Principles & Patterns

Software design principles, architectural patterns, and clean code practices that govern how good software is structured.

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Notes

• SOLID Principles — Single Responsibility, Open/Closed, Liskov, Interface Segregation, Dependency Inversion with Python examples
• Design Patterns — GoF creational, structural, and behavioural patterns with intent and implementation notes
• Clean Code — naming, functions, comments, error handling, and refactoring heuristics

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