Worked on the moltbot/moltbot repository to enhance billing data integrity by addressing issues with unparseable timestamps in session-cost-usage calculations. Using TypeScript and backend development skills, implemented a safeguard that detects NaN values resulting from invalid timestamps and defaults them to zero, aligning with existing behavior for missing timestamp keys. This approach prevented the propagation of NaN values into revenue calculations, thereby improving billing correctness. The solution included comprehensive tests and clear documentation to ensure maintainability and transparency. The work focused on bug resolution rather than feature development, demonstrating attention to detail and a methodical approach to backend reliability.