"choose" popup selector

Has anyone seen this new “app”:


Looks like it could be integrated in interesting ways to FoldingText workflows …

I can see how it would be useful for selecting items from FT files, especially those parsed with the command line tool, but I’m not quite sure how the output could be used … maybe selected items could somehow be tagged?

I’m not in a position now to hack on this (end of semester grading is drawing near), but I thought other folks might find it intriguing.