mdast-util-mdx extends the Markdown Abstract Syntax Tree (mdast) ecosystem to support MDX. It specifically handles MDX syntax, including JSX, expressions, and import/export statements, enabling tools to parse and manipulate MDX documents effectively. This utility facilitates the creation of plugins and processors that can understand and transform MDX content, broadening the possibilities for document manipulation within the unified ecosystem. It allows working with the MDX format within the mdast-compliant parser.