npx skills add ...
npx skills add openai/plugins --skill geistdocs
Expert guidance for Geistdocs, Vercel's documentation template built with Next.js and Fumadocs — MDX authoring, configuration, AI chat, i18n, feedback, deployment. Use when creating documentation sites, configuring geistdocs, writing MDX content, or setting up docs infrastructure.
npx skills add openai/plugins --skill geistdocs
You are an expert in Geistdocs, Vercel's production-ready documentation template built with Next.js 16 and Fumadocs. It provides MDX authoring, AI-powered chat, i18n, feedback collection, search, GitHub integration, and RSS out of the box. Currently in beta.
This clones the template, prompts for a project name, installs dependencies, and removes sample content.
| Variable | Description |
|---|---|
AI_GATEWAY_API_KEY | Powers AI chat; auto-configured on Vercel deployments |
NEXT_PUBLIC_VERCEL_PROJECT_PRODUCTION_URL | Production domain (format: localhost:3000, no protocol prefix); auto-set by Vercel |
Pages auto-route from the content/docs/ directory: content/docs/my-first-page.mdx becomes /docs/my-first-page.
geistdocs.tsx)The root config file exports these values:
Every MDX file requires frontmatter:
Language specification with special attributes:
| Attribute | Effect |
|---|---|
title="filename" | File path header |
lineNumbers | Show line numbers |
[!code highlight] | Highlight line |
[!code word:term] | Highlight term |
[!code ++] / [!code --] | Diff additions/deletions |
[!code focus] | Focus line |
Supports flowcharts, sequence diagrams, and architecture diagrams.
Root-level wrapper extending Fumadocs' RootProvider. Provides toast notifications (Sonner), Vercel Analytics, and search dialog. The AI sidebar auto-adds padding on desktop; mobile uses a drawer.
Toast API: toast.success("msg"), toast.error("msg") via Sonner.
Set github in config → auto-generates edit links in the ToC sidebar. No env vars or API keys needed.
Interactive widget in ToC sidebar. Collects message, emotion emoji, name, email. Auto-creates structured GitHub Issues with labels.
Uses Fumadocs' language-aware routing with [lang] URL segments. Default language has no prefix; others get prefix (e.g., /cn/docs/getting-started).
File naming: getting-started.mdx (en), getting-started.cn.mdx (cn), getting-started.fr.mdx (fr).
Auto-translate: pnpm translate [--pattern "path/**/*.mdx"] [--config file.tsx] [--url "api-url"]
Auto-generated at /rss.xml. Requires NEXT_PUBLIC_VERCEL_PROJECT_PRODUCTION_URL and title export. Customize via frontmatter lastModified: 2025-11-12.
Append .md or .mdx to any URL to get raw Markdown. Useful for AI chat platforms (ChatGPT, Codex, Cursor) and LLM context ingestion.
Endpoint at /llms.txt returns ALL documentation as plain Markdown in a single response. Follows the llms.txt standard.
AI chat assistant using openai/gpt-4.1-mini via Vercel AI Gateway. Features: search_docs tool, source citations, IndexedDB chat history, suggested prompts, file/image upload, Markdown rendering. Access via navbar button or ⌘I / Ctrl+I.
Button in ToC sidebar opens docs page in external AI platforms (Cursor, v0, ChatGPT, Codex).
pnpm build, Output: .nextAI_GATEWAY_API_KEY, NEXT_PUBLIC_VERCEL_PROJECT_PRODUCTION_URL)| Command | Description |
|---|---|
npx @vercel/geistdocs init | Create new project |
pnpm dev | Start dev server |
pnpm build | Production build |
pnpm translate | Auto-translate content |
import { BookHeartIcon } from "lucide-react";
// Header branding
export const Logo = () => (
<span className="flex items-center gap-2 font-semibold">
<BookHeartIcon className="size-5" />
My Docs
</span>
);
// Navigation links
export const nav = [
{ label: "Blog", href: "/blog" },
{ label: "GitHub", href: "https://github.com/org/repo" },
];
// Site title (used in RSS, metadata)
export const title = "My Documentation";
// AI assistant system prompt
export const prompt = "You are a helpful assistant for My Product documentation.";
// AI suggested prompts
export const suggestions = [
"How do I get started?",
"What features are available?",
];
// Edit on GitHub integration
export const github = { owner: "username", repo: "repo-name" };
// Internationalization
export const translations = {
en: { displayName: "English" },
cn: { displayName: "中文", search: "搜尋文檔" },
};---
title: My Page Title
description: A brief description of this page
---
Your content here...