During September 2025, Guillaume Antoin contributed to the kestra-io/kestra repository by delivering user-focused UI/UX enhancements and addressing reliability issues. He implemented a precise date-time format option in application settings using SCSS and Vue, enabling millisecond-level accuracy in data representation and improving date handling for operators. Guillaume refined the documentation layout by centering the main container and enforcing responsive max widths, enhancing readability across devices. He also improved log display usability by showing copy buttons only on hover, reducing interface clutter. Additionally, he resolved a text wrapping bug on the System Overview page, ensuring consistent button readability and layout stability.