Show HN: Brig, an Open-Source MicroVM Sandbox for AI Coding Agents

Summary

NOFire AI has open-sourced Brig under the Apache 2.0 license as a microVM sandbox for AI coding agents. It runs on Apple Silicon Macs and Linux systems using x86_64 or ARM processors, and gives each agent its own Linux kernel. Users choose which project files and credentials to share; the shared project remains writable, while the default configuration permits internet access. After installation, `brig run claude` launches Claude Code inside the sandbox. The project says all components are Apache 2.0 licensed, including its microVMM, which contains fewer than 20,000 lines of code. Brig grew out of work on controlled autonomy for production remediation and is also intended for running coding agents with automatic approval on personal machines. Its README documents installation, architecture, and the security model.