During January 2026, Wenzhao Huang developed transactional messaging support for Pulsar Functions in the apache/pulsar repository, focusing on enhancing reliability in stream processing. By implementing transaction management in Java, Wenzhao enabled atomic publication of messages across multiple topics without requiring changes to existing user code. This approach wrapped message processing within managed transactions, ensuring that either all messages were published successfully or none were, thereby improving end-to-end consistency. The work addressed requirements outlined in PIP-439 and was delivered as a single feature, demonstrating depth in both Apache Pulsar internals and stream processing reliability, though no bug fixes were recorded.