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 aaronbassett/agent-foundry --skill flutter-architecturegit clone --depth 1 https://github.com/aaronbassett/agent-foundryWrote 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/aaronbassett/agent-foundry/flutter-architecture)<a href="https://agentmods.dev/skills/aaronbassett/agent-foundry/flutter-architecture"><img src="https://agentmods.dev/badge/skills/aaronbassett/agent-foundry/flutter-architecture.svg" alt="Measured on agentmods" 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 | $0.00050 | $0.03037 |
| Opus 5 | $0.00025 | $0.01519 |
| Sonnet 5 | $0.00010 | $0.00607 |
| Haiku 4.5 | $0.00005 | $0.00304 |
Grade A, and why
flutter-core:flutter-architecture 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 8d 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 — 268 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flutter Architecture
Master Flutter app architecture patterns including MVVM, Clean Architecture, and design patterns for building scalable, maintainable applications.
When to Use This Skill
Use this skill when:
- Architecting a new Flutter application from scratch
- Refactoring an existing Flutter app to improve maintainability and scalability
- Implementing MVVM pattern with ViewModels and state management
- Applying Clean Architecture principles with proper layer separation
- Setting up dependency injection with get_it and injectable
- Organizing project structure (feature-based vs layer-based)
- Implementing repository and service patterns
- Building applications that require high testability
- Working on team projects with multiple developers
- Scaling a Flutter codebase for long-term maintenance
Why Architecture Matters in Flutter
Architecture is the foundation of any successful Flutter application. While Flutter makes it easy to build beautiful UIs quickly, without proper architecture, applications become difficult to maintain, test, and scale as they grow.
The Cost of Poor Architecture
Many Flutter developers start building apps without considering architecture, leading to:
- Massive widget files containing business logic, UI code, and data fetching all mixed together
- Tight coupling between components making changes risky and time-consuming
- Difficult testing because logic is embedded in widgets that require full widget testing
- Merge conflicts when multiple developers work on the same features
- Slow onboarding as new developers struggle to understand the codebase structure
- Technical debt that compounds over time, eventually requiring expensive rewrites
The Benefits of Intentional Architecture
Investing in proper architecture from the start provides significant long-term benefits:
Maintainability: Well-architected code is easier to modify, update, and fix. When business requirements change (and they always do), you can make updates confidently without breaking unrelated features.
What ships with it
7 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.
- 8d ago First seen · 268 lines · 50 tokens per session scan A ffd41012af11
flutter-core:flutter-architecture is a skill published in the GitHub repository aaronbassett/agent-foundry (4 stars, last pushed 23d ago), licensed MIT. It adds 50 tokens to every session and 3,037 once invoked, about $0.0003 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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