Loogle

Quality score: 70/100 · Category: General · Sub-category: general-misc

Search for Lean 4 and Mathlib theorems, lemmas, and definitions by type signature, name, or subexpression pattern. Use when the user asks to find a theorem, look up a Lean definition, search for lemmas, or needs help discovering Mathlib functions.

What this skill does

Loogle is a production-ready Claude Code skill (quality score 70/100) in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/loogle/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user asks to find a theorem, look up a Lean definition, search for lemmas, or needs help discovering Mathlib functions.

Who uses this skill

The Loogle skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/loogle
curl -L https://claudskills.com/skills/loogle/SKILL.md \
  -o ~/.claude/skills/loogle/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/loogle/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/loogle/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\loogle\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

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Part of ClaudSkills — the open registry for Claude Code skills. · What's New · Install guide · About · llms.txt

Part of Acreator Store — Adam Lankamer's AI tools: GifPerfect · AspectPerfect · SlomoPerfect · Ucaption · UTagger · AutoXPoster · TestYourSkills