I don't know if I want to create an ad-hoc list of permissions. What I would lik...

secure · 2026-02-03T20:47:39 1770151659

I recently blogged about how I do this using MicroVMs on NixOS: https://michael.stapelberg.ch/posts/2026-02-01-coding-agent-...

senko · 2026-02-03T20:37:43 1770151063

> 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.

ushakov · 2026-02-03T20:51:28 1770151888

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

senko · 2026-02-03T20:59:24 1770152364

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.

gf000 · 2026-02-03T22:34:36 1770158076

What about cgroups? I know they are not exactly analogous, but to me that seems like a pretty decent solution.

its-summertime · 2026-02-03T21:36:53 1770154613

Do you have more information on how to set up such VMs?

ushakov · 2026-02-03T21:46:37 1770155197

for personal use, many ways: Vargant, Docker Sandbox, NixOS VMs, Lima, OrbStack.

if you want multi-tenant: E2B (open-source, self-hosted)

eikenberry · 2026-02-03T23:45:32 1770162332

Hashicorp has mostly abandoned Vagrant, so I'd avoid it.

fsflover · 2026-02-03T23:31:19 1770161479

> 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.