Overview

A self-hosted documentation viewer built into the sandbox at /docs. It reads markdown files from the docs/ directory and renders them with a sidebar, syntax-highlighted code blocks, and a table of contents.

Drop a .md file in the docs/ folder and it shows up here. No config, no frontmatter required. The file system is the API.

How It's Organized

The docs directory structure maps directly to the sidebar:

• Files at the root of docs/ appear under "General"
• Subdirectories become collapsible categories (e.g., docs/stack/ becomes "Stack", docs/features/ becomes "Features")
• Numeric prefixes control sort order (01-progress.md comes before 02-something.md) but get stripped from the URL
• Files starting with _ are excluded (used for templates)

The title for each doc is pulled from the first # heading in the file. If there isn't one, it falls back to converting the filename to title case.

What You See

• Sidebar -- Collapsible categories with active state highlighting. On mobile it becomes a slide-out drawer.
• Content area -- Rendered markdown with prose styling. Tables, code blocks, blockquotes, lists all work.
• Code blocks -- Syntax highlighted with a VS Code Dark+ theme.
• Table of contents -- Appears on wide screens, tracks scroll position.
• Dark mode -- The entire viewer uses a dark color scheme with Bitter serif headings.

Architecture

Uses a Next.js route group (app/(docs)/) so the docs layout doesn't affect other routes. Docs are server-rendered at build time using next-mdx-remote/rsc. All styling lives in a single CSS Modules file, no Tailwind or component library.