What are the main principles of SOLID you applied to improve your code architecture?

When improving the code architecture, I applied the following SOLID principles:

• Single Responsibility Principle (SRP) — each class or module should have one responsibility, so that changes in one part do not affect others.
• Open/Closed Principle (OCP) — code should be open for extension but closed for modification, allowing functionality to be added without changing existing code.
• Liskov Substitution Principle (LSP) — subclasses should be interchangeable with their base classes without breaking the logic.
• Interface Segregation Principle (ISP) — it is better to have several specialized interfaces rather than one general one, so clients depend only on the methods they need.
• Dependency Inversion Principle (DIP) — dependencies should be based on abstractions rather than concrete implementations, which facilitates testing and maintenance.

Applying these principles helps make the code more flexible, maintainable, and extensible.