During March 2025, Crockwell focused on backend stability within the facebook/fbthrift repository, addressing a critical issue in the Controller Monitoring logic. By implementing a defensive check to prevent division-by-zero errors in QPS calculations, Crockwell improved the reliability and accuracy of production metrics under high load. This C++ fix reduced the risk of runtime errors and misleading dashboard data, directly supporting operational uptime and observability. The work demonstrated careful attention to monitoring guardrails and traceability, as the change was clearly associated with a specific commit. Crockwell’s contribution reflected depth in backend development and robust error handling using C++.