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design-patterns

Design patterns with Java examples - classic (Factory, Builder, Strategy, Observer, Decorator, Adapter) and enterprise/microservices (Saga, Outbox, CQRS). Use when user asks about patterns, designing extensible components, or distributed transaction strategies.

skills/design-patterns/SKILL.md

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# Design Patterns Skill

Quick reference for common design patterns in Java.

## When to Use
- User asks to implement a specific pattern
- Designing extensible/flexible components
- Refactoring rigid code

## Quick Reference: When to Use What

| Problem | Pattern | Use When |
|---------|---------|----------|
| Complex object construction | **Builder** | Many parameters, some optional |