Worked on enhancing the DeepSpeed repository by introducing precise type hints to its top-level public API functions, focusing on improving maintainability and developer experience. The approach involved adding detailed type annotations to functions such as initialize and init_inference in deepspeed/__init__.py, ensuring parameters and return types were clearly defined while preserving existing runtime behavior. This work, implemented in Python and leveraging type hinting best practices, aimed to facilitate safer API usage and streamline onboarding for new contributors. All changes were annotations-only, passed rigorous pre-commit checks, and aligned with internal discussions to keep the scope reviewable and support future refactoring efforts.