Peter Csuka developed Base32 Hex Extended Alphabet support for the gchq/CyberChef repository, expanding the platform’s encoding and decoding capabilities. He integrated a new alphabet option into the FromBase32 and ToBase32 operations, enabling interoperability with systems that require the extended Base32 alphabet. Using JavaScript and TypeScript, Peter applied test-driven development to deliver comprehensive unit tests covering both standard and extended Base32 across a variety of inputs. His work preserved backward compatibility with existing functionality while broadening data interchange options. The depth of testing and careful integration ensured reliable, maintainable code that enhances CyberChef’s cryptography and encoding/decoding features.