Typography

Type is most of your UI. The system does the hard parts — optical sizes, tracking tables, Dynamic Type — if you use its APIs. This skill covers when to trust the system, how to build hierarchy deliberately, and what custom fonts owe you back.

When This Skill Activates

• Choosing fonts or building a type hierarchy for a screen or app
• Text truncating, cramping, or breaking under larger Dynamic Type sizes
• Adopting a custom/brand font (and keeping accessibility)
• Display typesetting: hero numbers, stats, editorial headlines

Rule 1: text styles first

Predefined styles (Large Title → Caption 2) are weight + size + leading combos with Dynamic Type support built in — and different styles scale differently (body grows more than footnote), which manual font sizes can't replicate.