That’s right

Are there any guides on using the "react style" framework (JSX / State) to generate outputs other than DOM? I've been interested in the idea of doing something similar for JSON or markdown document generation.

I don't have a good guide for you, but this is the lib you use to create custom React renderers:

https://www.npmjs.com/package/react-reconciler

I’m working on the documentation, but I have a useful implementation of <GithubActions > JSX:

https://github.com/levicape/fourtwo

The best way to use template JSX is either with a CLI, or by using #! pragma to output the constructed yaml after using a builder.