Worked on the JetBrains/Avalonia repository to enhance security for password input fields by developing a feature that prevents key modifiers from affecting word-based editing in password boxes. This approach focused on reducing the risk of information leakage through unintended text manipulation, ensuring that password fields remain isolated from behaviors that could compromise privacy. The implementation included comprehensive unit testing to verify that no sensitive data could be exposed, while maintaining stability and compatibility for non-password text fields. Utilized C# for both UI development and security-focused logic, with clear commit traceability to support maintainability and facilitate future code reviews or audits.