OpenApiWeaverOpenAPI to C# Client Generator

An incremental Roslyn source generator that turns OpenAPI 3.x documents, including OpenAPI 3.2, into strongly typed C# HTTP clients at build time.

Zero Runtime Overhead

All code is generated at compile time via Roslyn source generators - no runtime code generation, no reflection, no additional runtime dependencies.

Leverages the Roslyn incremental generator pipeline so only changed documents are re-processed, keeping rebuilds fast even in large solutions.

The package bundles the source generator and all required analyzer assemblies. No CLI tools, no extra MSBuild steps.

Full IntelliSense, compile-time type safety, and navigation support for all generated clients, operations, and DTOs.

Reads OpenAPI 3.0-3.2 documents in JSON (.json) and YAML (.yaml, .yml) formats.

Reports errors and warnings for invalid or unsupported OpenAPI documents as standard compiler diagnostics.