Document/create mechanism to let bot use chat history

[githubcustomerserviceistrash]

I looked at the examples and I didn't see any where messages are properly stored and re-submitted, and your online sample doesn't seem to have this ability either. Is this working or do I have to hack it in?

For example:

A chatbot without conversational memory seems kind of neutered to me, so you probably want to make it very clear how your library enables that, if it's supported.