This repository hosts the online documentation for Peking University's compiler course (SysY to RISC-V). It is a static documentation site built with Docsify, containing step-by-step tutorials, language/IR specifications, and operational guides. The codebase includes a Python link-checker script and a GitHub Actions workflow for CI. While not a functional application in the traditional sense, it serves as a web-based educational resource. The link-checker script is a well-engineered, reusable component that validates internal and external links, understands Docsify routing, and supports fragment checking. The repository is actively maintained with a working CI pipeline.