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**We have released the ChatDev Python SDK (PyPI package `chatdev`)**, so you can also run YAML workflow and multi-agent tasks directly in Python. For installation and version details, see [PyPI: chatdev 0.1.0](https://pypi.org/project/chatdev/0.1.0/).
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Copy file name to clipboardExpand all lines: docs/user_guide/en/modules/memory.md
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model: text-embedding-3-small
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```
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### Mem0 Memory Config
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```yaml
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memory:
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- name: agent_memory
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type: mem0
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config:
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api_key: ${MEM0_API_KEY}
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agent_id: my-agent
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```
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## 3. Built-in Store Comparison
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| Type | Path | Highlights | Best for |
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| --- | --- | --- | --- |
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| `simple` | `node/agent/memory/simple_memory.py` | Optional disk persistence (JSON) after runs; FAISS + semantic rerank; read/write capable. | Small conversation history, prototypes. |
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| `file` | `node/agent/memory/file_memory.py` | Chunks files/dirs into a vector index, read-only, auto rebuilds when files change. | Knowledge bases, doc QA. |
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| `blackboard` | `node/agent/memory/blackboard_memory.py` | Lightweight append-only log trimmed by time/count; no vector search. | Broadcast boards, pipeline debugging. |
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| `mem0` | `node/agent/memory/mem0_memory.py` | Cloud-managed by Mem0; semantic search + graph relationships; no local embeddings or persistence needed. Requires `mem0ai` package. | Production memory, cross-session persistence, multi-agent memory sharing. |
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All stores register through `register_memory_store()` so summaries show up in UI via `MemoryStoreConfig.field_specs()`.
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- **Retrieval** – Returns the latest `top_k` entries ordered by time.
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- **Write** – `update()` appends the latest snapshot (input/output blocks, attachments, previews). No embeddings are generated, so retrieval is purely recency-based.
- **Entity scoping**: `user_id` and `agent_id` are independent dimensions — both can be included simultaneously in `add()` and `search()` calls. When both are configured, retrieval uses an OR filter (`{"OR": [{"user_id": ...}, {"agent_id": ...}]}`) to search across both scopes. Writes include both IDs when available.
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- **Retrieval** – Uses Mem0's server-side semantic search. Supports `top_k` and `similarity_threshold` via `MemoryAttachmentConfig`.
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- **Write** – `update()` sends only user input to Mem0 via the SDK (as `role: "user"` messages). Assistant output is excluded to prevent noise memories from the LLM's responses being extracted as facts.
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- **Persistence** – Fully cloud-managed. `load()` and `save()` are no-ops. Memories persist across runs and sessions automatically.
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