Maybe I'm wrong, but I think that a robot can do a replay...
There is a [method](https://github.com/github/hubot/blob/17e48f8ca57c5e23a849073970fe3285c44cd9e3/src/robot.coffee#L334)

I just follow [this documentation](https://github.com/github/hubot/blob/17e48f8ca57c5e23a849073970fe3285c44cd9e3/docs/scripting.md#events)