Juanes worked on the nextflow-io/training repository, focusing on improving the clarity and usability of project documentation. He addressed a documentation bug by correcting header numbering in the Hello Config markdown file, ensuring that the structure accurately reflected the intended flow of configuration examples. Using Markdown and applying technical writing best practices, Juanes updated and validated the documentation to align subsections properly, which enhanced navigability for users and streamlined onboarding. This targeted fix, linked to a specific issue and commit, demonstrated attention to detail and a methodical approach to documentation quality, though the scope was limited to a single, well-executed improvement.