Worked on the openjdk/leyden repository to enhance cross-platform build and test stability, focusing on resolving environment-specific issues affecting Windows and WSL. Addressed a persistent bug by updating fixpath.sh to correctly handle '+' characters in Windows paths, which eliminated related build failures. Improved the reliability of continuous integration by adjusting test invocation methods to prevent failures unique to the Windows Subsystem for Linux. Utilized Java, shell scripting, and targeted testing to ensure consistent workflows across different environments. The work resulted in reduced CI flakiness and clearer cross-platform processes, reflecting a methodical approach to stabilizing complex build and test pipelines.