Worked on the temporalio/cli repository to deliver configurable HTTP header support for the Temporal codec server within the CLI. This feature introduced the CodecHeader option to ClientOptions and updated the payloadCodecInterceptor, allowing the propagation of custom HTTP headers with each request. By enabling token-based authentication and custom metadata through header configuration, the work enhanced both security and integration flexibility for codec communications. The implementation leveraged Go and focused on API integration, CLI development, and gRPC technologies. Over the course of the month, the contribution addressed a targeted need for secure, adaptable communication between the CLI and the Temporal codec server.