SOLID principles for object-oriented design with multi-language examples (PHP, Java, Python, TypeScript, C++). Use when the user asks to review SOLID compliance, fix a SOLID violation, evaluate class design, reduce coupling, improve extensibility, or apply Single Responsibility, Open/Closed, Liskov
SOLID principles for object-oriented design with multi-language examples (PHP, Java, Python, TypeScript, C++). Use when the user asks to review SOLID compliance, fix a SOLID violation, evaluate class design, reduce coupling, improve extensibility, or apply Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, or Dependency Inversion principles. Covers motivation, violatio