Jesse McKenna developed new Windows File I/O tracing capabilities for the google/perfetto repository, focusing on enhancing system observability for file operations. He introduced protocol buffer definitions for File I/O ETW events and integrated them into the existing Perfetto Windows tracing pipeline. By extending EtwConfig with file_provider_events and defining events for file creation, directory enumeration, and read/write operations, Jesse enabled detailed telemetry and configuration of file system activity. His work leveraged expertise in Protocol Buffers, system tracing, and Windows internals, providing a deeper foundation for performance analysis and debugging of IO-heavy workloads within the Perfetto tracing ecosystem.