Mathlib Review

Q: What is a Claude Code skill and how does the Mathlib Review skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Mathlib Review is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Product · Sub-category: product-misc · Last updated: 2026-05-30

type:review

REDIRECT — Mathlib PR review standards (attributes API, simp squeezing, normal forms, transparency, file size, naming/style URLs) have been demoted to `references/upstream/mathlib4-review.md`. Generic Lean proof review lives in `lean-proof-review`. This stub preserves the slug for Ctrl-F discoverability and incoming cross-references (per the zero-deletions Chesterton protocol).

From the source SKILL.md

This skill no longer hosts content. The Mathlib-specific review checklist has been moved to a reference because it has no workflow, no triggers, and no callers other than the gateway registry row. Generic Lean proof review (workflow, behavioural rules, recovery) remains in [lean-proof-review](../../lean-proof-review/SKILL.md).

What this skill does

Mathlib Review is a community-contributed Claude Code skill in the product-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/mathlib-review/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Mathlib Review Claude Code skill is built for product managers, product designers, and cross-functional teams planning, shipping, and measuring product features. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 117,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

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

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

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

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

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.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Mathlib Review Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/mathlib-review/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Mathlib Review skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Mathlib Review skill?

Use Mathlib Review when your Claude Code task falls under the Product category — specifically in the product misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Mathlib Review" or describe the task and let Claude pick). Browse related skills at /category/product/.

What is a Claude Code skill and how does the Mathlib Review skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Mathlib Review is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/r-irbe/proof-skills/blob/HEAD/skills/_overrides/mathlib-review/SKILL.md
License: Apache-2.0
Author: r-irbe
Website: https://github.com/r-irbe/proof-skills

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

r-irbe. (2026). Mathlib Review [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/mathlib-review/

BibTeX

@misc{mathlib-review-2026,
  author    = {r-irbe},
  title     = {Mathlib Review [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/mathlib-review/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/mathlib-review.svg)](https://claudskills.com/skills/mathlib-review/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

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