Anx Reader is a cross-platform e-book reader application built with Flutter and Dart. It supports a wide range of formats (EPUB, MOBI, PDF, TXT, FB2, CBZ) by leveraging a forked version of the foliate-js JavaScript library as its core rendering engine, served by an embedded Dart HTTP server and displayed in a platform-abstracted WebView widget. This architecture, while functional, creates a hard dependency on a complex external JavaScript project and a Dart HTTP server for what is fundamentally a local file reader. The application follows a monolithic architecture with a strong emphasis on clean separation of concerns. It uses Riverpod for reactive state management, a service layer for business logic (AI, TTS, Sync, Translation), and a widget layer for UI composition. The codebase is notable for its extensive use of design patterns like Registry (for AI tools and dashboard tiles), Adapter (for platform-specific WebViews and TTS backends), and Repository (for AI tool data access). The Dart code itself is well-structured and demonstrates professional Flutter development practices. Beyond basic reading, it features deep AI integration (chat, summarization, content analysis via configurable providers), text-to-speech with multiple backends, WebDAV synchronization, a customizable statistics dashboard, and a full annotation system. The project is actively maintained with a sophisticated CI/CD pipeline targeting Windows, macOS, Linux, Android, iOS, and OpenHarmony. The Dart code demonstrates high craftsmanship, particularly in the AI tool framework, the dashboard tile system, and the platform abstraction layers. These components are well-isolated and could be extracted for reuse in other Dart projects. The primary risk is the tight coupling to the external foliate-js JavaScript engine and the reliance on multiple third-party AI and TTS APIs, which introduces external dependency risk and potential for API drift.