In August 2025, Harrison Chen enhanced the chariot-giving/chariot-openapi repository by implementing robust access control for the Donor Advised Funds API. He focused on securing sensitive endpoints by introducing authentication and authorization requirements, ensuring that only authenticated users could access DAF list and get operations. Using YAML and leveraging his expertise in API design and the OpenAPI Specification, Harrison updated the API documentation and security definitions to reflect these new controls. This work improved the API’s security posture, reduced the risk of unauthorized data exposure, and positioned the system for future compliance audits, demonstrating a focused approach to governance requirements.