Working on a plugin.
I'd like to add a button to the library tab of the media_upload page to insert a shortcode. It's an [audio ] shortcode.
This plugin attempts the same thing, but it stopped working a few versions of wp ago.
This discussion covers how to make something work
But what works is the insertion of a corrupt hyperlink : you can't say href="[shortcode'" and expect anything to work.
If you know a good way to insert a program-generated shortcode, that would be very helpful.