librarian

95 / 100 · Low risk

Fine to try.

By roerohan/skills (GitHub) · coding · 29 stars · scanned at commit 171fbdd

Multi-repository codebase exploration. Research library internals, find code patterns, understand architecture, compare implementations across GitHub/npm/PyPI/crates. Use when needing deep understanding of how libraries work, finding implementations across open source, or exploring remote repository structure.

Works with any agent that supports SKILL.md skills.

What this skill can do

Connects to the internet

The author does not mention this.

Found in 16 places.

librarian/SKILL.md, line 661. opensrc.fetch(target)
librarian/SKILL.md, line 761. opensrc.fetch(["X", "Y"])
librarian/SKILL.md, line 87const [{ source }] = await opensrc.fetch("vercel/ai");

Show 13 more

librarian/references/opensrc-api.md, line 53opensrc.fetch(specs: string | string[], options?: { modify?: boolean }): Promise<FetchedSource[]>
librarian/references/opensrc-api.md, line 226const [{ source }] = await opensrc.fetch("vercel/ai");
librarian/references/opensrc-examples.md, line 9const [{ source }] = await opensrc.fetch("vercel/ai");
librarian/references/opensrc-examples.md, line 20const [{ source }] = await opensrc.fetch("vercel/ai");
librarian/references/opensrc-examples.md, line 37const [{ source }] = await opensrc.fetch("zod");
librarian/references/opensrc-examples.md, line 50const results = await opensrc.fetch(["zod", "valibot", "yup"]);
librarian/references/opensrc-examples.md, line 123const [{ source }] = await opensrc.fetch("lodash");
librarian/references/opensrc-examples.md, line 142const [{ source }] = await opensrc.fetch("vercel/ai");
librarian/references/opensrc-examples.md, line 162const [{ source }] = await opensrc.fetch("zod");
librarian/references/opensrc-examples.md, line 186const results = await opensrc.fetch(["zod", "valibot"]);
librarian/references/tool-routing.md, line 30C --> C1["opensrc.fetch([X, Y])"]
librarian/references/tool-routing.md, line 751. opensrc.fetch(target)
librarian/references/tool-routing.md, line 851. opensrc.fetch([X, Y])

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'librarian' ] || [ -L ~/.agents/skills/'librarian' ]; then echo 'A skill folder named librarian already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/roerohan/skills' "$d" && git -C "$d" checkout --quiet '171fbdd3085ba76dacd148aa292d0559e8d913eb' -- 'librarian' && mkdir -p ~/.agents/skills && cp -R "$d"/'librarian' ~/.agents/skills/'librarian' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'librarian' ~/.claude/skills/'librarian' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-09	`171fbdd`	95