golang-structs-interfaces skillA
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golang-structs-interfaces is agent-read markdown (skill) from aiskillstore/marketplace: Golang struct and interface design patterns — composition, embedding, type assertions, type switches, interface segregation, dependency injection via interfaces, struct field tags, and pointer vs value receivers. Use this skill when designing Go types, defining or implementing interfaces, embedding structs or interfaces, writing type assertions or type switches, adding struct field tags for JSON/YAML/DB serialization, or choosing between pointer and value receivers. Also use when the user asks a.
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What the file says
**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-interfaces` skill 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)
```go
type Reader interface {
Read(p []byte) (n int, err error)
}
type Writer interface {
Write(p []byte) (n int, err error)
}
// Composed from small interfaces
type ReadWriter interface {
Reader
Writer
}
```
Compose larger interfaces from smaller ones:
```go
type ReadWriteCloser interface {
io.Reader
io.Writer
io.Closer
}
```
### Define Interfaces Where They're Consumed
…Read the whole file at its exact version.
How to install
mdr add aiskillstore/marketplace/golang-structs-interfaces@v1.2.1mdr add aiskillstore/marketplace/golang-structs-interfaces@sha256:0bc93e1e86c3cf24Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_e3tgtb3ztss5uavq)
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- pass: Frontmatter declares a description
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- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
aiskillstore/marketplace · 427 stars · license none · pushed 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_e3tgtb3ztss5uavq GET https://markdownregistry.com/api/v1/resolve?ref=aiskillstore/marketplace/golang-structs-interfaces GET https://markdownregistry.com/api/v1/blob/0bc93e1e86c3cf24571205b6fdd773a23df1b34366e7f639a9530d6984117601
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