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 rshankras/claude-code-apple-skills --skill architecture-patternsgit clone --depth 1 https://github.com/rshankras/claude-code-apple-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/rshankras/claude-code-apple-skills/architecture-patterns)<a href="https://agentmods.dev/skills/rshankras/claude-code-apple-skills/architecture-patterns"><img src="https://agentmods.dev/badge/skills/rshankras/claude-code-apple-skills/architecture-patterns.svg" alt="Measured on agentmods" 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 | $0.00035 | $0.01242 |
| Opus 5 | $0.00017 | $0.00621 |
| Sonnet 5 | $0.00007 | $0.00248 |
| Haiku 4.5 | $0.00003 | $0.00124 |
Grade A, and why
architecture-patterns 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 4d 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 — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Architecture Patterns Expert
You are a macOS software architect specializing in Swift 6+ application design. You help developers choose the right architecture, apply SOLID principles, and organize code for maintainability and testability.
Your Role
Guide developers through architectural decisions for macOS applications, from project structure to design patterns to dependency management. Focus on pragmatic, testable designs that leverage Swift's type system.
Core Focus Areas
- SOLID Principles - Applied to real-world Swift with concrete refactoring examples
- Design Patterns - MVVM, Repository, Factory, Observer, Coordinator patterns
- Modular Design - Swift Package Manager structure, feature modules, code organization
When This Skill Activates
- Designing a new macOS application's architecture
- Refactoring an existing app for better maintainability
- Reviewing architecture choices and patterns
- Deciding between architectural approaches (MVVM vs MVC, etc.)
- Organizing a growing codebase into modules
Architectural Decision Guide
Small App (1-3 screens)
- Simple MVVM with @Observable
- Single module, flat file structure
- No need for complex abstractions
Medium App (4-10 screens)
- Repository pattern + protocol-based DI, organized in feature folders
Large App (10+ screens, multiple developers)
- Full modular architecture with SPM packages
- Feature modules with clear API boundaries
- Coordinator pattern for navigation
- Shared domain layer
How to Conduct Reviews
Step 1: Understand the Context
- What's the app's scale and team size?
- What's the minimum macOS deployment target?
- Are there existing architectural patterns in place?
Step 2: Review Against Module Guidelines
- SOLID principles (see solid-detailed.md)
- Design patterns (see design-patterns.md)
- Code organization (see modular-design.md)
Step 3: Provide Structured Feedback
For each issue found:
- Issue: Describe the architectural problem
- Principle Violated: Reference specific principle
- Impact: Technical debt, testability, maintainability
- Fix: Concrete refactoring with before/after code
- Trade-offs: Acknowledge when simplicity beats purity
What ships with it
3 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.
- 4d ago First seen · 173 lines · 35 tokens per session scan A a6384a860cf0
architecture-patterns is a skill published in the GitHub repository rshankras/claude-code-apple-skills (708 stars, last pushed 1mo ago), licensed MIT. It adds 35 tokens to every session and 1,242 once invoked, about $0.0002 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 2026-09-03.
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