# Librarian > Use Librarian to fetch and search up-to-date developer documentation from GitHub and websites so answers are grounded in real docs. - Skill: `iannuttall/librarian` (Agent Skill) - Install (CLI): `npx skillmds@latest add iannuttall/librarian` - Raw SKILL.md: https://api.skillmd.com/api/skills/iannuttall/librarian/raw - Safety review: WARNING - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Docs & Writing - Author: iannuttall (https://skillmd.com/u/iannuttall) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/iannuttall/librarian --- # Librarian skill - Purpose: fetch and search developer docs on your machine so answers are based on real sources - Best use: when you need accurate API details, code examples, or version‑specific docs - Prereqs: Bun is required at runtime even if installed via npm/pnpm; install it if missing - Check package manager: `command -v bun || command -v pnpm || command -v npm` - Install (global): prefer npm by default, but use what exists - If `bun` exists: `bun add -g @iannuttall/librarian` - Else if `pnpm` exists: `pnpm add -g @iannuttall/librarian` - Else: `npm i -g @iannuttall/librarian` - Install Bun (if missing): `curl -fsSL https://bun.sh/install | bash` - Setup: run `librarian setup` and add tokens if you need private GitHub or gated models - Verify: `librarian version` - Add a repo: `librarian add owner/repo --docs docs --ref main` - Add a site: `librarian add https://example.com/docs` - Ingest: `librarian ingest --embed` - Find a library first: `librarian library "nextjs"` or `librarian library --version 16.x "nextjs"` - Search a library: `librarian search --library "middleware"` - Search modes: `--mode word|vector|hybrid` (word = exact words, vector = meaning, hybrid = both) - Pin to a version: `librarian search --library --version