What are SOLID principles in the context of Node.js?

SOLID principles are five design guidelines (Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion) adapted to create flexible, scalable, and maintainable backend applications.

Does this skill support functional programming in TypeScript?

Yes, it specifically adapts classic SOLID principles for functional-first and interface-driven development rather than strictly adhering to traditional class-based OOP.

Can Claude use this skill to refactor existing codebases?

Absolutely. Claude can analyze your existing functions and modules to identify violations and suggest specific refactored versions based on the SOLID patterns provided.

How does this skill improve software testing?

By promoting Dependency Inversion and Single Responsibility, it ensures code is decoupled from external services, making it easy to unit test using mocks and fakes.

SOLID Principles for Node.js & TypeScript

Name: SOLID Principles for Node.js & TypeScript
Author: DoubleslashSE

byDoubleslashSE

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API Development

Applies clean architecture and SOLID design patterns to Node.js and TypeScript projects to ensure code maintainability and testability.

This skill equips Claude with specialized knowledge to implement SOLID principles adapted for modern TypeScript and functional-first Node.js development. It provides specific patterns for refactoring monolithic functions into single-responsibility modules, utilizing strategy records for open/closed extension, and leveraging dependency injection via factory functions. By following these patterns, developers can move away from rigid, hard-to-test codebases toward modular, loosely coupled architectures that are easier to scale and maintain over time.

Key Features

01Facilitate Dependency Inversion via injection and factory patterns

02Refactor complex functions into Single Responsibility modules

031 GitHub stars

04Ensure Interface Segregation using TypeScript intersection types

05Implement Open/Closed extension patterns using strategy records

06Standardize Liskov Substitution through composition-based design

Use Cases

01Architecting new TypeScript backend services with clear architectural boundaries

02Refactoring legacy Node.js services to improve test coverage and modularity

03Automating code reviews to identify and fix architectural anti-patterns

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add doubleslashse/claude-marketplace solid-principles

For use in Claude.ai and ChatGPT

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