During March 2026, Dmmargarint developed a controlled exposure mechanism for physiology content in the elifesciences/journal repository by implementing a feature flag within the SubjectsController. This approach allowed physiology subject access to be gated via query parameters, enabling a safe and reversible rollout. After validating the process, Dmmargarint removed the feature flag to make physiology content publicly accessible, thereby simplifying user access and reducing ongoing maintenance. The work demonstrated careful end-to-end traceability by linking changes to issue tracking and ensuring rollback readiness. The project utilized PHP for back end development and API integration, reflecting focused, single-feature engineering depth.