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What are the types of agent memory (short-term, long-term, episodic, semantic), and how do you use each?

Agents need memory beyond the context window, and 'just store the history' is the wrong answer. The signal is distinguishing the memory types and mapping each to a storage and retrieval strategy. Here is the answer.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Agents need memory beyond the context window, and 'just store the history' is the wrong answer. The signal is distinguishing the memory types and mapping each to a storage and retrieval strategy. Here is the answer.

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LEARN THE BACKGROUND

These lessons teach the material this question tests, in order and from the beginning.

Agent Engineering·Memory and contextSign in13mMemory is four problems wearing one wordDiscussions about agent memory go in circles because four different problems share the name. Separating them turns an unbounded design question into four bounded ones, each with a known answer.
UP NEXT ON YOUR JOURNEY
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