Darby is an open source Hugo docs theme with the polish of the paid docs platforms: clean typography, dark mode, full-text search, code blocks with copy and filename tabs, callouts, tabs, beautifully rendered mermaid diagrams, auto sidebar and TOC.

No Node build, no CSS framework. Add as a Hugo module, configure colors and fonts in hugo.toml, write Markdown. Static output, host anywhere free.

Also has an AI docs assistant that runs entirely in the browser: Llama 3.2 1B on WebGPU, no backend, no API keys.

Demo: https://iamit.in/darby/

MIT licensed.