Where does Kobato fit into the CLAMP multiverse? Kobato includes characters from Chobits and Angelic Layer, as well as other CLAMP series, in its world. But it doesn't seem to be the same world as Chobits and Angelic Layer; for example, Chitose Hibiya's children don't appear to be persocoms.

Does Kobato take place in the same world as any other CLAMP series, or is it a standalone world that includes alternate versions of some characters?

(I haven't finished the series, so please use spoiler tags liberally.)
The Kobato page on the CLAMP Wikia has a fairly expansive list of ways that it fits within the multiverse. I'm not going to rewrite all of them, because that would be too long, so I'll just summarize them.


The alternate versions of some characters show up.
Her apartment complex shows up in other series (sometimes in alternate Japans).
A picture of Clow and Yuuko shows up in an explanation of the worlds.
Many characters have cameos.


Overall: some characters from non-modern-Japan show up with different identities, while series set in Japan are related to Kobato.