skills/produce/references/modes/charts.md

# Charts

Use when the user wants visual treatment variants for an existing chart.

Preserve the underlying data, labels, values, ordering, categories, sources, and meaning. Do not add, remove, duplicate, reorder, or relabel chart elements.

Use image generation only for visual treatment such as hierarchy, color, typography, background, framing, material, and presentation style. Also load `../contracts/exact-content.md`.