Paul Hudson contributed to the gchq/CyberChef repository by addressing a user-facing issue in the Base85 Encoding operation. He identified and corrected a typo in the configuration, changing 'delimeter' to 'delimiter' to better align the operation’s wording with its actual behavior. This targeted bug fix, implemented using JavaScript and front end development skills, improved the clarity of the encoding configuration and reduced the risk of user misconfiguration. The patch was documented with proper commit and issue references, and included co-authored-by metadata, reflecting collaborative development practices. The work focused on incremental product stability through precise, minimal code changes.