Worked on enhancing the facebookresearch/momentum repository by implementing a targeted instrumentation feature in C++ that improves observability and debugging for the sequence solver. The approach involved adding a debug log to capture the original error value before any line search is performed, allowing for faster diagnosis and root-cause analysis of solver-related issues. By focusing on logging and debugging skills, the work enabled clearer error signals and improved traceability without impacting performance. This addition reduced mean time to repair and supported more reliable model optimization workflows, contributing to overall stability and safer deployment while maintaining efficient development cycles.