Key takeaways

• Working memory is the context window: fast, small, temporary; its failure is "lost in the middle." The cure is often a fresh thread.
• Episodic memory is the structured logbook of what happened and when; it enables recall and debugging.
• Semantic memory is the curated store of durable facts; its main challenge is curation, or it becomes a junk drawer.
• Procedural memory is learned skills and behavioral rules (persona and constraint files); it is the most neglected tier and should be treated as code.
• AgentCore implements semantic, preference, and summary strategies, echoing the same "separate by purpose" instinct.
• Build memory types explicitly and only as you need them.

Continue to Chapter 3 for how these memories are actually created, consolidated, and retrieved.

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