Tobias Schellen focused on enhancing code quality in the RWTH-EBC/AixLib repository by improving the clarity of Modelica model documentation. He targeted HeatRecoverySystem.mo and ExampleAHU.mo, correcting ambiguous code comments to reduce potential misinterpretation for future maintainers. Through careful code refactoring and documentation improvement, Tobias addressed specific typographical errors, ensuring that technical terms were accurately represented. His work, delivered in a single, traceable Git commit, aimed to streamline onboarding and ongoing maintenance for the AixLib models. By applying Modelica and leveraging Git-based collaboration, Tobias contributed to a more maintainable codebase, though the scope was limited to documentation enhancements.