I don't know if I want to create an ad-hoc list of permissions. What I would like would be something like take a snapshot of my current workspace in a VM. Run claude there and let it go wild. After the end of the session, kill the box. The only downside is potentially syncing the claude sessions/projects. But I don't think that'd be too difficult.
I recently blogged about how I do this using MicroVMs on NixOS: https://michael.stapelberg.ch/posts/2026-02-01-coding-agent-...
> take a snapshot of my current workspace in a VM. Run claude there
Sounds like docker + overlayfs might fit the bill, as long as there's a base image that is close enough to what you need.
I don't think there should be One True Way how to run these, everyone can set it up in a way that best fits their workflow.
both Docker and bubblewrap are not secure sandboxes. the only way to have actually isolated sandboxes is by using VMs
disclaimer: i work on secure sandboxes at E2B
What about cgroups? I know they are not exactly analogous, but to me that seems like a pretty decent solution.
No disagreement from me. From the article:
> Bubblewrap and Docker are not hardened security isolation mechanisms, but that's okay with me.
Edit to add: my understanding is the major flaw in this approach is potential bugs in Linux kernel that would allow sandbox escape. Would appreciate your insight if there are some easier/more probable attack vectors.
Do you have more information on how to set up such VMs?
for personal use, many ways: Vargant, Docker Sandbox, NixOS VMs, Lima, OrbStack.
if you want multi-tenant: E2B (open-source, self-hosted)
Hashicorp has mostly abandoned Vagrant, so I'd avoid it.
> What I would like would be something like take a snapshot of my current workspace in a VM.
Sounds like you may be interested in Qubes OS, which runs everything in VMs.