Description
Duply is a platform that offers real-world design systems documented as DESIGN.md files, which are specifically tailored for AI coding agents. Users can browse a curated library of design systems, filtering by style, industry, surface, color, and typeface. Once a design is selected, users can copy a single DESIGN.md file, which their AI agent will use to build in that visual language, ensuring that the output is accurate and reflective of the chosen design.
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The DESIGN.md file is a single Markdown document that captures a complete design system as structured tokens. This includes elements such as colors with defined usage roles, a typography scale, spacing rhythm, border radii, shadows, and component specifications that reference those tokens. By using this format, AI coding agents can read the DESIGN.md and construct user interfaces that adhere to the specified design language, eliminating guesswork and ensuring a polished final product.
Duply's approach allows users to provide their AI agents with a working starter that goes beyond just the visual aspects of design. The platform ensures that every screen is built on mock data, with integrations wired through a single prompt. This means that users can expect a production-ready codebase that aligns with their design preferences right from the start.
In addition to the DESIGN.md files, Duply also exports ready-to-paste Tailwind v4 and CSS-variable token files, making it easier for developers to implement the design systems into their projects. The platform documents the design systems of real-world products, allowing users to access and utilize the design languages of well-known brands like Stripe, Linear, and Vercel. With Duply, users can confidently build applications that not only look great but also function seamlessly within their desired design frameworks.
- CategoryAI UI & UX Design Tools
- Pricing ModelFree
- DeploymentCloud
- PlatformsClaude Code, Cursor, v0
Duply's Core Features
311 design systems available
Free to use
Single Markdown file format
Structured design tokens
Compatible with AI coding agents
Production-ready codebase
Exportable Tailwind v4 and CSS-variable tokens
Curated library of design systems
How to use Duply?
Browse: explore the library of design systems available on Duply.
Select: pick a design that you love from the curated options.
Copy: use the copy button to grab the DESIGN.md file for your chosen design.
Integrate: paste the DESIGN.md into your project and instruct your AI agent to follow it.
Build: your AI agent will create UI components that match the selected design language.
Duply's Use Cases
- Web Development
- UI Design
- Prototyping
- Branding
- AI Integration




