Name: golang-dependency-injection
Rating: 89.60000000000001 (1 reviews)
Author: samber

golang-dependency-injection

Comprehensive guide for dependency injection (DI) in Golang. Covers why DI matters (testability, loose coupling, separation of concerns, lifecycle management), manual constructor injection, and DI library comparison (google/wire, uber-go/dig, uber-go/fx, samber/do). Use this skill when designing service architecture, setting up dependency injection, refactoring tightly coupled code, managing singletons or service factories, or when the user asks about inversion of control, service containers, or wiring dependencies in Go.

1.00x

Quality

86%

Does it follow best practices?

Impact

100%

1.00x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Evaluation results

100%

Inventory Service Refactor

Refactor globals to constructor injection

Criteria

Without context

With context

No package-level DB var

100%

No package-level logger var

100%

No init() for service setup

100%

Constructor injection

100%

Wiring in main()

100%

Infrastructure-first order

100%

Interface at consumer

100%

No global registry

100%

Struct holds dependencies

100%

Refactor notes present

100%

Notification Service: Integration Tests

samber/do testing with clone override

Criteria

Without context

With context

Uses samber/do

100%

Container not in service

100%

Override/clone for mocking

100%

Mock at interface boundary

100%

No real transport in tests

100%

Production wiring in main

100%

Singleton for stateful deps

100%

Tests cover email path

100%

Tests cover push path

100%

No code generation

100%

Order Processing Backend: Wiring with uber-go/fx

fx lifecycle hooks and module grouping

Criteria

Without context

With context

fx.Lifecycle for DB

100%

OnStart hook present

100%

OnStop hook present

100%

fx.Module grouping

100%

fx.New in main

100%

app.Run() usage

100%

No container as dependency

100%

Lifecycle ctx parameter

100%

Infrastructure module

100%

No global service vars

100%

Wiring notes present

100%

Repository: samber/cc-skills-golang
Commit: b88f91d

Evaluated: 3 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Inventory Service Refactor Notification Service: Integration Tests Order Processing Backend: Wiring with uber-go/fx

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