I have a rather specific question, in case you know. What would be the best CRDT algorithm for editing a document consisting of (i) nested lists, (ii) strings, and (iii) some primitive values?

I'm looking at Kleppermann's JSON work. But it doesn't look like it handles collaborative editing of strings very well: they have to either be treated as an immutable value in a register, which doesn't allow for collaborative editing of the string, or treated as a list of characters, which would have to represent large edits (e.g. deleting a word) as a sequence of character edits, which sounds inefficient. Kleppermann's work also handles maps, which I don't need, which is fine.

For context, I plan to make a tree/structure editor, and am considering representing the document as a CRDT.