Your Cloud should come with an app builder
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Railway announces dev.new, a tool where you describe an app idea and an agent builds, previews, tests, and deploys it, all in one place, backed by a full VM with persistent disk. The launch demo has an agent building and shipping a real-time multiplayer FPS game in twenty minutes from a single prompt, including generating all assets, testing gameplay in a real browser, and deploying via a wrapper called ship. Deployed apps become regular Railway projects, so databases, custom domains, and scaling are available afterward.
Questions this post answers
What is dev.new from Railway and how does it work?
Dev.new is a Railway product where you describe an app idea and an agent builds, previews, and deploys it from the same place. It runs on a full VM with a persistent disk, using a baked template with Vite, React 19, Tailwind CSS v4, and TypeScript. The Railway Agent edits files, runs Playwright tests in a real browser, and deploys with a tool called ship, which turns the working directory into a live Railway service with a public URL. Developers testing agent driven app building can follow tools like dev.new as they evolve on daily.dev.
Can an AI agent build and deploy a real-time multiplayer game automatically?
Yes, an agent built and deployed a real-time multiplayer first-person shooter in about twenty minutes from a single prompt on Railway's dev.new. It generated all assets including the map, textures, and sounds, wrote a server to track player state and hit detection over WebSockets, tested it by spawning two browser sessions to simulate a match, then deployed it and reran the playtest against the live URL. See how far agentic app builders like this have come by tracking coding agent releases on daily.dev.