Let your Twitch chat sends MQTT messages to your broker and mess with your domotic. Probably a bad idea, but could be very fun. Download the twitch.js example file and edit it to your needs.
NodeJS and NPM.
Then install 'tmi.js' and 'mqtt' modules with NPM.
You can also use a ready to use Docker container here: https://hub.docker.com/r/malantp/twitch2mqtt