Paul Delpy enhanced the marker catalogue for the Lens application in the samply/lens repository, focusing on expanding and refining marker functionality to improve usability and accuracy in lens-based workflows. He implemented these updates using Python, applying his skills in data management and software development to ensure the new and updated markers integrated seamlessly with existing features. The work prioritized clean, maintainable code and future extensibility, with no major bug fixes required during the period. By concentrating on feature delivery and code quality, Paul enabled more reliable workflows for users, laying a solid foundation for subsequent improvements to the application.