Hyeokhee worked on the QuantConnect/Documentation repository, focusing on improving the reliability of ETF constituents universe selection. During this period, Hyeokhee identified and fixed a bug in the LargestWeightSPYETFUniverseSelectionModel by ensuring the symbol argument was correctly passed to the superclass constructor, which prevented potential reference errors and stabilized the selection logic. The solution involved careful Python object-oriented debugging and precise version control practices. Hyeokhee also updated the related HTML documentation to clarify the ETF constituents behavior, demonstrating attention to both code quality and user guidance. The work addressed a targeted reliability issue rather than introducing new features.