first commit

packages/@n8n/nodes-langchain/nodes/agents/Agent/V2/AgentV2.node.ts

@@ -0,0 +1,144 @@
+import { NodeConnectionTypes } from 'n8n-workflow';
+import type {
+	IExecuteFunctions,
+	INodeExecutionData,
+	INodeType,
+	INodeTypeDescription,
+	INodeTypeBaseDescription,
+} from 'n8n-workflow';
+
+import {
+	promptTypeOptionsDeprecated,
+	textFromGuardrailsNode,
+	textFromPreviousNode,
+	textInput,
+} from '@utils/descriptions';
+
+import { getToolsAgentProperties } from '../agents/ToolsAgent/V2/description';
+import { toolsAgentExecute } from '../agents/ToolsAgent/V2/execute';
+import { getInputs } from '../utils';
+
+export class AgentV2 implements INodeType {
+	description: INodeTypeDescription;
+
+	constructor(baseDescription: INodeTypeBaseDescription) {
+		this.description = {
+			...baseDescription,
+			version: [2, 2.1, 2.2],
+			defaults: {
+				name: 'AI Agent',
+				color: '#404040',
+			},
+			inputs: `={{
+				((hasOutputParser, needsFallback) => {
+					${getInputs.toString()};
+					return getInputs(true, hasOutputParser, needsFallback);
+				})($parameter.hasOutputParser === undefined || $parameter.hasOutputParser === true, $parameter.needsFallback !== undefined && $parameter.needsFallback === true)
+			}}`,
+			outputs: [NodeConnectionTypes.Main],
+			builderHint: {
+				...baseDescription.builderHint,
+				inputs: {
+					ai_languageModel: { required: true },
+					ai_memory: { required: false },
+					ai_tool: { required: false },
+					ai_outputParser: {
+						required: false,
+						displayOptions: { show: { hasOutputParser: [true] } },
+					},
+				},
+			},
+			properties: [
+				{
+					displayName:
+						'Tip: Get a feel for agents with our quick <a href="https://docs.n8n.io/advanced-ai/intro-tutorial/" target="_blank">tutorial</a> or see an <a href="/workflows/templates/1954" target="_blank">example</a> of how this node works',
+					name: 'aiAgentStarterCallout',
+					type: 'callout',
+					default: '',
+				},
+				promptTypeOptionsDeprecated,
+				{
+					...textFromGuardrailsNode,
+					displayOptions: {
+						show: {
+							promptType: ['guardrails'],
+						},
+					},
+				},
+				{
+					...textFromPreviousNode,
+					displayOptions: {
+						show: {
+							promptType: ['auto'],
+						},
+					},
+				},
+				{
+					...textInput,
+					displayOptions: {
+						show: {
+							promptType: ['define'],
+						},
+					},
+				},
+				{
+					displayName: 'Require Specific Output Format',
+					name: 'hasOutputParser',
+					type: 'boolean',
+					default: false,
+					noDataExpression: true,
+				},
+				{
+					displayName: `Connect an <a data-action='openSelectiveNodeCreator' data-action-parameter-connectiontype='${NodeConnectionTypes.AiOutputParser}'>output parser</a> on the canvas to specify the output format you require`,
+					name: 'notice',
+					type: 'notice',
+					default: '',
+					displayOptions: {
+						show: {
+							hasOutputParser: [true],
+						},
+					},
+				},
+				{
+					displayName: 'Enable Fallback Model',
+					name: 'needsFallback',
+					type: 'boolean',
+					default: false,
+					noDataExpression: true,
+					displayOptions: {
+						show: {
+							'@version': [{ _cnd: { gte: 2.1 } }],
+						},
+					},
+				},
+				{
+					displayName:
+						'Connect an additional language model on the canvas to use it as a fallback if the main model fails',
+					name: 'fallbackNotice',
+					type: 'notice',
+					default: '',
+					displayOptions: {
+						show: {
+							needsFallback: [true],
+						},
+					},
+				},
+				...getToolsAgentProperties({ withStreaming: true }),
+			],
+			hints: [
+				{
+					message:
+						'You are using streaming responses. Make sure to set the response mode to "Streaming Response" on the connected trigger node.',
+					type: 'warning',
+					location: 'outputPane',
+					whenToDisplay: 'afterExecution',
+					displayCondition: '={{ $parameter["enableStreaming"] === true }}',
+				},
+			],
+		};
+	}
+
+	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
+		return await toolsAgentExecute.call(this);
+	}
+}