Chelsea Hu contributed to the openai/openai-cookbook repository by addressing a bug in the Portfolio Notebook within the multi-agent portfolio collaboration workflow. She focused on resolving broken static image references, ensuring that images render correctly and improving the clarity of data visualizations for portfolio analyses. Using Python and Jupyter Notebook, Chelsea modified the static asset path handling to restore reliable image rendering without impacting unrelated notebook features. Her work enhanced the end-user experience by reducing confusion from missing visuals and supporting reproducibility. The targeted fix demonstrated attention to detail in data visualization and asset management within collaborative machine learning environments.