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A comment on Devvm.dev: One VM for every project. Parent comment

Re:Devvm.dev: One VM for every project by evertheylen on Friday November 06, 2026 @03:45PM (#50398261)
Add me to the list, although I use podman containers (https://github.com/evertheylen/probox). I find that the hard part is not restricting the container/VM, but to make it "easy" to do things in the container that require something protected. How will you commit? Where does your agent run, and can it access github? How will you deploy? How will you SSH to a server?

Happy to hear what other people are thinking. It seems like putting an intercepting HTTP proxy is getting popular in other projects.

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Re:Devvm.dev: One VM for every project by mr_mitm on Friday November 06, 2026 @03:52PM (#50398359)
It feels like a fundamental problem. The more you restrict the agents, the less useful they become. The less you restrict them, the more dangerous they become.
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Re:Devvm.dev: One VM for every project by evertheylen on Friday November 06, 2026 @04:18PM (#50398667)
It makes sense, but a good system where you can say "give this VM access to repo X, branch Y, and server Z for the next 4 hours" without leaking any secrets into the VM would be a major improvement already.
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Re:Devvm.dev: One VM for every project by hollerith on Friday November 06, 2026 @04:30PM (#50398785)
Human coders and sys admins routinely make catastrophic mistakes, too, so it's not like we're facing a novel problem.
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Re:Devvm.dev: One VM for every project by mnahkies on Friday November 06, 2026 @04:04PM (#50398518)
On the git access part, I don't let my agent VMs have write access to GitHub currently. I do give them dedicated users on a self hosted gitea instance, and basically manage the blast radius through branch protection etc.

I think at a high level I'm trying to treat them as junior/intern employees where I give them enough permission to do their role, but not enough rope to hang themselves.

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Re:Devvm.dev: One VM for every project by evertheylen on Friday November 06, 2026 @04:16PM (#50398653)
I see. But then I have to debug some failing CI pipeline and the agent is quite good at going through the logs, so I give in and `gh auth login` anyway...
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Re:Devvm.dev: One VM for every project by mnahkies on Friday November 06, 2026 @05:19PM (#50399263)
I'm pretty sure you don't need to give it full access to accomplish that. It's possible to create scoped PAT etc. alternatively use a separate account. Ultimately your risk tolerance to decide
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Re:Devvm.dev: One VM for every project by lukax on Friday November 06, 2026 @04:37PM (#50398851)
You can have a separate GitHub account for your agent (GitHub ToS actually allows that since April) and that account can fork your repo and open PRs. This way it cannot do any real damage but can still push.

See this user for example: https://github.com/filippo-agent

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Re:Devvm.dev: One VM for every project by CharlieDigital on Friday November 06, 2026 @05:34PM (#50399404) 

    > GitHub ToS actually allows that since April
Do you have more background on this? My team actually ran into some issues with GH when we tried this earlier this year (felt like it was around that same time).
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Re:Devvm.dev: One VM for every project by lukax on Friday November 06, 2026 @07:39PM (#50400453)
https://docs.github.com/en/site-policy/github-terms/github-t...

3. Account Requirements

We have a few simple rules for Accounts on GitHub's Service.

You must be a human to create an Account. Accounts registered by "bots" or other automated methods are not permitted. We do permit machine accounts:

A machine account is an Account set up by an individual human who accepts the Terms on behalf of the Account, provides a valid email address, and is responsible for its actions. A machine account is used exclusively for performing automated tasks. Multiple users may direct the actions of a machine account, but the owner of the Account is ultimately responsible for the machine's actions. You may maintain no more than one free machine account in addition to your free Personal Account.

One person or legal entity may maintain no more than one free Account (if you choose to control a machine account as well, that's fine, but it can only be used for running a machine).

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Re:Devvm.dev: One VM for every project by zenoprax on Saturday November 07, 2026 @01:17AM (#50402124)
I usually commit outside the sandbox. Agents will see the git history and will emulate that but they can't sign the commits. If I authorize a series of commits I can just `git rebase -i HEAD~N` and adjust the messages and re-sign at the same time. With git hooks as a threat vector I'm considering just giving them read-only access to `.git` otherwise I can't safely go back in there without the sandbox.

I don't give it access to GH - it can read most things via API or web scraping fast enough and I manually run the commands I need outside the sandbox.

No need for SSH - it's running locally.

---

Given how many holes you're poking into the container I think you'd be better served with a real VM.

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