React Native Navigation Codebase

Architecture Overview

RNN has three layers that mirror each other:

JS/TS (src/)  →  TurboModule bridge  →  iOS native (ios/)
                                     →  Android native (android/)

A navigation command (e.g. push) flows:

1. Navigation.push() → Commands.ts → processing pipeline → NativeCommandsSender.ts
2. TurboModule: RNNTurboModule (iOS) / NavigationTurboModule.kt (Android)
3. iOS: RNNCommandsHandler → RNNViewControllerFactory → UIKit controllers
4. Android: Navigator → LayoutFactory → View-based controllers (no Fragments)

Read ARCHITECTURE.md for the full overview.