Aliwo contributed to the python/mypy repository by enhancing typing compatibility for Python 3.13 and newer versions. Focusing on static analysis and type hinting, Aliwo implemented version-aware logic to support nested usage of Final and ClassVar annotations, reflecting updates in Python’s typing module. This work involved adding version checks and correcting mypy’s handling of these annotations, ensuring accurate analysis and reducing errors during migration to Python 3.13+. Using Python as the primary language, Aliwo’s targeted bug fix improved the reliability of type checking for modern codebases. The contribution demonstrated a focused, in-depth approach to evolving language compatibility.