Lyngvi – A Hardened Sandbox for AI

Lyngvi is an MIT-licensed, agent-agnostic sandbox for running autonomous coding agents against your own repositories on macOS and Linux via Podman, driven from a JavaFX desktop app or a CLI that share one Java core. It gives each conversation its own container with no default network route (egress only through an allowlisted Squid proxy), a copied working tree with a fresh .git, and secrets held in a gateway sidecar, with changes returned as host-classified patches (apply, hold, reject) committed only to a working branch. It ships reference adapters for Claude Code and OpenCode, supports local model servers through the proxy, and pins its base images by digest.