diff --git a/packages/flutterfire_cli/bin/flutterfire.dart b/packages/flutterfire_cli/bin/flutterfire.dart
index 40248161..642e5ec6 100755
--- a/packages/flutterfire_cli/bin/flutterfire.dart
+++ b/packages/flutterfire_cli/bin/flutterfire.dart
@@ -18,6 +18,7 @@
 
 import 'dart:io';
 
+import 'package:flutterfire_cli/flutterfire_cli.dart';
 import 'package:flutterfire_cli/src/command_runner.dart';
 import 'package:flutterfire_cli/src/common/strings.dart';
 import 'package:flutterfire_cli/src/common/utils.dart' as utils;
@@ -54,13 +55,52 @@ Future<void> main(List<String> arguments) async {
 
   try {
     FlutterApp? flutterApp;
+    // Parse custom flags that we handle ourselves before passing to the command runner.
+    // These flags are not registered options in the command runner, so we extract them here.
+    //
+    // Supported custom flags:
+    // --cwd=<path>                    Target Flutter project directory
+    // --firebase-executable=<exe>    Custom Firebase CLI executable (e.g., 'node')
+    // --firebase-base-args=<args>    Comma-separated base args for Firebase CLI
+    // --firebase-workdir=<path>      Working directory for Firebase CLI commands
+    String? cwdArg;
+    String? firebaseExecutable;
+    String? firebaseBaseArgs;
+    String? firebaseWorkdir;
+    final filteredArgs = <String>[];
+
+    for (final arg in arguments) {
+      if (arg.startsWith('--cwd=')) {
+        cwdArg = arg.substring(6);
+      } else if (arg.startsWith('--firebase-executable=')) {
+        firebaseExecutable = arg.substring(22);
+      } else if (arg.startsWith('--firebase-base-args=')) {
+        firebaseBaseArgs = arg.substring(21);
+      } else if (arg.startsWith('--firebase-workdir=')) {
+        firebaseWorkdir = arg.substring(19);
+      } else {
+        filteredArgs.add(arg);
+      }
+    }
+
+    // Configure custom Firebase CLI if specified.
+    // This allows using a forked/custom Firebase CLI instead of the system's 'firebase' command.
+    if (firebaseExecutable != null || firebaseBaseArgs != null || firebaseWorkdir != null) {
+      globalFirebaseCliConfig = FirebaseCliConfig(
+        executable: firebaseExecutable ?? 'firebase',
+        baseArgs: firebaseBaseArgs?.split(',') ?? const [],
+        workingDirectory: firebaseWorkdir,
+      );
+    }
+
     // upload-crashlytics-symbols & bundle-service-file scripts are ran from Xcode environment
-    if (!arguments.contains('upload-crashlytics-symbols') &&
-        !arguments.contains('bundle-service-file')) {
-      flutterApp = await FlutterApp.load(Directory.current);
+    if (!filteredArgs.contains('upload-crashlytics-symbols') &&
+        !filteredArgs.contains('bundle-service-file')) {
+      final projectDir = cwdArg != null ? Directory(cwdArg) : Directory.current;
+      flutterApp = await FlutterApp.load(projectDir);
     }
 
-    await FlutterFireCommandRunner(flutterApp).run(arguments);
+    await FlutterFireCommandRunner(flutterApp).run(filteredArgs);
   } on FlutterFireException catch (err) {
     if (utils.activeSpinnerState != null) {
       try {
diff --git a/packages/flutterfire_cli/lib/flutterfire_cli.dart b/packages/flutterfire_cli/lib/flutterfire_cli.dart
index 1eeb0db1..da8b2209 100644
--- a/packages/flutterfire_cli/lib/flutterfire_cli.dart
+++ b/packages/flutterfire_cli/lib/flutterfire_cli.dart
@@ -16,3 +16,11 @@
  */
 
 export 'src/common/strings.dart' show FlutterFireException;
+export 'src/common/utils.dart' show writeToFirebaseJson;
+export 'src/firebase.dart'
+    show FirebaseCliConfig, globalFirebaseCliConfig;
+export 'src/firebase/firebase_dart_configuration_write.dart'
+    show FirebaseDartConfigurationWrite;
+export 'src/firebase/firebase_platform_options.dart'
+    show FirebasePlatformOptions, fetchAllFirebaseOptions;
+export 'src/flutter_app.dart' show FlutterApp;
diff --git a/packages/flutterfire_cli/lib/src/commands/config.dart b/packages/flutterfire_cli/lib/src/commands/config.dart
index 5b2b5d19..ff125a94 100644
--- a/packages/flutterfire_cli/lib/src/commands/config.dart
+++ b/packages/flutterfire_cli/lib/src/commands/config.dart
@@ -565,6 +565,9 @@ class ConfigCommand extends FlutterFireCommand {
   Future<void> run() async {
     // Has to set during `run()` otherwise `argResults` will be null
     updateDebugMode(argResults!['debug'] as bool);
+    // Set non-interactive mode if --yes flag was passed.
+    // This causes the CLI to fail with errors instead of prompting.
+    setNonInteractiveMode(yes);
     try {
       commandRequiresFlutterApp();
       final reconfigured = await checkIfUserRequiresReconfigure();
diff --git a/packages/flutterfire_cli/lib/src/common/prompts/android_prompts.dart b/packages/flutterfire_cli/lib/src/common/prompts/android_prompts.dart
index 70a70370..7a0cff91 100644
--- a/packages/flutterfire_cli/lib/src/common/prompts/android_prompts.dart
+++ b/packages/flutterfire_cli/lib/src/common/prompts/android_prompts.dart
@@ -29,7 +29,7 @@ String getAndroidServiceFile({
       );
     }
   } else {
-    if (isCI) {
+    if (shouldFailInsteadOfPrompt) {
       throw ValidationException(
         kAndroid,
         'The path: $serviceFilePath is not a valid path for the Android `google-services.json` file. Please re-run the command with a valid path.',
diff --git a/packages/flutterfire_cli/lib/src/common/prompts/apple_prompts.dart b/packages/flutterfire_cli/lib/src/common/prompts/apple_prompts.dart
index 538f8c88..78704dd3 100644
--- a/packages/flutterfire_cli/lib/src/common/prompts/apple_prompts.dart
+++ b/packages/flutterfire_cli/lib/src/common/prompts/apple_prompts.dart
@@ -50,7 +50,7 @@ Future<String> promptCheckBuildConfiguration(
   );
 
   if (!buildConfigurations.contains(buildConfiguration)) {
-    if (isCI) {
+    if (shouldFailInsteadOfPrompt) {
       throw ValidationException(
         platform,
         'The build configuration: $buildConfiguration does not exist. Please re-run the command with a valid build configuration.',
@@ -97,7 +97,7 @@ Future<String> promptCheckTarget(String target, String platform) async {
       await findTargetsAvailable(platform, getXcodeProjectPath(platform));
 
   if (!targets.contains(target)) {
-    if (isCI) {
+    if (shouldFailInsteadOfPrompt) {
       throw ValidationException(
         platform,
         'The target $target does not exist. Please re-run the command with a valid target.',
diff --git a/packages/flutterfire_cli/lib/src/common/prompts/dart_file_prompts.dart b/packages/flutterfire_cli/lib/src/common/prompts/dart_file_prompts.dart
index 382a6b7b..92acf0c4 100644
--- a/packages/flutterfire_cli/lib/src/common/prompts/dart_file_prompts.dart
+++ b/packages/flutterfire_cli/lib/src/common/prompts/dart_file_prompts.dart
@@ -43,7 +43,7 @@ bool promptWriteConfigurationFile({
   final outputFile = File(configurationFilePath);
   final fileExists = outputFile.existsSync();
 
-  if (!fileExists || isCI) {
+  if (!fileExists || shouldFailInsteadOfPrompt) {
     return true;
   } else {
     final shouldOverwrite = promptBool(
diff --git a/packages/flutterfire_cli/lib/src/common/utils.dart b/packages/flutterfire_cli/lib/src/common/utils.dart
index b99caf47..2f0e85c9 100644
--- a/packages/flutterfire_cli/lib/src/common/utils.dart
+++ b/packages/flutterfire_cli/lib/src/common/utils.dart
@@ -100,6 +100,23 @@ bool get isCI {
   return ci.isCI;
 }
 
+/// Flag to indicate non-interactive mode (e.g., when --yes is passed).
+/// When true, the CLI should fail with an error instead of prompting for input.
+/// This is set by the config command when --yes flag is used.
+bool _isNonInteractive = false;
+
+/// Sets the non-interactive mode flag.
+/// Call this when --yes flag is passed to prevent interactive prompts.
+void setNonInteractiveMode(bool value) {
+  _isNonInteractive = value;
+}
+
+/// Returns true if the CLI should fail instead of prompting for input.
+/// This is true when running in CI environment OR when --yes flag was passed.
+bool get shouldFailInsteadOfPrompt {
+  return isCI || _isNonInteractive;
+}
+
 int get terminalWidth {
   if (stdout.hasTerminal) {
     return stdout.terminalColumns;
diff --git a/packages/flutterfire_cli/lib/src/common/validation.dart b/packages/flutterfire_cli/lib/src/common/validation.dart
index ce5ab4f7..a7234a6f 100644
--- a/packages/flutterfire_cli/lib/src/common/validation.dart
+++ b/packages/flutterfire_cli/lib/src/common/validation.dart
@@ -35,10 +35,10 @@ Future<AppleInputs> appleValidation({
   }
 
   if (buildConfiguration != null && target != null) {
-    if (isCI) {
+    if (shouldFailInsteadOfPrompt) {
       throw ValidationException(
         platform,
-        'Cannot set both target and build configuration in CI.',
+        'Cannot set both target and build configuration in non-interactive mode (CI or --yes flag).',
       );
     }
     // If user has set both, we need to find out which one they want to use
@@ -56,10 +56,10 @@ Future<AppleInputs> appleValidation({
   }
 
   if (serviceFilePath != null && target == null && buildConfiguration == null) {
-    if (isCI) {
+    if (shouldFailInsteadOfPrompt) {
       throw ValidationException(
         platform,
-        'Cannot set service file path without a target or build configuration in CI.',
+        'Cannot set service file path without a target or build configuration in non-interactive mode (CI or --yes flag).',
       );
     }
     // If user has set serviceFilePath, but not a config type, we need to find out which one they want to use
@@ -143,10 +143,10 @@ DartConfigurationFileInputs dartConfigurationFileValidation({
     configurationFilePath: configurationFilePath,
     flutterAppPath: flutterAppPath,
   );
-  if (isCI && !overwrite) {
+  if (shouldFailInsteadOfPrompt && !overwrite) {
     throw ValidationException(
       kDart,
-      'Required to overwrite Dart Firebase options configuration file in CI. Use `--overwrite-firebase-options` or `--yes` flag.',
+      'Required to overwrite Dart Firebase options configuration file in non-interactive mode (CI or --yes flag). Use `--overwrite-firebase-options` or `--yes` flag.',
     );
   }
   final writeConfigurationFile = overwrite ||
diff --git a/packages/flutterfire_cli/lib/src/firebase.dart b/packages/flutterfire_cli/lib/src/firebase.dart
index f282ce69..608db7cc 100644
--- a/packages/flutterfire_cli/lib/src/firebase.dart
+++ b/packages/flutterfire_cli/lib/src/firebase.dart
@@ -28,16 +28,62 @@ import 'common/utils.dart';
 import 'firebase/firebase_app.dart';
 import 'firebase/firebase_project.dart';
 
+/// Configuration for customizing the Firebase CLI executable.
+///
+/// This allows using a custom Firebase CLI installation (e.g., a forked version
+/// or running via node directly) instead of the default 'firebase' command.
+///
+/// Example usage with node:
+/// ```dart
+/// globalFirebaseCliConfig = FirebaseCliConfig(
+///   executable: 'node',
+///   baseArgs: ['/path/to/firebase.js'],
+/// );
+/// ```
+class FirebaseCliConfig {
+  const FirebaseCliConfig({
+    this.executable = 'firebase',
+    this.baseArgs = const [],
+    this.environment = const {},
+    this.workingDirectory,
+  });
+
+  /// The executable to run (e.g., 'firebase', 'node', 'npx').
+  final String executable;
+
+  /// Base arguments to prepend to all commands (e.g., ['/path/to/firebase.js']).
+  final List<String> baseArgs;
+
+  /// Additional environment variables to set when running commands.
+  final Map<String, String> environment;
+
+  /// The working directory for commands. If null, uses Directory.current.
+  final String? workingDirectory;
+
+  /// Default configuration using the standard 'firebase' CLI.
+  static const FirebaseCliConfig defaultConfig = FirebaseCliConfig();
+}
+
+/// Global configuration for the Firebase CLI.
+/// Set this before calling any Firebase functions to use a custom CLI.
+FirebaseCliConfig? globalFirebaseCliConfig;
+
 /// Simple check to verify Firebase Tools CLI is installed.
 bool? _existsCache;
 Future<bool> exists() async {
   if (_existsCache != null) {
     return _existsCache!;
   }
+  final config = globalFirebaseCliConfig;
+  final executable = config?.executable ?? 'firebase';
+  final args = [...?config?.baseArgs, '--version'];
+
   final process = await Process.run(
-    'firebase',
-    ['--version'],
+    executable,
+    args,
     runInShell: true,
+    environment: config?.environment,
+    workingDirectory: config?.workingDirectory,
   );
   return _existsCache = process.exitCode == 0;
 }
@@ -79,8 +125,12 @@ Future<Map<String, dynamic>> runFirebaseCommand(
       logMissingFirebaseCli,
     );
   }
-  final workingDirectoryPath = Directory.current.path;
+  final config = globalFirebaseCliConfig;
+  final executable = config?.executable ?? 'firebase';
+  final workingDirectoryPath =
+      config?.workingDirectory ?? Directory.current.path;
   final execArgs = [
+    ...?config?.baseArgs,
     ...commandAndArgs,
     '--json',
     if (project != null) '--project=$project',
@@ -90,10 +140,11 @@ Future<Map<String, dynamic>> runFirebaseCommand(
   ProcessResult process;
   try {
     process = await Process.run(
-      'firebase',
+      executable,
       execArgs,
       workingDirectory: workingDirectoryPath,
       environment: {
+        ...?config?.environment,
         if (serviceAccount != null)
           'GOOGLE_APPLICATION_CREDENTIALS': serviceAccount,
       },
diff --git a/packages/flutterfire_cli/lib/src/firebase/firebase_android_options.dart b/packages/flutterfire_cli/lib/src/firebase/firebase_android_options.dart
index a66e7c99..1ceea3f9 100644
--- a/packages/flutterfire_cli/lib/src/firebase/firebase_android_options.dart
+++ b/packages/flutterfire_cli/lib/src/firebase/firebase_android_options.dart
@@ -44,10 +44,11 @@ extension FirebaseAndroidOptions on FirebaseOptions {
     var selectedAndroidApplicationId =
         androidApplicationId ?? flutterApp.androidApplicationId;
 
-    if (isCI && selectedAndroidApplicationId == null) {
+    if (shouldFailInsteadOfPrompt && selectedAndroidApplicationId == null) {
       throw ValidationException(
         kAndroid,
-        'A valid application package name is required when configuring on CI. Please use the `--android-package-name` flag',
+        'A valid application package name is required in non-interactive mode (CI or --yes flag). '
+        'Please use the `--android-package-name` flag to specify the Android package name.',
       );
     }
     selectedAndroidApplicationId ??= promptInput(
diff --git a/packages/flutterfire_cli/lib/src/firebase/firebase_apple_options.dart b/packages/flutterfire_cli/lib/src/firebase/firebase_apple_options.dart
index 36debd88..523e1a02 100644
--- a/packages/flutterfire_cli/lib/src/firebase/firebase_apple_options.dart
+++ b/packages/flutterfire_cli/lib/src/firebase/firebase_apple_options.dart
@@ -38,13 +38,13 @@ extension FirebaseAppleOptions on FirebaseOptions {
     var selectedAppleBundleId = appleBundleIdentifier ??
         (macos ? flutterApp.macosBundleId : flutterApp.iosBundleId);
 
-    if (isCI && selectedAppleBundleId == null) {
+    if (shouldFailInsteadOfPrompt && selectedAppleBundleId == null) {
       final flag = platformIdentifier == kMacos
           ? '--macos-bundle-id'
           : '--ios-bundle-id';
       throw ValidationException(
         platformIdentifier,
-        'A valid bundle Id is required when configuring on CI. Please use the $flag flag.',
+        'A valid bundle Id is required in non-interactive mode (CI or --yes flag). Please use the $flag flag.',
       );
     }
     selectedAppleBundleId ??= promptInput(