State machine in applications using the Chat API

[piotrek-k]

What is the best way to manage the state machine within a chatgpt based application? My app apart from being general purpose conversational application, need is some specific cases generate some strictly defined output. I'm wondering how can I detect that the state should be changed?

Example:
Let's say we're building a chatbot that can play text games (like tic-tac-toe). Interaction with this bot starts with normal conversation, then when user wants to play this game, state is changed from CONVERSATIONAL_MODE to GAME_MODE. Being in GAME_MODE, the bot can only generate a tic-tac-toe board and nothing else until the game ends or the user explicitly tells the bot to stop.

So there are two problems to solve here:

1. How to detect when to change state
2. How to enforce certain behaviour of the chatbot when it is in a certain state? How to add a system message to the chat history?