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solid-principles

Apply SOLID design principles to object-oriented codebases.

Updated Mar 28, 2026
Search Tags:#architecture#maintainability#refactor#principles#oop#solid#design-patterns
One-click install
npx skills add https://github.com/mechemsi/claude-template --skill solid-principles-mechemsi
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: solid-principles
Source: https://github.com/mechemsi/claude-template/tree/main/skills/solid-principles
Command: npx skills add https://github.com/mechemsi/claude-template --skill solid-principles-mechemsi

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Use SOLID design principles to guide the structure of your codebase—when a class grows unwieldy, when inheritance becomes brittle, when interfaces force clients to depend on unused methods, or when high-level modules depend on concrete low-level implementations.

Core Features & Use Cases

  • Provides a clear checklist of the five SOLID principles: SRP, OCP, LSP, ISP, DIP, with guidance on when each applies.
  • Helps identify and reduce coupling and improve interface design, making code easier to test, extend, and maintain.
  • Use cases include refactoring large classes, evolving APIs, and designing modular architectures that support substitution and easy maintenance.

Quick Start

Audit a module and refactor it to ensure one responsibility per unit, open for extension but closed for modification, correct substitutability, small interfaces, and dependency inversion.

Frequently Asked Questions about solid-principles

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I refactor a large class to follow SOLID principles?▼

To refactor a large class for SOLID principles, audit the module to enforce one responsibility per unit, open/closed extension, correct substitutability, small interfaces, and dependency inversion, resulting in reduced coupling and improved maintainability.

What is the Liskov Substitution Principle and when does it apply to inheritance hierarchies?▼

The Liskov Substitution Principle enforces correct substitutability within inheritance hierarchies, ensuring derived classes replace base classes without breaking behavior, crucial when evolving object-oriented class designs and service modules.

Can I use this SOLID guidance for any object-oriented programming language?▼

Yes, this guidance applies to class design, service modules, and inheritance hierarchies across any object-oriented language where maintainability and substitutability matter, without requiring specific framework dependencies or environments.

How do I fix interfaces that force clients to depend on unused methods?▼

Fixing interfaces with unused methods requires applying the Interface Segregation Principle, which guides splitting large interfaces into smaller, client-specific ones to improve interface design and make code easier to test and maintain.

Why does high-level module dependency on concrete implementations make code hard to maintain?▼

High-level modules depending on concrete low-level implementations create tight coupling and brittle code. Applying the Dependency Inversion Principle resolves this by guiding modules to depend on abstractions, making code easier to extend and maintain.

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