What is fumadocs-shadcn?

Fumadocs-shadcn is a small example project that helps developers combine two popular design tools without them stepping on each other's toes. If you are building a documentation website and want the polished look of Shadcn UI alongside the documentation-specific features of Fumadocs, this repo shows you how to make them play nicely together. The problem it solves is a behind-the-scenes conflict. Both Fumadocs and Shadcn UI use CSS variables, essentially named settings for colors, borders, and backgrounds, to control their appearance. When you use them on the same site, they can accidentally overwrite each other's settings, causing your site's colors or borders to look wrong. This project demonstrates a straightforward workaround: adding a prefix to Fumadocs' variable names so they no longer collide with Shadcn's. It also shows how to move some default color settings to specific page layouts rather than applying them globally. The people who would use this are developers already working with both of these tools in a React or Next.js environment. For example, if you are a founder building a product landing page using Shadcn components, and you want to add a customer-facing help center or API documentation section using Fumadocs, this repo provides the exact configuration tweaks needed to keep your visual styling consistent across the entire application. What is notable about this project is that it is purely a practical guide rather than a standalone application. It doesn't offer a complex architecture or deep tooling, it just provides the specific code snippets and placement instructions needed to resolve a common integration headache. By keeping the solution focused on configuration changes, it allows you to continue using both design systems' default behaviors without having to rewrite or heavily modify either one.