Firebase Auth SDK
01 / EXECUTIVE_SUMMARY
A modular, reusable Authentication SDK for React Native (Expo) powered by Firebase. It supports both Headless Mode (logic only) and Default Mode (Pre-built UI), featuring Google Sign‑In, Email/Password auth, and persistent state management.
02 / TECHNICAL_DEEP_DIVE
A modular and reusable Authentication SDK designed specifically for React Native (Expo) applications, built on top of Firebase authentication services. The SDK was architected to support two flexible integration modes: Headless Mode, which exposes authentication logic and state management for full UI control, and Default Mode, which provides ready-to-use, customizable authentication screens for rapid integration. It includes support for Google Sign-In and Email/Password authentication, with persistent session handling to ensure seamless user experiences across app restarts. Emphasis was placed on clean architecture, reusability, and developer experience, allowing teams to easily integrate secure authentication while maintaining scalability and consistent state management across mobile applications.