{"id":84231,"date":"2026-07-26T09:41:10","date_gmt":"2026-07-26T01:41:10","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/84231.html"},"modified":"2026-07-26T09:41:10","modified_gmt":"2026-07-26T01:41:10","slug":"react-agent-%e6%ba%90%e7%a0%81%e6%8b%86%e8%a7%a3%ef%bc%9aeino-%e5%a6%82%e4%bd%95%e6%8a%8a-graph-%e5%8f%98%e6%88%90-agent%ef%bc%88%e7%ac%ac64%e7%af%87-e50%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/84231.html","title":{"rendered":"ReAct Agent \u6e90\u7801\u62c6\u89e3\uff1aEino \u5982\u4f55\u628a Graph \u53d8\u6210 Agent\uff08\u7b2c64\u7bc7-E50\uff09"},"content":{"rendered":"<p>\u7cfb\u5217\u300c\u4f01\u4e1a\u7ea7 AI Agent \u5b9e\u73b0\u62c6\u89e3\u300dE50 \u7bc7&#xff0c;Part 10 \u751f\u4ea7\u5de5\u7a0b\u7bc7\u7b2c\u516b\u7ae0\u3002\u4e0a\u4e00\u7bc7 \u8bb2\u4e86 Graph \u7f16\u8bd1\u671f\u3002\u8fd9\u7bc7\u628a E47\u2013E49 \u7684\u6240\u6709\u79ef\u7d2f\u7528\u8d77\u6765&#xff1a;Eino \u7684 flow\/agent\/react \u662f\u600e\u4e48\u7528 Graph \u642d\u51fa ReAct \u5faa\u73af\u7684&#xff0c;\u6bcf\u4e2a\u8bbe\u8ba1\u51b3\u5b9a\u80cc\u540e\u7684\u539f\u56e0\u662f\u4ec0\u4e48\u3002<\/p>\n<h2>\u8bfb\u5b8c\u8fd9\u7bc7\u4f60\u4f1a\u77e5\u9053<\/h2>\n<ul>\n<li>Eino ReAct Agent \u7684 Graph \u7ed3\u6784&#xff1a;2 \u4e2a\u8282\u70b9 &#043; 2 \u6761\u5206\u652f &#043; 1 \u4e2a Lambda<\/li>\n<li>State \u5728 Agent \u91cc\u7684\u4f5c\u7528&#xff1a;\u6d88\u606f\u5386\u53f2\u600e\u4e48\u5728\u591a\u8f6e\u4e4b\u95f4\u7d2f\u79ef<\/li>\n<li>StreamToolCallChecker&#xff1a;\u4e3a\u4ec0\u4e48\u6d41\u5f0f\u6a21\u5f0f\u9700\u8981\u5355\u72ec\u5224\u65ad&#034;\u6709\u6ca1\u6709 tool call&#034;<\/li>\n<li>ToolReturnDirectly&#xff1a;\u67d0\u4e9b\u5de5\u5177\u5982\u4f55\u8df3\u8fc7 LLM&#xff0c;\u76f4\u63a5\u628a\u7ed3\u679c\u8fd4\u7ed9\u7528\u6237<\/li>\n<li>toolResultCollectorMiddleware&#xff1a;\u5de5\u5177\u7ed3\u679c\u5982\u4f55\u5728\u6267\u884c\u65f6\u88ab&#034;\u4fa7\u8def&#034;\u53d1\u9001<\/li>\n<li>MessageModifier vs MessageRewriter \u7684\u533a\u522b<\/li>\n<li>NewAgent \u91cc\u505a\u4e86\u4ec0\u4e48&#xff1a;\u4ece Config \u5230\u4e00\u4e2a\u53ef\u8c03\u7528\u7684 Runnable<\/li>\n<\/ul>\n<hr \/>\n<h3>ReAct \u5faa\u73af\u662f\u4ec0\u4e48<\/h3>\n<p>ReAct&#xff08;Reason &#043; Act&#xff09;\u662f\u6700\u5e38\u89c1\u7684 Agent \u6a21\u5f0f&#xff1a;<\/p>\n<p>\u7528\u6237\u8f93\u5165<br \/>\n  \u2193<br \/>\nLLM \u601d\u8003&#xff08;Reason&#xff09;<br \/>\n  \u251c\u2500 \u6709\u5de5\u5177\u8c03\u7528 \u2192 \u6267\u884c\u5de5\u5177&#xff08;Act&#xff09;\u2192 \u628a\u7ed3\u679c\u5582\u56de LLM \u2192 \u518d\u6b21\u601d\u8003<br \/>\n  \u2514\u2500 \u6ca1\u6709\u5de5\u5177\u8c03\u7528 \u2192 \u8f93\u51fa\u6700\u7ec8\u7b54\u6848<\/p>\n<p>\u8fd9\u4e2a\u5faa\u73af\u7684\u7279\u70b9\u662f\u6709\u73af\u2014\u2014LLM \u5b8c\u6210\u4e4b\u540e\u53ef\u80fd\u56de\u5230 LLM \u81ea\u8eab\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48 E48 \u8981\u6709\u4e24\u79cd channel \u7c7b\u578b&#xff1a;ReAct \u7528 Pregel \u6a21\u5f0f&#xff0c;\u800c\u4e0d\u662f DAG\u3002<\/p>\n<p>Eino \u628a\u8fd9\u4e2a\u5faa\u73af\u7f16\u7801\u6210\u4e86\u4e00\u4e2a Graph&#xff1a;<\/p>\n<p>START \u2192 ChatModel \u2192 [\u5206\u652f] \u2192 Tools \u2192 [\u5206\u652f] \u2192 ChatModel (\u5faa\u73af)<br \/>\n                          \u2198 END                \u2198 END (ReturnDirectly)<\/p>\n<hr \/>\n<h3>Graph \u7ed3\u6784&#xff1a;5 \u4e2a\u7ec4\u4ef6<\/h3>\n<p><span class=\"token comment\">\/\/ flow\/agent\/react\/react.go<\/span><\/p>\n<p>graph <span class=\"token operator\">:&#061;<\/span> compose<span class=\"token punctuation\">.<\/span>NewGraph<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    compose<span class=\"token punctuation\">.<\/span><span class=\"token function\">WithGenLocalState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>ctx context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span>state <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&amp;<\/span>state<span class=\"token punctuation\">{<\/span>Messages<span class=\"token punctuation\">:<\/span> <span class=\"token function\">make<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> config<span class=\"token punctuation\">.<\/span>MaxStep<span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u8f93\u5165\u662f\u6d88\u606f\u5217\u8868 []*schema.Message&#xff0c;\u8f93\u51fa\u662f\u5355\u6761\u6d88\u606f *schema.Message&#xff08;\u6700\u7ec8\u7b54\u6848&#xff09;\u3002State \u6301\u6709\u5b8c\u6574\u7684\u5bf9\u8bdd\u5386\u53f2\u3002<\/p>\n<h4>\u8282\u70b9 1&#xff1a;ChatModel&#xff08;chat&#xff09;<\/h4>\n<p>graph<span class=\"token punctuation\">.<\/span><span class=\"token function\">AddChatModelNode<\/span><span class=\"token punctuation\">(<\/span>nodeKeyModel<span class=\"token punctuation\">,<\/span> chatModel<span class=\"token punctuation\">,<\/span><br \/>\n    compose<span class=\"token punctuation\">.<\/span><span class=\"token function\">WithStatePreHandler<\/span><span class=\"token punctuation\">(<\/span>modelPreHandle<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    compose<span class=\"token punctuation\">.<\/span><span class=\"token function\">WithNodeName<\/span><span class=\"token punctuation\">(<\/span>modelNodeName<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>modelPreHandle \u662f\u8fd9\u4e2a\u8282\u70b9\u7684 preProcessor&#xff08;E48 \u8bb2\u8fc7&#xff09;&#xff1a;<\/p>\n<p>modelPreHandle <span class=\"token operator\">:&#061;<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>ctx context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">,<\/span> input <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">,<\/span> state <span class=\"token operator\">*<\/span>state<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">,<\/span> <span class=\"token builtin\">error<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    state<span class=\"token punctuation\">.<\/span>Messages <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">append<\/span><span class=\"token punctuation\">(<\/span>state<span class=\"token punctuation\">.<\/span>Messages<span class=\"token punctuation\">,<\/span> input<span class=\"token operator\">&#8230;<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">\/\/ \u628a\u65b0\u6d88\u606f\u8ffd\u52a0\u5230\u5386\u53f2<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> config<span class=\"token punctuation\">.<\/span>MessageRewriter <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        state<span class=\"token punctuation\">.<\/span>Messages <span class=\"token operator\">&#061;<\/span> config<span class=\"token punctuation\">.<\/span><span class=\"token function\">MessageRewriter<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> state<span class=\"token punctuation\">.<\/span>Messages<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">\/\/ \u5148 rewrite<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> messageModifier <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> state<span class=\"token punctuation\">.<\/span>Messages<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ modifier \u5728\u4e00\u4e2a\u526f\u672c\u4e0a\u64cd\u4f5c&#xff0c;\u4e0d\u4fee\u6539 state<\/span><br \/>\n    modifiedInput <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">make<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">,<\/span> <span class=\"token function\">len<\/span><span class=\"token punctuation\">(<\/span>state<span class=\"token punctuation\">.<\/span>Messages<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token function\">copy<\/span><span class=\"token punctuation\">(<\/span>modifiedInput<span class=\"token punctuation\">,<\/span> state<span class=\"token punctuation\">.<\/span>Messages<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token function\">messageModifier<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> modifiedInput<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>MessageRewriter vs MessageModifier \u7684\u533a\u522b&#xff1a;<\/p>\n<ul>\n<li>MessageRewriter&#xff1a;\u76f4\u63a5\u4fee\u6539 state.Messages&#xff0c;\u6539\u52a8\u4f1a\u6301\u4e45\u4fdd\u7559\u7ed9\u4e0b\u4e00\u8f6e\u3002\u9002\u5408\u538b\u7f29\u5386\u53f2&#xff08;\u6bd4\u5982\u8d85\u51fa context window \u65f6\u5220\u9664\u65e7\u6d88\u606f&#xff09;\u3002<\/li>\n<li>MessageModifier&#xff1a;\u5728\u526f\u672c\u4e0a\u64cd\u4f5c&#xff0c;\u4e0d\u5f71\u54cd state.Messages\u3002\u6539\u52a8\u53ea\u5bf9\u5f53\u524d\u8fd9\u6b21 LLM \u8c03\u7528\u751f\u6548\u3002\u9002\u5408&#034;\u6bcf\u6b21\u90fd\u52a0 System Prompt&#034;\u4f46\u4e0d\u60f3\u8ba9\u5b83\u51fa\u73b0\u5728\u5386\u53f2\u8bb0\u5f55\u91cc\u3002<\/li>\n<\/ul>\n<h4>\u8282\u70b9 2&#xff1a;ToolsNode&#xff08;tools&#xff09;<\/h4>\n<p>graph<span class=\"token punctuation\">.<\/span><span class=\"token function\">AddToolsNode<\/span><span class=\"token punctuation\">(<\/span>nodeKeyTools<span class=\"token punctuation\">,<\/span> toolsNode<span class=\"token punctuation\">,<\/span><br \/>\n    compose<span class=\"token punctuation\">.<\/span><span class=\"token function\">WithStatePreHandler<\/span><span class=\"token punctuation\">(<\/span>toolsNodePreHandle<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    compose<span class=\"token punctuation\">.<\/span><span class=\"token function\">WithNodeName<\/span><span class=\"token punctuation\">(<\/span>toolsNodeName<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>toolsNodePreHandle&#xff1a;<\/p>\n<p>toolsNodePreHandle <span class=\"token operator\">:&#061;<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>ctx context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">,<\/span> input <span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">,<\/span> state <span class=\"token operator\">*<\/span>state<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">,<\/span> <span class=\"token builtin\">error<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> input <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> state<span class=\"token punctuation\">.<\/span>Messages<span class=\"token punctuation\">[<\/span><span class=\"token function\">len<\/span><span class=\"token punctuation\">(<\/span>state<span class=\"token punctuation\">.<\/span>Messages<span class=\"token punctuation\">)<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span>  <span class=\"token comment\">\/\/ HITL resume \u65f6 input \u4e3a nil<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    state<span class=\"token punctuation\">.<\/span>Messages <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">append<\/span><span class=\"token punctuation\">(<\/span>state<span class=\"token punctuation\">.<\/span>Messages<span class=\"token punctuation\">,<\/span> input<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">\/\/ \u628a LLM \u7684 tool call \u6d88\u606f\u8bb0\u8fdb\u5386\u53f2<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5224\u65ad\u54ea\u4e2a\u5de5\u5177\u9700\u8981 ReturnDirectly<\/span><br \/>\n    state<span class=\"token punctuation\">.<\/span>ReturnDirectlyToolCallID <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">getReturnDirectlyToolCallID<\/span><span class=\"token punctuation\">(<\/span>input<span class=\"token punctuation\">,<\/span> config<span class=\"token punctuation\">.<\/span>ToolReturnDirectly<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> input<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u610f input &#061;&#061; nil \u7684\u5904\u7406&#xff1a;\u5f53 Graph \u88ab HITL \u4e2d\u65ad\u540e\u6062\u590d&#xff0c;\u8282\u70b9\u91cd\u8dd1\u65f6\u6ca1\u6709\u65b0\u8f93\u5165\u2014\u2014\u5b83\u4ece State \u91cc\u53d6\u6700\u540e\u4e00\u6761\u6d88\u606f\u6765\u7ee7\u7eed&#xff0c;\u4e0d\u4f1a\u91cd\u53d1\u5de5\u5177\u8c03\u7528\u3002<\/p>\n<h4>\u5206\u652f 1&#xff1a;ChatModel \u540e\u5206\u652f<\/h4>\n<p>modelPostBranchCondition <span class=\"token operator\">:&#061;<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>ctx context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">,<\/span> sr <span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>StreamReader<span class=\"token punctuation\">[<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span>endNode <span class=\"token builtin\">string<\/span><span class=\"token punctuation\">,<\/span> err <span class=\"token builtin\">error<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> isToolCall<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">toolCallChecker<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> sr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> err <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;&#034;<\/span><span class=\"token punctuation\">,<\/span> err<br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> isToolCall <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> nodeKeyTools<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> compose<span class=\"token punctuation\">.<\/span>END<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>graph<span class=\"token punctuation\">.<\/span><span class=\"token function\">AddBranch<\/span><span class=\"token punctuation\">(<\/span>nodeKeyModel<span class=\"token punctuation\">,<\/span><br \/>\n    compose<span class=\"token punctuation\">.<\/span><span class=\"token function\">NewStreamGraphBranch<\/span><span class=\"token punctuation\">(<\/span>modelPostBranchCondition<span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token keyword\">map<\/span><span class=\"token punctuation\">[<\/span><span class=\"token builtin\">string<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">bool<\/span><span class=\"token punctuation\">{<\/span>nodeKeyTools<span class=\"token punctuation\">:<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span> compose<span class=\"token punctuation\">.<\/span>END<span class=\"token punctuation\">:<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u5206\u652f\u51fd\u6570\u63a5\u6536 \u6d41\u5f0f \u7684 LLM \u8f93\u51fa&#xff08;StreamReader[*schema.Message]&#xff09;&#xff0c;\u9700\u8981\u5728\u6d41\u6ca1\u6709\u8bfb\u5b8c\u7684\u60c5\u51b5\u4e0b\u51b3\u5b9a\u8d70\u54ea\u6761\u8def\u3002<\/p>\n<hr \/>\n<h3>StreamToolCallChecker&#xff1a;\u6d41\u5f0f\u6a21\u5f0f\u7684\u96be\u70b9<\/h3>\n<p>\u975e\u6d41\u5f0f\u60c5\u51b5\u5f88\u7b80\u5355\u2014\u2014msg.ToolCalls \u6709\u6ca1\u6709\u5185\u5bb9\u4e00\u76ee\u4e86\u7136\u3002\u6d41\u5f0f\u60c5\u51b5\u4e0b&#xff0c;LLM \u8f93\u51fa\u662f\u9010 Token \u63a8\u8fdb\u7684&#xff0c;\u6846\u67b6\u5fc5\u987b\u5728\u4e0d\u80fd\u7b49\u5b8c\u6574\u8f93\u51fa\u7684\u524d\u63d0\u4e0b\u5224\u65ad&#034;\u8fd9\u6b21 LLM \u662f\u5728\u8c03\u5de5\u5177\u8fd8\u662f\u5728\u56de\u7b54\u95ee\u9898&#034;\u3002<\/p>\n<p>Eino \u9ed8\u8ba4\u7684\u5b9e\u73b0&#xff1a;<\/p>\n<p><span class=\"token keyword\">func<\/span> <span class=\"token function\">firstChunkStreamToolCallChecker<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">_<\/span> context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">,<\/span> sr <span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>StreamReader<span class=\"token punctuation\">[<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token builtin\">bool<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token builtin\">error<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">defer<\/span> sr<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        msg<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> sr<span class=\"token punctuation\">.<\/span><span class=\"token function\">Recv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> err <span class=\"token operator\">&#061;&#061;<\/span> io<span class=\"token punctuation\">.<\/span>EOF <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> err <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> err<br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token function\">len<\/span><span class=\"token punctuation\">(<\/span>msg<span class=\"token punctuation\">.<\/span>ToolCalls<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span>  <span class=\"token comment\">\/\/ \u7b2c\u4e00\u4e2a\u6709\u5185\u5bb9\u7684 chunk \u5305\u542b tool call \u2192 \u8d70\u5de5\u5177\u5206\u652f<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token function\">len<\/span><span class=\"token punctuation\">(<\/span>msg<span class=\"token punctuation\">.<\/span>Content<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">continue<\/span>  <span class=\"token comment\">\/\/ \u8df3\u8fc7\u7a7a chunk&#xff08;\u6d41\u5f00\u5934\u53ef\u80fd\u6709\u51e0\u4e2a\u7a7a chunk&#xff09;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span>  <span class=\"token comment\">\/\/ \u7b2c\u4e00\u4e2a\u6709\u5185\u5bb9\u7684 chunk \u662f\u6587\u672c \u2192 \u8d70 END<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5173\u952e\u9650\u5236&#xff1a;\u8c03\u7528\u8fd9\u4e2a checker \u4e4b\u540e&#xff0c;sr \u5c31\u88ab\u6d88\u8d39\u4e86&#xff08;\u5168\u90e8\u8bfb\u53d6\u5e76 Close&#xff09;\u3002\u8fd9\u610f\u5473\u7740&#xff1a;<\/p>\n<li>checker \u5fc5\u987b \u628a\u6574\u4e2a stream \u8bfb\u5b8c\u518d Close<\/li>\n<li>\u4e0d\u80fd\u628a\u8fd9\u4e2a stream \u518d\u8f6c\u53d1\u7ed9\u4e0b\u6e38\u2014\u2014\u5728\u5224\u65ad\u5b8c\u4e4b\u540e&#xff0c;Graph \u4f1a\u5728\u4e0b\u4e00\u8f6e\u91cd\u65b0\u62ff LLM \u7684\u8f93\u51fa<\/li>\n<p>\u4e3a\u4ec0\u4e48\u5bf9 Claude \u4e0d\u9002\u7528&#xff1a;OpenAI \u7684 tool call \u51fa\u73b0\u5728\u6d41\u7684\u7b2c\u4e00\u4e2a\u6709\u5185\u5bb9\u7684 chunk \u91cc&#xff08;ToolCalls \u5b57\u6bb5\u5148\u5230&#xff09;&#xff1b;Claude \u7684\u6d41\u5f0f\u8f93\u51fa\u91cc&#xff0c;\u6587\u672c\u5185\u5bb9\u548c tool call \u53ef\u80fd\u4ea4\u66ff\u51fa\u73b0&#xff0c;\u7b2c\u4e00\u4e2a chunk \u5f80\u5f80\u662f\u6587\u672c\u3002\u7528\u9ed8\u8ba4 checker \u5c31\u4f1a\u8bef\u5224\u4e3a&#034;\u76f4\u63a5\u56de\u7b54&#034;\u3002\u5982\u679c\u7528 Claude&#xff0c;\u9700\u8981\u81ea\u5df1\u5b9e\u73b0\u4e00\u4e2a\u6d88\u8d39\u5b8c\u6574\u4e2a\u6d41\u518d\u5224\u65ad\u7684 checker\u3002<\/p>\n<hr \/>\n<h3>\u5206\u652f 2&#xff1a;Tools \u540e\u5206\u652f &#043; ReturnDirectly<\/h3>\n<p>\u8fd9\u662f ReAct \u91cc\u6bd4\u8f83\u590d\u6742\u7684\u4e00\u6bb5\u903b\u8f91&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ Tools \u540e\u7684\u5206\u652f&#xff1a;\u51b3\u5b9a\u662f\u56de ChatModel \u8fd8\u662f ReturnDirectly<\/span><br \/>\ngraph<span class=\"token punctuation\">.<\/span><span class=\"token function\">AddBranch<\/span><span class=\"token punctuation\">(<\/span>nodeKeyTools<span class=\"token punctuation\">,<\/span> compose<span class=\"token punctuation\">.<\/span><span class=\"token function\">NewStreamGraphBranch<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>ctx context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">,<\/span> msgsStream <span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>StreamReader<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span>endNode <span class=\"token builtin\">string<\/span><span class=\"token punctuation\">,<\/span> err <span class=\"token builtin\">error<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        msgsStream<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">\/\/ \u4e0d\u9700\u8981\u8bfb\u5185\u5bb9&#xff0c;\u53ea\u770b State<\/span><\/p>\n<p>        err <span class=\"token operator\">&#061;<\/span> compose<span class=\"token punctuation\">.<\/span>ProcessState<span class=\"token punctuation\">[<\/span><span class=\"token operator\">*<\/span>state<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">_<\/span> context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">,<\/span> state <span class=\"token operator\">*<\/span>state<span class=\"token punctuation\">)<\/span> <span class=\"token builtin\">error<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token function\">len<\/span><span class=\"token punctuation\">(<\/span>state<span class=\"token punctuation\">.<\/span>ReturnDirectlyToolCallID<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                endNode <span class=\"token operator\">&#061;<\/span> nodeKeyDirectReturn<br \/>\n            <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                endNode <span class=\"token operator\">&#061;<\/span> nodeKeyModel  <span class=\"token comment\">\/\/ \u6b63\u5e38\u8def\u5f84&#xff1a;\u5de5\u5177\u7ed3\u679c\u56de LLM<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> endNode<span class=\"token punctuation\">,<\/span> err<br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token keyword\">map<\/span><span class=\"token punctuation\">[<\/span><span class=\"token builtin\">string<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">bool<\/span><span class=\"token punctuation\">{<\/span>nodeKeyModel<span class=\"token punctuation\">:<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span> nodeKeyDirectReturn<span class=\"token punctuation\">:<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u6ce8\u610f msgsStream.Close() \u7acb\u523b\u5c31\u88ab\u8c03\u7528\u4e86\u2014\u2014\u8fd9\u4e2a\u5206\u652f\u51fd\u6570\u53ea\u9700\u8981\u8bfb State \u91cc\u7684\u6807\u5fd7\u4f4d&#xff0c;\u4e0d\u9700\u8981\u5de5\u5177\u8f93\u51fa\u7684\u5185\u5bb9\u3002<\/p>\n<h4>ReturnDirectly Lambda \u8282\u70b9<\/h4>\n<p><span class=\"token comment\">\/\/ \u4ece\u6240\u6709\u5de5\u5177\u7ed3\u679c\u91cc&#xff0c;\u627e\u5230\u90a3\u4e2a\u9700\u8981\u76f4\u63a5\u8fd4\u56de\u7684\u5de5\u5177\u7ed3\u679c<\/span><br \/>\ndirectReturn <span class=\"token operator\">:&#061;<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>ctx context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">,<\/span> msgs <span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>StreamReader<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>StreamReader<span class=\"token punctuation\">[<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token builtin\">error<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> schema<span class=\"token punctuation\">.<\/span><span class=\"token function\">StreamReaderWithConvert<\/span><span class=\"token punctuation\">(<\/span>msgs<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>msgs <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">,<\/span> <span class=\"token builtin\">error<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">var<\/span> msg <span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<br \/>\n        compose<span class=\"token punctuation\">.<\/span>ProcessState<span class=\"token punctuation\">[<\/span><span class=\"token operator\">*<\/span>state<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">_<\/span> context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">,<\/span> state <span class=\"token operator\">*<\/span>state<span class=\"token punctuation\">)<\/span> <span class=\"token builtin\">error<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">for<\/span> i <span class=\"token operator\">:&#061;<\/span> <span class=\"token keyword\">range<\/span> msgs <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> msgs<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token operator\">&amp;&amp;<\/span> msgs<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>ToolCallID <span class=\"token operator\">&#061;&#061;<\/span> state<span class=\"token punctuation\">.<\/span>ReturnDirectlyToolCallID <span class=\"token punctuation\">{<\/span><br \/>\n                    msg <span class=\"token operator\">&#061;<\/span> msgs<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><br \/>\n                    <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> msg <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">nil<\/span><span class=\"token punctuation\">,<\/span> schema<span class=\"token punctuation\">.<\/span>ErrNoValue  <span class=\"token comment\">\/\/ \u8fc7\u6ee4\u6389\u4e0d\u9700\u8981\u76f4\u63a5\u8fd4\u56de\u7684\u5de5\u5177\u7ed3\u679c<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> msg<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>ErrNoValue&#xff08;E47 \u8bb2\u8fc7\u7684\u6d41\u8fc7\u6ee4\u54e8\u5175&#xff09;\u5728\u8fd9\u91cc\u6d3e\u4e0a\u4e86\u7528\u573a&#xff1a;\u5f53\u5de5\u5177\u7ed3\u679c\u5217\u8868\u91cc\u6ca1\u6709\u5339\u914d\u7684 ToolCallID&#xff0c;\u8fd4\u56de ErrNoValue \u5c31\u81ea\u52a8\u8df3\u8fc7\u8fd9\u6761&#xff0c;\u4e0d\u4f1a\u9519\u8bef\u8f93\u51fa\u3002<\/p>\n<h4>\u4e24\u79cd\u89e6\u53d1 ReturnDirectly \u7684\u65b9\u5f0f<\/h4>\n<li>\u914d\u7f6e\u7ea7&#xff1a;AgentConfig.ToolReturnDirectly &#061; map[string]struct{}{&#034;final_answer_tool&#034;: {}}\u2014\u2014\u67d0\u4e2a\u5de5\u5177\u4e00\u65e6\u88ab\u8c03\u7528&#xff0c;\u5c31\u76f4\u63a5\u8fd4\u56de\u7ed3\u679c<\/li>\n<li>\u8fd0\u884c\u65f6&#xff1a;\u5de5\u5177\u5185\u90e8\u8c03\u7528 react.SetReturnDirectly(ctx)<\/li>\n<p><span class=\"token keyword\">func<\/span> <span class=\"token function\">SetReturnDirectly<\/span><span class=\"token punctuation\">(<\/span>ctx context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">)<\/span> <span class=\"token builtin\">error<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> compose<span class=\"token punctuation\">.<\/span><span class=\"token function\">ProcessState<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>ctx context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">,<\/span> s <span class=\"token operator\">*<\/span>state<span class=\"token punctuation\">)<\/span> <span class=\"token builtin\">error<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        s<span class=\"token punctuation\">.<\/span>ReturnDirectlyToolCallID <span class=\"token operator\">&#061;<\/span> compose<span class=\"token punctuation\">.<\/span><span class=\"token function\">GetToolCallID<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">\/\/ \u4ece ctx \u53d6\u5f53\u524d\u5de5\u5177\u7684 CallID<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u8ba9\u5de5\u5177\u672c\u8eab\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u6267\u884c\u7ed3\u679c\u51b3\u5b9a&#034;\u8fd9\u6b21\u8981\u76f4\u63a5\u8fd4\u56de&#034;&#xff0c;\u66f4\u7075\u6d3b\u3002<\/p>\n<hr \/>\n<h3>toolResultCollectorMiddleware&#xff1a;\u5de5\u5177\u7ed3\u679c\u7684\u4fa7\u8def\u53d1\u9001<\/h3>\n<p><span class=\"token keyword\">func<\/span> <span class=\"token function\">newToolResultCollectorMiddleware<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> compose<span class=\"token punctuation\">.<\/span>ToolMiddleware <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> compose<span class=\"token punctuation\">.<\/span>ToolMiddleware<span class=\"token punctuation\">{<\/span><br \/>\n        Invokable<span class=\"token punctuation\">:<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>next compose<span class=\"token punctuation\">.<\/span>InvokableToolEndpoint<span class=\"token punctuation\">)<\/span> compose<span class=\"token punctuation\">.<\/span>InvokableToolEndpoint <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>ctx context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">,<\/span> input <span class=\"token operator\">*<\/span>compose<span class=\"token punctuation\">.<\/span>ToolInput<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>compose<span class=\"token punctuation\">.<\/span>ToolOutput<span class=\"token punctuation\">,<\/span> <span class=\"token builtin\">error<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                senders <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">getToolResultSendersFromCtx<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">)<\/span><br \/>\n                output<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> input<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">\/\/ \u5148\u6267\u884c\u539f\u59cb\u5de5\u5177<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> err <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">nil<\/span><span class=\"token punctuation\">,<\/span> err<br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> senders <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token operator\">&amp;&amp;<\/span> senders<span class=\"token punctuation\">.<\/span>sender <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    senders<span class=\"token punctuation\">.<\/span><span class=\"token function\">sender<\/span><span class=\"token punctuation\">(<\/span>input<span class=\"token punctuation\">.<\/span>Name<span class=\"token punctuation\">,<\/span> input<span class=\"token punctuation\">.<\/span>CallID<span class=\"token punctuation\">,<\/span> output<span class=\"token punctuation\">.<\/span>Result<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">\/\/ \u4fa7\u8def\u53d1\u9001<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> output<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token comment\">\/\/ Streamable \/ Enhanced \u7248\u672c\u7c7b\u4f3c&#xff0c;\u6d41\u5f0f\u7684\u8bdd\u5148 Copy(2)<\/span><br \/>\n        Streamable<span class=\"token punctuation\">:<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>next compose<span class=\"token punctuation\">.<\/span>StreamableToolEndpoint<span class=\"token punctuation\">)<\/span> compose<span class=\"token punctuation\">.<\/span>StreamableToolEndpoint <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>ctx context<span class=\"token punctuation\">.<\/span>Context<span class=\"token punctuation\">,<\/span> input <span class=\"token operator\">*<\/span>compose<span class=\"token punctuation\">.<\/span>ToolInput<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>compose<span class=\"token punctuation\">.<\/span>StreamToolOutput<span class=\"token punctuation\">,<\/span> <span class=\"token builtin\">error<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                senders <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">getToolResultSendersFromCtx<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">)<\/span><br \/>\n                output<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> input<span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> err <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">nil<\/span><span class=\"token punctuation\">,<\/span> err<br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> senders <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token operator\">&amp;&amp;<\/span> senders<span class=\"token punctuation\">.<\/span>streamSender <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    streams <span class=\"token operator\">:&#061;<\/span> output<span class=\"token punctuation\">.<\/span>Result<span class=\"token punctuation\">.<\/span><span class=\"token function\">Copy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">\/\/ fan-out&#xff1a;\u4e00\u4efd\u7ed9 sender&#xff0c;\u4e00\u4efd\u7ee7\u7eed<\/span><br \/>\n                    senders<span class=\"token punctuation\">.<\/span><span class=\"token function\">streamSender<\/span><span class=\"token punctuation\">(<\/span>input<span class=\"token punctuation\">.<\/span>Name<span class=\"token punctuation\">,<\/span> input<span class=\"token punctuation\">.<\/span>CallID<span class=\"token punctuation\">,<\/span> streams<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                    output<span class=\"token punctuation\">.<\/span>Result <span class=\"token operator\">&#061;<\/span> streams<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> output<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u4e2a\u4e2d\u95f4\u4ef6\u81ea\u52a8\u88ab\u585e\u5728\u6240\u6709\u5de5\u5177\u7684\u6700\u524d\u9762&#xff1a;<\/p>\n<p>config<span class=\"token punctuation\">.<\/span>ToolsConfig<span class=\"token punctuation\">.<\/span>ToolCallMiddlewares <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">append<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span>compose<span class=\"token punctuation\">.<\/span>ToolMiddleware<span class=\"token punctuation\">{<\/span><span class=\"token function\">newToolResultCollectorMiddleware<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    config<span class=\"token punctuation\">.<\/span>ToolsConfig<span class=\"token punctuation\">.<\/span>ToolCallMiddlewares<span class=\"token operator\">&#8230;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>getToolResultSendersFromCtx(ctx) \u4ece context \u91cc\u53d6 sender\u2014\u2014\u8c03\u7528\u65b9\u53ef\u4ee5\u5728 ctx \u91cc\u6ce8\u5165 sender&#xff0c;\u8fd9\u6837\u5de5\u5177\u7ed3\u679c\u5c31\u80fd\u5b9e\u65f6\u63a8\u9001\u5230 SSE \u6d41&#xff08;DeepFlux \u5c31\u662f\u8fd9\u4e48\u505a\u7684&#xff1a;\u5de5\u5177\u6267\u884c\u65f6\u5b9e\u65f6\u63a8\u9001\u8fdb\u5ea6\u7ed9\u524d\u7aef&#xff0c;\u4e0d\u7528\u7b49\u6240\u6709\u5de5\u5177\u8dd1\u5b8c&#xff09;\u3002<\/p>\n<p>\u6d41\u5f0f\u5de5\u5177\u7684 Copy(2) \u6b63\u662f E47 \u8bb2\u8fc7\u7684 fan-out&#xff1a;\u4e00\u4efd\u63a8\u7ed9 sender&#xff0c;\u4e00\u4efd\u7ee7\u7eed\u8d70 Graph \u6b63\u5e38\u6d41\u7a0b\u3002<\/p>\n<hr \/>\n<h3>NewAgent \u7ec4\u88c5\u5168\u6d41\u7a0b<\/h3>\n<p>NewAgent(ctx, config)<br \/>\n    \u2502<br \/>\n    \u251c\u2500 genToolInfos      \u2192 \u6536\u96c6\u6240\u6709\u5de5\u5177\u7684 ToolInfo&#xff08;\u540d\u5b57\u3001\u63cf\u8ff0\u3001schema&#xff09;<br \/>\n    \u251c\u2500 ChatModelWithTools \u2192 \u628a\u5de5\u5177 schema \u6ce8\u5165 LLM \u914d\u7f6e<br \/>\n    \u251c\u2500 NewToolNode        \u2192 \u521b\u5efa ToolsNode<br \/>\n    \u2502<br \/>\n    \u251c\u2500 compose.NewGraph   \u2192 \u5e26 State \u7684 Graph&#xff08;state &#061; \u6d88\u606f\u5386\u53f2&#xff09;<br \/>\n    \u251c\u2500 AddChatModelNode   \u2192 \u542b modelPreHandle&#xff08;\u7d2f\u79ef\u6d88\u606f\u5386\u53f2&#xff09;<br \/>\n    \u251c\u2500 AddEdge(START, chat)<br \/>\n    \u251c\u2500 AddToolsNode       \u2192 \u542b toolsNodePreHandle&#xff08;\u8bb0\u5f55\u5de5\u5177\u8c03\u7528\u6d88\u606f&#xff09;<br \/>\n    \u251c\u2500 AddBranch(chat, &#8230;)\u2192 StreamToolCallChecker \u51b3\u5b9a tools or END<br \/>\n    \u251c\u2500 buildReturnDirectly<br \/>\n    \u2502       \u251c\u2500 AddLambdaNode(&#034;direct_return&#034;, &#8230;)  \u2192 \u8fc7\u6ee4\u51fa\u9700\u8981\u76f4\u63a5\u8fd4\u56de\u7684\u5de5\u5177\u7ed3\u679c<br \/>\n    \u2502       \u251c\u2500 AddBranch(tools, &#8230;)                \u2192 \u770b State \u51b3\u5b9a chatModel or direct_return<br \/>\n    \u2502       \u2514\u2500 AddEdge(direct_return, END)<br \/>\n    \u2502<br \/>\n    \u2514\u2500 graph.Compile(ctx,<br \/>\n           WithMaxRunSteps(config.MaxStep),<br \/>\n           WithNodeTriggerMode(AnyPredecessor),  \u2190 Pregel \u6a21\u5f0f&#xff08;\u6709\u73af&#xff09;<br \/>\n           WithGraphName(graphName))<\/p>\n<p>AnyPredecessor \u662f Pregel \u6a21\u5f0f&#xff08;E48 \u91cc\u8bb2\u8fc7&#xff09;&#xff0c;\u8fd9\u91cc\u663e\u5f0f\u58f0\u660e\u4e86\u2014\u2014ReAct \u7684\u5faa\u73af\u8fb9&#xff08;tools \u2192 chat&#xff09;\u5fc5\u987b\u7528 Pregel&#xff0c;DAG \u4f1a\u56e0\u4e3a\u6709\u73af\u800c\u62a5\u9519\u3002<\/p>\n<hr \/>\n<h3>\u6700\u7ec8 Graph \u7ed3\u6784\u56fe<\/h3>\n<p>               \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n               \u2502              Pregel Graph                 \u2502<br \/>\n               \u2502                                           \u2502<br \/>\n    START  \u2500\u2500\u25ba \u2502 ChatModel \u2500\u2500\u25ba [branch]                   \u2502<br \/>\n               \u2502                    \u2502 tool calls           \u2502<br \/>\n               \u2502                    \u25bc                      \u2502<br \/>\n               \u2502               ToolsNode \u2500\u2500\u25ba [branch]     \u2502<br \/>\n               \u2502                                \u2502 ReturnDirectly<br \/>\n               \u2502                                \u25bc          \u2502<br \/>\n               \u2502                          direct_return \u2500\u2500\u25ba\u2502 END<br \/>\n               \u2502                \u2502 normal                   \u2502<br \/>\n               \u2502                \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u25ba ChatModel \u2502<br \/>\n               \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<br \/>\n                                                      \u25b2<br \/>\n                                                    cycle<\/p>\n<hr \/>\n<h3>\u5b8c\u6574\u8c03\u7528\u793a\u4f8b<\/h3>\n<p>agent<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> react<span class=\"token punctuation\">.<\/span><span class=\"token function\">NewAgent<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>react<span class=\"token punctuation\">.<\/span>AgentConfig<span class=\"token punctuation\">{<\/span><br \/>\n    ToolCallingModel<span class=\"token punctuation\">:<\/span> llm<span class=\"token punctuation\">,<\/span><br \/>\n    ToolsConfig<span class=\"token punctuation\">:<\/span> compose<span class=\"token punctuation\">.<\/span>ToolsNodeConfig<span class=\"token punctuation\">{<\/span><br \/>\n        Tools<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span>tool<span class=\"token punctuation\">.<\/span>BaseTool<span class=\"token punctuation\">{<\/span>searchTool<span class=\"token punctuation\">,<\/span> calcTool<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    MessageModifier<span class=\"token punctuation\">:<\/span> react<span class=\"token punctuation\">.<\/span><span class=\"token function\">NewPersonaModifier<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;You are a helpful assistant.&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    MaxStep<span class=\"token punctuation\">:<\/span>         <span class=\"token number\">20<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    ToolReturnDirectly<span class=\"token punctuation\">:<\/span> <span class=\"token keyword\">map<\/span><span class=\"token punctuation\">[<\/span><span class=\"token builtin\">string<\/span><span class=\"token punctuation\">]<\/span><span class=\"token keyword\">struct<\/span><span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token string\">&#034;final_answer&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token comment\">\/\/ \u8fd9\u4e2a\u5de5\u5177\u88ab\u8c03\u7528\u540e\u76f4\u63a5\u8fd4\u56de&#xff0c;\u4e0d\u518d\u8fdb LLM<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u975e\u6d41\u5f0f<\/span><br \/>\nmsg<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> agent<span class=\"token punctuation\">.<\/span><span class=\"token function\">Generate<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">{<\/span><br \/>\n    schema<span class=\"token punctuation\">.<\/span><span class=\"token function\">UserMessage<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5e2e\u6211\u641c\u7d22\u4e00\u4e0b Eino \u7684 GitHub star \u6570&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u6d41\u5f0f<\/span><br \/>\nstream<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> agent<span class=\"token punctuation\">.<\/span><span class=\"token function\">Stream<\/span><span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">*<\/span>schema<span class=\"token punctuation\">.<\/span>Message<span class=\"token punctuation\">{<\/span><br \/>\n    schema<span class=\"token punctuation\">.<\/span><span class=\"token function\">UserMessage<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;&#8230;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    chunk<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> stream<span class=\"token punctuation\">.<\/span><span class=\"token function\">Recv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span 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