Worked on enhancing the Tkinter PhotoImage API within the python/typeshed repository by updating the method signatures for the subsample and zoom functions. Focused on improving type hinting and compatibility with a range of input types, the work addressed typing and signature issues that previously led to static analysis false positives and runtime mismatches. Leveraged Python development skills and expertise in type hinting to strengthen typing fidelity, resulting in safer downstream usage for UI applications and improved IDE support. The contribution centered on library maintenance, expanding typing coverage to help developers build more robust user interfaces with better static analysis guarantees.