An easy to use Web-Api framework (which encourages CQRS and Vertical Slice Architecture) built as an extension to the Asp.Net pipeline. Performance is on par with .net 6 minimal apis and is 2X faster; uses only half the memory; and outperforms a traditional MVC controller by about 73k requests per second on a Ryzen 3700X desktop.
that's mostly it. all of your Endpoint definitions are automatically discovered on app startup and routes automatically mapped.
proper documentation will be available within a few weeks once v1.0 is released. in the meantime have a browse through the Web, Test and Benchmark projects to see more examples.