During October 2025, Jan Mutke focused on enhancing the FZJ-IEK3-VSA/FINE repository by overhauling its core library documentation. He systematically introduced comprehensive docstrings to key methods and functions, aiming to improve API readability and ease developer onboarding. To enforce consistent documentation standards, Jan integrated a Ruff-based linting configuration that applies docstring checks while excluding test files, balancing code quality with practical development needs. His work, implemented in Python and emphasizing code quality and documentation, addressed maintainability challenges by making the codebase more accessible and understandable for contributors, reflecting a targeted and in-depth approach to technical documentation within the project.