- README.md, PROTOCOL.md: Python, Rust 추가 - .gitignore: python/, rust/ 빌드 아티팩트 규칙 추가 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Protobuf-based binary TCP socket library - ProtobufClient / ProtobufServer abstract classes with heartbeat - Type-based message routing via Communicator - 4-byte big-endian length-prefixed framing protocol - 8 integration tests (all passing) - PROTOCOL.md wire format specification - VSCode launch.json for test runner Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>