Worked on the stan-dev/docs repository to deliver a documentation and user guide navigation update, focusing on improving both usability and contributor onboarding. The work involved adding a new chapter to the user guide, introducing a bibliography citation for future referencing, and enhancing the README with clear instructions for adding new chapters to manuals. Using Markdown, YAML, and BibTeX, the developer addressed website navigation and citation handling, ensuring documentation consistency. The technical writing and configuration management skills applied in this update streamlined cross-referencing and made it easier for future contributors to extend the documentation, supporting maintainability and clarity across the project.