...I guess i just misunderstood the nature of your question. Yeah there's no way to tell if the history is everything they send or just the commands it heard. But at least it's something. Guess you're looking for something more along the lines of this type stuff
https://www.piettes.com/hacking-alexa-the-new-amazon-echo/
http://echo.amazon.com/js/eb25f-app.min.js
http://www.amazon.com/gp/help/customer/display.html/ref=hp_l...
But who knows. they could still be hiding stuff. time will tell
// TIL about JTRIG. neat! HN wouldn't let me use TravCav. Search that if you're curious.