I'd like to let it load libraries which are loaded in your current session, as well as detect function definitions and provide those as well. I just don't know how much work it takes to do that safely (safely meaning you don't want any side effects) and cleanly.
To do so would mean that you have to load all libraries of the 'current session' each time. This could take some time. That's why I prefer the way to auto-load '.getSig' if I start a new session.