Hi,

The Pebble JS stuff is supposed to be sandboxed, so there's very little communication possible between that and other apps possible right now. You can do anything that the Rockpool application can do, so launching apps and sending them config is possible. Not much else.

I'm open to suggestions or contributions though, either for a DBus access API in JS (which the Pebble people were dead against) or something, or for some extension to the DBus interface to allow phone apps to access watch output. I'd prefer the JS DBus API myself though, as I think it fits the watch app lifecycle model better.