During March 2026, this developer contributed foundational Puffin file format data structures to the apache/iceberg-cpp repository, focusing on C++ development and file format design. They implemented core structs such as Blob, BlobMetadata, and FileMetadata, along with a PuffinCompressionCodec enum supporting codec name conversions. Their approach emphasized clean, testable APIs for serialization and deserialization, laying groundwork for future Puffin integration and data exchange. The work also included standard constants and ToString utilities to enhance debugging and logging. While the contribution was limited to one feature, it demonstrated depth in data structure design and attention to maintainability within the codebase.