A limitation with this setup is you can't let your agent/Linux user run containers with docker. Adding a user to the `docker` group effectively grants the user full root privileges [1], so the secure way is to setup docker in rootless mode. It's doable, but in my experience it's hard to setup (I find it complex with podman as well).

> Until I'm shown otherwise it seems like a good compromise

Agreed. In my case I went a long way running the Pi harness in a (simple, rootfull) docker container. As the project I worked on relied on a standardized docker compose stack for local dev and testing, I realized I could automate more if only my agent could use docker. Ultimately, the need for docker for my agent grew when testcontainer [2] was introduced in the project. That's when I finally took the time to setup a VM with incus [3], and now I can let the agent go wild with docker inside the VM.

This is at least one example where more isolation is required. Otherwise, the dedicated Linux user, if it works for you, is by far the easiest and most pragmatic solution IMO.

[1] https://docs.docker.com/engine/install/linux-postinstall/#ma... ; https://wiki.debian.org/Docker

[2] https://testcontainers.com/getting-started/

[3] https://linuxcontainers.org/incus/docs/main/