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Architecture Patterns Expert · rshankras | DecimalAI

codingby rshankras

Architecture Patterns Expert

rshankras/architecture-patterns

Source rshankras/claude-code-apple-skills ↗License MIT

Deep dive into software architecture for macOS. Covers SOLID principles, design patterns, and modular code organization.

SkillScore86Maintained

Automatic

Coding pack

Last verified 8/18/2026

What it changes

Passed 19 of 22 test cases with the skill, and 17 of 22 without it.

Without skill77%

With skill86%

Checks it passed that the model alone missed

Evaluates the scale of the app and team size
Recommends implementing the Repository pattern
Recommends protocol-based dependency injection

and 5 more in the full report

4 fixed15 passed either way1 still failing2 broke

Pass-rate lift: +9 pp
Tokens: +43%
Agent turns: 0%
Response time: -7%

Model gemini-3.6-flashMeasured 8/18/2026v119 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/rshankras-architecture-patterns/SKILL.md https://app.decimal.ai/s/rshankras-architecture-patterns/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add rshankras-architecture-patterns, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/rshankras-architecture-patterns/ and pins it in .decimal/skills.lock

decimalai skills add rshankras-architecture-patterns

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/rshankras-architecture-patterns/SKILL.md https://app.decimal.ai/s/rshankras-architecture-patterns/SKILL.md

Raw file: /s/rshankras-architecture-patterns/SKILL.md ↗ · machine-readable summary at /s/rshankras-architecture-patterns.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 4

Prompt

I am designing a simple macOS menu bar utility with 2 screens using Swift 6. What architectural pattern and project structure should I choose?

What was checked, without and with the skill
Checked	Without skill	With skill
Recommends MVVM using the @Observable macro	Passed	Passed
Recommends a single module with a flat file structure	Missed	Passed
Advises against introducing complex dependency injection abstractions	Missed	Passed

case-01 · gemini-3.6-flash · 8/18/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md163 linessingle file

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

Track record

Benchmark

19 / 22

test cases passed, vs 17 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

rshankras / claude-code-apple-skills

skills/macos/architecture-patterns/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.

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See it in action

What's inside

Architecture Patterns Expert

Your Role

Core Focus Areas

When This Skill Activates

Architectural Decision Guide

Small App (1-3 screens)

Medium App (4-10 screens)

Large App (10+ screens, multiple developers)

How to Conduct Reviews

Track record

Benchmark

Adoption

SkillSafety

Source

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