Code Sensei is a Visual Studio Code (VSCode) extension designed to annotate code using natural language. Its core functionality involves dissecting code line by line and enriching it with descriptive annotations. This tool proves invaluable for programmers grappling with complex code sections, elucidating code intricacies, and offering insights during code reviews. It also serves as a learning aid for novice developers, presenting existing code in a more understandable format. Code Sensei is not limited to individual developers; it serves as a valuable resource for training courses and online schools that aim to teach programming through practical code analysis. It can be customized to integrate seamlessly into educational platforms, enhancing programming language comprehension for students. This version incorporates keywords such as "AI SaaS tool," "Visual Studio Code extension," "code annotation," "natural language," "code comprehension," "programming education," "code review," "complex code," "novice developers," "educational platforms," and "practical code analysis," aimed at improving search engine visibility while maintaining clarity and relevance.