The architecture of a specific type of agent is comprised of the internal structure of that agent, i.e., the elements the agents of that type are composed of and the relation between these elements. Depending on the paradigm chosen to model the agents, this can be a simple class diagram, a set of goals, plans, and beliefs, or any other form of document that describes the internal composition of the agent.

In addition to the "static" part of the architecture, this document can also contain descriptions of the dynamics of the system. Possible notations are state machines, the conditions under which goals and plans are adopted, or sequence diagrams describing the internal flow of information.