struct-interface

To design Go interfaces for maintainability, define small, consumer-defined interfaces with single methods to improve mockability and reduce coupling. This approach ensures your API boundaries accept interfaces and return structs, making the codebase significantly easier to test and maintain.

The best way to use struct embedding for composition in Go is to embed structs directly to reuse fields and methods without inheritance. This pattern promotes code reuse and flattens object structures while maintaining a clear hierarchy for maintainable API design.

Accepting interfaces and returning structs in Go creates robust API boundaries by allowing internal implementation details to change without breaking external callers. Interfaces define what dependencies your function needs, while returning structs provides concrete, ready-to-use data.

Verify Go interface satisfaction at compile time by assigning a variable of the concrete type to a blank interface variable, triggering a build error if the contract is unmet. This prevents runtime failures and ensures your structs adhere strictly to design patterns.

Use type definitions in Go to create distinct new types that require explicit conversion, ensuring type safety in API design. Use type aliases when you need an alternate name that is fully interchangeable with the original type without any conversion overhead.

Yes, you can create nil-safe methods on Go structs by explicitly checking for nil receivers at the start of the method body. This prevents runtime panics when a method is called on an uninitialized struct pointer, increasing overall overall robustness.