Bugfix/Anthropic messages in agentflow (#3801)

fix anthropic messages in agentflow

packages/components/nodes/agents/ToolAgent/ToolAgent.ts

@@ -7,7 +7,7 @@ import { BaseChatModel } from '@langchain/core/language_models/chat_models'
 import { ChatPromptTemplate, MessagesPlaceholder, HumanMessagePromptTemplate, PromptTemplate } from '@langchain/core/prompts'
 import { formatToOpenAIToolMessages } from 'langchain/agents/format_scratchpad/openai_tools'
 import { type ToolsAgentStep } from 'langchain/agents/openai/output_parser'
-import { getBaseClasses, handleEscapeCharacters, removeInvalidImageMarkdown } from '../../../src/utils'
+import { extractOutputFromArray, getBaseClasses, handleEscapeCharacters, removeInvalidImageMarkdown } from '../../../src/utils'
 import {
     FlowiseMemory,
     ICommonObject,
@@ -181,12 +181,7 @@ class ToolAgent_Agents implements INode {
         }
 
         let output = res?.output
-        if (Array.isArray(output)) {
+        output = extractOutputFromArray(res?.output)
-            output = output[0]?.text || ''
-        } else if (typeof output === 'object') {
-            output = output?.text || ''
-        }
-
         output = removeInvalidImageMarkdown(output)
 
         // Claude 3 Opus tends to spit out <thinking>..</thinking> as well, discard that in final output

packages/components/nodes/sequentialagents/Agent/Agent.ts

@@ -23,7 +23,14 @@ import {
     ConversationHistorySelection
 } from '../../../src/Interface'
 import { ToolCallingAgentOutputParser, AgentExecutor, SOURCE_DOCUMENTS_PREFIX, ARTIFACTS_PREFIX } from '../../../src/agents'
-import { getInputVariables, getVars, handleEscapeCharacters, prepareSandboxVars, removeInvalidImageMarkdown } from '../../../src/utils'
+import {
+    extractOutputFromArray,
+    getInputVariables,
+    getVars,
+    handleEscapeCharacters,
+    prepareSandboxVars,
+    removeInvalidImageMarkdown
+} from '../../../src/utils'
 import {
     customGet,
     getVM,
@@ -827,6 +834,7 @@ async function agentNode(
         }
 
         let outputContent = typeof result === 'string' ? result : result.content || result.output
+        outputContent = extractOutputFromArray(outputContent)
         outputContent = removeInvalidImageMarkdown(outputContent)
 
         if (nodeData.inputs?.updateStateMemoryUI || nodeData.inputs?.updateStateMemoryCode) {

packages/components/nodes/sequentialagents/LLMNode/LLMNode.ts

@@ -18,7 +18,7 @@ import {
     ConversationHistorySelection
 } from '../../../src/Interface'
 import { AgentExecutor } from '../../../src/agents'
-import { getInputVariables, getVars, handleEscapeCharacters, prepareSandboxVars } from '../../../src/utils'
+import { extractOutputFromArray, getInputVariables, getVars, handleEscapeCharacters, prepareSandboxVars } from '../../../src/utils'
 import {
     ExtractTool,
     convertStructuredSchemaToZod,
@@ -607,6 +607,8 @@ async function agentNode(
             } else {
                 result.name = name
                 result.additional_kwargs = { ...result.additional_kwargs, nodeId: nodeData.id }
+                let outputContent = typeof result === 'string' ? result : result.content
+                result.content = extractOutputFromArray(outputContent)
                 return {
                     ...returnedOutput,
                     messages: [result]
@@ -627,6 +629,8 @@ async function agentNode(
             } else {
                 result.name = name
                 result.additional_kwargs = { ...result.additional_kwargs, nodeId: nodeData.id }
+                let outputContent = typeof result === 'string' ? result : result.content
+                result.content = extractOutputFromArray(outputContent)
                 return {
                     messages: [result]
                 }

packages/components/src/utils.ts

@@ -1001,6 +1001,21 @@ export const removeInvalidImageMarkdown = (output: string): string => {
     return typeof output === 'string' ? output.replace(/!\[.*?\]\((?!https?:\/\/).*?\)/g, '') : output
 }
 
+/**
+ * Extract output from array
+ * @param {any} output
+ * @returns {string}
+ */
+export const extractOutputFromArray = (output: any): string => {
+    if (Array.isArray(output)) {
+        return output.map((o) => o.text).join('\n')
+    } else if (typeof output === 'object') {
+        if (output.text) return output.text
+        else return JSON.stringify(output)
+    }
+    return output
+}
+
 /**
  * Loop through the object and replace the key with the value
  * @param {any} obj