[asQuirreL]

This seems reminiscent of Session Types to me:

https://en.wikipedia.org/wiki/Session_type

I think one difference is that session types capture which state a process/co-routine is in after receiving a sequence of messages whereas this system does not, it captures how one can respond to each state in isolation (e.g. I don't think you can statically capture that once a door is closed and locked you can only receive the locked state from it and respond by unlocking it).

[ddellacosta]

Hey you gave me an excuse to link to one of my favorite PWL talks: "A Rehabilitation of Message-passing Concurrency" by Frank Pfenning - https://www.youtube.com/watch?v=LRn_nPfti-Y