Hexo is a mature, plugin-driven static site generator written in TypeScript for Node.js. It transforms Markdown (or other markup) content into a fully static website, supporting themes, helpers, tags, filters, and generators via a consistent extension API. The core architecture centers on a `Hexo` class that orchestrates configuration loading, plugin registration, file watching (via `Box`), content processing (processors), rendering (renderers with Nunjucks and highlight.js/prism), and static file generation. It includes a built-in CLI (`hexo new`, `hexo generate`, `hexo deploy`, etc.) and a lightweight database (`warehouse`) for metadata. The codebase is well-tested with extensive unit tests and CI across multiple OS/Node versions. While the architecture is clean and extensible, some technical debt exists (e.g., reliance on `bluebird` promises, `@ts-expect-error` workarounds, and complex regex-based processing).