I have recorded all the operations of a document. Each operation has an id .

When the document is loaded into memory, it has a unique uuid as the agent id.

If the current version is

hash(a1 b2 c3)

If two people edit the document at the same time the name will become

hash(a1 b2 c3 e4)

hash(a1 b2 c3 d4 d5)

After merging, the document name will become

hash(a1 b2 c3 d4 e4 d5)

a1, b2 is "Lamport timestamp" https://en.wikipedia.org/wiki/Lamport_timestamp

the full version (a1 b2 c3 e4) is “vector clock” https://en.wikipedia.org/wiki/Vector_clock