Mark Piper focused on improving user navigation within the landlab/landlab repository by addressing a critical issue that prevented users from reaching the correct Hub exploration environment. He updated nbgitpuller links and revised the README, ensuring that users are now directed to the appropriate exploration interface for Landlab notebooks. This work, primarily involving Markdown and documentation skills, enhanced onboarding accuracy and reduced confusion for new users. Mark also documented the changes with a news fragment, providing clear communication for the project community. While no new features were added, his efforts contributed to project stability and a smoother user experience during onboarding.