Feature/seq agents (#2798)

* update build functions

* sequential agents

* update langchain to 0.2, added sequential agent nodes

* add marketplace templates

* update howto wordings

* Merge branch 'main' into feature/Seq-Agents

# Conflicts:
#	pnpm-lock.yaml

* update deprecated functions and add new sequential nodes

* add marketplace templates

* update marketplace templates, add structured output to llm node

* add multi agents template

* update llm node with bindmodels

* update cypress version

* update templates sticky note wordings

* update tool node to include human in loop action

* update structured outputs error from models

* update cohere package to resolve google genai pipeThrough bug

* update mistral package version, added message reconstruction before invoke seq agent

* add HITL to agent

* update state messages restructuring

* update load and split methods for s3 directory

packages/components/src/Interface.ts

@@ -20,6 +20,7 @@ export type NodeParamsType =
     | 'date'
     | 'file'
     | 'folder'
+    | 'tabs'
 
 export type CommonType = string | number | boolean | undefined | null
 
@@ -63,6 +64,8 @@ export interface INodeOutputsValue {
     name: string
     baseClasses: string[]
     description?: string
+    hidden?: boolean
+    isAnchor?: boolean
 }
 
 export interface INodeParams {
@@ -85,7 +88,11 @@ export interface INodeParams {
     additionalParams?: boolean
     loadMethod?: string
     hidden?: boolean
-    variables?: ICommonObject[]
+    hideCodeExecute?: boolean
+    codeExample?: string
+    hint?: Record<string, string>
+    tabIdentifier?: string
+    tabs?: Array<INodeParams>
 }
 
 export interface INodeExecutionData {
@@ -109,6 +116,7 @@ export interface INodeProperties {
     filePath?: string
     badge?: string
     deprecateMessage?: string
+    hideOutput?: boolean
 }
 
 export interface INode extends INodeProperties {
@@ -151,6 +159,7 @@ export interface IUsedTool {
     tool: string
     toolInput: object
     toolOutput: string | object
+    sourceDocuments?: ICommonObject[]
 }
 
 export interface IMultiAgentNode {
@@ -166,6 +175,27 @@ export interface IMultiAgentNode {
     recursionLimit?: number
     moderations?: Moderation[]
     multiModalMessageContent?: MessageContentImageUrl[]
+    checkpointMemory?: any
+}
+
+type SeqAgentType = 'agent' | 'condition' | 'end' | 'start' | 'tool' | 'state' | 'llm'
+
+export interface ISeqAgentNode {
+    id: string
+    node: any
+    name: string
+    label: string
+    type: SeqAgentType
+    output: string
+    llm?: any
+    startLLM?: any
+    predecessorAgents?: ISeqAgentNode[]
+    recursionLimit?: number
+    moderations?: Moderation[]
+    multiModalMessageContent?: MessageContentImageUrl[]
+    checkpointMemory?: any
+    agentInterruptToolNode?: any
+    agentInterruptToolFunc?: any
 }
 
 export interface ITeamState {
@@ -176,13 +206,31 @@ export interface ITeamState {
     team_members: string[]
     next: string
     instructions: string
+    summarization: string
+}
+
+export interface ISeqAgentsState {
+    messages: {
+        value: (x: BaseMessage[], y: BaseMessage[]) => BaseMessage[]
+        default: () => BaseMessage[]
+    }
 }
 
 export interface IAgentReasoning {
     agentName: string
     messages: string[]
-    next: string
-    instructions: string
+    next?: string
+    instructions?: string
+    usedTools?: IUsedTool[]
+    sourceDocuments?: ICommonObject[]
+    state?: ICommonObject
+    nodeName?: string
+}
+
+export interface IAction {
+    id?: string
+    elements?: Array<{ type: string; label: string }>
+    mapping?: { approve: string; reject: string; toolCalls: any[] }
 }
 
 export interface IFileUpload {

packages/components/src/agents.ts

@@ -11,6 +11,7 @@ import { Runnable, RunnableSequence, RunnablePassthrough } from '@langchain/core
 import { Serializable } from '@langchain/core/load/serializable'
 import { renderTemplate } from '@langchain/core/prompts'
 import { ChatGeneration } from '@langchain/core/outputs'
+import { Document } from '@langchain/core/documents'
 import { BaseChain, SerializedLLMChain } from 'langchain/chains'
 import {
     CreateReactAgentParams,
@@ -421,7 +422,8 @@ export class AgentExecutor extends BaseChain<ChainValues, AgentExecutorOutput> {
                                 {
                                     sessionId: this.sessionId,
                                     chatId: this.chatId,
-                                    input: this.input
+                                    input: this.input,
+                                    state: inputs
                                 }
                             )
                             usedTools.push({
@@ -556,7 +558,8 @@ export class AgentExecutor extends BaseChain<ChainValues, AgentExecutorOutput> {
                         {
                             sessionId: this.sessionId,
                             chatId: this.chatId,
-                            input: this.input
+                            input: this.input,
+                            state: inputs
                         }
                     )
                     if (typeof observation === 'string' && observation.includes(SOURCE_DOCUMENTS_PREFIX)) {

packages/components/src/utils.ts

@@ -208,20 +208,22 @@ export const getNodeModulesPackagePath = (packageName: string): string => {
  */
 export const getInputVariables = (paramValue: string): string[] => {
     if (typeof paramValue !== 'string') return []
-    let returnVal = paramValue
+    const returnVal = paramValue
     const variableStack = []
     const inputVariables = []
     let startIdx = 0
     const endIdx = returnVal.length
-
     while (startIdx < endIdx) {
         const substr = returnVal.substring(startIdx, startIdx + 1)
-
+        // Check for escaped curly brackets
+        if (substr === '\\' && (returnVal[startIdx + 1] === '{' || returnVal[startIdx + 1] === '}')) {
+            startIdx += 2 // Skip the escaped bracket
+            continue
+        }
         // Store the opening double curly bracket
         if (substr === '{') {
             variableStack.push({ substr, startIdx: startIdx + 1 })
         }
-
         // Found the complete variable
         if (substr === '}' && variableStack.length > 0 && variableStack[variableStack.length - 1].substr === '{') {
             const variableStartIdx = variableStack[variableStack.length - 1].startIdx
@@ -729,7 +731,7 @@ export const getVars = async (appDataSource: DataSource, databaseEntities: IData
     const variables = ((await appDataSource.getRepository(databaseEntities['Variable']).find()) as IVariable[]) ?? []
 
     // override variables defined in overrideConfig
-    // nodeData.inputs.variables is an Object, check each property and override the variable
+    // nodeData.inputs.vars is an Object, check each property and override the variable
     if (nodeData?.inputs?.vars) {
         for (const propertyName of Object.getOwnPropertyNames(nodeData.inputs.vars)) {
             const foundVar = variables.find((v) => v.name === propertyName)