Material UI styling

Agent skill for picking the correct styling layer in Material UI (narrowest scope first). SKILL.md is the entry and index; AGENTS.md is the full guide.

When to apply

• Choosing among sx, styled(), theme components, or global CSS for a change
• Overriding component slots or state safely
• Comparing sx vs styled() semantics (spacing, theme shortcuts)

Sections in AGENTS.md (by priority)