How the instrument is written
Accessibility is the floor. Writing is US English, sentence case, numbers first-class. Microcopy is the words on controls. Internationalisation treats every string as a key.
Terminology lives in Brand. These guidelines do not invent a second glossary.
Accessibility
WCAG 2.2 AA floor
Ten construction checks. Validate with axe, Lighthouse, and operators.
WritingMechanics of the source
Sentence case, Oxford comma, en dash ranges, you/we.
MicrocopyWords on the instrument
Buttons, empty, error, loading, toast — plus live examples.
InternationalisationKeys, not concatenations
ICU, +40% expansion, RTL rails, untranslated ETHER.
Glossary: Brand terminology.