On a Doop design canvas every frame is real HTML, so Claude Code, Codex, Cursor, or any MCP client can design beside you as teammates watch every cursor and edit arrive live. Agents connect with one command or a one-click install and, once access is approved through OAuth, work as you and report their status and tasks on the canvas. The built-in Doop Agent has six roles, among them UX Lead, Copywriter, and Accessibility, picks up board cards and @mentions in comments, and runs on a connected ChatGPT subscription or an OpenAI, Claude, Gemini, or OpenRouter key. The editor covers frames, shapes, pen paths, rich text, flex layout, layers, pages, rulers, design tokens, and version history. Prototype mode wires clicks, hovers, and key presses to screen transitions, and the finished flow plays full screen or goes out as a shareable link. Marking a frame ready for dev can start an automation that queues agent steps, creates Linear tickets, or posts to Slack. Websites, live apps, GitHub repositories, and PDF pages import as starting points. Frames export as PNG, JPG, or PDF, or as public image links that re-render when the design changes. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.