Configuring Book

Options live in theme.yaml's config_schema and are stored under the book key in data/theme-config.json (editable from the admin Theme Settings tab). Names match upstream's Book* params where Dune allows it.

Site options

Key	Type	Default	Upstream	What it does
`book_theme`	select	`auto`	`BookTheme`	`auto` / `light` / `dark` — compiled as `data-book-theme` on `<html>` (upstream bakes one mixin into CSS at build time; this port ships all three)
`book_search`	toggle	`true`	`BookSearch`	Live search box at the top of the sidebar (`/` or ⌘/Ctrl+K to focus)
`book_toc`	toggle	`true`	`BookToC`	Right-hand table of contents from h2–h4
`book_logo`	text	(empty)	`BookLogo`	Optional logo image URL next to the site title
`book_section`	text	`docs`	`BookSection`	Sidebar root section route; `*` for all top-level sections
`language_labels`	select	`code`	—	`code` or native `name` via `Intl.DisplayNames`
`copyright`	text	(empty)	`Copyright` / site copyright	Centred line under the page footer

Example:

{
  "book": {
    "book_theme": "auto",
    "book_search": true,
    "book_toc": true,
    "book_section": "*",
    "copyright": "© 2026 Acme Docs"
  }
}

Per-page frontmatter

Key	Effect
`bookToC: false`	Hide the right-hand ToC for this page only

There is no freeform accent colour picker — upstream hugo-book doesn't have one either. For a Dune-native docs theme with curated colour schemes, see Caravan.