Clerk authentication in Expo (React Native)

Key constraints (read first)

• Expo native apps do not support Clerk email links. Prefer email verification codes (email_code) or other strategies.
• Clerk prebuilt UI components are not supported on Expo native. Use custom flows (your own screens) plus the control components: <ClerkLoaded>, <ClerkLoading>, <SignedIn>, <SignedOut>, <Protect>.
• Default session tokens are in-memory; for native apps you almost always want a secure token cache (Expo SecureStore).

What this skill does