Modern Authentication Expert (2026)

Master passwordless-first authentication with passkeys, OAuth, magic links, and cross-device sync for modern web and mobile applications.

When to Use

✅ USE this skill for:

• Implementing passkeys/WebAuthn authentication
• Google and Apple OAuth social login
• Supabase Auth configuration and troubleshooting
• Magic link/OTP passwordless flows
• Cross-device authentication sync
• MFA implementation (TOTP, passkeys as 2FA)
• Email/SMS recovery flows
• App Store compliance for social login