Ghadi worked on the clojure/core.async repository, focusing on stabilizing multichannel semantics and improving the performance of blocking operations in Clojure. He addressed nondeterminism in multichannel tests by restructuring the test setup to ensure predictable outcomes, creating new channels, managing multiple consumers, and sequencing channel closure and input. Additionally, he refactored core.async’s blocking operations to support on-caller execution, allowing callbacks to run on the caller’s thread and reducing dispatch overhead. Using skills in asynchronous programming, concurrency, and testing, Ghadi’s work enhanced test reliability and throughput for high-concurrency workloads, resulting in faster feedback cycles and more robust CI processes.