Worked on the facebook/pyrefly repository to deliver a critical stability fix for TSP Multi-Connection IPC, focusing on improving the reliability of read-only TSP operations. Addressed a complex concurrency issue where clients could hang indefinitely by ensuring extra IPC connections are safely opened, used, and closed, with thread shutdown properly sequenced to close signals. Enhanced IPC write semantics so that success is only reported after the writer thread confirms completion, making error handling more robust. The work involved local validation across various concurrent scenarios and was implemented using Rust, leveraging expertise in IPC, concurrent programming, and system programming to stabilize client interactions.