Michael Mueller focused on improving the stability and maintainability of the Score Metamodel Tooling within the qorix-group/score repository. He addressed persistent linting and type-checking issues by resolving Ruff and Pyright errors, as well as runtime-only attribute warnings in the score_source_code_linker. Using Python and leveraging Sphinx for documentation, Michael enhanced code quality and aligned the tooling with static analysis standards. These targeted fixes reduced false positives in continuous integration and streamlined developer workflows. Although the work centered on bug resolution rather than new features, it contributed to a more reliable and efficient tooling stack for ongoing development and maintenance.