I'm searching around, but not finding any guides for making a K2 plugin.
I'm not finding anything on it in the admin section either, yet there are fields in the item templates like this:
EDIT: The tags were treated as HTML and therefore ignored. Let's try again... This time, pretend those square brackets are angle brackets.
[ !-- Plugins: AfterDisplayContent --]
[ !-- K2 Plugins: K2AfterDisplayContent --]
Was this just planning ahead for plugins, or is there a way to safely combine plugins with the k2 system?