# 系统架构

## 核心模块

- Client
- BFF
- Agent Runtime
- Model Gateway
- Memory Manager
- Planning Engine
- Tool Runtime
- RAG
- Event System
- Data Layer
- Observability

## 调用关系

```mermaid
flowchart LR
    Client --> BFF
    BFF --> Runtime
    Runtime --> Model
    Runtime --> Memory
    Runtime --> Planner
    Planner --> Tools
    Tools --> External
    Runtime --> Events
    Runtime --> Observability
```

模块之间优先使用明确接口，不允许跨层直接访问内部实现。