Figure 9.2 Agent memory arranged by temperature. The hot core rides the context window permanently and pays rent on every call, so it is kept ruthlessly small; warm material is loaded when a matching task begins; the cold bulk waits in external storage until retrieval faults it back in. The circulation—write out what must survive, select back in what the step needs—is the virtual-memory pattern: a small desk and disciplined movement, producing the illusion of an unbounded one.
