Arnaud contributed to the WordPress/hosting-handbook repository by enhancing the clarity and consistency of its server environment and upgrade documentation. Focusing on server-environment.md and upgrading.md, Arnaud applied strong documentation skills using Markdown to correct typographical errors and improve overall readability. The work aimed to provide clearer, more professional guidance for users setting up or upgrading server environments, addressing ambiguities and ensuring editorial consistency across the handbook. While no bugs were fixed during this period, the depth of the contribution lay in meticulous text refinement and adherence to documentation standards, resulting in more accessible and accurate technical resources for the WordPress community.