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%%{init: { 'flowchart':{'nodeSpacing':35}, 'theme':'neutral'}}%%
graph TB
    %% 全部外部组件统一放在左侧，从上往下排布，和原图完全一致
    T["task prompts"]
    TD["tools definitions"]
    CTX["context"]
    TE["tools executors"]

    subgraph agent_program["agent program"]
        direction LR
        PM["prepare messages"]
        CL["check end condition"]
        HM["handle new message"]
    end

    END_LOOP(( ))
    LLM["LLM"]

    %% 输入：左侧全部指向 prepare messages
    T -- inject instructions --> PM
    TD -- load schemas --> PM
    CTX -- inject history --> PM

    %% 主循环
    PM -- send messages --> LLM
    LLM -- response message --> CL

    CL -- end the loop --> END_LOOP
    CL --> HM

    %% 输出：handle new message 回连左侧的context、tools executors
    HM -- update context --> CTX
    HM -- call tools --> TE