Design Patterns Skill

Goal

To improve code maintainability, flexibility, and readability by applying proven solutions to common design problems.

Supported Patterns (2025 Context)

Creational

• Factory / Builder: For complex object construction (e.g., configuring LLM clients).
• Singleton: Use sparingly (e.g., for Database connections or Logging service).

Structural

• Adapter: Connecting legacy code or external APIs (e.g., standardizing different LLM APIs).
• Facade: Simplifying complex subsystems (e.g., a simple WebScraper class wrapping Puppeteer).
• Composite: For tree structures (e.g., parsing code ASTs).

Behavioral

• Strategy: Swappable algorithms (e.g., switching between 'Fast' and 'Smart' search).
• Observer: Event handling (e.g., updating UI when data changes).
• State: Managing complex entity lifecycles (e.g., Order status: Pending -> Paid -> Shipped).