Contribution Graph

A table with role="grid", named by its caption ("1,234 contributions in 2025", "… in the last 6 months", or `label`). Weekdays are row headers and months column headers; every day is a gridcell whose screen-reader text states the count and the full date, so colour never carries the value. One day is tabbable (roving tabindex): arrows move by day and week (mirrored in RTL), Home/End to the ends of the weekday row, Ctrl+Home/End to the ends of the range, PageUp/PageDown by four weeks. The tooltip follows keyboard focus as well as hover and Escape dismisses it. ContributionGraphPanel's chevron is a disclosure button (aria-expanded, aria-controls) named by the footer label, which also names the ranked list; each row reads its name and count phrase, and its bar and avatars are aria-hidden. While the panel is open the grid and legend under it are inert; while closed the panel is inert and hidden. Escape closes it and returns focus to the chevron. Its motion is transform and opacity only and collapses under reduced motion.