Arisacoba expanded the iconography in the primer/octicons repository by introducing CheckboxFillIcon support, adding two new SVG assets to the icon suite. The work involved careful SVG optimization and integration of the new icons into the component library, ensuring consistency with existing Octicons standards. Arisacoba updated the public API snapshot to reflect these additions, maintaining stability for downstream consumers and documenting changes through disciplined version control. The project leveraged skills in SVG asset management, iconography, and component library updates. This focused contribution enhanced the checkbox UI implementation options, demonstrating depth in asset integration and attention to maintaining a stable, predictable API.