Worked on the woocommerce/woocommerce repository, focusing on backend PHP development to enhance the reliability of the email subsystem. Addressed a specific issue in the WC_Email class by correcting the @var type declaration from 'String' to 'string', ensuring alignment with PHP typing standards and WooCommerce coding conventions. This targeted bug fix improved static analysis accuracy and maintainability, reducing the risk of runtime issues in email handling. The approach demonstrated careful attention to code quality and compatibility with modern PHP versions, with clear commit messaging and issue association supporting traceability and collaboration. Utilized PHP and backend development skills throughout the process.