During December 2025, Alejandro Delgado focused on enhancing the CSCfi/csc-user-guide repository by delivering comprehensive documentation for the transition to a new image builder, clarifying OS metadata requirements for ephemeral disks, and performing an extensive cleanup of outdated content. Working exclusively in Markdown, Alejandro applied strong technical writing and documentation skills to produce migration guides, update practices, and remove deprecated references, ensuring compatibility with OpenStack and improving long-term maintainability. The work addressed the need for accurate, up-to-date guidance for operators and users, resulting in clearer, more reliable documentation without introducing code changes or bug fixes during this period.