In April 2025, Pieter Agten enhanced the fortanix/rust-sgx repository by implementing a safe data persistence feature for evaluation data. He developed the write_to_file_if_not_exist method on RawTcbEvaluationDataNumbers, ensuring that evaluation data is only written if the target file does not already exist, thereby preventing accidental overwrites and simplifying data management. This approach introduced an idempotent persistence path, reducing operational risk and improving data integrity across evaluation runs. Pieter utilized Rust, focusing on file I/O and struct design, and maintained clear traceability through concise commit messaging, resulting in maintainable, auditable code with a well-defined API surface.