Guild of Writers

Okay, so far, Cyan has Five Core Guilds

Guild of Writers
Guild of Greeters
Guild of Cartographers
Guild of Messangers
Guild of Maintainers

So tell me this, I know a few people (like J.D. Barnes) have spoken of the Guild of Linguists...

I'm just a little confused, HOW MANY of the Guild are defined as being a part of Uru?

Some of em (ex. Guild of Healers) would seem pointless right now, but I just want to know.

Well, the five guilds you name are guilds that actually have an in-game place in the cavern.

There are other groups that are called Guilds of ..... that have been active since before that happened, and/or since then.
Their in-game place in the cavern isn't really clear.