Worked on the jax-ml/jax repository to enhance type safety and developer experience by aligning type hints with the runtime API. Focused on Python development and type checking, the work included delivering a type stub for the Array.platform() method and updating basearray.pyi to resolve attribute errors and match the devices() API. Removed unnecessary pyrefly ignore suppressions, which reduced maintenance overhead and improved code clarity. These changes strengthened typing parity between jax/_src and jaxlib, enabling safer static analysis and accelerating onboarding. The approach emphasized software maintenance and consistency, broadening API capabilities while supporting more reliable and maintainable code paths.