This looks very cool on the surface. There are a lot of systems out there with a mishmash of javascript and shell, those systems are stitched together in arbitrary ways, and it can often make them hard to debug and test. This looks like it'll make it easier to write and test those integrations, which is a win.

My main concern is that when things don't work as expected, the added layer of complexity will make it harder to figure out why. Hopefully there aren't too many rough edges.