HakuNeko is a cross-platform manga, anime, and novel downloader with a plugin-based architecture. It scrapes content from hundreds of websites using a decorator-driven pattern that allows declarative extraction of manga, chapters, and pages. The application supports multiple frontends (Svelte-based Classic and Fluent-core), desktop runtimes (Electron and NW.js), and includes features like bookmark management, download queues, image descrambling, DRM decryption, and anti-scraping evasion. The core engine provides reusable abstractions for task pooling, rate limiting, storage, and platform-specific IPC. While the codebase is large and actively maintained, it shows signs of technical drift through legacy stubs, hardcoded secrets, and fragile anti-scraping logic that requires constant updates as target websites change.