Apply appropriate design patterns (Singleton, Factory, Observer, Strategy, etc.) to solve architectural problems. Use when refactoring code architecture, implementing extensible systems, or following SOLID principles.

Design Patterns Implementation Table of Contents [Overview]( overview) [When to Use]( when to use) [Quick Start]( quick start) [Reference Guides]( reference guides) [Best Practices]( best practices) Overview Apply proven design patterns to create maintainable, extensible, and testable code architectures. When to Use Solving common architectural problems Making code more maintainable and testable Implementing extensible plugin systems Decoupling components Following SOLID principles Code reviews identifying architectural issues Quick Start Minimal working example: Reference Guides Detailed implementations in the references/ directory: Guide Contents [Singleton Pattern](references/singleton pattern.md) Singleton Pattern [Factory Pattern](references/factory pattern.md) Factory Pattern [Observer Pattern](references/observer pattern.md) Observer Pattern [Strategy Pattern](references/strategy pattern.md) Strategy Pattern [Decorator Pattern](references/decorator pattern.md) Decorator Pattern [Repository Pattern](references/repository pattern.md) Repository Pattern [Dependency Injection](references/dependency injection.md) Dependency Injection Best Practices ✅ DO Choose patterns that solve actual problems Keep patterns simple and understandable Document why patterns were chosen Consider testability Follow SOLID principles Use dependency injection Prefer composition over inheritance ❌ DON'T Apply patterns without understanding them Over engineer simple solutions Force patterns where they don't fit Create unnecessary abstraction layers Ignore team familiarity with patterns

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