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/nodes/sequentialagents/Start/Start.ts

@@ -0,0 +1,81 @@
+import { START } from '@langchain/langgraph'
+import { BaseChatModel } from '@langchain/core/language_models/chat_models'
+import { INode, INodeData, INodeParams, ISeqAgentNode } from '../../../src/Interface'
+import { Moderation } from '../../moderation/Moderation'
+
+class Start_SeqAgents implements INode {
+    label: string
+    name: string
+    version: number
+    description: string
+    type: string
+    icon: string
+    category: string
+    baseClasses: string[]
+    credential: INodeParams
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'Start'
+        this.name = 'seqStart'
+        this.version = 1.0
+        this.type = 'Start'
+        this.icon = 'start.svg'
+        this.category = 'Sequential Agents'
+        this.description = 'Starting point of the conversation'
+        this.baseClasses = [this.type]
+        this.inputs = [
+            {
+                label: 'Chat Model',
+                name: 'model',
+                type: 'BaseChatModel',
+                description: `Only compatible with models that are capable of function calling: ChatOpenAI, ChatMistral, ChatAnthropic, ChatGoogleGenerativeAI, ChatVertexAI, GroqChat`
+            },
+            {
+                label: 'Agent Memory',
+                name: 'agentMemory',
+                type: 'BaseCheckpointSaver',
+                description: 'Save the state of the agent',
+                optional: true
+            },
+            {
+                label: 'State',
+                name: 'state',
+                type: 'State',
+                description:
+                    'State is an object that is updated by nodes in the graph, passing from one node to another. By default, state contains "messages" that got updated with each message sent and received.',
+                optional: true
+            },
+            {
+                label: 'Input Moderation',
+                description: 'Detect text that could generate harmful output and prevent it from being sent to the language model',
+                name: 'inputModeration',
+                type: 'Moderation',
+                optional: true,
+                list: true
+            }
+        ]
+    }
+
+    async init(nodeData: INodeData): Promise<any> {
+        const moderations = (nodeData.inputs?.inputModeration as Moderation[]) ?? []
+        const model = nodeData.inputs?.model as BaseChatModel
+
+        const returnOutput: ISeqAgentNode = {
+            id: nodeData.id,
+            node: START,
+            name: START,
+            label: START,
+            type: 'start',
+            output: START,
+            llm: model,
+            startLLM: model,
+            moderations,
+            checkpointMemory: nodeData.inputs?.agentMemory
+        }
+
+        return returnOutput
+    }
+}
+
+module.exports = { nodeClass: Start_SeqAgents }

packages/components/nodes/sequentialagents/Start/start.svg

@@ -0,0 +1 @@
+<svg  xmlns="http://www.w3.org/2000/svg"  width="24"  height="24"  viewBox="0 0 24 24"  fill="none"  stroke="currentColor"  stroke-width="2"  stroke-linecap="round"  stroke-linejoin="round"  class="icon icon-tabler icons-tabler-outline icon-tabler-player-play"><path stroke="none" d="M0 0h24v24H0z" fill="none"/><path d="M7 4v16l13 -8z" /></svg>