# Lefthook

> Lefthook

- Skill: `comeonoliver/lefthook` (Agent Skill)
- Install (CLI): `npx skillmds@latest add comeonoliver/lefthook`
- Raw SKILL.md: https://api.skillmd.com/api/skills/comeonoliver/lefthook/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: ComeOnOliver (https://skillmd.com/u/comeonoliver)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/comeonoliver/lefthook

---

# Lefthook

## Overview
Lefthook is a fast, polyglot Git hooks manager. Unlike Husky, it doesn't require Node.js — works with any language. Runs hooks in parallel, supports glob patterns, and configures via YAML.

## Instructions

### Step 1: Install
```bash
npm install -D lefthook
npx lefthook install
# Or: brew install lefthook
```

### Step 2: Configure
```yaml
# lefthook.yml — Git hooks configuration
pre-commit:
  parallel: true
  commands:
    lint:
      glob: "*.{ts,tsx,js,jsx}"
      run: npx eslint --fix {staged_files}
    format:
      glob: "*.{ts,tsx,js,jsx,css,md,json}"
      run: npx prettier --write {staged_files}
    typecheck:
      run: npx tsc --noEmit

pre-push:
  commands:
    test:
      run: npm test

commit-msg:
  commands:
    commitlint:
      run: npx commitlint --edit {1}
```

## Guidelines
- Lefthook runs commands in parallel by default — faster than sequential Husky hooks.
- {staged_files} placeholder only passes staged files — no need for lint-staged.
- Works in polyglot repos (Go, Python, Ruby) without Node.js dependency.