Building a Tic-Tac-Toe Game in Under 2 Minutes with CreateOS Sandbox

CreateOS Sandbox lets an AI coding agent build, run, and deploy a real application inside an isolated micro-VM, without a developer writing the code by hand. This video shows an AI agent building a working tic tac toe game from a single instruction, in under two minutes, inside a CreateOS Sandbox. What happens in this video: A sandbox is created from the CreateOS dashboard The agent is given one instruction: build a tic-tac-toe game It checks dependencies, writes the server code, and starts it It stops mid-task to request permission before accessing something outside its expected scope It verifies its own server is running, then the live app is opened at a public URL What is CreateOS Sandbox? CreateOS Sandbox runs each workload as a Firecracker micro-VM with its own guest kernel, not a shared-kernel container. It provides an in-browser root shell with no SSH key required, and is built to run AI agents and AI-generated code safely. Frequently asked questions Can an AI agent build and deploy an app without human help? Yes. In this video, an AI coding agent (OpenCode) is given a single instruction and independently writes, runs, and verifies a working application inside a CreateOS Sandbox. Does the AI agent ask permission before doing anything risky? Yes. The agent pauses and requests explicit permission (allow once, allow always, or reject) before accessing a resource outside the task's obvious scope. Do I need an SSH key to use CreateOS Sandbox? No. Sandboxes can be accessed through an in-browser root shell without an SSH key. Is CreateOS Sandbox production-ready? CreateOS Sandbox is currently in alpha. Try it: createos.sh/app/sandbox #AIagents #CreateOS #sandboxed #buildinpublic #AItools