Makes me think of Plan 9 and its almost religious use of the 9P protocol to control what resources are available to a process. Or perhaps the Erlang VM with com

Makes me think of Plan 9 and its almost religious use of the 9P protocol to control what resources are available to a process. Or perhaps the Erlang VM with communication via messages. Composing systems in this way is very different than adding untrusted code to your application but seems like an interesting alternative approach.