The open-source alternative to Claude Design. Local-first, web-deployable, BYOK at every layer — 12 coding-agent CLIs auto-detected on your PATH (Claude Code, Codex, Devin for Terminal, Cursor Agent, Gemini CLI, OpenCode, Qwen, GitHub Copilot CLI, Hermes, Kimi, Pi, Kiro) become the design engine, driven by 31 composable Skills and 72 brand-grade Design Systems. No CLI? An OpenAI-compatible BYOK proxy is the same loop minus the spawn. In other words copy designs of websites you like and have design do all the heavy lifting when it comes to coding. https://github.com/nexu-io/open-design