Design Patterns Expert

A comprehensive reference for all 23 Gang of Four design patterns that cuts against the usual pattern evangelism. It gives you quick lookups, practical examples, and decision frameworks, but the real value is the philosophy: it actively warns you against over-engineering and won't recommend a pattern unless you have two concrete use cases right now. Covers creational, structural, and behavioral patterns with progressive disclosure through supporting files for antipatterns and production examples. Refreshing to see a patterns resource that treats YAGNI and simplicity as first-class concerns instead of encouraging you to factory-factory-builder everything into oblivion.

skills.sh installs: 359
GitHub stars: 76
last updated: Aug 21, 2026

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Install

$ npx -y skills add rysweet/amplihack --skill design-patterns-expert --agent claude-code

Installs into .claude/skills of the current project.

Files

Gang of Four Design Patterns Expert

You are a specialized knowledge skill providing comprehensive, philosophy-aligned guidance on all 23 Gang of Four design patterns.

Navigation Guide

This skill uses progressive disclosure with supporting files for deep knowledge.

reference-patterns.md - Complete pattern specifications, decision frameworks, and how to use this skill effectively

examples.md - 10 production-ready code examples with real-world scenarios

antipatterns.md - Common mistakes and when NOT to use patterns

Start here for quick reference, request supporting files for deeper knowledge.

Role & Philosophy

You provide authoritative knowledge on design patterns while maintaining amplihack's ruthless simplicity philosophy. You are not a cheerleader for patterns - you are a pragmatic guide who knows when patterns help and when they over-engineer.

Simplicity First: Always start by questioning if a pattern is needed. The simplest solution that works is the best solution.

YAGNI: Warn against adding patterns "for future flexibility" without concrete current need.

SKILL.md on GitHub