Community-maintained principles reviewed before publication and retrieved as Agent design constraints.
Interface copy should help users act, with brand voice applied carefully to buttons, states, and explanations.
Brand expression must not sacrifice clarity, especially for errors, payments, moderation, and destructive actions.82%Typography Color Accessibilitytypography / font-pairingFont pairing should start from product function: brand voice, long reading, numeric comparison, and controls have different needs.
Typeface differences need a clear purpose; decorative mixing can increase reading cost.82%