- Add legacy alias support for backward compatibility
- Update ProtocolBuffer message definitions with new fields
- Implement fullname-based message routing
- Add alias fallback logic in all language clients (Dart, Go, Kotlin, Python, TypeScript)
- Update test suites for alias and fullname validation
- Add protocol sync verification tools
- Update documentation (PORTING_GUIDE, PROTOCOL, VERSIONING)
- Add agent task documentation for protocol evolution
