I've been working on this open source project for a few months, but just put up a product website today, actually: https://yaac.dev/

You can run the agents either sandboxed (in kubernetes via kind) or containerless ("free reign", perhaps) on the Linux box, and host them on your tailnet. The desktop app gives you either a chat or terminal interface, and you can access them via the browser (e.g. on mobile), too.

One limitation is that it assumes you're working with a github repo, and each agent session gets its own clone to work with. Feel free to shoot me an email (link in github) with any questions or specific needs and I'd be happy to try to help you.