In April 2025, Andrew contributed to the hashicorp/vault repository by refactoring the ExternalTokenHelper to execute commands directly at the process level, bypassing the shell to reduce overhead and improve reliability. He introduced an Args field, enabling flexible argument passing for command execution without requiring code changes. This enhancement improved the maintainability and clarity of the token handling workflow, making it more robust across different environments. Andrew’s work focused on backend development using Go, leveraging process-level command execution and code refactoring techniques. The depth of the changes provided a foundation for easier future enhancements and more reliable token management.