Is documentation about Swift's runtime available? Seems not.

I have read The Swift Programming Language book. https://itunes.apple.com/us/book/swift-programming-language/id881256329?mt=11

I have watched WWDC videos. https://developer.apple.com/videos/wwdc/2014/

I have tried searching Swifts compiler source code, or runtime library source code.

But I've found out nothing, except few questions that actually about Obj-c

I mean, everybody know how obj-c works. isa pointer, cmd, how do we call methods, dynamic binding and other. We know how parameters passed by registers. We can use MachOView to define all methods and classes used in binary. There are many documents about obj-c runtime, open source runtime library. Clang is open source. But what about swift?

So, I think, now we only can revers some code via IDA, or MachOView. And trying to understand how does it work. So here we can show and discuss our researches.