You already pay for one AI tool. This one makes it design for you, and costs nothing.
OpenDesign is the open-source alternative to Claude Design — a local-first desktop app for macOS and Windows that hands the design job to the coding agent already running on your machine.
github.com/nexu-io/open-design — Apache-2.0, 93.6k stars, 10.7k forks.
No new subscription. It works BYOK, driving what you already have: Claude Code · Codex · Cursor · DeepSeek Harness · Qwen · Copilot · Kimi and 26 local command-line agents, or any OpenAI-compatible endpoint.
And it gives you real files, not share links: HTML · PDF · PPTX · MP4, saved on your own disk.
🎨 What it builds
- Prototypes — web, desktop and mobile, previewed in a sandboxed frame before anything is exported.
- Live dashboards and artifacts — working pages, not flat mockups.
- Slide decks — straight out as
.pptx, ready to open and present. - Images and video, plus HyperFrames motion graphics for the moving pieces.
🧩 The part that makes it yours — DESIGN.md
Your brand written as a plain file the agent reads: colours, type, spacing, rules. Every artifact it builds afterwards comes out in your design system instead of generic AI styling.
Around it sit composable skills, rendering templates and plugins — a folder of capabilities your agent can read, write and remix, rather than a closed feature list somebody else decides for you.
Why it matters: the loop Claude Design keeps behind a paywall — discover the brief, lock the direction, stream the artifact, critique it, deliver — is here as an open filesystem your own agent drives. The intelligence you already pay for; this gives it hands. 
i hope it benefits all the community
!