It's using the path needed to rosalina to work, so /luma/titles/<title id>/cheats.txt . Maybe things can be uniformed so Sharkive is compatible with all the solutions out of the box@EventAssistant is creating an app to let you download codes directly from your 3DS.
CTRPF being compatible with Gateshark codes you can use it with it too.
I don't know about the path that it's using but in the worst case you'll just have to move the .txt.
Sharkive project.