design-patterns-implementation
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.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill design-patterns-implementation- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads design-patterns-implementation automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Design Patterns Implementation
Table of Contents
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:
class DatabaseConnection {
private static instance: DatabaseConnection;
private connection: any;
private constructor() {
this.connection = this.createConnection();
}
public static getInstance(): DatabaseConnection {
if (!DatabaseConnection.instance) {
DatabaseConnection.instance = new DatabaseConnection();
}
return DatabaseConnection.instance;
}
private createConnection() {
return {
/* connection logic */
};
}
}
// Usage
const db1 = DatabaseConnection.getInstance();
const db2 = DatabaseConnection.getInstance();
// ... (see reference guides for full implementation)
Reference Guides
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| Singleton Pattern | Singleton Pattern |
| Factory Pattern | Factory Pattern |
| Observer Pattern | Observer Pattern |
| Strategy Pattern | Strategy Pattern |
| Decorator Pattern | Decorator Pattern |
| Repository Pattern | Repository Pattern |
| Dependency Injection | 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
FAQ
What does the design-patterns-implementation skill do?
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.
How do I install design-patterns-implementation?
Run npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill design-patterns-implementation in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/design-patterns-implementation/ (personal) or .claude/skills/design-patterns-implementation/ (project).
Which AI agents can use design-patterns-implementation?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is design-patterns-implementation safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains design-patterns-implementation?
It is published by aj-geddes in aj-geddes/useful-ai-prompts. It has 595 recorded installs.
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