Worked on enhancing merge reliability in the microsoft/git repository by developing a regression test targeting a directory-rename crash within the merge-ort path. Using Shell scripting and Git, reproduced a scenario where conflicting directory and file renames across branches could trigger an assertion failure, then validated the corresponding fix by ensuring the test passed. This approach not only addressed a specific bug but also expanded test coverage for complex rename edge-cases, reducing the risk of similar failures in future merges. The work demonstrated a methodical focus on testing and stability, contributing to the long-term robustness of core merge functionality.