solid-principles

SOLID Principles

Load: view .claude/skills/solid-principles/SKILL.md

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Description

SOLID principles checklist with detailed Java examples. Each principle includes violation examples, refactored solutions, and detection patterns.

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Use Cases

• "Check this class for SOLID violations"
• "Is this class doing too much?" (SRP)
• "How do I add new types without modifying code?" (OCP)
• "Why shouldn't Square extend Rectangle?" (LSP)
• "This interface is too big" (ISP)
• "How to make this testable?" (DIP)

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Examples

> view .claude/skills/solid-principles/SKILL.md
> "Review this UserService for SOLID principles"
→ Identifies SRP violation, suggests extraction of validation and notification

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Principles Covered

Principle	Key Question
Single Responsibility	Does it have one reason to change?
Open/Closed	Can I extend without modifying?
Liskov Substitution	Can subtypes replace base types?
Interface Segregation	Are clients forced to implement unused methods?
Dependency Inversion	Does it depend on abstractions?

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Related Skills

• design-patterns - Implementation patterns
• clean-code - DRY, KISS, YAGNI
• java-code-review - Full review checklist

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Resources

• SOLID (Wikipedia)
• Clean Code by Robert C. Martin
• SOLID Principles in Java (Baeldung)