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golang-structs-interfaces

Design Go structs and interfaces with composable, type-safe patterns.

1|Updated Mar 21, 2026
Search Tags:#interfaces#go#dependency injection#type assertions#struct design#zero value#noCopy
One-click install
npx skills add https://github.com/dashkan/pivox --skill golang-structs-interfaces-dashkan
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: golang-structs-interfaces
Source: https://github.com/dashkan/pivox/tree/main/.agents/skills/golang-structs-interfaces
Command: npx skills add https://github.com/dashkan/pivox --skill golang-structs-interfaces-dashkan

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps you avoid common Go design mistakes when creating structs and interfaces, so your code stays testable, maintainable, and type-safe.

Core Features & Use Cases

  • Small, composable interfaces: design 1–3 method interfaces and compose larger contracts when needed.
  • Consumer-driven contracts: define interfaces in the package that consumes them, not the package that implements them.
  • Constructor return rules: accept interfaces for dependencies, but return concrete types from constructors.
  • Correct Go type system practices: use compile-time interface checks, safe type assertions, type switches, and optional capability assertions.
  • Struct quality rules: make the zero value useful via lazy initialization, prefer generics over any, and enforce receiver consistency and no-copy safety when required.
  • Serialization safety: require exported struct fields in serialized types to have appropriate tags (json/yaml/db/etc.).

Quick Start

Use the golang-structs-interfaces skill to review and improve your Go type design by asking: "Review my structs and interfaces for consumer-defined contracts, small interface sizes, constructor return types, safe assertions, and zero-value correctness, then suggest具体 changes."

Frequently Asked Questions about golang-structs-interfaces

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I design small, composable Go interfaces for my service?▼

To design composable Go interfaces, define 1–3 method interfaces and compose larger contracts when needed, placing interface definitions in the consuming package rather than the implementing package. This ensures consumer-driven contracts, testability, and loose coupling across your service boundaries.

Should my Go constructors return interfaces or concrete struct types?▼

Go constructors should accept interfaces for dependencies but return concrete struct types. This approach preserves type safety, allows compile-time interface checks, and enables callers to use type assertions or type switches for optional behavior capabilities without obscuring the concrete implementation.

What is the best way to make Go struct zero values useful and safe from accidental copying?▼

Make Go struct zero values useful through lazy initialization, and prevent accidental copying by embedding a noCopy sentinel pattern. You must also maintain receiver consistency across methods to ensure your structs remain safe and ergonomic without requiring explicit constructors.

How do I use type assertions and compile-time checks for Go interface design?▼

Use compile-time interface checks to verify struct implementations, and apply comma-ok type assertions or type switches to safely probe optional behavior capabilities. This pattern allows you to assert specific types dynamically while retaining the type safety guarantees of Go's static type system.

When should I use generics instead of any in Go struct design?▼

You should prefer generics over any in Go struct design when you need to enforce compile-time type safety across different data types. Using generics maintains strict type checking and avoids the runtime type assertions required when relying on the empty any interface.

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