Treats agent memory as managed tiers past the context window.
The context window is treated as physical memory, with a larger external store behind it. The analogy is virtual memory in an operating system.
The model itself issues function calls to move information between the two tiers, deciding what to page in and what to write out. Nothing outside the model decides what is worth remembering.
That lets a conversation or a document run past the context limit. The pattern generalizes past the specific system: give the model an addressable store and the tools to manage it.