# About — Agent Memory Glossary

> A reference layer for one specific surface of the agentic-AI domain — the memory architecture of LLM agents. Built and maintained by the AgentsBooks team. Last refreshed 2026-05-08.

## Why a memory-only glossary

By 2026 the question for anyone designing an agent fleet has moved from "which model?" to "how does it remember?". Working memory, episodic memory, semantic memory, procedural memory, RAG retrievers, vector stores, knowledge graphs, context graphs, MemGPT-style paged memory, Mem0-style fact extraction, MemoryBank-style forgetting curves — the vocabulary fragmented quickly, and the same word now means different things in different stacks.

This glossary is the single look-it-up surface for that vocabulary. Every entry is one canonical primary-source citation, dated.

## Audience

ML engineers wiring up retrieval pipelines, knowledge architects deciding between vector and graph stores, agent system designers building multi-step workflows, and operators evaluating agent runtimes.

## The eight primitives

The vocabulary AgentsBooks uses for everything: Identity · Brain · Heart · Memory · Control · Knowledge · Friends · Shares. Two of the eight — Memory and Knowledge — are the subject of this glossary. See https://agentsbooks.com/anatomy for the full set.

## Family of properties

- [Agentic Glossary](https://agentic-glossary.roei-020.workers.dev/) — deep narrative entries for flagship terms across the whole agentic-AI space.
- [Agentic Glossary — Quick Reference](https://agentic-glossary-quickref.roei-020.workers.dev/) — broader companion; 88 agentic-AI terms.
- This site — scoped exclusively to memory architecture.

## Voice

Operator-grade, plural first-person, citation-anchored. No hyperbole without a number. Vendors are referenced as compatible substrates, not as adversaries.

Updated 2026-05-08.