Headline: A passkey is a WebAuthn public-key credential held by the device's authenticator and permanently bound to one Relying Party ID (RP ID), and it replaces the password and the second factor in a single prompt. Three details caused nearly every bug I hit: the RP ID must be the origin's reg...
Source: [Dev.to](https://dev.to/ahmed_mahmoud360/passkeys-in-production-field-notes-on-webauthn-conditional-ui-and-the-rp-id-that-broke-my-login-5aop)