An agent needs to recall facts from conversations that occurred weeks ago, while also maintaining full context of the current conversation turn. Which memory architecture is most appropriate?
Answer: Hybrid: keep recent turns in-context and retrieve relevant older memories from external storage
Hybrid architecture combines the recency bias of in-context memory (recent turns are most relevant) with the scalability of external storage for long-term recall. Pure in-context (A) cannot fit weeks of history. Pure external (B) would retrieve old memories but lose the coherence of the current conversation flow. Episodic (D) discards middle turns which may contain critical context.