Worked on enhancing detector simulation in the eic/epic repository by developing a fully configurable B0 ECAL geometry using C++. Focused on geometry definition and detector positioning, the work introduced a B0 exit window to enable more realistic simulation scenarios. Geometry definitions were updated to improve both resolution and acceptance, directly supporting higher simulation fidelity. These improvements facilitate rapid scenario testing and provide a stronger foundation for modeling, validation workflows, and downstream analytics. The technical approach emphasized modularity and configurability, leveraging C++ and domain expertise in detector simulation to support better design decisions and more accurate studies in related research areas.