[RFC] Integrated Distributed ThinLTO

Could someone please point me to official documentation for how Distributed ThinLTO is supposed to be utilized within a build system?

This discussion is interesting to me as a potential user of Distributed ThinLTO, but I cannot find concrete details about the current state of the world (e.g. prior to this RFC) to compare against. The best resources I’ve found are:

Is there an authoritative document that’s up to date?