How does this skill improve system testability?

By implementing ports and adapters, it allows you to test core business logic in isolation by easily swapping real infrastructure for mocks or stubs.

Does it include code implementation examples?

Yes, the skill provides directory structures and concrete implementation examples for entities, use cases, ports, and adapters.

Is the guidance limited to a specific programming language?

While examples are often shown in Python, the architectural patterns and principles provided are universal and can be applied to any backend language like Go, Java, or Node.js.

Can I use this for refactoring existing projects?

Yes, it is specifically designed to help transition tightly coupled or monolithic applications into modular, loosely coupled architectures.

Backend Architecture Patterns

Name: Backend Architecture Patterns
Author: lifangda

bylifangda

•

API Development

Implements proven backend architecture patterns like Clean Architecture, Hexagonal Architecture, and Domain-Driven Design to build maintainable and scalable systems.

This skill empowers developers to architect robust backend systems using industry-standard patterns. It provides actionable guidance and implementation templates for Clean Architecture, Hexagonal Architecture (Ports and Adapters), and Domain-Driven Design (DDD). Whether you are starting a project from scratch or refactoring a legacy monolith, this skill helps establish clear boundaries between business logic and external dependencies, ensuring codebases remain testable, framework-agnostic, and easy to maintain as complexity grows.

Key Features

01Standardized directory structures for Clean and Hexagonal architectures

0216 GitHub stars

03Guidance on decoupling business logic from frameworks and databases

04Implementation patterns for DDD entities, value objects, and aggregates

05Best practices for creating testable ports and adapters

06Templates for use case orchestration and repository abstractions

Use Cases

01Refactoring a tightly coupled monolithic application into a maintainable architecture

02Designing a new scalable backend service from scratch with clear layer separation

03Establishing team-wide architecture standards and domain boundaries for complex systems

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add lifangda/claude-plugins architecture-patterns

For use in Claude.ai and ChatGPT

Download Skill