How to Build a Hybrid Passkey Strategy in Symfony 7.4: Navigating Beyond the Passwordless Fortress

In the first part of this series, we explored the “holy grail” of modern authentication: a 100% passwordless application. We stripped away passwords, hashes, and reset emails, replacing them with the cryptographic elegance of the WebAuthn API. Today, we’re going to create a single, intelligent login form that automatically detects if a user has a Passkey, triggers biometrics if available, but gracefully falls back to a traditional password when necessary.