During March 2026, Uson focused on security hardening for the google/copybara repository, addressing a Zip Slip vulnerability in the ExtractUtil component. Uson implemented logic in Java to ensure that files extracted from archives remain strictly within the intended target directory, preventing arbitrary file writes and reducing exposure to Zip Slip attack vectors. The solution included comprehensive unit tests to validate that any extraction attempt outside the target directory triggers an IOException, reinforcing safe extraction boundaries. This work demonstrated a strong grasp of security best practices and unit testing, resulting in a more robust and reliable extraction process for the project.