Software Design Principles

Fail-fast error handling improves robustness by adding explicit validations to surface problems at the source, catching issues early through type-driven design before they propagate through the system.

Object calisthenics enforces clarity through intention-revealing naming, replacing generic names like utils or helpers with domain-specific terms to improve readability and reduce unnecessary comments.

Dependency inversion simplifies testing by introducing explicit interfaces for dependencies and applying dependency injection, which decouples components and encourages future architectural changes.

These software design principles are applicable across languages, emphasizing universal best practices like avoiding unsafe types, embracing immutability, and enforcing explicit error handling.

Type-driven design prevents illegal states by favoring strong types and immutable patterns, ensuring that invalid data structures cannot be constructed and eliminating unexpected side effects.

Core software design principles are needed during refactoring and design reviews to codify best practices, restructure code, and evaluate architecture to produce maintainable, well-structured code.