@zenuml/core is the foundation of the ZenUML ecosystem, providing core functionalities for parsing, validating, and processing ZenUML text diagrams. It includes the engine for converting ZenUML syntax into an abstract syntax tree (AST) and manipulating it. Other ZenUML components rely on this package for interpreting diagram definitions and generating visual representations. Developers integrating ZenUML into their projects can leverage it to programmatically work with ZenUML diagram data.