Wanlp Lab enhanced the Lucene104PostingsFormat encoding documentation in the apache/lucene repository, focusing on clarifying how document IDs are encoded when handling 259 documents using packed and VInt blocks. By providing detailed explanations and examples, Wanlp improved the accuracy and accessibility of technical documentation, which helps reduce onboarding time for new developers and minimizes the risk of encoding misinterpretation during future refactors. The work was completed using Java and strong documentation skills, emphasizing maintainability and cross-team clarity. Although no bugs were fixed during this period, the contribution addressed a nuanced aspect of Lucene’s encoding strategy with technical depth.