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 mouchegmouradian/claude-code-skills --skill flutter-app-buildergit clone --depth 1 https://github.com/mouchegmouradian/claude-code-skillsWrote 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/mouchegmouradian/claude-code-skills/flutter-app-builder)<a href="https://agentmods.dev/skills/mouchegmouradian/claude-code-skills/flutter-app-builder"><img src="https://agentmods.dev/badge/skills/mouchegmouradian/claude-code-skills/flutter-app-builder/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/mouchegmouradian/claude-code-skills/flutter-app-builder"><img src="https://agentmods.dev/badge/skills/mouchegmouradian/claude-code-skills/flutter-app-builder.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 | $0.00103 | $0.05992 |
| Opus 5 | $0.00051 | $0.02996 |
| Sonnet 5 | $0.00021 | $0.01198 |
| Haiku 4.5 | $0.00010 | $0.00599 |
Grade A, and why
flutter-app-builder 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 9d 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 — 814 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flutter Development
Build Flutter applications following clean architecture principles, BLoC/Cubit state management, and complexity-appropriate patterns.
Quick Reference
| Task | Reference File |
|---|---|
| Complexity tier selection | complexity-tiers.md |
| Architecture layers (UI, Domain, Data) | architecture.md |
| BLoC/Cubit patterns & state management | bloc-patterns.md |
| Navigation with go_router | navigation.md |
| Data layer (Drift, Dio, Repository) | data-layer.md |
| Dependency injection (get_it, injectable) | di.md |
| Testing approach | testing.md |
Step 0: Detect Complexity Tier
Before writing any code, classify the project into one of two tiers. This determines every architectural decision that follows.
Detection Heuristics
Apply these signals in order. The first confident match wins.
Tier 1 — Simple (default for ambiguous small projects):
- Described as: demo, prototype, personal app, learning project, side project, sample, or proof-of-concept
- 1–3 distinct user-facing features
- Features are independent — no described need to share data across screens
- Solo developer with no production deployment requirements
- No described need for background sync, complex caching, or multi-team workflow
- Examples: counter app, note-taking app, flashcard app, unit converter, habit tracker
Tier 2 — Production:
- 3+ distinct user-facing features, or
- Team or production release, or
- Needs testable DI (injectable), type-safe code generation, or clean architecture boundaries, or
- Complex local persistence (relational data, sync), or
- Existing codebase being extended with production expectations
- Examples: e-commerce app, social app, fitness tracker with sync, real-time chat app
Fallback: Ask When Uncertain
If the description is ambiguous, ask exactly one clarifying question before proceeding:
What ships with it
12 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.
- assets/templates/pubspec.yaml.tier1.template 516 B
- assets/templates/pubspec.yaml.tier2.template 871 B
- LICENSE 1.1 KB
- README.md 4.1 KB
- references/architecture.md 9.0 KB
- references/bloc-patterns.md 12 KB
- references/complexity-tiers.md 15 KB
- references/data-layer.md 9.5 KB
- references/di.md 5.0 KB
- references/navigation.md 6.2 KB
- references/testing.md 7.5 KB
- scripts/generate_feature.py 12 KB runs code
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.
- 9d ago First seen · 814 lines · 103 tokens per session scan A 2f2961ec0e5c
flutter-app-builder is a skill published in the GitHub repository mouchegmouradian/claude-code-skills (2 stars, last pushed 2mo ago), licensed MIT. It adds 103 tokens to every session and 5,992 once invoked, about $0.0005 per session on Opus 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 2026-08-31.
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