Goal is to have lightweight package with annotations only which can be easily distributed with API contracts assembly (MessagePack.Annotations).

Annotations to move to new assembly:

Attributes:

• IgnoreMemberAttribute
• KeyAttribute
• MessagePackFormatterAttribute
• MessagePackObjectAttribute
• SerializationConstructorAttribute
• UnionAttribute

Interfaces:

• IMessagePackSerializationCallbackReceiver

see https://github.com/alphacloud/MessagePack-CSharp/tree/feature/annotations-package