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Lifo

Run AI-generated code safely in-browser, zero infrastructure required.

Lifo is a browser-native operating system for safely running AI-generated code directly in the browser with Unix-like APIs. It provides a virtual filesystem, bash-style shell, and Node-compatible shims so agents, tutorials, and IDEs can execute code instantly without cloud infrastructure.

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More about Lifo

Lifo is a browser-native operating system designed specifically for safe AI code execution, mapping modern Web APIs to familiar Unix-like interfaces. Instead of provisioning cloud VMs, Lifo runs entirely in the browser tab, giving AI agents an instant, isolated sandbox with ~0ms boot time and zero infrastructure overhead.

Developers get a Linux-style environment in TypeScript, including a POSIX-inspired virtual filesystem backed by IndexedDB, a bash-like shell, and 60+ built-in commands. With compatibility shims for fs, path, process, and child_process, you can run Node-style scripts directly in the browser without server runtimes.

Lifo is ideal for:

AI agent sandboxing where generated code must run safely on the client
Interactive coding tutorials that require real shell commands and persistence
Browser-based IDEs needing filesystem, process, and networking primitives
Offline-first environments where state survives across sessions via IndexedDB

Released under the MIT license, Lifo provides an open, extensible foundation for building secure, instant, and persistent execution environments that feel like Unix, yet live entirely in the browser.