Chapter 12 of 23 · Level 5 · Building Single AgentsMemory & Context EngineeringWorking vs long-term memory, compression, context engineering, and state persistence.This chapter is taught inside another chapter's unit.12Building a Single Agent Is a Loop With a GoalA single agent is not clever wiring. It is one loop that plans, acts, remembers, and corrects toward a goal. Its quality is decided by one thing: what you let into the context window.8 min read→