Wire (Go DI)
Compile-time dependency injection framework for Go. Wire generates dependency injection code at build time using provider functions — you define what each component needs (database, config, logger) and Wire generates the wiring code. Unlike runtime DI containers (Java Spring, Python DI), Wire produces plain Go code with zero runtime overhead and full type safety. Standard Google approach for DI in large Go services.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Code generation tool — no network calls. Generated code is auditable plain Go. No security concerns for the generator itself.
⚡ Reliability
Best When
You're building a Go agent backend with 10+ components and want type-safe, compile-time verified dependency injection without runtime reflection overhead.
Avoid When
You need dynamic, runtime-configurable dependency injection (e.g., plugin-based architectures) — use Uber's fx for lifecycle-aware, runtime DI.
Use Cases
- • Wire agent service components (database, cache, HTTP client, config) together without manual constructor chaining
- • Generate application initialization code for agent backends — Wire produces a single InitializeApp() function with all dependencies resolved
- • Swap implementations for testing — Wire injector sets allow swapping real databases with test doubles without changing service code
- • Manage complex dependency graphs in large Go agent systems where manual wiring becomes error-prone
- • Enforce separation of concerns in agent code — providers define their own dependencies, Wire validates the full dependency graph at compile time
Not For
- • Small applications where manual constructor injection is readable — Wire adds overhead for simple 5-component services
- • Runtime-configurable dependency graphs — Wire generates static code; dynamic runtime injection requires fx (Uber) or similar runtime containers
- • Teams new to Go — Wire's concepts (providers, injectors, wire sets) require familiarity with Go interfaces and build tooling
Interface
Authentication
Code generation tool — no external auth. Wire generates pure Go code with no runtime dependencies.
Pricing
Apache 2.0 open source from Google. Note: Wire development has slowed — it is feature-complete but not actively adding features.
Agent Metadata
Known Gotchas
- ⚠ Wire requires running 'wire' command to regenerate wire_gen.go after provider changes — committing stale wire_gen.go causes compile errors in other environments
- ⚠ Wire panics on circular dependencies at generation time — the error message identifies the cycle but Go's type system doesn't prevent cycles at the source level
- ⚠ Provider functions must have unique output types — two providers returning the same type cause 'ambiguous type' errors; use tagged types (type DB *sql.DB) to disambiguate
- ⚠ Wire does not manage lifecycle (Start/Stop) — use Uber's fx instead if components need ordered initialization and graceful shutdown hooks
- ⚠ Build tags ('//go:build wireinject') required in injector files — forgetting the build tag causes 'panic: wire: unimplemented' at runtime when the wire file is included in non-wire builds
- ⚠ Wire generated code (wire_gen.go) should be committed to git — teams sometimes add it to .gitignore which causes CI failures when wire is not installed in CI
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Wire (Go DI).
Scores are editorial opinions as of 2026-03-06.