Worked on the MESAHub/mesa repository, focusing on simulation stability and configurability in scientific computing workflows. Addressed a time-step stability issue by ensuring isotopic abundance checks during kinetic energy calculations used the correct isotopes, specifically ne20 and si28, which improved simulation integrity and reduced the risk of regressions in related calculations. Later, enhanced the codebase by introducing a configurable simulation parameter, report_max_infall_inside_fe_core, to the namelist controls, enabling more flexible parameter sweeps and scenario testing. All changes were implemented in Fortran, leveraging numerical methods and scientific computing expertise, with careful attention to code quality, documentation, and version control discipline.