gqlgen is a schema-first Go library designed to build type-safe GraphQL servers. It functions as a code generation engine that transforms declarative GraphQL schema definitions into strongly-typed Go source code, ensuring strict alignment between the API contract and the underlying implementation.
The framework distinguishes itself through its deep integration with the Go type system and its highly extensible build pipeline. By using schema-first development, it automates the creation of server boilerplate and resolver stubs, allowing developers to map schema fields directly to Go structs and methods. It supports advanced architectural patterns such as distributed federation, custom middleware for cross-cutting concerns, and directive-based metadata injection to influence generated code and runtime behavior.
Beyond core generation, the toolkit provides a comprehensive suite of features for managing complex API lifecycles. This includes performance-oriented capabilities like database request batching, deferred field resolution, and query complexity analysis to protect server resources. It also handles real-time data streaming via subscriptions, multipart file uploads, and robust error propagation, all while maintaining observability through integrated tracing and logging hooks.
The project is distributed as a Go module, with documentation and installation instructions available in the primary repository.
