flutter_copilot_claw

flutter_copilot_claw is the Flutter-side mounting plugin for Flutter Copilot.

It runs inside your Flutter app and registers the VM Service extensions used by flutter_copilot_mcp.

Start with flutter_copilot_mcp

The core product is flutter_copilot_mcp.

• pub.dev: flutter_copilot_mcp
• GitHub: flutter_copilot

Complete documentation, installation steps, MCP tool list, Cursor setup, and Claude Code setup are all in flutter_copilot_mcp.

What this package does

flutter_copilot_claw only handles the in-app side:

• mounts Flutter Copilot inside your Flutter app
• registers Flutter Copilot VM Service extensions
• exposes runtime hooks used by the MCP server

If you want the full workflow, quick start, and tool overview, use flutter_copilot_mcp.

Recommended setup

One snippet, works for debug, profile, and release — no kDebugMode branching needed. Both captureLogs and ensureInitialized collapse to no-ops in release mode (zero overhead, no VM extensions installed):

import 'package:flutter/material.dart';
import 'package:flutter_copilot_claw/flutter_copilot_claw.dart';

void main() {
  FlutterCopilotBinding.captureLogs(() async {
    FlutterCopilotBinding.ensureInitialized();
    // Any async setup (SystemChrome, plugin init, remote config, …) goes
    // here — its print() output and uncaught errors land in `get_logs`.
    runApp(const MyApp());
  });
}

If you don't care about ambient print() capture you can drop the outer wrapper:

void main() {
  FlutterCopilotBinding.ensureInitialized();
  runApp(const MyApp());
}

captureLogs is a thin runZonedGuarded wrapper — it does not call runApp for you and composes cleanly with other zone-based tooling (Sentry, Crashlytics, Firebase).

Logging: captureLogs vs addLog

Three independent sources feed get_logs, each controlled by a different entry point:

Source	What gets captured	Enabled by
Framework errors	FlutterError.onError + PlatformDispatcher.onError	Automatic — wired inside ensureInitialized().
Ambient output	Everything that goes through print() / debugPrint() and uncaught async errors	captureLogs(body) wrapping the block you care about.
Explicit markers	Exactly the strings you choose to emit	FlutterCopilotBinding.addLog(message, isError: false) at the call site.

addLog is independent of captureLogs — it writes directly into the log buffer as soon as ensureInitialized() has run, with or without a surrounding zone. Use it when you want a specific, easy-to-grep marker in the MCP log stream instead of relying on ambient print().

When to use which

• Only captureLogs — zero-touch migration: existing print() calls across the codebase start showing up in get_logs with no source changes.
• Only addLog — you don't want a zone wrapper (minimum footprint, easier to reason about) and you're happy to annotate the exact lifecycle / business events you care about.
• Both — most informative. captureLogs catches everything that happens to fly by, addLog gives you clear high-signal markers ("login succeeded", "payment step entered").

Example: both together

import 'package:flutter/material.dart';
import 'package:flutter_copilot_claw/flutter_copilot_claw.dart';

void main() {
  FlutterCopilotBinding.captureLogs(() async {
    FlutterCopilotBinding.ensureInitialized();
    FlutterCopilotBinding.addLog('app:boot:start');
    await SomePlugin.init();
    FlutterCopilotBinding.addLog('app:boot:plugins-ready');
    runApp(const MyApp());
  });
}

class LoginPage extends StatelessWidget {
  const LoginPage({super.key});

  Future<void> _login() async {
    FlutterCopilotBinding.addLog('login:attempt');
    try {
      await AuthService.signIn();
      FlutterCopilotBinding.addLog('login:success');
    } catch (e) {
      FlutterCopilotBinding.addLog('login:error: $e', isError: true);
      rethrow; // will also be captured by the outer captureLogs zone
    }
  }
  // …
}

Release behavior

All three entry points are release-safe:

• captureLogs(body) → calls body() directly, no zone installed.
• addLog(...) → no-op.
• ensureInitialized() → delegates to WidgetsFlutterBinding.ensureInitialized().

So the same call sites can stay in shipping builds with no kDebugMode guards and no runtime cost.

Looking for the real docs?

• flutter_copilot_mcp on pub.dev — MCP server for Cursor / Claude Code / other AI clients
• flutter_copilot_cli on npm — terminal / CI CLI (fcc), drives the same VM Service extensions without MCP
• flutter_copilot on GitHub

All complete docs, installation, and MCP tools are documented in flutter_copilot_mcp.

License

Apache License 2.0