What are LangGraph's five agent memory types?

Short-term (thread history), long-term (vector facts), episodic (cross-thread events), semantic (concept graphs), entity (tracked nouns). Each wired via checkpointer or store.

How do I run LangGraph memory demos locally?

pip the deps, set OPENAI_API_KEY, copy the full script. InMemory backends — zero DB setup.

Does LangGraph memory fix stateless LLM problems?

Yes — injects history/tools precisely into context windows, checkpointed durably.

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LangGraph's Five Memory Types Wired Up: Code That Doesn't Forget

Forget stateless LLMs ruining your agents. This deep dive into LangGraph's five memory types delivers copy-paste code that persists conversations, preferences, and knowledge across sessions.

DevTools Feed Apr 03, 2026 4 min read 23 views

LangGraph code demo showing short-term memory persisting codename across invokes

⚡ Key Takeaways

Checkpointer for per-thread state, Store for cross-thread persistence — mixing kills agents. 𝕏
Context window rules all; memory infra curates what's injected. 𝕏
Runnable code for all five types positions LangGraph as dev-friendly agent king. 𝕏

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