Astro Guideline: Components — Pass data via props. Description: Astro components receive props in frontmatter. Do: Astro.props for component data. Don't: Global state for simple data. Good Example: const { title } = Astro.props;. Bad Example: Import global store. Severity: Low. Docs: https://docs.astro.build/en/basics/astro-components/#component-props.