Worked on the CovertLab/vEcoli repository to enhance the reliability of metabolism-redux-classic simulations by addressing a critical bug affecting data persistence. Focused on Python-based bug fixing and data handling, the developer corrected an issue with data type initialization for the charged tRNA counts array, which previously prevented simulation results from being exported in parquet format. This fix ensured proper unit handling and enabled reproducible, long-running experiments by safeguarding simulation outputs for downstream analytics. The work demonstrated a methodical approach to debugging and simulation workflows, emphasizing stability and data integrity without introducing new features during the development period.