It sends out initial target messages either globally or locally and can take a few arguments. It looks kind of crude to me now and I'm just writing most of my routing in-patch right now to see what I need for externals, how I need them to behave, etc. I'm looking for better ways to do this stuff.
My question is - what are your favorite objects and methods for sending out messages and storing data for easy retrieval in the rest of the patch? pv? pattr? Are there any guides or references you find particularly useful?