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Leanrea

Leanrea is an agent skill (a SKILL.md file) from aicodeking/leanrea. Reverse engineer shipped software with plain local CLI tools, no MCP needed. It works with Claude Code, Codex, Cursor, Gemini CLI and OpenCode and has 2,641 GitHub stars. Install it by copying the skill folder into your agent's skills directory.

github.com/aicodeking/leanrea/leanrea (opens in a new tab)

Data as of from the GitHub API and skills.sh; description from the skill's SKILL.md. Report an error

View on GitHub (opens in a new tab)View on skills.sh (opens in a new tab)

Add this skill

Claude

Claude Code loads skills from ~/.claude/skills/ (all projects) or .claude/skills/ (one project):

git clone --depth 1 https://github.com/aicodeking/leanrea.git
cp -r leanrea/leanrea ~/.claude/skills/leanrea   # personal, or .claude/skills in a project

In the Claude apps, zip the leanrea 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/aicodeking/leanrea.git
cp -r leanrea/leanrea .agents/skills/leanrea   # 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/aicodeking/leanrea.git
cp -r leanrea/leanrea .cursor/skills/leanrea   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (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

Reverse engineer shipped software with plain local CLI tools, no MCP needed. Covers Electron/JS bundles, native Mach-O/ELF/PE, Go/Rust/.NET/Flutter/WASM binaries, APKs, SQLite, pcaps, firmware and websites. Use to explain how a feature works, extract versions/deps, compare builds, or rebuild a feature. You already know these tools. This file only lists the fastest command for each target, and the traps.

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FAQ

Leanrea FAQ

Still curious? Email info@appsgit.com.

How do I install the Leanrea skill?

Copy the leanrea folder (the one containing SKILL.md) into ~/.claude/skills/ for Claude Code, .agents/skills/ for Codex or .cursor/skills/ for Cursor. The agent picks it up automatically when a task matches its description.

Is the Leanrea skill free?

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

Is Leanrea maintained?

The repository's most recent commit was on Oct 17, 2026. appsgit only lists skills from repositories with a commit in the last six months.