# Semantic Memory

> Memory organized around durable facts, user preferences, and reusable knowledge.

- Category: Context & Memory
- Stage: Emerging
- Also called: Fact memory, Knowledge memory
- Canonical: https://www.joelcsaji.com/ai-dictionary/semantic-memory

## Plain English

It remembers what should stay true across sessions.

## Example

A personal assistant stores the user's home airport, writing style, and recurring project names.

## Why it matters

Semantic memory makes agents feel personal and efficient, but it needs consent and cleanup controls.

## Related

- [Memory](https://www.joelcsaji.com/ai-dictionary/memory)
- [Context Engineering](https://www.joelcsaji.com/ai-dictionary/context-engineering)
- [Memory Poisoning](https://www.joelcsaji.com/ai-dictionary/memory-poisoning)

## Sources

- [LangChain: Long-Term Memory](https://docs.langchain.com/oss/python/deepagents/long-term-memory)
- [OWASP Agentic AI Top 10](https://genai.owasp.org/2025/12/09/owasp-top-10-for-agentic-applications-the-benchmark-for-agentic-security-in-the-age-of-autonomous-ai/)