Aihsan Nergiz developed a feature for the cloudflare/agents repository that introduced Base64 encoding for MCP message headers, enhancing security and data integrity in agent communications. Using JavaScript and TypeScript, Aihsan implemented encoding of outbound MCP_MESSAGE_HEADER fields and decoding on inbound messages, ensuring reliable data transfer. The work also included support for Unicode JSON payloads, enabling robust internationalization across the system. Automated tests were added to verify both the encoding and decoding processes as well as Unicode handling. This focused engineering effort improved the reliability and interoperability of MCP communications, with clear commit history and comprehensive test coverage.