Worked on the google/copybara repository to enhance reliability by addressing environment variable conflicts during Quilt integration. Using Java and leveraging skills in build systems and environment variable management, implemented a solution that unsets all user-defined variables prefixed with QUILT_ before invoking the Quilt binary. This approach prevents environment-induced failures and ensures more predictable automation across deployments. A regression test was added to verify the unsetting behavior, guarding against future issues. The change stabilized the Copybara-Quilt integration, reduced CI and production failures, and improved developer productivity by enabling smoother migrations and more reliable cross-repository automation pipelines in patch management workflows.