Jonathan Drolet enhanced the antmicro/verilator repository by implementing support for unpacked structures in local parameters, addressing a nuanced aspect of Verilog simulation. He extended the abstract syntax tree visitor methods in C++ to parse these structures and developed targeted tests to validate the new functionality. This work improved simulation accuracy for designs using unpacked structs in localparams, reducing the need for user workarounds. Jonathan’s approach included strengthening regression tests and updating documentation to guide future development. While the enhancement was partial, it laid a solid foundation for full support and demonstrated depth in simulation, C++ development, and Verilog integration.