Worked on stabilizing the denoland/chromium_build repository by addressing server control issues that affected CI reliability. Focused on reverting changes in the serve_repo.py script to restore stable start and stop semantics for the repository server, which had been disrupted by a previous update. This fix specifically targeted and resolved build failures on the fuchsia-arm64-cast-receiver-rel architecture, reducing flakiness and improving cross-architecture CI consistency. Leveraged skills in CI/CD, Python, and shell scripting to ensure the repository’s server controls aligned with established governance and testing practices, ultimately maintaining repository reliability and supporting robust, multi-environment continuous integration workflows.