Peter Thiessen focused on improving form reliability in the cds-snc/platform-forms-client repository by addressing a bug related to address form country initialization. He ensured that the country field defaults to "CAN" when users do not interact with the dropdown, preventing null values and maintaining consistent validation across submissions. This adjustment reduced user friction and improved data integrity for address entries, minimizing downstream validation errors. Peter applied his expertise in front end development using React and TypeScript, demonstrating careful attention to edge-case handling and stability. Over the month, he concentrated on backend robustness rather than feature development, delivering targeted, quality improvements.