent.gradle

@@ -0,0 +1,22 @@
+import java.util.regex.Matcher
+import java.util.regex.Pattern
+
+String libraryVersionName = "UNKNOWN"
+String libraryName = "flutter-fire-ai"
+File pubspec = new File(project.projectDir.parentFile,  'pubspec.yaml')
+
+if (pubspec.exists()) {
+  String yaml = pubspec.text
+  // Using \s*['|"]?([^\n|'|"]*)['|"]? to extract version number.
+  Matcher versionMatcher = Pattern.compile("^version:\\s*['|\"]?([^\\n|'|\"]*)['|\"]?\$", Pattern.MULTILINE).matcher(yaml)
+  if (versionMatcher.find()) libraryVersionName = versionMatcher.group(1).replaceAll("\\+", "-")
+}
+
+android {
+  defaultConfig {
+    // BuildConfig.VERSION_NAME
+    buildConfigField 'String', 'LIBRARY_VERSION', "\"${libraryVersionName}\""
+    // BuildConfig.LIBRARY_NAME
+    buildConfigField 'String', 'LIBRARY_NAME', "\"${libraryName}\""
+  }
+}

packages/firebase_ai/firebase_ai/ios/firebase_ai/Sources/firebase_ai/Constants.swift

@@ -0,0 +1,16 @@
+// 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.
+
+/// Auto-generated file. Do not edit.
+public let versionNumber = "5.0.0"

packages/firebase_ai/firebase_ai/ios/firebase_ai/Sources/firebase_ai/FirebaseAIPlugin.swift

@@ -32,6 +32,17 @@ public class FirebaseAIPlugin: NSObject, FlutterPlugin {
     )
     let instance = FirebaseAIPlugin()
     registrar.addMethodCallDelegate(instance, channel: channel)
+
+    let selector = NSSelectorFromString("registerLibrary:withVersion:")
+    if let firAppClass = NSClassFromString("FIRApp") as? NSObject.Type,
+      firAppClass.responds(to: selector)
+    {
+      _ = firAppClass.perform(
+        selector,
+        with: "flutter-fire-ai",
+        with: versionNumber
+      )
+    }
   }
 
   public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {

packages/firebase_ai/firebase_ai/lib/src/firebase_ai.dart

@@ -22,6 +22,9 @@ import 'package:meta/meta.dart';
 
 import '../firebase_ai.dart';
 import 'base_model.dart';
+import 'firebaseai_version.dart';
+import 'platform_version_stub.dart'
+    if (dart.library.js_interop) 'platform_version_web.dart';
 
 const _defaultVertexAILocation = 'us-central1';
 const _defaultAgentPlatformLocation = 'global';
@@ -36,7 +39,9 @@ class FirebaseAI extends FirebasePlugin {
     this.auth,
     this.useLimitedUseAppCheckTokens = false,
   })  : _useAgentPlatform = useAgentPlatform,
-        super(app.name, 'plugins.flutter.io/firebase_vertexai');
+        super(app.name, 'plugins.flutter.io/firebase_vertexai') {
+    registerWebLibraryVersion('flutter-fire-ai', packageVersion);
+  }
 
   /// The [FirebaseApp] for this current [FirebaseAI] instance.
   FirebaseApp app;

packages/firebase_ai/firebase_ai/lib/src/platform_version_stub.dart

@@ -0,0 +1,16 @@
+// 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.
+
+/// Stub implementation of [registerWebLibraryVersion] on non-web platforms.
+void registerWebLibraryVersion(String libraryName, String version) {}

packages/firebase_ai/firebase_ai/lib/src/platform_version_web.dart

@@ -0,0 +1,40 @@
+// 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 'dart:js_interop';
+import 'dart:js_interop_unsafe';
+
+bool _registered = false;
+
+/// Registers [libraryName] and [version] with the Firebase Web JS SDK.
+void registerWebLibraryVersion(String libraryName, String version) {
+  if (_registered) return;
+  try {
+    final core = globalContext.getProperty('firebase_core'.toJS) as JSObject?;
+    if (core != null && core.hasProperty('registerVersion'.toJS).toDart) {
+      final storage =
+          globalContext.getProperty('sessionStorage'.toJS) as JSObject?;
+      final key = 'flutterfire-$libraryName-$version'.toJS;
+      if (storage?.callMethod<JSAny?>('getItem'.toJS, key) == null) {
+        storage?.callMethod<JSAny?>('setItem'.toJS, key, version.toJS);
+        core.callMethod<JSAny?>(
+          'registerVersion'.toJS,
+          libraryName.toJS,
+          version.toJS,
+        );
+      }
+      _registered = true;
+    }
+  } catch (_) {}
+}

packages/firebase_ai/firebase_ai/macos/firebase_ai/Sources/firebase_ai/Constants.swift

@@ -0,0 +1 @@
+../../../../ios/firebase_ai/Sources/firebase_ai/Constants.swift

packages/firebase_core/firebase_core_web/lib/src/firebase_core_web.dart

@@ -87,6 +87,9 @@ class FirebaseCoreWeb extends FirebasePlatform {
 
   static void registerLibraryVersion(String libraryName, String version) {
     _libraryVersions[libraryName] = version;
+    if (globalContext.getProperty('firebase_core'.toJS) != null) {
+      _registerVersionIfNeeded(libraryName, version);
+    }
   }
 
   static void _registerAllLibraryVersions() {

packages/firebase_core/firebase_core_web/test/firebase_core_web_late_registration_test.dart

@@ -0,0 +1,88 @@
+// Copyright 2026 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+@TestOn('browser')
+library;
+
+import 'dart:js_interop';
+import 'dart:js_interop_unsafe';
+
+import 'package:firebase_core_platform_interface/firebase_core_platform_interface.dart';
+import 'package:firebase_core_web/firebase_core_web.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:web/web.dart' as web;
+
+String _getPlatformInfoString() {
+  final core = globalContext.getProperty<JSObject>('firebase_core'.toJS);
+  final jsApp = core.callMethod<JSObject>('getApp'.toJS);
+  final container = jsApp.getProperty<JSObject>('container'.toJS);
+  final provider = container.callMethod<JSObject>(
+    'getProvider'.toJS,
+    'platform-logger'.toJS,
+  );
+  final logger = provider.callMethod<JSObject>('getImmediate'.toJS);
+  return logger.callMethod<JSString>('getPlatformInfoString'.toJS).toDart;
+}
+
+void main() {
+  group('FirebaseCoreWeb late library version registration', () {
+    setUp(() {
+      FirebasePlatform.instance = FirebaseCoreWeb();
+      web.window.sessionStorage.clear();
+    });
+
+    test(
+      'registers library version with PlatformLogger when called after initializeApp',
+      () async {
+        const options = FirebaseOptions(
+          apiKey: 'fake-api-key',
+          appId: '1:1234567890:web:fake',
+          messagingSenderId: '1234567890',
+          projectId: 'fake-project',
+          authDomain: 'fake-project.firebaseapp.com',
+        );
+
+        await FirebasePlatform.instance.initializeApp(options: options);
+
+        final initialPlatformInfo = _getPlatformInfoString();
+        expect(initialPlatformInfo, contains('flutter-fire-core/'));
+        expect(
+          initialPlatformInfo,
+          isNot(contains('flutter-fire-late-test/1.2.3')),
+        );
+
+        FirebaseCoreWeb.registerLibraryVersion(
+          'flutter-fire-late-test',
+          '1.2.3',
+        );
+
+        expect(
+          web.window.sessionStorage
+              .getItem('flutterfire-flutter-fire-late-test-1.2.3'),
+          '1.2.3',
+        );
+        expect(
+          _getPlatformInfoString(),
+          contains('flutter-fire-late-test/1.2.3'),
+        );
+
+        // Clearing sessionStorage allows re-registering a subsequent version.
+        web.window.sessionStorage.clear();
+        FirebaseCoreWeb.registerLibraryVersion(
+          'flutter-fire-late-test-2',
+          '2.0.0',
+        );
+        expect(
+          web.window.sessionStorage
+              .getItem('flutterfire-flutter-fire-late-test-2-2.0.0'),
+          '2.0.0',
+        );
+        expect(
+          _getPlatformInfoString(),
+          contains('flutter-fire-late-test-2/2.0.0'),
+        );
+      },
+    );
+  });
+}

packages/firebase_data_connect/firebase_data_connect/lib/src/firebase_data_connect.dart

@@ -20,11 +20,14 @@ import 'package:firebase_data_connect/src/common/common_library.dart';
 import 'package:firebase_data_connect/src/core/ref.dart';
 import 'package:flutter/foundation.dart';
 
+import './network/hot_restart_guard_stub.dart'
+    if (dart.library.js_interop) './network/hot_restart_guard_web.dart';
 import './network/rest_library.dart';
 import './network/transport_library.dart';
 
 import 'cache/cache_data_types.dart';
 import 'cache/cache.dart';
+import 'dataconnect_version.dart';
 
 /// DataConnect class
 class FirebaseDataConnect extends FirebasePlugin {
@@ -48,6 +51,7 @@ class FirebaseDataConnect extends FirebasePlugin {
           connectorConfig.serviceId,
         ),
         super(app.name, 'plugins.flutter.io/firebase_data_connect') {
+    registerWebLibraryVersion('flutter-fire-dc', packageVersion);
     _queryManager = QueryManager(this);
     if (sdkType != null) {
       _sdkType = sdkType;

packages/firebase_data_connect/firebase_data_connect/lib/src/network/hot_restart_guard_stub.dart

@@ -17,3 +17,5 @@ String? claimDataConnectWebSocketTransport(String key) => null;
 bool isCurrentDataConnectWebSocketTransport(String key, String? token) => true;
 
 void releaseDataConnectWebSocketTransport(String key, String? token) {}
+
+void registerWebLibraryVersion(String libraryName, String version) {}

packages/firebase_data_connect/firebase_data_connect/lib/src/network/hot_restart_guard_web.dart

@@ -48,3 +48,26 @@ void releaseDataConnectWebSocketTransport(String key, String? token) {
     globalContext.delete(key.toJS);
   }
 }
+
+bool _registered = false;
+
+void registerWebLibraryVersion(String libraryName, String version) {
+  if (_registered) return;
+  try {
+    final core = globalContext.getProperty('firebase_core'.toJS) as JSObject?;
+    if (core != null && core.hasProperty('registerVersion'.toJS).toDart) {
+      final storage =
+          globalContext.getProperty('sessionStorage'.toJS) as JSObject?;
+      final key = 'flutterfire-$libraryName-$version'.toJS;
+      if (storage?.callMethod<JSAny?>('getItem'.toJS, key) == null) {
+        storage?.callMethod<JSAny?>('setItem'.toJS, key, version.toJS);
+        core.callMethod<JSAny?>(
+          'registerVersion'.toJS,
+          libraryName.toJS,
+          version.toJS,
+        );
+      }
+      _registered = true;
+    }
+  } catch (_) {}
+}

scripts/generate_versions_spm.dart

@@ -118,6 +118,7 @@ void updateLibraryVersionPureSwiftPlugins() {
     'firebase_in_app_messaging',
     'firebase_crashlytics',
     'firebase_core',
+    'firebase_ai',
   ];
 
   for (final package in packages) {