Golang Samber Do

What it does

When your agent uses it

• Tasks that involve Design patterns
• Tasks that involve Refactoring

Example prompts

• “/golang-samber-do”

Requirements

• Compatibility (from SKILL.md): Designed for Claude Code, Codex or similar harness, and for projects using Golang.
• Pre-approved tools (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__*

Workflow steps

5 steps, taken from the step headings in SKILL.md.

1. 1Define and Register Services
2. 2Invoke Services
3. 3Service Dependencies
4. 4Implicit Aliasing (Preferred)
5. 5Named Services

What it can do on your machine

Read from SKILL.md and the folder at commit 8876467. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Edit
  • Write
  • Glob
  • Grep
  • Bash(go:*)
  • Bash(golangci-lint:*)
  • Bash(git:*)
  • Agent
  • WebFetch

  …and 6 more on the same allowed-tools line.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • go

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • pkg.go.dev
  • do.samber.dev
  • github.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

• Compatibility

  Designed for Claude Code, Codex or similar harness, and for projects using Golang.

  From compatibility in the SKILL.md frontmatter.

Context cost

Golang Samber Do loads about 2.3k tokens when it runs, and up to ~3.9k if it reads all its reference files. Until then it costs about 78 tokens; SKILL.md has 615 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~78

When it runs · the whole SKILL.md, loaded when a task matches

~2.3k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~3.9k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from context-labs/whip at commit 8876467, republished under its MIT licence (© context-labs). 615 words, ~2,268 tokens.

name

golang-samber-do

description

Dependency injection in Go using samber/do — service containers, lifecycle, scopes, health checks, graceful shutdown, module organization. Apply when using or adopting samber/do, when the codebase imports github.com/samber/do(/v2), or when refactoring constructor injection into a DI container.

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__*

compatibility

Designed for Claude Code, Codex or similar harness, and for projects using Golang.

user-invocable

true

license

MIT

metadata.author

samber

metadata.version

1.3.0

paths

**/*.go

go get -u github.com/samber/do/v2

import "github.com/samber/do/v2"

injector := do.New()

type Provider[T any] func(i Injector) (T, error)

// Register a service (lazy by default)
do.Provide(injector, func(i do.Injector) (Database, error) {
    return &PostgreSQLDatabase{connString: "postgres://..."}, nil
})

// Register a pre-created value
do.ProvideValue(injector, &Config{Port: 8080})

// Register a transient service (new instance each time)
do.ProvideTransient(injector, func(i do.Injector) (*Logger, error) {
    return &Logger{}, nil
})

// Register an eager service (created immediately at startup)
do.ProvideValue(injector, &Config{Port: 8080})

// Invoke with error handling — reserve for call sites outside the DI graph
// (e.g. an HTTP handler that must degrade gracefully instead of crashing)
db, err := do.Invoke[Database](injector)

// MustInvoke panics on error — preferred in providers, recovered by do.Invoke on the parent call
db := do.MustInvoke[Database](injector)

func NewUserService(i do.Injector) (UserService, error) {
    db := do.MustInvoke[Database](i)
    cache := do.MustInvoke[Cache](i)
    return &userService{db: db, cache: cache}, nil
}

do.Provide(injector, NewUserService)

// Register concrete type
do.Provide(injector, func(i do.Injector) (*PostgreSQLDatabase, error) {
    return &PostgreSQLDatabase{}, nil
})

// Invoke directly as interface (implicit aliasing)
db := do.MustInvokeAs[Database](injector)

do.ProvideNamed(injector, "primary-db", func(i do.Injector) (*Database, error) {
    return &Database{URL: "postgres://primary..."}, nil
})

mainDB := do.MustInvokeNamed[*Database](injector, "primary-db")

// infrastructure/package.go
var Package = do.Package(
    do.Lazy(func(i do.Injector) (*postgres.DB, error) {
        cfg := do.MustInvoke[*Config](i)
        return postgres.Connect(cfg.DatabaseURL)
    }),
    do.Lazy(func(i do.Injector) (*redis.Client, error) {
        cfg := do.MustInvoke[*Config](i)
        return redis.NewClient(cfg.RedisURL), nil
    }),
)

// main.go
injector := do.New(infrastructure.Package, service.Package)

func main() {
    injector := do.New(
        infrastructure.Package,
        repository.Package,
        service.Package,
        transport.Package,
    )

    server := do.MustInvoke[*http.Server](injector)
    go server.ListenAndServe()

    _ = injector.ShutdownOnSignalsWithContext(context.Background(), os.Interrupt)
}

© context-labs, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (references) in .agents/skills/golang-samber-do of context-labs/whip.

• SKILL.md
• evals/evals.json
• references/advanced.md
• references/testing.md

Open the folder on GitHubat commit 8876467

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in context-labs/whip, which our catalogue first saw on October 7, 2026.

• samber/cc-skills-golangskills/golang-samber-do