Project Structure

The engineer app follows a feature-based structure organized by functionality rather than technical layer.

Root Directory

├── .circleci/              # CircleCI configuration
├── .expo/                  # Expo configuration and cache
├── .github/                # GitHub workflows and templates
├── .rnstorybook/           # React Native Storybook configuration and stories
├── assets/                 # Static assets (images, fonts, icons)
├── bin/                    # Build and utility scripts
├── build-assets/           # Assets for app builds
├── config/                 # App configuration files
├── config-plugins/         # Custom Expo config plugins
├── documentation/          # VitePress documentation site
├── e2eAppium/              # End-to-end tests (Appium)
├── eas/                    # EAS Build configuration
├── src/                    # Application source code
├── .eslintrc.js            # ESLint configuration
├── .prettierrc             # Prettier configuration
├── app.config.ts           # Expo configuration (dynamic)
├── babel.config.js         # Babel configuration
├── eas.json                # EAS Build profiles
├── env-config.json         # Environment variables
├── index.ts                # App entry point
├── jest.config.js          # Jest testing configuration
├── metro.config.js         # Metro bundler configuration
├── package.json            # Dependencies and scripts
└── tsconfig.json           # TypeScript configuration

Source Directory (src/)

src/
├── app/                   # Expo Router file-based routes
├── components/            # Feature-specific UI components
├── constants/             # Application constants
├── contexts/              # React contexts
├── design-system/         # Reusable UI components with Unistyles
├── fixtures/              # Test fixtures and mock data
├── refs/                  # React refs utilities
├── services/              # Redux store, API slices, domain services
├── types/                 # TypeScript type definitions
├── utils/                 # Domain-specific utilities
└── env.ts                 # Environment configuration

For import patterns, file naming conventions, code organization principles, and best practices, see Coding Standards.