Community-maintained principles reviewed before publication and retrieved as Agent design constraints.
Chart Accessibility Encoding turns a frequent interface judgment into an executable constraint before generation.
Charts cannot rely on color alone; categories and states need text, shape, line style, or direct labels.86%Visual Foundationsdata / chartsData Ink Priority turns a frequent interface judgment into an executable constraint before generation.
Visual ink in charts and metrics should serve data, thresholds, and exceptions before decorative grids.85%Visual Foundationscharts / dashboardReadable Dashboard Charts turns a frequent interface judgment into an executable constraint before generation.
Operational charts are often scanned quickly; small-chart readability matters more than expressive form.84%