During April 2025, Brian Mastbergen enhanced the ctrliq/kernel-src-tree repository by improving CI automation to support multi-branch synchronization. He updated the GitHub Actions workflow, specifically the sync.yml file, to include the stable_6.12.y and centos9 branches, ensuring these branches remained aligned with upstream kernel trees. This work leveraged his skills in CI/CD and GitHub Actions, with YAML as the primary configuration language. The feature addressed the need for consistent integration across multiple branches, streamlining the development process. While no bugs were fixed during this period, the focused update demonstrated depth in workflow automation and branch management within CI pipelines.