What tool does Epic use for authoring the main documentation?

I see your making use of Doxygen and custom parsers for the API documentation but what about the regular Documentation? It’s a great format that i’d like to mimic for our games design docs.

After some more digging I “think” they’re using their own spin on Confluence, which i’ve adopted and digging quite a bit. Aside from being a little sluggish it seems to be a great platform for game design docs.