expressive-code

Expressive-Code is a text marking and annotation engine designed for developers and technical writers to present source code on the web with rich, customizable visual highlights and inline notes. It allows users to add callouts, line highlights, and interactive annotations directly to code blocks, making tutorials, documentation, and blog posts more engaging and easier to follow. Its interesting because it bridges the gap between static code snippets and dynamic, instructional content without requiring complex build tools or heavy JavaScript.