Andreas Kofler contributed to the PTB-MR/mrpro repository by focusing on stability and maintainability through targeted dependency management and code refactoring. He updated the pydicom dependency to version 3.0.1 using Python and TOML, ensuring ongoing compatibility and security for the project. Andreas also refactored core numerical computing components, specifically improving the ProximableFunctional class to enforce non-negative sigma values and redesigning the LinearOperator’s operator norm calculation to eliminate in-place additions. These changes enhanced code clarity and reduced potential side effects, laying a foundation for safer, more maintainable APIs without addressing major bugs during this development period.