UI Typography Skill

Attribution

These rules are distilled from Matthew Butterick's Practical Typography (https://practicaltypography.com). Butterick is a typographer, writer, and type designer whose work bridges professional typography and everyday digital writing. Thank you, Matthew, for making this knowledge accessible and encyclopedic. If you find this skill valuable, consider supporting his work directly.

Mode of Operation

These are permanent rules — not trends, not opinions. They come from centuries of typographic practice, validated by how the human eye reads. They do not go out of style.

ENFORCEMENT (default): When generating ANY UI with visible text, apply every rule automatically. Use correct HTML entities, proper CSS. Do not ask permission. Do not explain. Just produce correct typography.

AUDIT: When reviewing existing code or design, identify violations and provide before/after fixes.