Felicio Cassalho enhanced the STOFS-3D Atlantic model’s open boundary handling by updating its configuration within the schism-dev/schism repository. He introduced support for boundary IDs 0 and 1 in both the default setup and the v8_Hercules factory method, ensuring the model could accurately represent open boundaries in Atlantic simulations. Working primarily with Python, Felicio applied configuration management and model setup skills to deliver a targeted feature that improved simulation readiness. The work was focused and well-scoped, providing a clear, traceable update that addressed a specific modeling need without introducing unnecessary complexity or changes outside the intended configuration enhancements.