How does this skill help with unit testing?

It provides patterns for creating small, focused interfaces that are easy to mock using function-based implementations, which significantly reduces boilerplate in your test suites.

Why should I return concrete types instead of interfaces in Go?

Returning concrete types provides clarity for the consumer about the exact data they are receiving, making the output contract specific and easier to navigate while maintaining flexibility on the input side.

When should I use generics instead of the empty interface?

Use generics when you need type consistency across a data structure or algorithm (like a type-safe cache) without sacrificing type safety or resorting to reflection.

What is the golden rule of Go interfaces?

The golden rule is to avoid creating interfaces until you actually need them; interfaces in Go should be discovered through implementation rather than designed upfront.

Go Interface Design

Name: Go Interface Design
Author: deandum

bydeandum

0•

API Development

Implements idiomatic Go interface patterns to create decoupled, testable, and maintainable software architectures.

This skill provides Claude with expert knowledge of Go interface design patterns, focusing on principles like 'accept interfaces, return structs' and consumer-side definitions. It guides developers through the decision-making process for creating abstractions, implementing interface segregation to keep components small and focused, and leveraging standard library interfaces. Whether you are refactoring legacy code or designing a new API, this skill helps you navigate the trade-offs between interfaces, generics, and concrete types to ensure your Go projects remain idiomatic and scalable.

Key Features

01Determine the best choice between interfaces, generics, and concrete types

020 GitHub stars

03Implement Interface Segregation to maintain small, focused abstractions

04Apply the 'Accept Interfaces, Return Concrete Types' architectural pattern

05Verify interface satisfaction at compile-time with static checks

06Design mock-friendly APIs for streamlined unit testing

Use Cases

01Refactoring large Go codebases to improve decoupling and testability

02Designing new Go libraries that follow standard library idioms

03Deciding whether to use Generics or Interfaces for specific data structures

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add deandum/go-claude-resources go-interface-design

For use in Claude.ai and ChatGPT

Download Skill