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See my comment below, I prototyped something like this. https://news.ycombinator.com/item?id=45180325

Interesting idea. As I understand it though, this wouldn’t give you the kind of conflict semantics I’m talking about out of the box. What I want is - if two users concurrently edit the same line of text, the system can “merge” those changes by storing the conflict. Subsequent readers of the document see a merge conflict and can resolve the conflict manually.

Your system looks like it just enforces a global order on the actions. This will give you SEC - but how do you preserve the information that these edits were concurrent - and thus conflict with one another?

You're right, it's not the same as conflict/merge semantics, but you probably could implement those semantics on top of it. My idea was more about being able to merge offline states for arbitrary data without user intervention while also ensuring that application invariants / semantics are preserved. Preserving app semantics while as much as possible preserving user intentions.

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