Settings and activity

Just use different endpoints for development and live. Then you can easily find out where the request came from.
It is anyway better to have code in both environments for release management.

I guess the problem why amazon has not already implemented this feature is that they are afraid someone could create a skill which will ask the user to say "wait" and then spies out the room.
To encourage Amazon to implement this I would suggest 2 security features which could be implemented with this:
1) Alexa could play a beep every 3 seconds to remind the user that Alexa is waiting for a response
2) Every skill using the wait feature could have a mandatory user confirmation: "Yes, I have read and understood what that feature does in this skill"

Taking this to account could make the feature even cooler if it would not be necessary to say "wait". Alexa could just wait longer than 8 seconds.

It would be interesting to know if some AMAZON representative is reading this. if yes, what are your thoughts about it?

Would be cool to have push at least during open sessions...