Skip to content
appsgit

Lean Formalize

Lean Formalize is an agent skill (a SKILL.md file) from wanshuiyin/Auto-claude-code-research-in-sleep. Develop and verify a mathematical proof in Lean, continue an incomplete Lean project, or audit whether it proves the original statement. It works with Claude Code and Codex and has 17,064 GitHub stars across a repository of 5 listed skills.

github.com/wanshuiyin/Auto-claude-code-research-in-sleep/skills/lean-formalize (opens in a new tab)

  • Multi-skill repo
  • Plugin marketplace
  • Security
  • Actively maintained
View on GitHub (opens in a new tab)

Add this skill

Claude

This repository is a Claude Code plugin marketplace. In Claude Code:

/plugin marketplace add wanshuiyin/Auto-claude-code-research-in-sleep
/plugin install aris@aris

In the Claude apps, zip the lean-formalize folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/wanshuiyin/Auto-claude-code-research-in-sleep.git
cp -r Auto-claude-code-research-in-sleep/skills/lean-formalize .agents/skills/lean-formalize   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/wanshuiyin/Auto-claude-code-research-in-sleep.git
cp -r Auto-claude-code-research-in-sleep/skills/lean-formalize .cursor/skills/lean-formalize   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

Develop and verify a mathematical proof in Lean, continue an incomplete Lean project, or audit whether it proves the original statement. Connect actual inputs to intermediate lemmas, assemble the target theorem, check its transitive axioms, and provide a reproducible handoff. Use when Lean is requested or a specific proof obligation benefits from formal verification; use proof-writer for ordinary mathematical drafting.

When it triggers

  • Use when Lean is requested or a specific proof obligation benefits from formal verification; use proof-writer for ordinary mathematical drafting.

More skills in wanshuiyin/Auto-claude-code-research-in-sleep

5 skills are listed from this repository.

Similar skills

More security skills

All Security

FAQ

Lean Formalize FAQ

Still curious? Email info@appsgit.com.

What is the Lean Formalize skill?

Lean Formalize is an agent skill (a SKILL.md file) from wanshuiyin/Auto-claude-code-research-in-sleep. Develop and verify a mathematical proof in Lean, continue an incomplete Lean project, or audit whether it proves the original statement. It works with Claude Code and Codex and has 17,064 GitHub stars across a repository of 5 listed skills. Its SKILL.md lives at github.com/wanshuiyin/Auto-claude-code-research-in-sleep/skills/lean-formalize.

How do I install the Lean Formalize skill?

In Claude Code, run /plugin marketplace add wanshuiyin/Auto-claude-code-research-in-sleep and then /plugin install aris@aris. For Codex or Cursor, copy the lean-formalize folder into .agents/skills/ or .cursor/skills/.

Is the Lean Formalize skill free?

Yes. The repository is open source under the MIT license.

Is Lean Formalize maintained?

The repository's most recent commit was on Oct 6, 2026. Its latest release is v0.4.28. appsgit only lists skills from repositories with a commit in the last six months.