During September 2025, Mrphipv worked on the WordPress/secure-custom-fields repository, focusing on improving REST API data integrity for custom fields. He addressed a bug where the formatted_value in API responses could be derived from a modified REST value, potentially causing inconsistencies across plugins. By ensuring formatted_value is always based on the original field data, he improved data consistency and plugin interoperability. Mrphipv also clarified the population of the _source property in REST responses, enhancing developer understanding and integration reliability. His work, primarily using PHP and leveraging REST API and WordPress development skills, reduced the risk of downstream integration issues.