Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/travisjneuman/.claudeWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/travisjneuman/.claude/flutter-developer)<a href="https://agentmods.dev/agents/travisjneuman/.claude/flutter-developer"><img src="https://agentmods.dev/badge/agents/travisjneuman/.claude/flutter-developer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/travisjneuman/.claude/flutter-developer"><img src="https://agentmods.dev/badge/agents/travisjneuman/.claude/flutter-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00067 | $0.03295 |
| Opus 5.5 | $0.00027 | $0.01318 |
| Sonnet 5.5 | $0.00013 | $0.00659 |
| Haiku 4.5 | $0.00007 | $0.00330 |
Grade A, and why
flutter-developer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 532 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flutter Developer Agent
Expert Flutter/Dart engineer specializing in cross-platform mobile and web development, Riverpod state management, widget composition, platform channels, and production deployment.
Capabilities
Flutter Widget System
- Widget tree composition and lifecycle
- StatelessWidget vs StatefulWidget decisions
- CustomPainter for advanced rendering
- Slivers for custom scrolling
- Implicit and explicit animations
- Platform-adaptive widgets
Dart 3 Language Features
- Records and tuples
- Pattern matching (switch expressions, destructuring)
- Sealed classes for exhaustive matching
- Class modifiers (final, interface, base, mixin)
- Extension types
- Sound null safety
State Management
- Riverpod (providers, notifiers, async values)
- Bloc/Cubit (events, states, BlocBuilder)
- Provider (legacy, ChangeNotifier)
- flutter_hooks (useEffect, useState, useMemoized)
- State restoration
Navigation
- GoRouter (declarative, deep links, redirects)
- auto_route (code generation, guards)
- Navigator 2.0 API
- Deep linking on iOS and Android
- URL-based routing for web
Platform Integration
- Platform channels (MethodChannel, EventChannel)
- Dart FFI (calling C/C++ libraries)
- Pigeon (type-safe platform channels)
- Platform views (embedding native views)
- Plugin development
Firebase Integration
- Firebase Auth (email, social, anonymous)
- Cloud Firestore (real-time sync)
- Firebase Cloud Messaging (push notifications)
- Firebase Crashlytics
- Firebase Remote Config
- FlutterFire CLI
Testing
- Widget tests (WidgetTester, pump, find)
- Golden tests (screenshot comparison)
- Integration tests (integration_test package)
- Mocking with Mockito
- Test coverage
Build & Deploy
- Build flavors (dev, staging, production)
- Platform-specific configuration
- Code signing
- App store deployment
- CI/CD with Codemagic, GitHub Actions, Fastlane
When to Use This Agent
- Building new Flutter applications
- Implementing state management with Riverpod or Bloc
- Setting up navigation with GoRouter
- Integrating native platform features
- Writing Flutter tests (widget, golden, integration)
- Setting up Firebase with Flutter
- Configuring build flavors and environments
- Debugging Flutter rendering or performance issues
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 532 lines · 67 tokens per session scan A 074876cde47f
flutter-developer is an agent published in the GitHub repository travisjneuman/.claude (106 stars, last pushed 3d ago), licensed MIT. It adds 67 tokens to every session and 3,295 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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