most likely internals because for a external to "unlock skins" the best you could probably is set an overlay on the game of the skin which would probably be very laggy but don't take my word.
externals can read game memory so you cant change the "skin".
internals can read/edit game memory so it...
I wish you could change the size for the text modules for the esp and the world section as well as the ultimate status as frequently it may be difficult to see the text.
also will trigger bot ever be added?