better-auth/docs/app/layout.config.tsx

import type { DocsLayoutProps } from 'fumadocs-ui/layout';
import type { HomeLayoutProps } from 'fumadocs-ui/home-layout';
import { pageTree } from '@/app/source';

// shared configuration
export const baseOptions: HomeLayoutProps = {
  nav: {
    title: 'Better Auth',
  },
  links: [
    {
      text: 'Documentation',
      url: '/docs',
      active: 'nested-url',
    },
  ],
};

// docs layout configuration
export const docsOptions: DocsLayoutProps = {
  ...baseOptions,
  tree: pageTree,
};