Are there any guides documenting Ash Resources and Domains?

Is there a guide that shows how to document Ash Resources and Domains with ExDoc using @moduledoc and @doc directives? Can I use doctests with Ash?

Edit to say: the generated Docs are impressive! Just curious if there is a guide to explain how they are generated, and if there are ways to write custom documentation for actions, code interfaces etc.

Ash resources are generally documented in one of three ways: 1. @moduledoc 2. Descriptions 3.commends

Search the DSL docs for description to see a whole bunch of places that accept a description.