Athena currently supports query and request params via the logic within ATH::Params. It is somewhat of a one-off implementation, that adds a fair bit of complexity, and less than ideal DX given the annotations are applied to the controller action vs the specific param.

I'm planning on re-implementing this to tie into the argument resolver logic, where there will be an annotation to map a specific query parameter to a controller parameter, and one to map multiple query parameters into a DTO type. The latter of which can make use of validation constraints whereas the former cannot.

This new implementation will not have the same functionality as before, but I think this is an overall win to keep complexity down until a use case can be explored. But we shall see how it goes.