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# 向量记忆系统 - 核心模块详解
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## VectorMemorySystem 核心方法
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### add_memory(content, metadata, importance)
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同时写入向量库 + SQLite
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```python
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vm.add_memory(
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content="用户喜欢喝不加糖的咖啡",
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metadata={"category": "preference", "tags": ["咖啡", "口味"]},
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importance=4 # >=4 核心记忆
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)
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```
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### search(query, top_k)
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语义搜索,返回相似记忆
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```python
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results = vm.search("股票预警")
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# 返回: [{id, content, distance, metadata}, ...]
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```
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### hybrid_search(query, keyword, top_k)
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混合搜索:语义 + 关键词过滤
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```python
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results = vm.hybrid_search("铜陵", keyword="有色")
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```
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## MemoryTierManager 分层规则
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| 重要性 | 层级 | 说明 |
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|--------|------|------|
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| >= 4 | core | 永久记忆,不删除 |
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| 2-3 | hot | 常用记忆,30天后可归档 |
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| < 2 | cold | 冷记忆,自动归档 |
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## 数据存储位置
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```
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~/openclaw-memory-vector/data/memory/
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├── memory.db # SQLite(所有记忆的原始文本)
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└── chroma/ # Chroma(向量索引)
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├── *.bin # 向量数据
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└── *.sqlite # Chroma 元数据
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```
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## 备份与恢复
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### 备份
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```bash
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tar -czvf openclaw-memory-vector.tar.gz ~/openclaw-memory-vector/data/memory/
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```
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### 恢复
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```bash
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tar -xzvf openclaw-memory-vector.tar.gz -C ~/
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```
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## 环境变量
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| 变量 | 说明 |
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|------|------|
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| SILICONFLOW_API_KEY | 硅基流动 API Key |
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## 成本估算
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- BGE-M3 向量模型:**免费无限**
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- 硅基流动大模型:2000万 Tokens/月
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- **总成本:≈ ¥0**
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