During June 2025, this developer focused on non-functional improvements across the opensafely-core/ehrql and opensafely-core/airlock repositories, emphasizing build automation, code cleanup, and documentation. They removed obsolete test commands from the ehrql repository’s build configuration, aligning the CI pipeline with the current project structure and reducing maintenance overhead. In the airlock repository, they corrected documentation typos to enhance clarity and professionalism for end users. Working primarily with Shell scripts and Markdown, their contributions improved reliability and user communication, resulting in more robust CI processes, clearer onboarding materials, and a reduction in potential support queries for both projects.