Basically I would like to implement a package that allows me to open the fuzzy-finder view to execute a custom command / code upon selecting an item in the list.
I don’t know that that’s possible, and the other option of trying to override
atom.workspace.open() would be extremely destructive to other things that are trying to work in the same space. You’ll most likely have to fork
fuzzy-finder and implement your new behavior in place of the normal behavior of opening a file.