It may be useful to be able to combine (or link, or pipe) two or more PopClip actions into a chain so that the output of one is the input of the next.
This following discussion has been split off from another topic:
One thing that’s cool is that you can combine it with the Sort extension to sort a comma separated list. As in, Split commas into lines → Sort lines → Join lines with commas
Of course, this does bring to mind the possibiliy of compound actions, where a sequence of actions could be chained to make another action