golang-design-patterns

Functional options in Go allow you to build flexible constructors by passing configuration functions to a struct initializer, enabling stable APIs that evolve without breaking changes. This pattern provides explicit defaults and improves testability.

Avoiding init() and mutable globals in Go services improves testability and reliability by preventing hidden side effects during package initialization. Explicit constructors ensure deterministic behavior and predictable lifecycle management in production systems.

The best way to handle graceful shutdown in Go involves explicit resource management patterns and careful error handling during lifecycle transitions. This ensures deterministic behavior and clean cleanup for production-ready CLIs and services.

Yes, you can apply clean architecture guidance to Go library code and CLIs by organizing code with functional options, avoiding mutable globals, and enforcing explicit defaults. This approach ensures predictable and evolvable architecture decisions.

You should start enums at 1 in Go to reserve the zero value as an uninitialized state, which enforces explicit defaults and prevents accidental usage of unset configurations in production-ready code.

Yes, this Go design pattern guidance works for libraries, CLIs, and production services by codifying idiomatic patterns like functional options, error flow management, and graceful shutdown to ensure consistent and maintainable code.