It seems all AI stuff happens through the “Assistant Panel” and nothing is sent as long as you don’t interact with it.

It seems you can disable the assistant feature it is opt-out though

I haven’t used it but Zed seems like what you might be looking for.

Here’s what I know:

• Open Source
• Runs natively on Mac and Linux (no Windows support yet)
• Made by the same folks who made Atom

It’s a little new but It looks like it’s worth a try