[Igrom]

In Git, you can typically refer to commits by the shortest unique prefix of their SHA256 hash. So, instead of eb137af21, you can typically write:

> eb137

and IIRC git will raise an error if the prefix is ambiguous. OP, maybe you could do the same?

[Ezhik]

(developer here)

I think ambiguity is not as critical as in Git here - if you look up a note code with multiple entries, it should just show you both so you can choose the right one based on context.

[bastih]

But that will make links unstable - or OP needs to to turn ambiguous links into some dispatching view.