Agents are the parts of an element that define their behaviour. The behaviour of elements ultimately define the physiology or the behaviour of the overall simulation created with the G System. This makes agents a very important part of the G System. In particular agents are exactly what is used to customize the simulation to the needs of the particular usage. This also means that agents need to be created by people not directly developing the G System itself. To allow everyone to develop custom agents, a plugin architecture is used. Agents can thus be developed independently of the G System framework distribution. The plugin architecture takes care of dynamically loading agents into the simulation. It is even possible to update agents during runtime by unloading and reloading a particular plugin. The G World Engine actually takes care of loading and creating GCS::GAgent objects from libraries. The responsible class is the GWE::GAgentPluginManager which implements dynamic library loading and plugin instantiation. Any kind of agents can be loaded this way. The GWE::GAgentPluginManager class is also used by the GWE::GCoreXmlSerializer class to actually create agents specified by the XML document. Since the G System is a distributed simulation, it is necessary to somehow inject a plugin into a running simulation. This works by installing the plugin into the topmost GWE Server, this server automatically further distributes the library file to all direct child GWE Servers which in turn do the same. This way a new plugin gets automatically known to the complete server infrastructure. TO BE WRITTEN