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Show HN: Ash, an Agent Sandbox for Mac

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Re: Show HN: Ash, an Agent Sandbox for Mac

#12

Post by miltieIV2 »

No way to submit bug reports other than email - I'll forward this. How about at least a GitHub stub repo for Issue reports? Lot's of permissions (but missing "Full Disk Access" in the UI setup flow) I didn't know it also needed FDA until I did "ash status". Why is there a Login? GitHub login broken - 404.

No Source - This is a security tool that can't be audited. You had your 5 minutes on HN, but you'll need the community for Linux and Windows.

Yeah, overloaded name - how about AgSh.app / agsh? It's not too late to fix it.

Re: Show HN: Ash, an Agent Sandbox for Mac

#13

Post by amsha »

ThroneCreator wrote: post #3

One thing that comes to mind is whether the sandbox can restrict outbound network access per process or per command. That could be useful for preventing agents from silently exfiltrating data while still allowing limited API calls.

Yeah I like the idea of allowing the sandbox to restrict network connections to specific processes. I'll put it on the roadmap: https://github.com/Ash-Sandbox/bugs/issues/1

Re: Show HN: Ash, an Agent Sandbox for Mac

#14

Post by amsha »

cjbarber wrote: post #9

See also various sandbox tools I and others (e.g. jpeeler) have collected: https://news.ycombinator.com/item?id=47102258

I'd be interested in seeing a breakdown in which ones use:

- VMs - Containers - sandbox-exec (macOS builtin tool) - Endpoint Security + Network Extension (AFAIK this is just Ash but it would be good to see company here)

Re: Show HN: Ash, an Agent Sandbox for Mac

#16

Post by amsha »

miltieIV2 wrote: post #12

No way to submit bug reports other than email - I'll forward this. How about at least a GitHub stub repo for Issue reports? Lot's of permissions (but missing "Full Disk Access" in the UI setup flow) I didn't know it also needed FDA until I did "ash status". Why is there a Login? GitHub login broken - 404. No Source - This is a security tool that can't be audited. You had your 5 minutes on HN, but you'll need the comm…

Good idea about the GitHub stub repo, I've added it here: https://github.com/Ash-Sandbox/bugs.

Your feedback about permissions is something I'm working on fixing now. Apple requires multiple permissions for Endpoint Security and Network Extension APIs and the current setup process doesn't walk users through that process as elegantly as I would like it to.

Re: Show HN: Ash, an Agent Sandbox for Mac

#17

Post by amsha »

jakejmnz wrote: post #4

Looks cool, I'll give it a shot. Is this any different from /sandbox command?

Yeah, the underlying sandbox technology between Ash and CC is fundamentally different.

Ash is built on the Endpoint Security and Network Extension APIs. Together, they cover the full gamut of potential sandbox escapes, and it's a simple process to update sandbox rules while the sandboxed process is running.

Claude Code sandbox is built mainly on sandbox-exec, an older macOS sandbox technology. It works for filesystem and IO device control, but it can only filter network requests by IP address. CC uses an application-level network proxy as a workaround, but not every network client respects the HTTP_PROXY env variable it requires. There are other workarounds in CC sandbox for complex use cases (e.g. dangerouslyDisableSandbox) that Ash does not need.

Re: Show HN: Ash, an Agent Sandbox for Mac

#18

Post by dhblumenfeld1 »

this is great. The environment variable control is particularly interesting to me. I've been working on a related problem but different approach: encrypting/decrypting secrets using the Mac's secure enclave (https://github.com/keypo-us/keypo-wallet/tree/main/keypo-sig...). The two approaches seem complementary: Ash controls the perimeter, encrypted vaults protect the values themselves.
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