git-hooks-automation

Git Hooks Automation

Automate code quality enforcement at the Git level. Set up hooks that lint, format, test, and validate before commits and pushes ever reach your CI pipeline — catching issues in seconds instead of minutes.

When to Use This Skill

• User asks to "set up git hooks" or "add pre-commit hooks"
• Configuring Husky, lint-staged, or the pre-commit framework
• Enforcing commit message conventions (Conventional Commits, commitlint)
• Automating linting, formatting, or type-checking before commits
• Setting up pre-push hooks for test runners
• Migrating from Husky v4 to v9+ or adopting hooks from scratch
• User mentions "pre-commit", "commit-msg", "pre-push", "lint-staged", or "githooks"

Git Hooks Fundamentals

Git hooks are scripts that run automatically at specific points in the Git workflow. They live in .git/hooks/ and are not version-controlled by default — which is why tools like Husky exist.

Hook Types & When They Fire

Native Git Hooks (No Framework)

# Create a pre-commit hook manually
cat > .git/hooks/pre-commit << 'EOF'
#!/bin/sh
set -e

# Run linter on staged files only
STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep -E '\.(js|ts|jsx|tsx)$' || true)

if [ -n "$STAGED_FILES" ]; then
  echo "🔍 Linting staged files..."
  echo "$STAGED_FILES" | xargs npx eslint --fix
  echo "$STAGED_FILES" | xargs git add  # Re-stage after fixes
fi
EOF
chmod +x .git/hooks/pre-commit