Where do the files incorrectly get installed currently?
The default destination path for effect files is Effects/<repo name>/<category>/<file path>. Writing is restricted to Effects/<repo name> but the <category> can be omitted like this:
Code:
provides: . > ../MIDI_Velocifier II
The above installs the current file as Effects/IX/MIDI_Velocifier II (assuming the .jsfx is saved as "MIDI/MIDI_Velocifier II.jsfx" at the root of the git repository – MIDI being the category).
For the data package, don't add it to any provides. The .data file itself is not supposed to be installed on the user's computer (because it contains only metadata tags for reapack-index).