Our designer built an operating system with Cursor

Rio, head of design at Cursor, showcases 'Rios' — a personal vibe-coded project built entirely with Cursor that resembles a retro Mac OS-inspired operating system running in the browser. It includes a time-traveling browser powered by the Wayback Machine and AI generation, a photo booth app with shader effects, a working iPod, a Mario-style game, a fake Notion, a YouTube player with VHS effects, and 'baby Cursor' — a functional prototype of the Cursor editor used to test UI ideas and model behaviors. Rio reflects on how AI tools like Cursor are blurring the lines between designers, engineers, and PMs, enabling anyone with curiosity to build polished, soulful software by breaking big ideas into smaller prompts and iterating quickly.