Stanford Releases JAI: One-Command Linux Sandbox for AI Agents — No Docker, No VMs, Copy-on-Write Isolation

Stanford University / Hacker News·high signal

Stanford's Secure Computer Systems group released JAI, a lightweight Linux sandbox that lets AI agents work with full read/write in the working directory while isolating the rest of the filesystem via copy-on-write. No Dockerfiles, no images — just one command. The tool fills the gap between giving agents your real account and stopping to build a container. 349 points and 192 comments on HN, with practitioners calling it the missing piece for safe daily agent use.