go-dependency-injection

Structure Go service dependencies with constructor injection and interfaces.

Updated May 2, 2026

Search Tags:#interfaces #backend #golang #dependency injection #wire #constructor injection #service architecture

Ready to run

npx skills add https://github.com/Qunnnn/agents --skill go-dependency-injection-qunnnn

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: go-dependency-injection
Source: https://github.com/Qunnnn/agents/tree/main/skills/go/go-dependency-injection
Command: npx skills add https://github.com/Qunnnn/agents --skill go-dependency-injection-qunnnn

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps Go developers manage service dependencies cleanly by avoiding tightly coupled code, global state, and hard-to-test architectures.

Core Features & Use Cases

Dependency Injection Patterns: Guides manual constructor injection, interface-based design, and composition root practices for Go applications.
DI Library Guidance: Compares and explains when to use tools such as wire, dig, fx, and do for larger dependency graphs.
Use Case: Apply this Skill when designing a backend service that needs testable components, clear dependency wiring, and maintainable initialization logic.

Quick Start

Ask the AI to design a Go service dependency injection structure using constructor injection and recommended DI practices.

Frequently Asked Questions about go-dependency-injection

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I structure dependency injection in a Go backend service?▼

Use manual constructor injection and interface-based design to structure dependencies for your Go backend. This ensures testable architecture, loose coupling, and centralized wiring at the composition root, avoiding tightly coupled code and global state for maintainable service composition.

What's the best way to manage large dependency graphs in Golang?▼

For large Golang dependency graphs, use DI libraries like wire, dig, or fx. These tools automate dependency resolution and centralized wiring, reducing manual boilerplate while maintaining testable architecture and explicit service composition across complex backend applications.

When do I need dependency injection libraries for Go applications?▼

You need dependency injection libraries in Go applications when manual constructor injection becomes cumbersome due to large, complex dependency graphs. Libraries like wire or fx provide centralized wiring and automated dependency resolution, ensuring maintainable initialization logic for growing backend services.

How does constructor injection improve testability in Golang?▼

Constructor injection improves Golang testability by enforcing explicit dependency passing through interfaces, which allows easy substitution of real services with mocks. This loose coupling ensures components are isolated, making service architecture thoroughly testable without relying on global state.

Do I need to use interfaces for every service when applying dependency injection in Go?▼

No, you do not need interfaces for every service, but using them for dependencies enables loose coupling and testable architecture. Applying interface-based design at the composition root allows effective mocking and flexible service composition during Go dependency injection.