StereOS

stereOS is a purpose built Linux operating system for running AI coding agents inside sandboxes. Rather than giving an agent access to the host machine, it boots a disposable virtual machine, injects credentials and launches the agent, isolated from everything else. The vendor says it uses full virtual machines instead of containers or microvms, so each agent gets its own kernel, memory, disk and network, with support for secure boot, FIPS compliance, GPU passthrough for local models through ollama or vLLM, and bare metal deployment. The tool is aimed at developers and enterprises that want to run coding agents with isolation, cryptographic attestation and audit trails. A command line tool called masterblaster, run as mb, manages the workflow. Users pull a pre built VM image called a mixtape, such as one that includes the OpenCode agent, describe the agent and prompt in a jcard.toml file, then boot the machine, connect to it over SSH and destroy it when finished. A background daemon manages the VM processes. The site publishes documentation and install instructions but no pricing page or plan prices.