支持多轮工具调用

src/core/agent.ts

@@ -1,6 +1,6 @@
 import { createAnthropic } from '@ai-sdk/anthropic';
 import { createDeepSeek } from '@ai-sdk/deepseek';
-import { generateText, streamText, type ModelMessage, type Tool as AITool, type LanguageModel } from 'ai';
+import { generateText, streamText, stepCountIs, type ModelMessage, type Tool as AITool, type LanguageModel } from 'ai';
 import type { Tool, ToolResult, Message, AgentConfig, ProviderType } from '../types/index.js';
 import { buildZodSchema } from '../types/index.js';
 
@@ -82,6 +82,7 @@ export class Agent {
         messages: this.conversationHistory,
         tools: vercelTools,
         maxOutputTokens: this.config.maxTokens,
+        stopWhen: stepCountIs(10), // 允许最多 10 轮工具调用
         onChunk: ({ chunk }) => {
           if (chunk.type === 'tool-call') {
             onStream(`\n[调用工具: ${chunk.toolName}]\n`);
@@ -114,6 +115,7 @@ export class Agent {
         messages: this.conversationHistory,
         tools: vercelTools,
         maxOutputTokens: this.config.maxTokens,
+        stopWhen: stepCountIs(10), // 允许最多 10 轮工具调用
       });
 
       fullResponse = result.text;