This is something that would make wikijs a better tool for team feedback on documents, and would contribute to make it a better Confluence replacement.

For what it's worth, we're using hypothes.is internally to do just this and that seems to work fine, but having it as part of Wiki.js would be great.

One might take inspiration from or include https://hypothes.is/. Annotations would somehow have to be fixed to certain versions/commits, similar to GitHub line comments, else their anchor points might fade away.

A clever implementation could keep track of annotated lines, and if they disappear.

Also see: