The microsandbox-rb gem provides native bindings to the microsandbox runtime via a Rust extension (magnus). It spins up real microVMs (not containers) in under 100ms, runs standard OCI (Docker) images, and gives you full control over command execution, the guest filesystem, networking, volumes, snapshots, SSH, and secrets — all from an idiomatic, synchronous Ruby API. No daemon, no server to connect to: the runtime is embedded directly in your process.