# Passkey

> Passkey passwordless authentication reference. Synced FIDO2 credentials via iCloud/Google. Covers frontend registration and login code, conditional UI autofill, feature detection, platform support matrix, UX best practices, database schema, and password-to-passkey migration strategy.

- Skill: `bytesagain/passkey` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add bytesagain/passkey`
- Raw SKILL.md: https://api.skillmd.com/api/skills/bytesagain/passkey/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: bytesagain (https://skillmd.com/u/bytesagain)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/bytesagain/passkey

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# Passkey Reference

The future of authentication.

## Commands

| Command | Description |
|---------|-------------|
| `intro` | Overview, providers |
| `implement` | Frontend code, conditional UI |
| `platforms` | Support, UX, migration |