Peter Csuka developed Base32 Hex Extended Alphabet support for the gchq/CyberChef repository, expanding the platform’s encoding and decoding capabilities. He introduced a new alphabet option and integrated it into both FromBase32 and ToBase32 operations, ensuring seamless interoperability with systems requiring the extended Base32 standard. His approach emphasized reliability by delivering comprehensive unit tests for both standard and extended Base32 across a variety of inputs, maintaining backward compatibility throughout. Working primarily with JavaScript and TypeScript, Peter applied cryptography and encoding/decoding expertise to enhance data interchange readiness, demonstrating a methodical, test-driven development process that improved product robustness and integration flexibility.