First pass at a great workflow RFC to rule them all.

Is there a "Vendorfile" or something? Or do you give the name of the cookbook you want as input? I could see trying to implement a thing that looks at all your cookbooks, figures out what deps are missing and then installs them, but how would you get it to install something that's not a dependency (for example, you want to use an upstream cookbook as a top-level run list item)?