This looks perfect for a project I'm working on which is a UNIX / Linux $SHELL that makes heavy use of JSON pipelining.
structured shell, go on
https://github.com/lmorg/murex
It's not without its bugs but I now use it everyday as my primary shell. Documentation is about 30% there but that's something I'm actively working on at the moment.
Happy to receive any feedback, possitive or negative :)