# RAG

## 架构

```mermaid
flowchart LR
    Query --> Understanding
    Understanding --> BM25
    Understanding --> Vector
    Understanding --> Graph
    BM25 --> Fusion
    Vector --> Fusion
    Graph --> Fusion
    Fusion --> Reranker
    Reranker --> Compression
    Compression --> LLM
```

## 检索

采用 Hybrid Retrieval：

- Keyword
- BM25
- Vector
- Graph
- Metadata Filter

最终通过 Reranker 与 Context Compression 提高上下文质量。