Sentry Flutter SDK

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Sentry Flutter SDK

Opinionated wizard that scans your Flutter or Dart project and guides you through complete Sentry setup — error monitoring, tracing, session replay, logging, profiling, and ecosystem integrations.

Invoke This Skill When

• User asks to "add Sentry to Flutter" or "set up Sentry" in a Flutter or Dart app
• User wants error monitoring, tracing, profiling, session replay, or logging in Flutter
• User mentions sentry_flutter, sentry_dart, mobile error tracking, or Sentry for Flutter
• User wants to monitor native crashes, ANRs, or app hangs on iOS/Android

Note: SDK versions and APIs below reflect sentry_flutter ≥9.14.0 (current stable, February 2026). Always verify against docs.sentry.io/platforms/flutter/ before implementing.

Phase 1: Detect

Run these commands to understand the project before making any recommendations:

# Detect Flutter project type and existing Sentry
cat pubspec.yaml | grep -E '(sentry|flutter|dart)'

# Check SDK version
cat pubspec.yaml | grep -A2 'environment:'

# Check for existing Sentry initialization
grep -r "SentryFlutter.init\|Sentry.init" lib/ 2>/dev/null | head -5

# Detect navigation library
grep -E '(go_router|auto_route|get:|beamer|routemaster)' pubspec.yaml

# Detect HTTP client
grep -E '(dio:|http:|chopper:)' pubspec.yaml

# Detect database packages
grep -E '(sqflite|drift|hive|isar|floor)' pubspec.yaml

# Detect state management (for integration patterns)
grep -E '(flutter_bloc|riverpod|provider:|get:)' pubspec.yaml

# Detect GraphQL
grep -E '(graphql|ferry|gql)' pubspec.yaml

# Detect Firebase
grep -E '(firebase_core|supabase)' pubspec.yaml

# Detect backend for cross-link
ls ../backend/ ../server/ ../api/ 2>/dev/null
find .. -maxdepth 3 \( -name "go.mod" -o -name "requirements.txt" -o -name "Gemfile" -o -name "*.csproj" \) 2>/dev/null | grep -v flutter | head -10

# Detect platform targets
ls android/ ios/ macos/ linux/ windows/ web/ 2>/dev/null

What to determine:

Phase 2: Recommend

Present a concrete recommendation based on what you found. Don't ask open-ended questions — lead with a proposal:

Recommended (core coverage — always set up these):

• ✅ Error Monitoring — captures Dart exceptions, Flutter framework errors, and native crashes (iOS + Android)
• ✅ Tracing — auto-instruments navigation, app start, network requests, and UI interactions
• ✅ Session Replay — captures widget tree screenshots for debugging (iOS + Android only)

Optional (enhanced observability):

• ⚡ Profiling — CPU profiling; iOS and macOS only (alpha)
• ⚡ Logging — structured logs via Sentry.logger.* and sentry_logging integration
• ⚡ Metrics — counters, gauges, distributions (SDK ≥9.11.0)

Platform limitations — be upfront:

Propose: "For your Flutter app targeting iOS/Android, I recommend Error Monitoring + Tracing + Session Replay. Want me to also add Logging and Profiling (iOS/macOS alpha)?"

Phase 3: Guide

Determine Your Setup Path

Path A: Wizard CLI (Recommended)

You need to run this yourself — the wizard opens a browser for login and requires interactive input that the agent can't handle. Copy-paste into your terminal: ``bash brew install getsentry/tools/sentry-wizard && sentry-wizard -i flutter ` It handles org/project selection, adds sentry_flutter to pubspec.yaml, updates main.dart, configures sentry_dart_plugin for debug symbol upload, and adds build scripts. Here's what it creates/modifies: | File | Action | Purpose | |------|--------|---------| | pubspec.yaml | Adds sentry_flutter dependency and sentry: config block | SDK + symbol upload config | | lib/main.dart | Wraps main() with SentryFlutter.init() | SDK initialization | | android/app/build.gradle | Adds Proguard config reference | Android obfuscation support | | .sentryclirc` | Auth token and org/project config | Symbol upload credentials | Once it finishes, come back and skip to [Verification](#verification).

If the user skips the wizard, proceed with Path B (Manual Setup) below.

Path B: Manual — Flutter App

Step 1 — Install

flutter pub add sentry_flutter

Or add to pubspec.yaml manually:

dependencies:
  flutter:
    sdk: flutter
  sentry_flutter: ^9.14.0

Then run:

flutter pub get

Step 2 — Initialize Sentry in `lib/main.dart`

import 'package:flutter/widgets.dart';
import 'package:sentry_flutter/sentry_flutter.dart';

Future<void> main() async {
  await SentryFlutter.init(
    (options) {
      options.dsn = 'YOUR_SENTRY_DSN';
      options.sendDefaultPii = true;

      // Tracing
      options.tracesSampleRate = 1.0; // lower to 0.1–0.2 in production

      // Profiling (iOS and macOS only — alpha)
      options.profilesSampleRate = 1.0;

      // Session Replay (iOS and Android only)
      options.replay.sessionSampleRate = 0.1;
      options.replay.onErrorSampleRate = 1.0;

      // Structured Logging (SDK ≥9.5.0)
      options.enableLogs = true;

      options.environment = const bool.fromEnvironment('dart.vm.product')
          ? 'production'
          : 'development';
    },
    // REQUIRED: wrap root widget to enable screenshots, replay, user interaction tracing
    appRunner: () => runApp(SentryWidget(child: MyApp())),
  );
}

Step 3 — Add Navigation Observer

Add SentryNavigatorObserver to your MaterialApp or CupertinoApp:

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      navigatorObservers: [
        SentryNavigatorObserver(),
      ],
      // Always name your routes for Sentry to track them
      routes: {
        '/': (context) => HomeScreen(),
        '/profile': (context) => ProfileScreen(),
      },
    );
  }
}

For GoRouter:

import 'package:go_router/go_router.dart';
import 'package:sentry_flutter/sentry_flutter.dart';

final GoRouter router = GoRouter(
  observers: [SentryNavigatorObserver()],
  routes: [
    GoRoute(
      path: '/',
      name: 'home', // name is REQUIRED for Sentry route tracking