Early on, proposed the prototype for dragging/dropping images into comments. Built generative Identicons, the first GitHub Guides site (for which I made this geo_pattern library). Designed the Arctocat shirt.
Redesigned the pull request merge box UI, the user profile page, and our blank slates. Added CI status to the favicon in a hack week project with Joel Califa. Worked on repository topics, signed commits, and repository sparklines. Designed the default GitHub Pages theme.
Later, I worked on Actions from the initial prototype through v2. The first version had an interactive visual graph. Contributed to Primer as we moved more towards components.