During February 2026, Zan Richard focused on parser maintenance for the hibernate-orm repository, addressing a nuanced bug in HQL query parsing. He improved the grammar rules to ensure the NOT keyword was correctly distinguished from identifiers, reducing ambiguity in complex query scenarios. Using ANTLR and applying skills in grammar design and parser development, Zan clarified the parser’s handling of NOT across various contexts. This targeted fix enhanced query correctness and reliability, particularly during migrations, and was directly linked to issue HHH-20053. The work demonstrated careful analysis and precise implementation, contributing to more robust query language support in Hibernate ORM.