Duply is a design-system library for people building websites, apps, and SaaS products with AI coding tools. It turns real product interfaces into practical DESIGN.md files that describe how a design system actually feels and works, from typography, spacing, colors, components, layout patterns, and interaction rhythm to the overall visual direction. Instead of making your AI agent invent a style from a vague prompt, you can choose a reference from the Duply library, copy the DESIGN.md, and use it as a clear design guide inside your workflow. This helps AI-generated interfaces look more consistent, polished, and intentional from the first build. Duply is especially useful for founders, developers, designers, AI builders, and vibe coders who want faster UI direction, fewer random design choices, and less back-and-forth prompt tweaking.
