Leonardo contributed to the DefiLlama/icons repository by delivering an update to the UI asset library, specifically adding the rsz_pepu.jpg image for immediate integration into the user interface. He focused on graphic design and image asset management, ensuring the new asset improved branding consistency and streamlined asset provenance within version control. Leonardo utilized Git for clean commit practices and collaborated with UI/UX teams to align the asset with design requirements. While the scope of work was limited to a single feature over one month, the update enhanced UI polish and facilitated faster iteration on visual assets, demonstrating attention to repository hygiene.