# Firebase Auth

> Sign-in flows, custom claims and token refresh: what belongs in a claim versus a database read, and the race between a claim change and the token that still carries the old one.

- Skill: `gulmezeren2-byte/firebase-auth` (Agent Skill)
- Install (CLI): `npx skillmds@latest add gulmezeren2-byte/firebase-auth`
- Raw SKILL.md: https://api.skillmd.com/api/skills/gulmezeren2-byte/firebase-auth/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: gulmezeren2-byte (https://skillmd.com/u/gulmezeren2-byte)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/gulmezeren2-byte/firebase-auth

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# firebase-auth

Sign-in flows, custom claims and token refresh: what belongs in a claim versus
a database read, and the race between a claim change and the token that still
carries the old one.