# Agents (Subsystem of AIMA Code)

The agents subsystem covers the code in Part I of the book: the basic environment simulator `run-environment`; simulations for the vacuum and wumpus worlds, and some simple agents for those worlds. It also includes the abstract class `grid-environment`, which is an environment that supports physical objects located in a two-dimensional rectangular grid of spaces. It serves as the basis for the vacuum and wumpus worlds, as well as for more complex environments like the shopping world of Chapter 8.