Yeah, I’m actually surprised Apple hasn’t made a play for this from day 1 since developing iOS/OS X often leads to writing/maintaining a bunch of home-made or 3rd-party scripts (usually in Ruby), making app development require not only knowing Objective-C & Cocoa but also some scripting language. After all if Swift is all about making it easier for more people to build apps more easily, this seems like a worthwhile use-case to go after.