Worked on the Shopify/rails repository to address a critical reliability issue in ActionController::Live streaming by delivering a targeted bug fix that improved system stability when clients disconnect unexpectedly. Applied expertise in backend development, concurrency, and multithreading with Ruby to ensure that the consumer thread exits promptly by enqueuing a nil terminator during abort operations, aligning abort semantics with close. Expanded the test suite to cover abort and close-then-abort scenarios, reducing the risk of deadlocks and thread leaks in long-running streaming requests. This work enhanced reliability and maintainability, demonstrating a methodical, test-driven approach to complex concurrency challenges.