I'd start with the WebAPI sample and it's rd.xml file, see https://github.com/dotnet/corert/blob/master/samples/WebApi

Also take a look at this project https://github.com/shtik/cli/tree/dev/src/slidey, AFAIK it's the project that inspired the video I embedded in the post

There are samples on the CoreRT site, which are a good place to start. I found some of their discussions useful too when finding bits to put into rd.xml, like newtonsoft.json