Just to clarify: when you say 'all the code the system knows about', do you mean user code and the standard libraries, or just the user code?
From what I can see, you have to install (npm's equivalent of) the standard libraries you want in to the node_modules dir. (So it's not much of a win over the boilerplate import code.)
However, I'm interested in how you'd have implicit importing of user code -- at first glance, all the code under it seems a decent way to go.
