FIDO2 passwordless authentication standard reference. Covers WebAuthn browser API, CTAP2 protocol, registration and authentication flows, passkey conditional UI, py_webauthn and SimpleWebAuthn server implementations, and Chrome DevTools testing.
Scanned 9/7/2026
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---
name: fido2
version: 1.0.0
description: >
FIDO2 passwordless authentication standard reference. Covers
WebAuthn browser API, CTAP2 protocol, registration and
authentication flows, passkey conditional UI, py_webauthn and
SimpleWebAuthn server implementations, and Chrome DevTools testing.
author: BytesAgain
homepage: https://bytesagain.com
source: https://github.com/bytesagain/ai-skills
tags: [fido2, webauthn, passkey, authentication, security, passwordless]
---
# FIDO2 Reference
Passwordless authentication standard.
## Commands
| Command | Description |
|---------|-------------|
| `intro` | Overview, authenticators |
| `webauthn` | Browser API, flows |
| `server` | Python/Node.js, testing |
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