fix: step-retry-error (#6829)

* step-retry-error

* error output

* doc

* lock

---------

Co-authored-by: archer <545436317@qq.com>

document/content/self-host/upgrading/4-15/4150.mdx

@@ -15,9 +15,10 @@ description: 'FastGPT V4.15.0 更新说明'
 
 ## 🐛 修复
 
+1. 修复 Agent v2 模式下，模型响应报错会导致 step 重复执行
 
 ## 代码优化
 
 1. 重新调整代码结构，升级 nextjs 最新版，切换至 turbopack 构建，提高构建速度；升级容器默认 node 至 24。
 2. 优化 Agent tool 声明和运行，统一所有 tool 的声明和运行方式。
-3. 文件上传内容从 system prompt 中放到 user message 中，提高 cache 命中率
\ No newline at end of file
+3. 文件上传内容从 system prompt 中放到 user message 中，提高 cache 命中率

document/data/doc-last-modified.json

@@ -251,7 +251,7 @@
   "content/self-host/upgrading/4-14/41481.mdx": "2026-04-26T21:08:47+08:00",
   "content/self-host/upgrading/4-14/4149.en.mdx": "2026-04-26T21:08:47+08:00",
   "content/self-host/upgrading/4-14/4149.mdx": "2026-04-26T21:08:47+08:00",
-  "content/self-host/upgrading/4-15/4150.mdx": "2026-04-24T13:02:20+08:00",
+  "content/self-host/upgrading/4-15/4150.mdx": "2026-04-28T13:31:00+08:00",
   "content/self-host/upgrading/outdated/40.en.mdx": "2026-04-26T21:08:47+08:00",
   "content/self-host/upgrading/outdated/40.mdx": "2026-04-26T21:08:47+08:00",
   "content/self-host/upgrading/outdated/41.en.mdx": "2026-04-26T21:08:47+08:00",

document/package.json

@@ -47,6 +47,7 @@
     "postcss": "^8.5.10",
     "tailwindcss": "^4.1.11",
     "typescript": "^5.8.3",
+    "zhlint": "^0.8.2",
     "zod": "^4.0.5"
   }
 }

packages/service/core/workflow/dispatch/ai/agent/index.ts

@@ -3,6 +3,7 @@ import {
   DispatchNodeResponseKeyEnum,
   SseResponseEventEnum
 } from '@fastgpt/global/core/workflow/runtime/constants';
+import { textAdaptGptResponse } from '@fastgpt/global/core/workflow/runtime/utils';
 import type {
   DispatchNodeResultType,
   ModuleDispatchProps
@@ -45,6 +46,7 @@ import type { AppFormEditFormType } from '@fastgpt/global/core/app/formEdit/type
 import { getLogger, LogCategories } from '../../../../../common/logger';
 import { env } from '../../../../../env';
 import { dispatchPiAgent } from './piAgent';
+import { i18nT } from '../../../../../../web/i18n/utils';
 
 export type DispatchAgentModuleProps = ModuleDispatchProps<{
   [NodeInputKeyEnum.history]?: ChatItemMiniType[];
@@ -477,8 +479,50 @@ export const dispatchRunAgent = async (props: DispatchAgentModuleProps): Promise
               filesMap,
               capabilityToolCallHandler
             });
+            const stepCallErrorText =
+              result.nodeResponse.errorText?.trim() ||
+              (result.nodeResponse.finishReason === 'error'
+                ? i18nT('chat:completion_finish_error')
+                : '');
+
             nodeResponses.push(result.nodeResponse);
 
+            if (stepCallErrorText) {
+              assistantResponses.push({
+                text: { content: stepCallErrorText },
+                planId: agentPlan.planId,
+                stepId: step.id
+              });
+              workflowStreamResponse?.({
+                stepId: step.id,
+                event: SseResponseEventEnum.answer,
+                data: textAdaptGptResponse({ text: stepCallErrorText })
+              });
+
+              const answerText = assistantResponses
+                .filter((item) => item.text?.content)
+                .map((item) => item.text!.content)
+                .join('');
+
+              return {
+                data: {
+                  [NodeOutputKeyEnum.answerText]: answerText
+                },
+                error: {
+                  [NodeOutputKeyEnum.errorText]: stepCallErrorText
+                },
+                [DispatchNodeResponseKeyEnum.memories]: {
+                  [masterMessagesKey]: undefined,
+                  [agentPlanKey]: undefined,
+                  [planMessagesKey]: undefined,
+                  [planBufferKey]: undefined
+                },
+                [DispatchNodeResponseKeyEnum.assistantResponses]: assistantResponses,
+                [DispatchNodeResponseKeyEnum.nodeResponses]: nodeResponses,
+                [DispatchNodeResponseKeyEnum.toolResponses]: stepCallErrorText
+              };
+            }
+
             // Merge response
             const assistantResponse = GPTMessages2Chats({
               messages: result.assistantMessages,