Ted K worked on the gchq/CyberChef repository, developing an Ethernet frame parser that extracts source and destination MAC addresses, VLAN tags, and packet data, with integrated IPv4 header parsing. Using JavaScript and network programming techniques, Ted enabled cascading parsing behavior, allowing the IPv4 header operation to interoperate seamlessly with the new Ethernet frame parser. He also addressed a VLAN ID extraction bug, correcting the calculation logic and updating the associated tests to ensure accuracy. Ted’s contributions demonstrated a methodical approach to protocol parsing and test-driven development, enhancing the reliability and extensibility of CyberChef’s network data processing capabilities.