Comment by keybits

Dat is mentioned in the OP article[0]: the authors have built on top of hypercore[1] (part of the Dat project) to make Hypermerge[2]

[0] https://www.inkandswitch.com/local-first.html#crdts [1] https://github.com/mafintosh/hypercore [2] https://github.com/automerge/hypermerge