single-responsibility-principle

SKILL.md

Every module, class, or function should have responsibility over a single part of functionality. If you can describe what a class does using "AND", it has too many responsibilities.

Describe your class in one sentence. If it contains "AND", split it.

| "Handles user authentication" | ✅ Single responsibility | | "Handles authentication AND sends emails" | ❌ Two responsibilities | | "Manages orders AND processes payments AND tracks inventory" | ❌ Three responsibilities |

Use when creating or modifying classes, modules, or functions. Use when feeling pressure to add functionality to existing code. Use when class has multiple reasons to change. Source: yanko-belov/code-craft.

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