Episodic Memory
Memory of specific past events, conversations, and interactions, allowing the agent to recall what happened in previous sessions.
Last updated: April 26, 2026
What Is Episodic Memory?
Episodic memory in agents is the equivalent of human memory for specific events. "Last Tuesday Alice asked us to cancel her order #4821, we cancelled it, and she was upset about the restocking fee." That episode survives between sessions and is retrievable when relevant. Storage is typically a vector database keyed by user or thread, with each episode stored as a summary plus full transcript. Retrieval pulls the most-relevant past episodes by similarity to the current conversation. Episodic memory is what makes a chat agent feel like it remembers you instead of starting cold every time.
When Should You Use Episodic Memory?
Add episodic memory as soon as you have repeat users. The cold-start feel of every conversation is the #1 complaint about chat agents that lack it.
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Building with Episodic Memory?
I've shipped this pattern in real production systems. If you want a second pair of eyes on your architecture, that's what I do.