During December 2024, this developer enhanced the runtimeverification/k repository by implementing a new LLVM Hidden Visibility option for the pyk command-line tool. The work focused on backend and CLI development using Python, introducing a --llvm-hidden-visibility flag that hides LLVM backend symbols by default. This feature required updates to argument parsing and backend generation, resulting in improved security by reducing symbol leakage and offering potential benefits in binary size and linking behavior. The contribution addressed a specific need for controlled symbol visibility in compiler development, demonstrating a focused approach to backend tooling and command-line interface enhancements within the project’s scope.