Kunhe enhanced the facebookresearch/momentum repository by developing a targeted instrumentation feature to improve observability and debugging in the sequence solver. Using C++ and leveraging skills in debugging and logging, Kunhe implemented a mechanism that logs the original error value before any line search occurs, providing clearer diagnostic signals for developers. This approach did not require major bug fixes but instead focused on increasing traceability and reducing mean time to repair for solver-related issues. The work maintained solver performance while adding valuable diagnostic capabilities, supporting more reliable model optimization workflows and enabling faster, safer iterations for the engineering team.