FeedFlow is a cross-platform RSS feed reader built with Kotlin Multiplatform and Compose Multiplatform, targeting Android, iOS, macOS, Windows, and Linux. It provides a rich reading experience with customizable layouts, reader mode with article extraction, offline content prefetching, and OPML/CSV import/export. The application emphasizes reliability through extensive unit testing, Maestro-based E2E tests for both mobile platforms, and a sophisticated cloud synchronization system supporting Dropbox, Google Drive, iCloud, FreshRSS, Miniflux, Feedbin, and BazQux. The architecture follows MVVM with clean separation of concerns (domain, data, presentation layers), uses Koin for dependency injection, SQLDelight for local persistence, and Ktor for networking. Platform-specific adaptations exist for background sync (Android WorkManager, iOS background tasks), widget support, and UI components (Compose Multiplatform for Android/Desktop, SwiftUI for iOS). The codebase demonstrates high craftsmanship with modular design, reusable abstractions (DataResult, content direction detection, image extraction, HTTP caching), and thorough test coverage including cloud sync conflict scenarios.