Worked on stabilizing the CI trust-domain logic for the mozilla/fx-desktop-qa-automation repository, focusing on a targeted bug fix to ensure Level-3 execution is applied only to the correct repository and specific task types. Addressed issues in the .taskcluster.yml configuration by refining repository URL checks and execution-context validation, which improved both reliability and security of the QA automation workflow. Utilized YAML for configuration and leveraged CI/CD best practices alongside Taskcluster to prevent misrouted or unauthorized tasks. The work enhanced the integrity of the automation pipeline, reducing the risk of incorrect Level-3 application during continuous integration processes.