RAG

  graph LR
    subgraph "Query Process 💬 问答流程"
        direction TB
        Q1((用户问题)) --> Q2{{"Embedding模型🧮<br>向量化"}}
        Q2 --> Q3{"检索Retrieval🔍<br>计算相似度（topK）"}
        Q3 -.查询.-> VectorDB
        VectorDB -.topk个结果.-> Q3
        Q3 --> Q4[["相关片段📄"]]
        Q4 -.注入上下文.-> Q5("增强/Augmented🔀<br>Prompt=问题+相关片段")
        Q1 -.原始问题.-> Q5
        Q5 -.输入.-> Q6{{"大语言模型🤖"}}
        Q6 --> Q7[["最终回答💬"]]
    end
    
    subgraph "Index Process 🔧 离线数据准备"
        direction TB
        KB["(私有知识库📚<br>PDF/Word/Wiki)"] --> Chunking("切片/Chunking🔪<br>长文本切分成小段")
        Chunking --> Embedding{{"Embedding模型🧮<br>向量化"}}
        Embedding --> VectorDB["(向量数据库🗄️<br> VectorDB ..)"]
    end
    
    style KB fill:#e1f5ff,stroke:#007acc,stroke-width:2px
    style VectorDB fill:#e1f5ff,stroke:#007acc,stroke-width:2px
    style Q1 fill:#fff2cc,stroke:#d6b656,stroke-width:2px
    style Q7 fill:#d5e8d4,stroke:#82b366,stroke-width:2px
    style Embedding fill:#f0e1ff,stroke:#9673a6,stroke-width:2px
    style Q6 fill:#f0e1ff,stroke:#9673a6,stroke-width:2px
    style Q4 fill:#ffe6cc,stroke:#d79b00,stroke-width:2px

MCP

  sequenceDiagram
User->>MCP Client/IDE/Agent:User Query(今天天气怎么样？)
MCP Client/IDE/Agent->>MCP Server:连接 MCP Server & Get Tools
MCP Server->>MCP Client/IDE/Agent:Tools List(文件工具、天气工具...)
MCP Client/IDE/Agent->>LLM:User Query(今天天气怎么样？) + Tools List(这些工具可以用)
LLM->>MCP Client/IDE/Agent: 建议调用的Tool + 参数(建议使用天气工具 参数:date:'20260127',city:'武汉')
MCP Client/IDE/Agent->>MCP Server:使用参数调用Tool(天气工具(date, city))
MCP Server->>MCP Server:内部触发逻辑
MCP Server->>MCP Client/IDE/Agent:返回值/Error(temp:30°, weather:sunny)
MCP Client/IDE/Agent->>LLM: Tool的返回值(temp:30°, weather:sunny)
note over LLM: 思考、推理
LLM->>MCP Client/IDE/Agent:总结归纳后的自然语言(明日(20260127)天气为晴天，温度30°，建议穿凉爽的衣服)
MCP Client/IDE/Agent->>User: 格式化结果

Agent React

  graph RL
    Input((Task/Input<br>任务输入)) --> Thought["Thought<br>思考: 分析任务，决定步骤"]
    
    subgraph ReAct_Loop ["ReAct Loop 循环"]
        direction TB
        Thought --> Action{Action<br>行动: 选择工具/动作}
        Action -- 调用工具 --> Execute["Environment/Tool<br>执行环境/工具"]
        Execute --> Observation["Observation<br>观察: 获取执行结果"]
        Observation --> Thought
    end
    
    Action -- 任务完成 --> Final["Final Answer<br>最终回答"]
    
    style Input fill:#fff2cc,stroke:#d6b656,stroke-width:2px
    style Final fill:#d5e8d4,stroke:#82b366,stroke-width:2px
    style Thought fill:#e1f5ff,stroke:#007acc,stroke-width:2px
    style Action fill:#f0e1ff,stroke:#9673a6,stroke-width:2px
    style Observation fill:#ffe6cc,stroke:#d79b00,stroke-width:2px