Worked on the microsoft/azure-pipelines-agent and microsoft/azure-pipelines-tasks repositories, focusing on enhancing CI infrastructure and task reliability for Azure Pipelines. Upgraded macOS CI runners to macOS-14 for both x64 and ARM64, refactoring resource monitoring and process management to ensure accurate task completion reporting across platforms. Delivered a major Gradle task update, removing redundant code and improving configuration files to streamline maintenance. Leveraged TypeScript, YAML, and Node.js to implement robust error handling and tracing, resulting in improved build accuracy and faster feedback cycles. These efforts reduced technical debt, clarified repository ownership, and strengthened cross-platform CI/CD reliability for development teams.