The sgs-client-api package produces a jar artifact which includes only the core classes required at compile time to develop a darkstar client application
'org.reddwarfserver.client:sgs-client-api:0.10.0'
<dependency>
<groupId>org.reddwarfserver.client</groupId>
<artifactId>sgs-client-api</artifactId>
<version>0.10.0</version>
</dependency>
<dependency org="org.reddwarfserver.client" name="sgs-client-api" rev="0.10.0"/>
"org.reddwarfserver.client", "sgs-client-api", "0.10.0"