Hi,

After a few hours trying to figure out why alexa raised an error on my directive response instead of speeching configured prompt for missing slots, It turned out that alexa-app includes outputSpeech object in its reply, which seems exactly to be the problem. Given a Dialog.Delegate directive telling to rely only on model dialogs, Alexa expect not to have outputSpeech attribute besides this directive.

So I patched this with an ugly delete before replying, but I guess fixing your response construction might benefits to some other users :-)

The monkey patch, within any alexa-app handler getting response object:

			if (response.response.response.outputSpeech) {
				delete response.response.response.outputSpeech
			}