Worked on the checkstyle/checkstyle repository to modernize the Javadoc Abstract Syntax Tree (AST) representation, focusing on aligning Javadoc token types with an updated AST structure for HTML elements and FIELD_TYPE. This involved AST manipulation and parsing using Java, enhancing the accuracy of Javadoc parsing and code analysis throughout the codebase. The changes improved the reliability of documentation checks and established a foundation for future tooling compatibility. By updating the AST format, the work addressed evolving requirements for Javadoc analysis, ensuring that the repository’s documentation processing remains robust and adaptable to future enhancements in Java development and code quality tooling.