1. Create a global hooks directory

   mkdir -p ~/.git-hooks
   

2. Save the hook script

   # Create the commit-msg hook file
   cat > ~/.git-hooks/commit-msg << 'EOF'
   #!/bin/bash
   # Conventional commit pattern
   conventional_pattern='^(feat|fix|docs|style|refactor|perf|test|build|ci|chore|revert)(\(.+\))?: .{1,50}'
   # Read commit message
   commit_message=$(cat "$1")
   # Validate format
   if ! echo "$commit_message" | grep -qE "$conventional_pattern"; then
    echo ""
    echo "❌ Commit message does not follow conventional commit format!"
    echo ""
    echo "Required format: <type>[optional scope]: <description>"
    echo ""
    echo "Valid types: feat, fix, docs, style, refactor, perf, test, build, ci, chore, revert"
    echo ""
    echo "Examples:"
    echo "  feat: add user authentication"
    echo "  fix(auth): resolve login issue"  
    echo "  docs: update README"
    echo ""
    echo "Your message: '$commit_message'"
    echo ""
    exit 1
   fi
   echo "✅ Commit message follows conventional format"
   exit 0
   EOF
   

3. Make it executable

   chmod +x ~/.git-hooks/commit-msg
   

4. Configure git to use this directory globally

   git config --global core.hooksPath ~/.git-hooks
   

   Now all your git repositories will use this hook. Test it with a new commit:

# This should fail
git commit -m "bad commit message"

# This should succeed
git commit -m "feat: add new feature"

Note: Claude was used to generate the conventional-commit script.