A LangGraph chat agent (qwen3.5:4b via local Ollama) that uses both kinds of LangGraph memory:
| Memory | LangGraph piece | Keyed by | What it keeps |
|---|---|---|---|
| Short-term | SqliteSaver checkpointer |
thread_id |
Full message history of one conversation |
| Long-term | SqliteStore store |
user_id |
Facts saved with the remember tool, shared across all of that user's conversations |
Both are stored in memory.db, created in the directory you run from (git-ignored).
Requires uv and a running Ollama.
ollama pull qwen3.5:4b
cp .env.example .env # edit settings as needed
uv run agent.py --user alice # new conversation
uv run agent.py --user alice --thread <id> # resume one (id is printed on exit)Tell it something ("I prefer metric units"), quit, start a new thread, and it will still know.
MIT, see LICENSE.
