Material UI theming and design tokens

Agent skill for theme creation, design tokens, light/dark, and CSS theme variables. SKILL.md is the entry; AGENTS.md is the full guide.

When to apply

• createTheme, ThemeProvider, useTheme, CssBaseline
• colorSchemes, useColorScheme, storage / SSR behavior
• cssVariables: true, theme.vars, applyStyles('dark', …)
• Custom theme keys and TypeScript module augmentation

Sections in AGENTS.md