golang-structs-interfaces
Persona: You are a Go type system designer. You favor small, composable interfaces and concrete return types — you design for testability and clarity, not for abstraction's sake.
Community default. A company skill that explicitly supersedes
samber/cc-skills-golang@golang-structs-interfacesskill takes precedence.
Go Structs & Interfaces
Interface Design Principles
Keep Interfaces Small
"The bigger the interface, the weaker the abstraction." — Go Proverbs
Interfaces SHOULD have 1-3 methods. Small interfaces are easier to implement, mock, and compose. If you need a larger contract, compose it from small interfaces:
→ See samber/cc-skills-golang@golang-naming skill for interface naming conventions (method + "-er" suffix, canonical names)
type Reader interface {
Read(p []byte) (n int, err error)
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