"Making our documentation *available*" Is there any 1st/3rd party solution for hosting multiple, versioned Doc sets with version selector e.g. as some Docker hosted service, to which CI can post newly released versions? I feel this should exist.

Do you mean this? https://api.ktor.io Ktor uses the dokka versioning plugin: https://github.com/Kotlin/dokka/tree/master/plugins/versioning

Yes, that is the functionality I'm looking for

You don't need ktor. The ktor api was just an example.

Thanks will check it out

mkdocs-material + mike combo allow hosting versioned docs on gh pages

Thanks @Big Chungus, we are likely switching to GitHub soon so this may be directly usable 👍

Gh packages are not required here tbh, any static website hosting service can be made to work