I just tried it out again. It seems like you can disable the chat bot integration by adding this to the config:
"agent": {
"enabled": false
}
However from the documentation[1] I can't see a way to disable the "AI" predictions button (which asks you to sign in to their online "AI" service with your GitHub account). Am I missing something?
[1] https://zed.dev/docs/configuring-zed#edit-predictions