Introducing the domain system

The domain system is a big under-the-hood improvement that has quietly gone live, but will start to be used. In short, the idea is that it is now very easy to create domains, which create sub-divisions of the full metaculus community (which we've started referring to as "Metaculus prime", or "MP"). The idea of a domain is:

The hope here is that domains can be used in a few different ways, e.g.,

We're currently in the process of integrating what was previously a private instance, ai.metaculus.com, into the domain system. So you'll probably start to see some cross-posted questions soon, and there will be discussion as to how to pin down some of the specifics of how domains will/should connect with MP. Feedback will be most welcome!