golang-google-wire

The golang-google-wire skill provides expertise in compile-time dependency injection for Go applications using Google's Wire framework. Unlike runtime DI solutions that use reflection and resolve dependencies at application startup, Wire generates plain Go code at compile time through code generation. This means dependency graph errors are caught during the build phase when you run `wire ./...`, not at runtime during the first request. The generated `wire_gen.go` files contain straightforward constructor calls with no magic, making the dependency resolution process transparent and debuggable.

Wire's core capabilities revolve around providers (regular Go functions where inputs are dependencies and outputs are provided types), provider sets that group related providers for reuse, and binding mechanisms that connect interfaces to concrete implementations. The framework supports multiple return signatures including error handling and cleanup functions that are automatically chained in reverse order. It offers primitives like wire.NewSet for grouping providers, wire.Build for defining injector functions, wire.Bind for interface-to-concrete mappings, wire.Struct for field injection, wire.Value for constants, and wire.FieldsOf for extracting struct fields as individual dependencies.

This skill is ideal for Go architects and developers building applications with complex dependency graphs who want compile-time safety and explicit wiring without runtime overhead. It's particularly valuable for microservices, API servers, and large Go applications where catching dependency errors early prevents production issues. The skill targets teams adopting or already using github.com/google/wire in their codebase, especially those migrating from runtime DI frameworks or setting up new projects with strict dependency management requirements. Note that Wire was archived in August 2025 as feature-complete, though bug fixes are still accepted.