I'm the Bruce that's been thinking about this, and I have indeed started working on one. I hope to have something cobbled together soon that basically exposes the WeatherFlow websocket to Indigo, letting folks have access to the AIR & SKY observations and events they generate.
One thing I'm still waiting on is to obtain an actual API key from WeatherFlow for this. Their API documentation says to email them to request an API key. I did that last week and haven't heard anything from them yet...
-Bruce