In August 2025, Bhpcv252 enhanced both the matplotlib and astropy repositories by delivering two targeted features focused on type safety and visualization control. In matplotlib, Bhpcv252 improved colormap type-checking by adding hardcoded definitions to the cm.pyi file and implemented runtime validation tests, strengthening code analysis and type hinting. For astropy, Bhpcv252 introduced explicit axis unit control for Matplotlib plots, allowing users to override default unit inference with ax.yaxis.set_units() and ax.xaxis.set_units(), supported by comprehensive tests and documentation. The work demonstrated depth in Python, data visualization, and testing, resulting in more reliable APIs and improved developer experience.