Oneline
Google I/O HackathonOneline: software for one. Describe the exact tool you need in one line, and get it running on your phone in under a minute, built for the single person asking instead of a market. A planner trims the request, three candidate tools build in parallel inside Gemini Managed Agents sandboxes, a three-layer judge scores each (functionality via Playwright inside the sandbox, UX clarity, design coherence), a deterministic selector picks the winner, and it deploys to Cloud Run with a QR code. Each losing candidate's mistakes become lessons that improve the next build. Not an app builder like Lovable or V0 which ship to a market; Oneline builds a disposable tool for the one person who asked, used, and throws it away.
