Just checked out the node-machines.org and theJsDot presentaion there. Many parts of it has paralells to things I'm playing around with[1]. What are the reasons for not going with an established concepts for the machines? Like contracts for specifying pre-conditions (input requirements) and post-conditions? Or Promises for error vs success scenarios?

1. https://github.com/jonnor/projects/blob/master/introspectabl..., maybe especially Agree