A year of activity, one cell per day
The contribution graph renders a GitHub-style heatmap: weeks as columns, weekdays as rows, and a five-step green ramp (--color-chart-contribution-0 through -4) mapping each day's activity level to colour. It takes a plain array of days, so the data can come from anywhere — the GitHub API, an internal tool, or generated demo data.
Live GitHub data
This instance pulls real contribution data for the account that builds robr0 DS, cached server-side and refreshed every six hours.
Default
Grid only
Month labels, caption, and legend are all optional — the bare grid works as a compact activity strip.