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.
npx skills add eric861129/SKILLS_All-in-one --skill flutter-expertgit clone --depth 1 https://github.com/eric861129/SKILLS_All-in-oneWrote 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/eric861129/skills_all-in-one/flutter-expert)<a href="https://agentmods.dev/skills/eric861129/skills_all-in-one/flutter-expert"><img src="https://agentmods.dev/badge/skills/eric861129/skills_all-in-one/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/eric861129/skills_all-in-one/flutter-expert"><img src="https://agentmods.dev/badge/skills/eric861129/skills_all-in-one/flutter-expert.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 | $0.00041 | $0.01231 |
| Opus 5 | $0.00020 | $0.00616 |
| Sonnet 5 | $0.00008 | $0.00246 |
| Haiku 4.5 | $0.00004 | $0.00123 |
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 7d 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.
This is a copy
92% identical to flutter-expert — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 139 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.
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 — Scaffold project, add dependencies (
flutter pub get), configure routing - State — Define Riverpod providers or Bloc/Cubit classes; verify with
flutter analyze- If
flutter analyzereports issues: fix all lints and warnings before proceeding; re-run until clean
- If
- Widgets — Build reusable, const-optimized components; run
flutter testafter each feature- If tests fail: inspect widget tree with Flutter DevTools, fix failing assertions, re-run
flutter test
- If tests fail: inspect widget tree with Flutter DevTools, fix failing assertions, re-run
- Test — Write widget and integration tests; confirm with
flutter test --coverage- If coverage drops or tests fail: identify untested branches, add targeted tests, re-run before merging
- Optimize — Profile with Flutter DevTools (
flutter run --profile), eliminate jank, reduce rebuilds- If jank persists: check rebuild counts in the Performance overlay, isolate expensive
build()calls, applyconstor move state closer to consumers
- If jank persists: check rebuild counts in the Performance overlay, isolate expensive
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 |
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.
- 7d ago First seen · 139 lines · 41 tokens per session scan A 4e80b00ec5d5
flutter-expert is a skill published in the GitHub repository eric861129/SKILLS_All-in-one (52 stars, last pushed 4mo ago), licensed MIT. It adds 41 tokens to every session and 1,231 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to flutter-expert, differing in 2 lines, and is treated as a copy.
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