How do you deal with long file paths in your marks?

[maxrzaw]

Some of the projects I work on have very long file paths and this becomes problematic when my marks don't fit on the screen or are just very long.

What I would like is the ability to have relative file names for my marks.
Something like this, where init.lua is my current file, .editorconfig and README.md are in my current project, and harpoon.lua is in a completely different project.

I have a super hacky extension kind of working. But it requires heavy modification of the harpoon list. And there are still some bugs I am working out.
Here is my extension.

How would/do you solve this problem?