There are certain actions that I want to be able to trigger at the rule assignment stage of the workflow. I see where I can choose a custom script but I don't see how to define the script. I can write a script to do what I need but where do I put it and how do I reference it from the app? Is there a way I can pass values to it or are values already being passed by default? I don't see where this is covered in the documentation so if it's there and you can point me to it that's fine too.

Thanks!

Jack