@nozomiishii/lefthook-config/hooks/pre-commit/lint/file-extension/yaml.yaml

Nozomi's Recommended lefthook config

pre-commit:
  commands:
    lint-file-extension-yaml:
      files: git diff --name-only --staged
      glob: '*.yml'
      run: echo "Error! ".yml" extension found, please use ".yaml" instead." && exit 1