- Dart: Add explicit Future<void> return type to send() method
- Dart: Improve onDisconnected() logic with proper isAlive handling and heartbeat response
- Go: Introduce baseClient generic base class for shared client logic
- Go: Refactor TcpClient and WsClient to embed baseClient instead of embedding Communicator
- Remove duplicate heartbeat and disconnect handling code across client implementations
- Clean up unused imports (time package)
- Add Close() method to Communicator for proper resource cleanup
- Move examples from go/example/ to go/examples/
- Move test files to go/test/ directory
- Add cross-test files for Dart-Go interop testing
- Add comprehensive test suite (tcp, ws, tls, heartbeat tests)
- Add crosstest directory for multi-language testing
- Add SKILL documentation for adding crosstest languages
- Add WebSocket binary frame support to protocol specification
- Update README and PROTOCOL.md to reflect dual TCP/WebSocket transport
- Add Go implementation with TCP, WebSocket, and heartbeat support
- Include .claude settings configuration
