In December 2024, Jingcheng Cheng developed the initial EqSat PDLMatcher integration for the PDL interpreter within the xdsl repository. He implemented a new matcher class in Python, focusing on interpreter development and pattern matching to support EqSat e-class operations. To ensure correctness and maintainability, he added unit tests that verify both matching types and fixed types, laying the groundwork for future enhancements. The work improved test coverage and established a reliable foundation for type-based matching in the interpreter. No major bugs were reported during this period, reflecting a focused and well-structured approach to feature delivery and code quality.