stupid answers to snappy questions
That Snapchat+ sidekick made me think of Mad Magazine's snappy answers to stupid questions, e.g. the answer you only thought of when it was too late to use in the conversation. So you wire up ChatGPT to a two-pane chat window. Both panes have the same stdin -- the bot's reply on the left doesn't go anywhere, instead you can select some or all of it and then click a button to copy it to the real chat on the right. Voila, you are now lightning-quick-witted!
For the benefit of trolls everywhere, can also include a poison button for inserting a jailbreak prompt on the left, in case your opponent (I mean, chat-partner) is slow to take offense.