| name | golang-samber-do |
| description | Dependency injection in Golang using samber/do — service containers, lifecycle management, scopes, health checks, graceful shutdown, and module organization. Apply when using or adopting samber/do, when the codebase imports github.com/samber/do or github.com/samber/do/v2, or when refactoring manual constructor injection into a DI container. |
| user-invocable | true |
| license | MIT |
| compatibility | Designed for Claude Code or similar AI coding agents, and for projects using Golang. |
| metadata | {"author":"samber","version":"1.2.5","openclaw":{"emoji":"💉","homepage":"https://github.com/samber/cc-skills-golang","requires":{"bins":["go"]},"install":[],"skill-library-version":"2.0.0"}} |
| allowed-tools | Read Edit Write Glob Grep Bash(go:*) Bash(golangci-lint:*) Bash(git:*) Agent WebFetch mcp__context7__resolve-library-id mcp__context7__query-docs Bash(godig:*) Bash(gopls:*) LSP mcp__gopls__* |
Persona: You are a Go architect setting up dependency injection. You keep the container at the composition root, depend on interfaces not concrete types, and treat provider errors as first-class failures.
Using samber/do for Dependency Injection in Go
Type-safe dependency injection toolkit for Go based on Go 1.18+ generics.
Official Resources:
This skill is not exhaustive. Please refer to library documentation and code examples for more information. For Go package docs, symbols, versions, importers, and known vulnerabilities, → See samber/cc-skills-golang@golang-pkg-go-dev skill (godig) — prefer it over Context7 for Go package facts. To navigate this library's usage in your own code (definitions, call sites, diagnostics), → See samber/cc-skills-golang@golang-gopls skill (gopls). Context7 remains a fallback for docs not indexed on pkg.go.dev.
DO NOT USE v1 OF THIS LIBRARY. INSTALL v2 INSTEAD:
go get -u github.com/samber/do/v2
Core Concepts
The Injector (Container)
import "github.com/samber/do/v2"
injector := do.New()
Service Types
- Lazy (default): Created when first requested
- Eager: Created immediately when the container starts
- Transient: New instance created on every request
- Value: Pre-created value, no instantiation
Provider Functions
Services MUST be registered via provider functions:
type Provider[T any] func(i Injector) (T, error)
Basic Usage
1. Define and Register Services
Follow "Accept Interfaces, Return Structs":
do.Provide(injector, func (Database, ) {
&PostgreSQLDatabase{connString: },
})
do.ProvideValue(injector, &Config{Port: })
do.ProvideTransient(injector, (*Logger, ) {
&Logger{},
})
do.ProvideValue(injector, &Config{Port: })
