OpenDesign is an open-source, local-first Claude Design and Figma alternative for macOS and Windows. It allows AI coding agents (DeepSeek Harness, Claude Code, Cursor, Antigravity) to generate web prototypes, multi-slide decks, mobile apps, and DESIGN.md design systems directly in clean HTML/CSS/TSX.

How does OpenDesign connect to coding agents?

OpenDesign connects to 26+ distinct CLI coding agent runtimes—including DeepSeek Harness (dsh), Claude Code, Cursor, Codex, and Antigravity CLI—allowing agents to read, write, and remix design tokens, templates, and rendered UI artifacts.

OPEN_DESIGN_STUDIO.exe

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DESIGN & AGENT PROTOTYPING

OpenDesign: The Open-Source Claude Design & Figma Alternative ⚡

How to use OpenDesign to turn your coding assistant into an agency-grade design studio: generating web prototypes, slide decks, mobile UIs, and DESIGN.md contracts.

AEO SUMMARY Figma for the Agent Era

OpenDesign is the open-source alternative to Claude Design and Figma. Rather than forcing designers to push static vector pixels on a canvas, OpenDesign produces single-page interactive artifacts in real CSS, HTML, and React components shaped by an explicit DESIGN.md design system contract. It runs natively alongside 26+ coding agent runtimes including DeepSeek Harness (dsh), Claude Code, and Antigravity.

DESIGN-TO-CODE SPEED The DESIGN.md Standard

Lock your brand tokens (typography, color palettes, spacing, border radii, and button states) into a single DESIGN.md file in your repository root. Every AI agent that generates code will adhere strictly to your design system, eliminating 90% of UI rework.

Artifact Formats in OpenDesign Studio

Web Prototypes: Interactive single-page web experiences rendered in sandboxed iframes.
Multi-Slide Decks: Presentation decks with speaker notes and PDF/PPTX export.
Mobile App UIs: Pixel-perfect iOS and Android component previews.
HyperFrames Motion: Animated graphics and generative video transitions rendered in code.

MASTER PROMPT

1-Click DESIGN.md Brand Design System Generator

Paste this prompt into Claude or OpenDesign to extract and compile an exhaustive DESIGN.md design system for your website or product:

OPEN_DESIGN_TOKEN_ENGINE

Act as a Principal Design Systems Architect and Frontend Engineer. Analyze my product / website [DESCRIBE PRODUCT OR PASTE STYLES] and generate a complete, production-grade DESIGN.md specification:

1. CORE BRAND TOKENS:
- Color Palette: Primary, Secondary, Background, Surface, Border, Ink/Text, Accent, and Status colors (Hex + CSS Variable names)
- Typography: Primary font family, Monospace/Code font, Heading scale (H1-H4 with font-size, line-height, letter-spacing, and font-weight)
- Elevation & Shadows: Flat retro borders, neumorphic offsets, or box-shadow tokens

2. COMPONENT DESIGN CONTRACTS:
- Button States: Primary, Secondary, Accent, Disabled, Hover, and Active click transforms
- Card / Window Containers: Border width, border-radius, padding scales, and header titlebars
- Badge & Tag Specs: Micro-typography, background tints, and border contrast

3. LAYOUT & RESPONSIVENESS:
- Max-width containers, breakpoint grid rules, and zero-horizontal-scroll enforcement

Output the result as a clean, ready-to-save DESIGN.md document.

GITHUB REPO open-design

View on GitHub ->

Open-source Figma and Claude Design alternative tailored for coding AI agents.

Prerequisites: Node.js 18+, npm / pnpm

# 1. Clone the open-design repository
git clone https://github.com/nexu-io/open-design.git
cd open-design

# 2. Install dependencies
npm install

# 3. Start local design canvas
npm run dev

# 4. Connect Claude Code or Cursor via MCP
npx @open-design/mcp-server

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