In April 2025, Ben Kampmann focused on improving the matrix-org/matrix-rust-sdk by addressing a bug related to room state event processing. He implemented a targeted fix in Rust to ensure that previously added state events were preserved rather than overwritten, which enhanced state consistency across clients. To validate this change, Ben introduced a regression test that verifies correct event handling during processing. His work demonstrated a strong grasp of event processing, SDK development, and state management, resulting in clearer, more maintainable code. This contribution improved the reliability of room state synchronization and reduced the risk of inconsistent state for downstream users.