# Solid Principles

> Principes SOLID. Use when reviewing code quality or refactoring.

- Skill: `majiayu000/solid-principles-5` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add majiayu000/solid-principles-5`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/solid-principles-5/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/majiayu000/solid-principles-5

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# Principes SOLID

This skill provides SOLID principles guidelines for code quality.

See @REFERENCE.md for detailed documentation.

## Quick Reference

- **S**RP: One reason to change per class
- **O**CP: Extend via interfaces, don't modify existing
- **L**SP: Subtypes substitutable for base types
- **I**SP: Small interfaces (< 5 methods)
- **D**IP: Depend on abstractions, not implementations