Button with a full variant x tone x size matrix: 5 variants (solid, soft, outline, ghost, link), 6 tones (neutral, brand, success, warning, danger, info), 10 sizes (xs-xl plus square icon-xs through icon-xl for icon-only buttons), plus isLoading and asChild. Every tone is driven by ai2 semantic tokens.
pnpm dlx shadcn@latest add "https://ai2.design/r/button.json"