Claude Design went viral and stayed closed; here is the open reply

What it does

Open Design is a desktop app that treats your existing coding-agent CLI—Claude Code, Codex, Cursor, or any of 20+ others—as the creative engine. You type a brief, pick a design system, and the agent generates real artifacts: single-page HTML prototypes, live dashboards, pitch decks, images, and MP4 motion graphics, all exportable to HTML, PDF, PPTX, or MP4. Everything runs locally through a daemon that spawns the agent in a real project folder with filesystem access, sandboxed previews, and SQLite persistence.

The interesting bit

Instead of bundling its own model, the app auto-detects whatever coding agent is already on your PATH and wires it in via an MCP server; if you have no CLI, a built-in BYOK proxy normalizes streams from Anthropic, OpenAI, Google, or Ollama back into the same loop. It also imports Claude Design export ZIPs so you can pick up where Anthropic left off.

Key highlights

• 150 built-in brand-grade design systems (Linear, Stripe, Apple, etc.) and 261 plugins
• 137+ skills covering prototypes, decks, images, video, and motion graphics (HyperFrames)
• Sandboxed iframe preview with real CSS and fonts; exports to HTML, PDF, PPTX, MP4
• Local-first: SQLite projects, daemon spawns agents on-disk, no cloud lock-in
• Imports Claude Design exports and runs on macOS and Windows

Caveats

• The project is iterating fast on main; the README explicitly flags aggressive shipping and asks for bug reports
• Some local runtimes like ComfyUI are listed as planned adapters, not yet available
• Every agent adapter carries a Windows ENAMETOOLONG fallback, a tell that cross-platform CLI spawning is still being smoothed out

Verdict

If you want Claude Design’s artifact-first workflow without the cloud lock-in, this is worth the disk space. If you don’t already use a coding-agent CLI, you’ll lean heavily on the BYOK proxy and miss half the local-first charm.