Developed a new streaming JSON output capability for the protocolbuffers/protobuf repository, introducing the MessageToJsonStream method to enable direct conversion of protobuf messages to a JSON stream. This work involved updating internal parsing and unparsing logic in C++ to support efficient, stream-based JSON generation while preserving API compatibility and stability. By extending the existing JSON APIs in a non-breaking manner, the changes addressed previous limitations and improved memory efficiency for large-scale protobuf-to-JSON conversions. The solution leveraged expertise in C++ development, Protocol Buffers, and stream processing, enabling real-time data handling in streaming pipelines and enhancing the library’s overall utility.