Jenny Chen contributed to the CQCL/hugr repository by developing and refining compiler infrastructure using Rust and LLVM. She introduced a public getter in EmitFuncContext to provide safer access to the current FunctionValue, improving emitter usability and maintainability. Jenny also enhanced encapsulation by setting helper function linkage to Private, reducing symbol exposure. In a subsequent optimization, she aligned LLVM function linkage with hugr node visibility, enabling dead code elimination for previously retained helper functions. Her work included targeted unit testing and careful IR-level tuning, resulting in cleaner binaries and more efficient runtime behavior, demonstrating depth in compiler development and testing.