Worked on the tokio-rs/tokio repository to enhance the reliability of broadcast channels under backpressure, focusing on clarifying and stabilizing receiver lagging semantics. Addressed a bug by refining the code to make lagging behavior more predictable for slow receivers, reducing the risk of data loss in real-time workloads. Expanded documentation to detail capacity rounding, message miss counts, and cursor advancement after lag events, ensuring users understand the broadcast API’s behavior. Reinforced the solution with comprehensive integration tests covering slow receivers, overflow scenarios, and asynchronous message receipt. Utilized Rust, asynchronous programming, and concurrency concepts to deliver robust and well-tested improvements.