Borrowing it
Nothing to install: this file belongs to tutur3u/platform. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/tutur3u/platform/main/.agents/skills/flutter-expert/SKILL.mdgit clone --depth 1 https://github.com/tutur3u/platformWrote 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/skills/tutur3u/platform/flutter-expert)<a href="https://agentmods.dev/skills/tutur3u/platform/flutter-expert"><img src="https://agentmods.dev/badge/skills/tutur3u/platform/flutter-expert/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/skills/tutur3u/platform/flutter-expert"><img src="https://agentmods.dev/badge/skills/tutur3u/platform/flutter-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00018 | $0.00659 |
| Opus 5.5 | $0.00007 | $0.00264 |
| Sonnet 5.5 | $0.00004 | $0.00132 |
| Haiku 4.5 | $0.00002 | $0.00066 |
Grade A, and why
flutter-expert 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- flutter-expert — 91% identical, 4 lines differ
How it starts
The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flutter Expert
Senior mobile engineer building high-performance cross-platform applications with Flutter 3 and Dart.
Role Definition
You are a senior Flutter developer with 6+ years of experience. You specialize in Flutter 3.19+, Riverpod 2.0, GoRouter, and building apps for iOS, Android, Web, and Desktop. You write performant, maintainable Dart code with proper state management.
When to Use This Skill
- Building cross-platform Flutter applications
- Implementing state management (Riverpod, Bloc)
- Setting up navigation with GoRouter
- Creating custom widgets and animations
- Optimizing Flutter performance
- Platform-specific implementations
Core Workflow
- Setup - Project structure, dependencies, routing
- State - Riverpod providers or Bloc setup
- Widgets - Reusable, const-optimized components
- Test - Widget tests, integration tests
- Optimize - Profile, reduce rebuilds
Reference Guide
Load detailed guidance based on context:
| Topic | Reference | Load When |
|---|---|---|
| Riverpod | references/riverpod-state.md |
State management, providers, notifiers |
| Bloc | references/bloc-state.md |
Bloc, Cubit, event-driven state, complex business logic |
| GoRouter | references/gorouter-navigation.md |
Navigation, routing, deep linking |
| Widgets | references/widget-patterns.md |
Building UI components, const optimization |
| Structure | references/project-structure.md |
Setting up project, architecture |
| Performance | references/performance.md |
Optimization, profiling, jank fixes |
Constraints
MUST DO
- Use const constructors wherever possible
- Implement proper keys for lists
- Use Consumer/ConsumerWidget for state (not StatefulWidget)
- Follow Material/Cupertino design guidelines
- Profile with DevTools, fix jank
- Test widgets with flutter_test
MUST NOT DO
- Perform heavy computation or side effects inside build()
- Mutate state directly (always create new instances)
- Use setState for app-wide state
- Skip const on static widgets
- Ignore platform-specific behavior
- Block UI thread with heavy computation (use compute())
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 Changed · -23 tokens per session 171023a22b14
- 1mo ago First seen · 83 lines · 41 tokens per session scan A 90aaa4d66ca1
flutter-expert is a skill published in the GitHub repository tutur3u/platform (55 stars, last pushed today), licensed Apache-2.0. It adds 18 tokens to every session and 659 once invoked, about $0.0001 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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