Mark Piper focused on improving user navigation and onboarding for the landlab/landlab repository by addressing a critical bug in the project’s documentation. He updated Markdown-based README files to ensure nbgitpuller links directed users to the correct Hub exploration environment, replacing outdated references to the lab environment. This change streamlined the onboarding process, reduced user confusion, and aligned documentation with the current workflow. Mark also added a news fragment to document the update, demonstrating attention to transparency and project history. His work emphasized documentation quality and user guidance, leveraging Markdown and collaborative documentation practices to enhance project stability and support.