refactor: Use NodeConnectionType consistently across the code base (no-changelog) (#10595)

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

@@ -1,6 +1,5 @@
 import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 import type {
-	ConnectionTypes,
 	INodeInputConfiguration,
 	INodeInputFilter,
 	IExecuteFunctions,
@@ -28,16 +27,16 @@ import { toolsAgentExecute } from './agents/ToolsAgent/execute';
 function getInputs(
 	agent: 'toolsAgent' | 'conversationalAgent' | 'openAiFunctionsAgent' | 'reActAgent' | 'sqlAgent',
 	hasOutputParser?: boolean,
-): Array<ConnectionTypes | INodeInputConfiguration> {
+): Array<NodeConnectionType | INodeInputConfiguration> {
 	interface SpecialInput {
-		type: ConnectionTypes;
+		type: NodeConnectionType;
 		filter?: INodeInputFilter;
 		required?: boolean;
 	}
 
 	const getInputData = (
 		inputs: SpecialInput[],
-	): Array<ConnectionTypes | INodeInputConfiguration> => {
+	): Array<NodeConnectionType | INodeInputConfiguration> => {
 		const displayNames: { [key: string]: string } = {
 			[NodeConnectionType.AiLanguageModel]: 'Model',
 			[NodeConnectionType.AiMemory]: 'Memory',

packages/@n8n/nodes-langchain/nodes/trigger/ChatTrigger/ChatTrigger.node.ts

@@ -75,7 +75,7 @@ export class ChatTrigger extends Node {
 				}
 			];
 		 })() }}`,
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				// eslint-disable-next-line n8n-nodes-base/node-class-description-credentials-name-unsuffixed

packages/@n8n/nodes-langchain/nodes/vendors/OpenAi/actions/versionDescription.ts

@@ -90,7 +90,7 @@ export const versionDescription: INodeTypeDescription = {
 		},
 	},
 	inputs: `={{(${configureNodeInputs})($parameter.resource, $parameter.operation, $parameter.hideTools)}}`,
-	outputs: ['main'],
+	outputs: [NodeConnectionType.Main],
 	credentials: [
 		{
 			name: 'openAiApi',

packages/@n8n/nodes-langchain/utils/logWrapper.ts

@@ -1,5 +1,5 @@
 import { NodeOperationError, NodeConnectionType } from 'n8n-workflow';
-import type { ConnectionTypes, IExecuteFunctions, INodeExecutionData } from 'n8n-workflow';
+import type { IExecuteFunctions, INodeExecutionData } from 'n8n-workflow';
 
 import type { Tool } from '@langchain/core/tools';
 import type { BaseMessage } from '@langchain/core/messages';
@@ -31,7 +31,7 @@ export async function callMethodAsync<T>(
 	this: T,
 	parameters: {
 		executeFunctions: IExecuteFunctions;
-		connectionType: ConnectionTypes;
+		connectionType: NodeConnectionType;
 		currentNodeRunIndex: number;
 		method: (...args: any[]) => Promise<unknown>;
 		arguments: unknown[];
@@ -78,7 +78,7 @@ export function callMethodSync<T>(
 	this: T,
 	parameters: {
 		executeFunctions: IExecuteFunctions;
-		connectionType: ConnectionTypes;
+		connectionType: NodeConnectionType;
 		currentNodeRunIndex: number;
 		method: (...args: any[]) => T;
 		arguments: unknown[];
@@ -123,7 +123,7 @@ export function logWrapper(
 ) {
 	return new Proxy(originalInstance, {
 		get: (target, prop) => {
-			let connectionType: ConnectionTypes | undefined;
+			let connectionType: NodeConnectionType | undefined;
 			// ========== BaseChatMemory ==========
 			if (isBaseChatMemory(originalInstance)) {
 				if (prop === 'loadMemoryVariables' && 'loadMemoryVariables' in target) {

packages/cli/src/__tests__/credentials-helper.test.ts

@@ -7,7 +7,7 @@ import type {
 	INode,
 	INodeProperties,
 } from 'n8n-workflow';
-import { deepCopy } from 'n8n-workflow';
+import { NodeConnectionType, deepCopy } from 'n8n-workflow';
 import { Workflow } from 'n8n-workflow';
 import { CredentialsHelper } from '@/credentials-helper';
 import { NodeTypes } from '@/node-types';
@@ -34,8 +34,8 @@ describe('CredentialsHelper', () => {
 							name: 'Set',
 							color: '#0000FF',
 						},
-						inputs: ['main'],
+						inputs: [NodeConnectionType.Main],
-						outputs: ['main'],
+						outputs: [NodeConnectionType.Main],
 						properties: [
 							{
 								displayName: 'Value1',

packages/cli/test/integration/webhooks.api.test.ts

@@ -1,6 +1,11 @@
 import { readFileSync } from 'fs';
 import { agent as testAgent } from 'supertest';
-import type { INodeType, INodeTypeDescription, IWebhookFunctions } from 'n8n-workflow';
+import {
+	NodeConnectionType,
+	type INodeType,
+	type INodeTypeDescription,
+	type IWebhookFunctions,
+} from 'n8n-workflow';
 
 import { AbstractServer } from '@/abstract-server';
 import { ExternalHooks } from '@/external-hooks';
@@ -182,7 +187,7 @@ describe('Webhook API', () => {
 			description: '',
 			defaults: {},
 			inputs: [],
-			outputs: ['main'],
+			outputs: [NodeConnectionType.Main],
 			webhooks: [
 				{
 					name: 'default',

packages/core/src/NodeExecuteFunctions.ts

@@ -38,7 +38,6 @@ import { extension, lookup } from 'mime-types';
 import type {
 	BinaryHelperFunctions,
 	CloseFunction,
-	ConnectionTypes,
 	ContextType,
 	EventNamesAiNodesType,
 	FieldType,
@@ -105,6 +104,7 @@ import type {
 	SchedulingFunctions,
 } from 'n8n-workflow';
 import {
+	NodeConnectionType,
 	ExpressionError,
 	LoggerProxy as Logger,
 	NodeApiError,
@@ -2623,13 +2623,13 @@ const addExecutionDataFunctions = async (
 	nodeName: string,
 	data: INodeExecutionData[][] | ExecutionBaseError,
 	runExecutionData: IRunExecutionData,
-	connectionType: ConnectionTypes,
+	connectionType: NodeConnectionType,
 	additionalData: IWorkflowExecuteAdditionalData,
 	sourceNodeName: string,
 	sourceNodeRunIndex: number,
 	currentNodeRunIndex: number,
 ): Promise<void> => {
-	if (connectionType === 'main') {
+	if (connectionType === NodeConnectionType.Main) {
 		throw new ApplicationError('Setting type is not supported for main connection', {
 			extra: { type },
 		});
@@ -2732,7 +2732,7 @@ async function getInputConnectionData(
 	executeData: IExecuteData | undefined,
 	mode: WorkflowExecuteMode,
 	closeFunctions: CloseFunction[],
-	inputName: ConnectionTypes,
+	inputName: NodeConnectionType,
 	itemIndex: number,
 ): Promise<unknown> {
 	const node = this.getNode();
@@ -3676,7 +3676,7 @@ export function getExecuteFunctions(
 			},
 
 			async getInputConnectionData(
-				inputName: ConnectionTypes,
+				inputName: NodeConnectionType,
 				itemIndex: number,
 			): Promise<unknown> {
 				return await getInputConnectionData.call(
@@ -3817,7 +3817,7 @@ export function getExecuteFunctions(
 			},
 
 			addInputData(
-				connectionType: ConnectionTypes,
+				connectionType: NodeConnectionType,
 				data: INodeExecutionData[][] | ExecutionBaseError,
 			): { index: number } {
 				const nodeName = this.getNode().name;
@@ -3847,7 +3847,7 @@ export function getExecuteFunctions(
 				return { index: currentNodeRunIndex };
 			},
 			addOutputData(
-				connectionType: ConnectionTypes,
+				connectionType: NodeConnectionType,
 				currentNodeRunIndex: number,
 				data: INodeExecutionData[][] | ExecutionBaseError,
 			): void {
@@ -4238,7 +4238,7 @@ export function getExecuteWebhookFunctions(
 				return additionalData.httpRequest.headers;
 			},
 			async getInputConnectionData(
-				inputName: ConnectionTypes,
+				inputName: NodeConnectionType,
 				itemIndex: number,
 			): Promise<unknown> {
 				// To be able to use expressions like "$json.sessionId" set the

packages/core/src/WorkflowExecute.ts

@@ -623,7 +623,11 @@ export class WorkflowExecute {
 
 						// Check if any of the parent nodes does not have any inputs. That
 						// would mean that it has to get added to the list of nodes to process.
-						const parentNodes = workflow.getParentNodes(inputData.node, 'main', -1);
+						const parentNodes = workflow.getParentNodes(
+							inputData.node,
+							NodeConnectionType.Main,
+							-1,
+						);
 						let nodeToAdd: string | undefined = inputData.node;
 						parentNodes.push(inputData.node);
 						parentNodes.reverse();
@@ -988,7 +992,11 @@ export class WorkflowExecute {
 								connectionIndex++
 							) {
 								if (
-									workflow.getHighestNode(executionNode.name, 'main', connectionIndex).length === 0
+									workflow.getHighestNode(
+										executionNode.name,
+										NodeConnectionType.Main,
+										connectionIndex,
+									).length === 0
 								) {
 									// If there is no valid incoming node (if all are disabled)
 									// then ignore that it has inputs and simply execute it as it is without

packages/core/test/helpers/constants.ts

@@ -45,8 +45,8 @@ export const predefinedNodesTypes: INodeTypeData = {
 					name: 'Version Test',
 					color: '#0000FF',
 				},
-				inputs: ['main'],
+				inputs: [NodeConnectionType.Main],
-				outputs: ['main'],
+				outputs: [NodeConnectionType.Main],
 				properties: [
 					{
 						displayName: 'Display V1',

packages/editor-ui/src/__tests__/mocks.ts

@@ -11,7 +11,7 @@ import type {
 	INodeTypeDescription,
 	INodeIssues,
 } from 'n8n-workflow';
-import { NodeHelpers, Workflow } from 'n8n-workflow';
+import { NodeConnectionType, NodeHelpers, Workflow } from 'n8n-workflow';
 import { uuid } from '@jsplumb/util';
 import { mock } from 'vitest-mock-extended';
 
@@ -52,8 +52,8 @@ export const mockNodeTypeDescription = ({
 	name,
 	version = 1,
 	credentials = [],
-	inputs = ['main'],
+	inputs = [NodeConnectionType.Main],
-	outputs = ['main'],
+	outputs = [NodeConnectionType.Main],
 }: {
 	name: INodeTypeDescription['name'];
 	version?: INodeTypeDescription['version'];

packages/editor-ui/src/components/ExpressionEditModal.vue

@@ -11,6 +11,7 @@ import { createExpressionTelemetryPayload } from '@/utils/telemetryUtils';
 import { useTelemetry } from '@/composables/useTelemetry';
 import type { Segment } from '@/types/expressions';
 import type { INodeProperties } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 import { outputTheme } from './ExpressionEditorModal/theme';
 import ExpressionOutput from './InlineExpressionEditor/ExpressionOutput.vue';
 import RunDataSchema from './RunDataSchema.vue';
@@ -152,7 +153,7 @@ async function onDrop(expression: string, event: MouseEvent) {
 					:nodes="parentNodes"
 					mapping-enabled
 					pane-type="input"
-					connection-type="main"
+					:connection-type="NodeConnectionType.Main"
 				/>
 			</div>
 

packages/editor-ui/src/components/InputPanel.vue

@@ -11,7 +11,6 @@ import { useNodeTypesStore } from '@/stores/nodeTypes.store';
 import { useUIStore } from '@/stores/ui.store';
 import { useWorkflowsStore } from '@/stores/workflows.store';
 import type {
-	ConnectionTypes,
 	IConnectedNode,
 	INodeInputConfiguration,
 	INodeOutputConfiguration,
@@ -121,10 +120,10 @@ export default defineComponent({
 			} else {
 				// If we can not figure out the node type we set no outputs
 				if (!Array.isArray(inputs)) {
-					inputs = [] as ConnectionTypes[];
+					inputs = [] as NodeConnectionType[];
 				}
 				if (!Array.isArray(outputs)) {
-					outputs = [] as ConnectionTypes[];
+					outputs = [] as NodeConnectionType[];
 				}
 			}
 
@@ -184,7 +183,7 @@ export default defineComponent({
 		},
 		rootNodesParents() {
 			const workflow = this.workflow;
-			const parentNodes = [...workflow.getParentNodes(this.rootNode, 'main')]
+			const parentNodes = [...workflow.getParentNodes(this.rootNode, NodeConnectionType.Main)]
 				.reverse()
 				.map((parent): IConnectedNode => ({ name: parent, depth: 1, indicies: [] }));
 
@@ -274,8 +273,8 @@ export default defineComponent({
 	},
 	methods: {
 		filterOutConnectionType(
-			item: ConnectionTypes | INodeOutputConfiguration | INodeInputConfiguration,
+			item: NodeConnectionType | INodeOutputConfiguration | INodeInputConfiguration,
-			type: ConnectionTypes,
+			type: NodeConnectionType,
 		) {
 			if (!item) return false;
 

packages/editor-ui/src/components/NDVFloatingNodes.vue

@@ -4,7 +4,7 @@ import { useNodeTypesStore } from '@/stores/nodeTypes.store';
 import { useWorkflowsStore } from '@/stores/workflows.store';
 import { computed, onMounted, onBeforeUnmount } from 'vue';
 import NodeIcon from '@/components/NodeIcon.vue';
-import type { INodeTypeDescription } from 'n8n-workflow';
+import { NodeConnectionType, type INodeTypeDescription } from 'n8n-workflow';
 
 interface Props {
 	rootNode: INodeUi;
@@ -71,8 +71,12 @@ const connectedNodes = computed<
 		[FloatingNodePosition.top]: getINodesFromNames(
 			workflow.getChildNodes(rootName, 'ALL_NON_MAIN'),
 		),
-		[FloatingNodePosition.right]: getINodesFromNames(workflow.getChildNodes(rootName, 'main', 1)),
+		[FloatingNodePosition.right]: getINodesFromNames(
-		[FloatingNodePosition.left]: getINodesFromNames(workflow.getParentNodes(rootName, 'main', 1)),
+			workflow.getChildNodes(rootName, NodeConnectionType.Main, 1),
+		),
+		[FloatingNodePosition.left]: getINodesFromNames(
+			workflow.getParentNodes(rootName, NodeConnectionType.Main, 1),
+		),
 	};
 });
 

packages/editor-ui/src/components/NDVSubConnections.vue

@@ -7,7 +7,11 @@ import { NodeHelpers } from 'n8n-workflow';
 import { useNodeHelpers } from '@/composables/useNodeHelpers';
 import NodeIcon from '@/components/NodeIcon.vue';
 import TitledList from '@/components/TitledList.vue';
-import type { ConnectionTypes, INodeInputConfiguration, INodeTypeDescription } from 'n8n-workflow';
+import type {
+	NodeConnectionType,
+	INodeInputConfiguration,
+	INodeTypeDescription,
+} from 'n8n-workflow';
 import { useDebounce } from '@/composables/useDebounce';
 import { OnClickOutside } from '@vueuse/components';
 
@@ -22,7 +26,7 @@ const nodeHelpers = useNodeHelpers();
 const { debounce } = useDebounce();
 const emit = defineEmits<{
 	switchSelectedNode: [nodeName: string];
-	openConnectionNodeCreator: [nodeName: string, connectionType: ConnectionTypes];
+	openConnectionNodeCreator: [nodeName: string, connectionType: NodeConnectionType];
 }>();
 
 interface NodeConfig {
@@ -33,7 +37,7 @@ interface NodeConfig {
 
 const possibleConnections = ref<INodeInputConfiguration[]>([]);
 
-const expandedGroups = ref<ConnectionTypes[]>([]);
+const expandedGroups = ref<NodeConnectionType[]>([]);
 const shouldShowNodeInputIssues = ref(false);
 
 const nodeType = computed(() =>
@@ -54,7 +58,7 @@ const nodeInputIssues = computed(() => {
 	return issues?.input ?? {};
 });
 
-const connectedNodes = computed<Record<ConnectionTypes, NodeConfig[]>>(() => {
+const connectedNodes = computed<Record<NodeConnectionType, NodeConfig[]>>(() => {
 	return possibleConnections.value.reduce(
 		(acc, connection) => {
 			const nodes = getINodesFromNames(
@@ -62,24 +66,24 @@ const connectedNodes = computed<Record<ConnectionTypes, NodeConfig[]>>(() => {
 			);
 			return { ...acc, [connection.type]: nodes };
 		},
-		{} as Record<ConnectionTypes, NodeConfig[]>,
+		{} as Record<NodeConnectionType, NodeConfig[]>,
 	);
 });
 
-function getConnectionConfig(connectionType: ConnectionTypes) {
+function getConnectionConfig(connectionType: NodeConnectionType) {
 	return possibleConnections.value.find((c) => c.type === connectionType);
 }
 
-function isMultiConnection(connectionType: ConnectionTypes) {
+function isMultiConnection(connectionType: NodeConnectionType) {
 	const connectionConfig = getConnectionConfig(connectionType);
 	return connectionConfig?.maxConnections !== 1;
 }
 
-function shouldShowConnectionTooltip(connectionType: ConnectionTypes) {
+function shouldShowConnectionTooltip(connectionType: NodeConnectionType) {
 	return isMultiConnection(connectionType) && !expandedGroups.value.includes(connectionType);
 }
 
-function expandConnectionGroup(connectionType: ConnectionTypes, isExpanded: boolean) {
+function expandConnectionGroup(connectionType: NodeConnectionType, isExpanded: boolean) {
 	// If the connection is a single connection, we don't need to expand the group
 	if (!isMultiConnection(connectionType)) {
 		return;
@@ -109,14 +113,14 @@ function getINodesFromNames(names: string[]): NodeConfig[] {
 		.filter((n): n is NodeConfig => n !== null);
 }
 
-function hasInputIssues(connectionType: ConnectionTypes) {
+function hasInputIssues(connectionType: NodeConnectionType) {
 	return (
 		shouldShowNodeInputIssues.value && (nodeInputIssues.value[connectionType] ?? []).length > 0
 	);
 }
 
 function isNodeInputConfiguration(
-	connectionConfig: ConnectionTypes | INodeInputConfiguration,
+	connectionConfig: NodeConnectionType | INodeInputConfiguration,
 ): connectionConfig is INodeInputConfiguration {
 	if (typeof connectionConfig === 'string') return false;
 
@@ -137,7 +141,7 @@ function getPossibleSubInputConnections(): INodeInputConfiguration[] {
 	return nonMainInputs;
 }
 
-function onNodeClick(nodeName: string, connectionType: ConnectionTypes) {
+function onNodeClick(nodeName: string, connectionType: NodeConnectionType) {
 	if (isMultiConnection(connectionType) && !expandedGroups.value.includes(connectionType)) {
 		expandConnectionGroup(connectionType, true);
 		return;
@@ -146,7 +150,7 @@ function onNodeClick(nodeName: string, connectionType: ConnectionTypes) {
 	emit('switchSelectedNode', nodeName);
 }
 
-function onPlusClick(connectionType: ConnectionTypes) {
+function onPlusClick(connectionType: NodeConnectionType) {
 	const connectionNodes = connectedNodes.value[connectionType];
 	if (
 		isMultiConnection(connectionType) &&

packages/editor-ui/src/components/Node.vue

@@ -10,7 +10,6 @@ import {
 	WAIT_TIME_UNLIMITED,
 } from '@/constants';
 import type {
-	ConnectionTypes,
 	ExecutionSummary,
 	INodeOutputConfiguration,
 	ITaskData,
@@ -244,7 +243,7 @@ const nodeWrapperStyles = computed<StyleValue>(() => {
 		const mainInputs = inputTypes.filter((output) => output === NodeConnectionType.Main);
 		styles['--node-main-input-count'] = mainInputs.length;
 
-		let outputs = [] as Array<ConnectionTypes | INodeOutputConfiguration>;
+		let outputs = [] as Array<NodeConnectionType | INodeOutputConfiguration>;
 		if (props.workflow.nodes[node.value.name]) {
 			outputs = NodeHelpers.getNodeOutputs(props.workflow, node.value, nodeType.value);
 		}

packages/editor-ui/src/components/Node/NodeCreator/__tests__/useActionsGeneration.test.ts

@@ -1,4 +1,4 @@
-import type { INodeProperties, INodeTypeDescription } from 'n8n-workflow';
+import { NodeConnectionType, type INodeProperties, type INodeTypeDescription } from 'n8n-workflow';
 import { useActionsGenerator } from '../composables/useActionsGeneration';
 
 describe('useActionsGenerator', () => {
@@ -14,8 +14,8 @@ describe('useActionsGenerator', () => {
 		defaults: {
 			name: 'Test',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		properties: [],
 	};
 

packages/editor-ui/src/components/NodeSettings.vue

@@ -7,7 +7,6 @@ import type {
 	INodeParameters,
 	INodeProperties,
 	NodeParameterValue,
-	ConnectionTypes,
 } from 'n8n-workflow';
 import {
 	NodeHelpers,
@@ -319,7 +318,7 @@ export default defineComponent({
 		onSwitchSelectedNode(node: string) {
 			this.$emit('switchSelectedNode', node);
 		},
-		onOpenConnectionNodeCreator(node: string, connectionType: ConnectionTypes) {
+		onOpenConnectionNodeCreator(node: string, connectionType: NodeConnectionType) {
 			this.$emit('openConnectionNodeCreator', node, connectionType);
 		},
 		populateHiddenIssuesSet() {

packages/editor-ui/src/components/RunData.vue

@@ -5,7 +5,6 @@ import { mapStores } from 'pinia';
 import { useStorage } from '@/composables/useStorage';
 import { saveAs } from 'file-saver';
 import type {
-	ConnectionTypes,
 	IBinaryData,
 	IBinaryKeyData,
 	IDataObject,
@@ -181,7 +180,7 @@ export default defineComponent({
 	},
 	data() {
 		return {
-			connectionType: NodeConnectionType.Main as ConnectionTypes,
+			connectionType: NodeConnectionType.Main as NodeConnectionType,
 			binaryDataPreviewActive: false,
 			dataSize: 0,
 			showData: false,
@@ -929,7 +928,7 @@ export default defineComponent({
 		getRawInputData(
 			runIndex: number,
 			outputIndex: number,
-			connectionType: ConnectionTypes = NodeConnectionType.Main,
+			connectionType: NodeConnectionType = NodeConnectionType.Main,
 		): INodeExecutionData[] {
 			let inputData: INodeExecutionData[] = [];
 
@@ -974,7 +973,7 @@ export default defineComponent({
 		getDataCount(
 			runIndex: number,
 			outputIndex: number,
-			connectionType: ConnectionTypes = NodeConnectionType.Main,
+			connectionType: NodeConnectionType = NodeConnectionType.Main,
 		) {
 			if (!this.node) {
 				return 0;
@@ -993,7 +992,7 @@ export default defineComponent({
 			this.outputIndex = 0;
 			this.refreshDataSize();
 			this.closeBinaryDataDisplay();
-			let outputTypes: ConnectionTypes[] = [];
+			let outputTypes: NodeConnectionType[] = [];
 			if (this.nodeType !== null && this.node !== null) {
 				const outputs = this.getResolvedNodeOutputs();
 				outputTypes = NodeHelpers.getConnectionTypes(outputs);

packages/editor-ui/src/components/RunDataSchema.vue

@@ -9,7 +9,6 @@ import { useNDVStore } from '@/stores/ndv.store';
 import { telemetry } from '@/plugins/telemetry';
 import {
 	NodeConnectionType,
-	type ConnectionTypes,
 	type IConnectedNode,
 	type IDataObject,
 	type INodeTypeDescription,
@@ -33,7 +32,7 @@ type Props = {
 	outputIndex?: number;
 	totalRuns?: number;
 	paneType: 'input' | 'output';
-	connectionType?: ConnectionTypes;
+	connectionType?: NodeConnectionType;
 	search?: string;
 };
 

packages/editor-ui/src/composables/__tests__/useContextMenu.test.ts

@@ -6,7 +6,7 @@ import { createPinia, setActivePinia } from 'pinia';
 import { useSourceControlStore } from '@/stores/sourceControl.store';
 import { useUIStore } from '@/stores/ui.store';
 import { useWorkflowsStore } from '@/stores/workflows.store';
-import { NodeHelpers } from 'n8n-workflow';
+import { NodeConnectionType, NodeHelpers } from 'n8n-workflow';
 
 const nodeFactory = (data: Partial<INodeUi> = {}): INodeUi => ({
 	id: faker.string.uuid(),
@@ -95,7 +95,10 @@ describe('useContextMenu', () => {
 		const { open, isOpen, actions, targetNodeIds } = useContextMenu();
 		const basicChain = nodeFactory({ type: BASIC_CHAIN_NODE_TYPE });
 		vi.spyOn(workflowsStore, 'getNodeById').mockReturnValue(basicChain);
-		vi.spyOn(NodeHelpers, 'getConnectionTypes').mockReturnValue(['main', 'ai_languageModel']);
+		vi.spyOn(NodeHelpers, 'getConnectionTypes').mockReturnValue([
+			NodeConnectionType.Main,
+			NodeConnectionType.AiLanguageModel,
+		]);
 		open(mockEvent, { source: 'node-right-click', nodeId: basicChain.id });
 
 		expect(isOpen.value).toBe(true);

packages/editor-ui/src/composables/__tests__/useNodeBase.spec.ts

@@ -1,7 +1,12 @@
 import { createPinia, setActivePinia } from 'pinia';
 import { mock, mockClear } from 'vitest-mock-extended';
 import type { BrowserJsPlumbInstance } from '@jsplumb/browser-ui';
-import type { INode, INodeTypeDescription, Workflow } from 'n8n-workflow';
+import {
+	NodeConnectionType,
+	type INode,
+	type INodeTypeDescription,
+	type Workflow,
+} from 'n8n-workflow';
 
 import { useNodeBase } from '@/composables/useNodeBase';
 import { useWorkflowsStore } from '@/stores/workflows.store';
@@ -16,8 +21,8 @@ describe('useNodeBase', () => {
 
 	const jsPlumbInstance = mock<BrowserJsPlumbInstance>();
 	const nodeTypeDescription = mock<INodeTypeDescription>({
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 	});
 	const workflowObject = mock<Workflow>();
 	const node = mock<INode>();

packages/editor-ui/src/composables/useCanvasOperations.ts

@@ -68,7 +68,6 @@ import * as NodeViewUtils from '@/utils/nodeViewUtils';
 import { isValidNodeConnectionType } from '@/utils/typeGuards';
 import type { Connection } from '@vue-flow/core';
 import type {
-	ConnectionTypes,
 	IConnection,
 	IConnections,
 	INode,
@@ -905,7 +904,7 @@ export function useCanvasOperations({ router }: { router: ReturnType<typeof useR
 					}
 				}
 
-				let outputs: Array<ConnectionTypes | INodeOutputConfiguration> = [];
+				let outputs: Array<NodeConnectionType | INodeOutputConfiguration> = [];
 				try {
 					// It fails when the outputs are an expression. As those nodes have
 					// normally no outputs by default and the only reason we need the
@@ -1154,7 +1153,7 @@ export function useCanvasOperations({ router }: { router: ReturnType<typeof useR
 				return false;
 			}
 
-			let inputs: Array<ConnectionTypes | INodeInputConfiguration> = [];
+			let inputs: Array<NodeConnectionType | INodeInputConfiguration> = [];
 			if (targetNodeType) {
 				inputs =
 					NodeHelpers.getNodeInputs(editableWorkflowObject.value, workflowNode, targetNodeType) ||

packages/editor-ui/src/composables/useNodeBase.ts

@@ -10,7 +10,6 @@ import {
 
 import { NodeHelpers, NodeConnectionType } from 'n8n-workflow';
 import type {
-	ConnectionTypes,
 	INodeInputConfiguration,
 	INodeTypeDescription,
 	INodeOutputConfiguration,
@@ -57,8 +56,8 @@ export function useNodeBase({
 
 	const nodeId = computed<string>(() => data.value?.id ?? '');
 
-	const inputs = ref<Array<ConnectionTypes | INodeInputConfiguration>>([]);
+	const inputs = ref<Array<NodeConnectionType | INodeInputConfiguration>>([]);
-	const outputs = ref<Array<ConnectionTypes | INodeOutputConfiguration>>([]);
+	const outputs = ref<Array<NodeConnectionType | INodeOutputConfiguration>>([]);
 
 	const createAddInputEndpointSpec = (
 		connectionName: NodeConnectionType,
@@ -139,7 +138,7 @@ export function useNodeBase({
 				inputConfiguration = value;
 			}
 
-			const inputName: ConnectionTypes = inputConfiguration.type;
+			const inputName: NodeConnectionType = inputConfiguration.type;
 
 			const rootCategoryInputName =
 				inputName === NodeConnectionType.Main ? NodeConnectionType.Main : 'other';
@@ -366,7 +365,7 @@ export function useNodeBase({
 		outputs.value.forEach((_value, i) => {
 			const outputConfiguration = outputConfigurations[i];
 
-			const outputName: ConnectionTypes = outputConfiguration.type;
+			const outputName: NodeConnectionType = outputConfiguration.type;
 
 			const rootCategoryOutputName =
 				outputName === NodeConnectionType.Main ? NodeConnectionType.Main : 'other';
@@ -536,12 +535,12 @@ export function useNodeBase({
 		addOutputEndpoints(node, nodeTypeData);
 	}
 
-	function getEndpointColor(connectionType: ConnectionTypes) {
+	function getEndpointColor(connectionType: NodeConnectionType) {
 		return `--node-type-${connectionType}-color`;
 	}
 
 	function getInputConnectionStyle(
-		connectionType: ConnectionTypes,
+		connectionType: NodeConnectionType,
 		nodeTypeData: INodeTypeDescription,
 	): EndpointOptions {
 		if (connectionType === NodeConnectionType.Main) {
@@ -559,7 +558,7 @@ export function useNodeBase({
 		}
 
 		const createSupplementalConnectionType = (
-			connectionName: ConnectionTypes,
+			connectionName: NodeConnectionType,
 		): EndpointOptions => ({
 			endpoint: createAddInputEndpointSpec(
 				connectionName as NodeConnectionType,
@@ -571,12 +570,12 @@ export function useNodeBase({
 	}
 
 	function getOutputConnectionStyle(
-		connectionType: ConnectionTypes,
+		connectionType: NodeConnectionType,
 		outputConfiguration: INodeOutputConfiguration,
 		nodeTypeData: INodeTypeDescription,
 	): EndpointOptions {
 		const createSupplementalConnectionType = (
-			connectionName: ConnectionTypes,
+			connectionName: NodeConnectionType,
 		): EndpointOptions => ({
 			endpoint: createDiamondOutputEndpointSpec(),
 			paintStyle: NodeViewUtils.getOutputEndpointStyle(

packages/editor-ui/src/composables/useNodeHelpers.ts

@@ -12,7 +12,7 @@ import {
 	WEBHOOK_NODE_TYPE,
 } from '@/constants';
 
-import { NodeHelpers, NodeConnectionType, ExpressionEvaluatorProxy } from 'n8n-workflow';
+import { NodeHelpers, ExpressionEvaluatorProxy, NodeConnectionType } from 'n8n-workflow';
 import type {
 	INodeProperties,
 	INodeCredentialDescription,
@@ -20,7 +20,6 @@ import type {
 	INodeIssues,
 	ICredentialType,
 	INodeIssueObjectProperty,
-	ConnectionTypes,
 	INodeInputConfiguration,
 	Workflow,
 	INodeExecutionData,
@@ -342,7 +341,7 @@ export function useNodeHelpers() {
 		const foundIssues: INodeIssueObjectProperty = {};
 
 		const workflowNode = workflow.getNode(node.name);
-		let inputs: Array<ConnectionTypes | INodeInputConfiguration> = [];
+		let inputs: Array<NodeConnectionType | INodeInputConfiguration> = [];
 		if (nodeType && workflowNode) {
 			inputs = NodeHelpers.getNodeInputs(workflow, workflowNode, nodeType);
 		}
@@ -571,7 +570,7 @@ export function useNodeHelpers() {
 		runIndex = 0,
 		outputIndex = 0,
 		paneType: NodePanelType = 'output',
-		connectionType: ConnectionTypes = NodeConnectionType.Main,
+		connectionType: NodeConnectionType = NodeConnectionType.Main,
 	): INodeExecutionData[] {
 		//TODO: check if this needs to be fixed in different place
 		if (
@@ -617,7 +616,7 @@ export function useNodeHelpers() {
 	function getInputData(
 		connectionsData: ITaskDataConnections,
 		outputIndex: number,
-		connectionType: ConnectionTypes = NodeConnectionType.Main,
+		connectionType: NodeConnectionType = NodeConnectionType.Main,
 	): INodeExecutionData[] {
 		return connectionsData?.[connectionType]?.[outputIndex] ?? [];
 	}
@@ -627,7 +626,7 @@ export function useNodeHelpers() {
 		node: string | null,
 		runIndex: number,
 		outputIndex: number,
-		connectionType: ConnectionTypes = NodeConnectionType.Main,
+		connectionType: NodeConnectionType = NodeConnectionType.Main,
 	): IBinaryKeyData[] {
 		if (node === null) {
 			return [];

packages/editor-ui/src/stores/nodeTypes.store.ts

@@ -4,7 +4,6 @@ import type { DynamicNodeParameters, NodeTypesByTypeNameAndVersion } from '@/Int
 import { addHeaders, addNodeTranslation } from '@/plugins/i18n';
 import { omit } from '@/utils/typesUtils';
 import type {
-	ConnectionTypes,
 	INode,
 	INodeInputConfiguration,
 	INodeOutputConfiguration,
@@ -138,7 +137,7 @@ export const useNodeTypesStore = defineStore(STORES.NODE_TYPES, () => {
 			(acc, node) => {
 				const outputTypes = node.outputs;
 				if (Array.isArray(outputTypes)) {
-					outputTypes.forEach((value: ConnectionTypes | INodeOutputConfiguration) => {
+					outputTypes.forEach((value: NodeConnectionType | INodeOutputConfiguration) => {
 						const outputType = typeof value === 'string' ? value : value.type;
 						if (!acc[outputType]) {
 							acc[outputType] = [];
@@ -148,7 +147,7 @@ export const useNodeTypesStore = defineStore(STORES.NODE_TYPES, () => {
 				} else {
 					// If outputs is not an array, it must be a string expression
 					// in which case we'll try to match all possible non-main output types that are supported
-					const connectorTypes: ConnectionTypes[] = [
+					const connectorTypes: NodeConnectionType[] = [
 						NodeConnectionType.AiVectorStore,
 						NodeConnectionType.AiChain,
 						NodeConnectionType.AiDocument,
@@ -159,7 +158,7 @@ export const useNodeTypesStore = defineStore(STORES.NODE_TYPES, () => {
 						NodeConnectionType.AiTextSplitter,
 						NodeConnectionType.AiTool,
 					];
-					connectorTypes.forEach((outputType: ConnectionTypes) => {
+					connectorTypes.forEach((outputType: NodeConnectionType) => {
 						if (outputTypes.includes(outputType)) {
 							acc[outputType] = acc[outputType] || [];
 							acc[outputType].push(node.name);
@@ -181,7 +180,7 @@ export const useNodeTypesStore = defineStore(STORES.NODE_TYPES, () => {
 				const inputTypes = node.inputs;
 				if (Array.isArray(inputTypes)) {
 					inputTypes.forEach(
-						(value: ConnectionTypes | INodeOutputConfiguration | INodeInputConfiguration) => {
+						(value: NodeConnectionType | INodeOutputConfiguration | INodeInputConfiguration) => {
 							const outputType = typeof value === 'string' ? value : value.type;
 							if (!acc[outputType]) {
 								acc[outputType] = [];

packages/editor-ui/src/stores/workflows.store.ts

@@ -55,7 +55,7 @@ import type {
 	IWorkflowSettings,
 	INodeType,
 } from 'n8n-workflow';
-import { deepCopy, NodeHelpers, Workflow } from 'n8n-workflow';
+import { deepCopy, NodeConnectionType, NodeHelpers, Workflow } from 'n8n-workflow';
 import { findLast } from 'lodash-es';
 
 import { useRootStore } from '@/stores/root.store';
@@ -1502,7 +1502,7 @@ export const useWorkflowsStore = defineStore(STORES.WORKFLOWS, () => {
 
 	function checkIfNodeHasChatParent(nodeName: string): boolean {
 		const workflow = getCurrentWorkflow();
-		const parents = workflow.getParentNodes(nodeName, 'main');
+		const parents = workflow.getParentNodes(nodeName, NodeConnectionType.Main);
 
 		const matchedChatNode = parents.find((parent) => {
 			const parentNodeType = getNodeByName(parent)?.type;

packages/editor-ui/src/utils/nodeViewUtils.ts

@@ -5,7 +5,6 @@ import type { ArrayAnchorSpec, ConnectorSpec, OverlaySpec, PaintStyle } from '@j
 import type { Connection, Endpoint, SelectOptions } from '@jsplumb/core';
 import { N8nConnector } from '@/plugins/connectors/N8nCustomConnector';
 import type {
-	ConnectionTypes,
 	IConnection,
 	INodeExecutionData,
 	INodeTypeDescription,
@@ -118,7 +117,7 @@ export function isCanvasAugmentedType<T>(overlay: T): overlay is T & { canvas: H
 	return typeof overlay === 'object' && overlay !== null && 'canvas' in overlay && !!overlay.canvas;
 }
 
-export const getConnectorColor = (type: ConnectionTypes, category?: string): string => {
+export const getConnectorColor = (type: NodeConnectionType, category?: string): string => {
 	if (category === 'error') {
 		return '--color-node-error-output-text-color';
 	}
@@ -132,7 +131,7 @@ export const getConnectorColor = (type: ConnectionTypes, category?: string): str
 
 export const getConnectorPaintStylePull = (connection: Connection): PaintStyle => {
 	const connectorColor = getConnectorColor(
-		connection.parameters.type as ConnectionTypes,
+		connection.parameters.type as NodeConnectionType,
 		connection.parameters.category,
 	);
 	const additionalStyles: PaintStyle = {};
@@ -148,7 +147,7 @@ export const getConnectorPaintStylePull = (connection: Connection): PaintStyle =
 
 export const getConnectorPaintStyleDefault = (connection: Connection): PaintStyle => {
 	const connectorColor = getConnectorColor(
-		connection.parameters.type as ConnectionTypes,
+		connection.parameters.type as NodeConnectionType,
 		connection.parameters.category,
 	);
 	return {
@@ -161,7 +160,10 @@ export const getConnectorPaintStyleData = (
 	connection: Connection,
 	category?: string,
 ): PaintStyle => {
-	const connectorColor = getConnectorColor(connection.parameters.type as ConnectionTypes, category);
+	const connectorColor = getConnectorColor(
+		connection.parameters.type as NodeConnectionType,
+		category,
+	);
 	return {
 		...CONNECTOR_PAINT_STYLE_DATA,
 		...(connectorColor ? { stroke: `var(${connectorColor})` } : {}),
@@ -194,7 +196,7 @@ export const CONNECTOR_ARROW_OVERLAYS: OverlaySpec[] = [
 ];
 
 export const getAnchorPosition = (
-	connectionType: ConnectionTypes,
+	connectionType: NodeConnectionType,
 	type: 'input' | 'output',
 	amount: number,
 	spacerIndexes: number[] = [],
@@ -256,7 +258,7 @@ export const getEndpointScope = (
 export const getInputEndpointStyle = (
 	nodeTypeData: INodeTypeDescription,
 	color: string,
-	connectionType: ConnectionTypes = NodeConnectionType.Main,
+	connectionType: NodeConnectionType = NodeConnectionType.Main,
 ): EndpointStyle => {
 	let width = 8;
 	let height = nodeTypeData && nodeTypeData.outputs.length > 2 ? 18 : 20;
@@ -664,7 +666,7 @@ export const showConnectionActions = (connection: Connection) => {
 export const getOutputSummary = (
 	data: ITaskData[],
 	nodeConnections: NodeInputConnections,
-	connectionType: ConnectionTypes,
+	connectionType: NodeConnectionType,
 ) => {
 	const outputMap: {
 		[sourceOutputIndex: string]: {

packages/editor-ui/src/views/NodeView.vue

@@ -74,7 +74,6 @@ import type {
 	ITelemetryTrackProperties,
 	IWorkflowBase,
 	Workflow,
-	ConnectionTypes,
 	INodeOutputConfiguration,
 	IRun,
 } from 'n8n-workflow';
@@ -2289,7 +2288,7 @@ export default defineComponent({
 						}
 					}
 
-					let outputs: Array<ConnectionTypes | INodeOutputConfiguration> = [];
+					let outputs: Array<NodeConnectionType | INodeOutputConfiguration> = [];
 					try {
 						// It fails when the outputs are an expression. As those nodes have
 						// normally no outputs by default and the only reason we need the
@@ -2424,7 +2423,7 @@ export default defineComponent({
 			sourceNodeOutputIndex: number,
 			targetNodeName: string,
 			targetNodeOuputIndex: number,
-			type: ConnectionTypes,
+			type: NodeConnectionType,
 		): IConnection | undefined {
 			const nodeConnections =
 				this.workflowsStore.outgoingConnectionsByNodeName(sourceNodeName)[type];
@@ -2531,7 +2530,7 @@ export default defineComponent({
 						lastSelectedEndpoint.scope as NodeConnectionType,
 					)
 				) {
-					const connectionType = lastSelectedEndpoint.scope as ConnectionTypes;
+					const connectionType = lastSelectedEndpoint.scope as NodeConnectionType;
 					const newNodeElement = this.instance.getManagedElement(newNodeData.id);
 					const newNodeConnections = this.instance.getEndpoints(newNodeElement);
 					const viableConnection = newNodeConnections.find((conn) => {
@@ -2712,7 +2711,7 @@ export default defineComponent({
 			if (targetNodeType?.inputs?.length) {
 				const workflow = this.workflowHelpers.getCurrentWorkflow();
 				const workflowNode = workflow.getNode(targetNode.name);
-				let inputs: Array<ConnectionTypes | INodeInputConfiguration> = [];
+				let inputs: Array<NodeConnectionType | INodeInputConfiguration> = [];
 				if (targetNodeType && workflowNode) {
 					inputs = NodeHelpers.getNodeInputs(workflow, workflowNode, targetNodeType);
 				}
@@ -3106,7 +3105,7 @@ export default defineComponent({
 				NodeViewUtils.hideConnectionActions(connection);
 				NodeViewUtils.resetConnection(connection);
 
-				const scope = connection.scope as ConnectionTypes;
+				const scope = connection.scope as NodeConnectionType;
 				const scopedEndpoints = Array.from(
 					document.querySelectorAll(`[data-jtk-scope-${scope}=true]`),
 				);
@@ -3609,8 +3608,8 @@ export default defineComponent({
 
 			const workflow = this.workflowHelpers.getCurrentWorkflow();
 			const workflowNode = workflow.getNode(node.name);
-			let inputs: Array<ConnectionTypes | INodeInputConfiguration> = [];
+			let inputs: Array<NodeConnectionType | INodeInputConfiguration> = [];
-			let outputs: Array<ConnectionTypes | INodeOutputConfiguration> = [];
+			let outputs: Array<NodeConnectionType | INodeOutputConfiguration> = [];
 			if (nodeType && workflowNode) {
 				inputs = NodeHelpers.getNodeInputs(workflow, workflowNode, nodeType);
 				outputs = NodeHelpers.getNodeOutputs(workflow, workflowNode, nodeType);

packages/nodes-base/.eslintrc.js

@@ -66,13 +66,13 @@ module.exports = {
 				'n8n-nodes-base/node-class-description-display-name-unsuffixed-trigger-node': 'error',
 				'n8n-nodes-base/node-class-description-empty-string': 'error',
 				'n8n-nodes-base/node-class-description-icon-not-svg': 'error',
-				'n8n-nodes-base/node-class-description-inputs-wrong-regular-node': 'error',
+				'n8n-nodes-base/node-class-description-inputs-wrong-regular-node': 'off',
 				'n8n-nodes-base/node-class-description-inputs-wrong-trigger-node': 'error',
 				'n8n-nodes-base/node-class-description-missing-subtitle': 'error',
 				'n8n-nodes-base/node-class-description-non-core-color-present': 'error',
 				'n8n-nodes-base/node-class-description-name-miscased': 'error',
 				'n8n-nodes-base/node-class-description-name-unsuffixed-trigger-node': 'error',
-				'n8n-nodes-base/node-class-description-outputs-wrong': 'error',
+				'n8n-nodes-base/node-class-description-outputs-wrong': 'off',
 				'n8n-nodes-base/node-dirname-against-convention': 'error',
 				'n8n-nodes-base/node-execute-block-double-assertion-for-items': 'error',
 				'n8n-nodes-base/node-execute-block-wrong-error-thrown': 'error',

packages/nodes-base/nodes/ActionNetwork/ActionNetwork.node.ts

@@ -5,7 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import {
 	actionNetworkApiRequest,
@@ -56,8 +56,8 @@ export class ActionNetwork implements INodeType {
 		defaults: {
 			name: 'Action Network',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'actionNetworkApi',

packages/nodes-base/nodes/ActiveCampaign/ActiveCampaign.node.ts

@@ -8,7 +8,7 @@ import type {
 	INodeTypeDescription,
 	IHttpRequestMethods,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import type { IProduct } from './GenericFunctions';
 import { activeCampaignApiRequest, activeCampaignApiRequestAllItems } from './GenericFunctions';
@@ -89,8 +89,8 @@ export class ActiveCampaign implements INodeType {
 		defaults: {
 			name: 'ActiveCampaign',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'activeCampaignApi',

packages/nodes-base/nodes/ActiveCampaign/ActiveCampaignTrigger.node.ts

@@ -8,6 +8,7 @@ import type {
 	INodeTypeDescription,
 	IWebhookResponseData,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { activeCampaignApiRequest, activeCampaignApiRequestAllItems } from './GenericFunctions';
 
@@ -23,7 +24,7 @@ export class ActiveCampaignTrigger implements INodeType {
 			name: 'ActiveCampaign Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'activeCampaignApi',

packages/nodes-base/nodes/AcuityScheduling/AcuitySchedulingTrigger.node.ts

@@ -6,6 +6,7 @@ import type {
 	INodeTypeDescription,
 	IWebhookResponseData,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { acuitySchedulingApiRequest } from './GenericFunctions';
 
@@ -22,7 +23,7 @@ export class AcuitySchedulingTrigger implements INodeType {
 			name: 'Acuity Scheduling Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'acuitySchedulingApi',

packages/nodes-base/nodes/Adalo/Adalo.node.ts

@@ -1,9 +1,10 @@
-import type {
+import {
-	IDataObject,
+	NodeConnectionType,
-	IExecuteSingleFunctions,
+	type IDataObject,
-	IHttpRequestOptions,
+	type IExecuteSingleFunctions,
-	INodeType,
+	type IHttpRequestOptions,
-	INodeTypeDescription,
+	type INodeType,
+	type INodeTypeDescription,
 } from 'n8n-workflow';
 import { collectionFields } from './CollectionDescription';
 import type { FieldsUiValues } from './types';
@@ -20,8 +21,8 @@ export class Adalo implements INodeType {
 		defaults: {
 			name: 'Adalo',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'adaloApi',

packages/nodes-base/nodes/Affinity/Affinity.node.ts

@@ -7,6 +7,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { affinityApiRequest, affinityApiRequestAllItems } from './GenericFunctions';
 
@@ -34,8 +35,8 @@ export class Affinity implements INodeType {
 		defaults: {
 			name: 'Affinity',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'affinityApi',

packages/nodes-base/nodes/Affinity/AffinityTrigger.node.ts

@@ -6,7 +6,7 @@ import type {
 	INodeTypeDescription,
 	IWebhookResponseData,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import { affinityApiRequest, eventsExist, mapResource } from './GenericFunctions';
 
@@ -22,7 +22,7 @@ export class AffinityTrigger implements INodeType {
 			name: 'Affinity Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'affinityApi',

packages/nodes-base/nodes/AgileCrm/AgileCrm.node.ts

@@ -5,7 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { jsonParse, NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, jsonParse, NodeOperationError } from 'n8n-workflow';
 
 import { contactFields, contactOperations } from './ContactDescription';
 
@@ -41,8 +41,8 @@ export class AgileCrm implements INodeType {
 		defaults: {
 			name: 'Agile CRM',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'agileCrmApi',

packages/nodes-base/nodes/AiTransform/AiTransform.node.ts

@@ -1,6 +1,7 @@
 /* eslint-disable n8n-nodes-base/node-dirname-against-convention */
 import {
 	NodeOperationError,
+	NodeConnectionType,
 	type IExecuteFunctions,
 	type INodeExecutionData,
 	type INodeType,
@@ -26,8 +27,8 @@ export class AiTransform implements INodeType {
 		defaults: {
 			name: 'AI Transform',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		parameterPane: 'wide',
 		properties: [
 			{

packages/nodes-base/nodes/Airtable/AirtableTrigger.node.ts

@@ -5,7 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import moment from 'moment-timezone';
 import type { IRecord } from './v1/GenericFunctions';
@@ -54,7 +54,7 @@ export class AirtableTrigger implements INodeType {
 		],
 		polling: true,
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		properties: [
 			{
 				displayName: 'Authentication',

packages/nodes-base/nodes/Airtable/v1/AirtableV1.node.ts

@@ -8,7 +8,7 @@ import type {
 	INodeTypeBaseDescription,
 	IHttpRequestMethods,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import { oldVersionNotice } from '../../../utils/descriptions';
 import { generatePairedItemData } from '../../../utils/utilities';
@@ -25,8 +25,8 @@ const versionDescription: INodeTypeDescription = {
 	defaults: {
 		name: 'Airtable',
 	},
-	inputs: ['main'],
+	inputs: [NodeConnectionType.Main],
-	outputs: ['main'],
+	outputs: [NodeConnectionType.Main],
 	credentials: [
 		{
 			name: 'airtableApi',

packages/nodes-base/nodes/Airtable/v2/actions/versionDescription.ts

@@ -1,5 +1,5 @@
 /* eslint-disable n8n-nodes-base/node-filename-against-convention */
-import type { INodeTypeDescription } from 'n8n-workflow';
+import { NodeConnectionType, type INodeTypeDescription } from 'n8n-workflow';
 
 import * as record from './record/Record.resource';
 import * as base from './base/Base.resource';
@@ -15,8 +15,8 @@ export const versionDescription: INodeTypeDescription = {
 	defaults: {
 		name: 'Airtable',
 	},
-	inputs: ['main'],
+	inputs: [NodeConnectionType.Main],
-	outputs: ['main'],
+	outputs: [NodeConnectionType.Main],
 	credentials: [
 		{
 			name: 'airtableTokenApi',

packages/nodes-base/nodes/Amqp/Amqp.node.ts

@@ -12,7 +12,7 @@ import type {
 	ICredentialsDecrypted,
 	ICredentialDataDecryptedObject,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 async function checkIfCredentialsValid(
 	credentials: IDataObject,
@@ -65,8 +65,8 @@ export class Amqp implements INodeType {
 		defaults: {
 			name: 'AMQP Sender',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'amqp',

packages/nodes-base/nodes/Amqp/AmqpTrigger.node.ts

@@ -10,7 +10,7 @@ import type {
 	IDeferredPromise,
 	IRun,
 } from 'n8n-workflow';
-import { deepCopy, jsonParse, NodeOperationError } from 'n8n-workflow';
+import { deepCopy, jsonParse, NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 export class AmqpTrigger implements INodeType {
 	description: INodeTypeDescription = {
@@ -24,7 +24,7 @@ export class AmqpTrigger implements INodeType {
 			name: 'AMQP Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'amqp',

packages/nodes-base/nodes/ApiTemplateIo/ApiTemplateIo.node.ts

@@ -7,7 +7,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import {
 	apiTemplateIoApiRequest,
@@ -28,8 +28,8 @@ export class ApiTemplateIo implements INodeType {
 		defaults: {
 			name: 'APITemplate.io',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'apiTemplateIoApi',

packages/nodes-base/nodes/Asana/Asana.node.ts

@@ -8,7 +8,7 @@ import type {
 	INodeTypeDescription,
 	JsonObject,
 } from 'n8n-workflow';
-import { NodeApiError, NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeApiError, NodeOperationError } from 'n8n-workflow';
 
 import moment from 'moment-timezone';
 
@@ -33,8 +33,8 @@ export class Asana implements INodeType {
 		defaults: {
 			name: 'Asana',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'asanaApi',

packages/nodes-base/nodes/Asana/AsanaTrigger.node.ts

@@ -8,7 +8,7 @@ import type {
 	INodeTypeDescription,
 	IWebhookResponseData,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import { asanaApiRequest, getWorkspaces } from './GenericFunctions';
 
@@ -28,7 +28,7 @@ export class AsanaTrigger implements INodeType {
 			name: 'Asana Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'asanaApi',

packages/nodes-base/nodes/Automizy/Automizy.node.ts

@@ -1,12 +1,13 @@
-import type {
+import {
-	IExecuteFunctions,
+	type IExecuteFunctions,
-	IDataObject,
+	type IDataObject,
-	ILoadOptionsFunctions,
+	type ILoadOptionsFunctions,
-	INodeExecutionData,
+	type INodeExecutionData,
-	INodePropertyOptions,
+	type INodePropertyOptions,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
-	NodeExecutionWithMetadata,
+	type NodeExecutionWithMetadata,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 import { automizyApiRequest, automizyApiRequestAllItems } from './GenericFunctions';
@@ -28,8 +29,8 @@ export class Automizy implements INodeType {
 		defaults: {
 			name: 'Automizy',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		hidden: true,
 		credentials: [
 			{

packages/nodes-base/nodes/Autopilot/Autopilot.node.ts

@@ -1,12 +1,13 @@
-import type {
+import {
-	IExecuteFunctions,
+	type IExecuteFunctions,
-	IDataObject,
+	type IDataObject,
-	ILoadOptionsFunctions,
+	type ILoadOptionsFunctions,
-	INodeExecutionData,
+	type INodeExecutionData,
-	INodePropertyOptions,
+	type INodePropertyOptions,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
-	IHttpRequestMethods,
+	type IHttpRequestMethods,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 import { autopilotApiRequest, autopilotApiRequestAllItems } from './GenericFunctions';
@@ -31,8 +32,8 @@ export class Autopilot implements INodeType {
 		defaults: {
 			name: 'Autopilot',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'autopilotApi',

packages/nodes-base/nodes/Autopilot/AutopilotTrigger.node.ts

@@ -6,6 +6,7 @@ import type {
 	INodeTypeDescription,
 	IWebhookResponseData,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { snakeCase } from 'change-case';
 import { autopilotApiRequest } from './GenericFunctions';
@@ -23,7 +24,7 @@ export class AutopilotTrigger implements INodeType {
 			name: 'Autopilot Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'autopilotApi',

packages/nodes-base/nodes/Aws/AwsLambda.node.ts

@@ -8,7 +8,7 @@ import type {
 	INodeTypeDescription,
 	JsonObject,
 } from 'n8n-workflow';
-import { NodeApiError } from 'n8n-workflow';
+import { NodeConnectionType, NodeApiError } from 'n8n-workflow';
 
 import { awsApiRequestREST } from './GenericFunctions';
 
@@ -24,8 +24,8 @@ export class AwsLambda implements INodeType {
 		defaults: {
 			name: 'AWS Lambda',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/Aws/AwsSns.node.ts

@@ -1,12 +1,13 @@
-import type {
+import {
-	IExecuteFunctions,
+	type IExecuteFunctions,
-	IDataObject,
+	type IDataObject,
-	ILoadOptionsFunctions,
+	type ILoadOptionsFunctions,
-	INodeExecutionData,
+	type INodeExecutionData,
-	INodeListSearchItems,
+	type INodeListSearchItems,
-	INodeListSearchResult,
+	type INodeListSearchResult,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 import { awsApiRequestSOAP } from './GenericFunctions';
@@ -23,8 +24,8 @@ export class AwsSns implements INodeType {
 		defaults: {
 			name: 'AWS SNS',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/Aws/AwsSnsTrigger.node.ts

@@ -8,7 +8,7 @@ import type {
 	INodeTypeDescription,
 	IWebhookResponseData,
 } from 'n8n-workflow';
-import { jsonParse, NodeOperationError } from 'n8n-workflow';
+import { jsonParse, NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import get from 'lodash/get';
 import { awsApiRequestSOAP } from './GenericFunctions';
@@ -26,7 +26,7 @@ export class AwsSnsTrigger implements INodeType {
 			name: 'AWS SNS Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/Aws/CertificateManager/AwsCertificateManager.node.ts

@@ -5,6 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { certificateFields, certificateOperations } from './CertificateDescription';
 
@@ -22,8 +23,8 @@ export class AwsCertificateManager implements INodeType {
 		defaults: {
 			name: 'AWS Certificate Manager',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/Aws/Comprehend/AwsComprehend.node.ts

@@ -5,6 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { awsApiRequestREST } from './GenericFunctions';
 
@@ -20,8 +21,8 @@ export class AwsComprehend implements INodeType {
 		defaults: {
 			name: 'AWS Comprehend',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/Aws/DynamoDB/AwsDynamoDB.node.ts

@@ -1,12 +1,13 @@
 /* eslint-disable n8n-nodes-base/node-filename-against-convention */
-import type {
+import {
-	IExecuteFunctions,
+	type IExecuteFunctions,
-	IDataObject,
+	type IDataObject,
-	ILoadOptionsFunctions,
+	type ILoadOptionsFunctions,
-	INodeExecutionData,
+	type INodeExecutionData,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
-	NodeParameterValue,
+	type NodeParameterValue,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 import { awsApiRequest, awsApiRequestAllItems } from './GenericFunctions';
@@ -42,8 +43,8 @@ export class AwsDynamoDB implements INodeType {
 		defaults: {
 			name: 'AWS DynamoDB',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/Aws/ELB/AwsElb.node.ts

@@ -8,6 +8,7 @@ import type {
 	INodeTypeDescription,
 	JsonObject,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { awsApiRequestSOAP, awsApiRequestSOAPAllItems } from './GenericFunctions';
 
@@ -30,8 +31,8 @@ export class AwsElb implements INodeType {
 		defaults: {
 			name: 'AWS ELB',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/Aws/Rekognition/AwsRekognition.node.ts

@@ -5,6 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { awsApiRequestREST, keysTPascalCase } from './GenericFunctions';
 
@@ -20,8 +21,8 @@ export class AwsRekognition implements INodeType {
 		defaults: {
 			name: 'AWS Rekognition',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/Aws/S3/V1/AwsS3V1.node.ts

@@ -12,7 +12,7 @@ import type {
 	INodeTypeBaseDescription,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import { bucketFields, bucketOperations } from './BucketDescription';
 
@@ -42,8 +42,8 @@ export class AwsS3V1 implements INodeType {
 			defaults: {
 				name: 'AWS S3',
 			},
-			inputs: ['main'],
+			inputs: [NodeConnectionType.Main],
-			outputs: ['main'],
+			outputs: [NodeConnectionType.Main],
 			credentials: [
 				{
 					name: 'aws',

packages/nodes-base/nodes/Aws/S3/V2/AwsS3V2.node.ts

@@ -13,7 +13,7 @@ import type {
 	INodeTypeBaseDescription,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import { bucketFields, bucketOperations } from './BucketDescription';
 
@@ -42,8 +42,8 @@ export class AwsS3V2 implements INodeType {
 			defaults: {
 				name: 'AWS S3',
 			},
-			inputs: ['main'],
+			inputs: [NodeConnectionType.Main],
-			outputs: ['main'],
+			outputs: [NodeConnectionType.Main],
 			credentials: [
 				{
 					name: 'aws',

packages/nodes-base/nodes/Aws/SES/AwsSes.node.ts

@@ -8,7 +8,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import { awsApiRequestSOAP, awsApiRequestSOAPAllItems } from './GenericFunctions';
 
@@ -30,8 +30,8 @@ export class AwsSes implements INodeType {
 		defaults: {
 			name: 'AWS SES',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/Aws/SQS/AwsSqs.node.ts

@@ -10,7 +10,7 @@ import type {
 	INodeTypeDescription,
 	JsonObject,
 } from 'n8n-workflow';
-import { NodeApiError } from 'n8n-workflow';
+import { NodeApiError, NodeConnectionType } from 'n8n-workflow';
 
 import { pascalCase } from 'change-case';
 import { awsApiRequestSOAP } from '../GenericFunctions';
@@ -27,8 +27,8 @@ export class AwsSqs implements INodeType {
 		defaults: {
 			name: 'AWS SQS',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/Aws/Textract/AwsTextract.node.ts

@@ -1,13 +1,14 @@
-import type {
+import {
-	ICredentialDataDecryptedObject,
+	NodeConnectionType,
-	ICredentialsDecrypted,
+	type ICredentialDataDecryptedObject,
-	ICredentialTestFunctions,
+	type ICredentialsDecrypted,
-	IDataObject,
+	type ICredentialTestFunctions,
-	IExecuteFunctions,
+	type IDataObject,
-	INodeCredentialTestResult,
+	type IExecuteFunctions,
-	INodeExecutionData,
+	type INodeCredentialTestResult,
-	INodeType,
+	type INodeExecutionData,
-	INodeTypeDescription,
+	type INodeType,
+	type INodeTypeDescription,
 } from 'n8n-workflow';
 
 import type { IExpenseDocument } from './GenericFunctions';
@@ -25,8 +26,8 @@ export class AwsTextract implements INodeType {
 		defaults: {
 			name: 'AWS Textract',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/Aws/Transcribe/AwsTranscribe.node.ts

@@ -5,6 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { awsApiRequestREST, awsApiRequestRESTAllItems } from './GenericFunctions';
 
@@ -20,8 +21,8 @@ export class AwsTranscribe implements INodeType {
 		defaults: {
 			name: 'AWS Transcribe',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'aws',

packages/nodes-base/nodes/BambooHr/v1/actions/versionDescription.ts

@@ -1,5 +1,5 @@
 /* eslint-disable n8n-nodes-base/node-filename-against-convention */
-import type { INodeTypeDescription } from 'n8n-workflow';
+import { NodeConnectionType, type INodeTypeDescription } from 'n8n-workflow';
 
 import * as file from './file';
 import * as employee from './employee';
@@ -22,9 +22,9 @@ export const versionDescription: INodeTypeDescription = {
 	group: ['transform'],
 	// eslint-disable-next-line n8n-nodes-base/node-class-description-icon-not-svg
 	icon: 'file:bambooHr.png',
-	inputs: ['main'],
+	inputs: [NodeConnectionType.Main],
 	name: 'bambooHr',
-	outputs: ['main'],
+	outputs: [NodeConnectionType.Main],
 	properties: [
 		{
 			displayName: 'Resource',

packages/nodes-base/nodes/Bannerbear/Bannerbear.node.ts

@@ -7,6 +7,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { bannerbearApiRequest, keysToSnakeCase } from './GenericFunctions';
 
@@ -27,8 +28,8 @@ export class Bannerbear implements INodeType {
 		defaults: {
 			name: 'Bannerbear',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'bannerbearApi',

packages/nodes-base/nodes/Baserow/Baserow.node.ts

@@ -1,10 +1,11 @@
-import type {
+import {
-	IExecuteFunctions,
+	type IExecuteFunctions,
-	IDataObject,
+	type IDataObject,
-	ILoadOptionsFunctions,
+	type ILoadOptionsFunctions,
-	INodeExecutionData,
+	type INodeExecutionData,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 import {
@@ -38,8 +39,8 @@ export class Baserow implements INodeType {
 		defaults: {
 			name: 'Baserow',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'baserowApi',

packages/nodes-base/nodes/Beeminder/Beeminder.node.ts

@@ -1,12 +1,13 @@
-import type {
+import {
-	IExecuteFunctions,
+	type IExecuteFunctions,
-	IDataObject,
+	type IDataObject,
-	ILoadOptionsFunctions,
+	type ILoadOptionsFunctions,
-	INodeExecutionData,
+	type INodeExecutionData,
-	INodeParameters,
+	type INodeParameters,
-	INodePropertyOptions,
+	type INodePropertyOptions,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 import moment from 'moment-timezone';
@@ -32,8 +33,8 @@ export class Beeminder implements INodeType {
 		},
 		// eslint-disable-next-line n8n-nodes-base/node-class-description-icon-not-svg
 		icon: 'file:beeminder.png',
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'beeminderApi',

packages/nodes-base/nodes/Bitbucket/BitbucketTrigger.node.ts

@@ -1,16 +1,17 @@
-import type {
+import {
-	IHookFunctions,
+	type IHookFunctions,
-	IWebhookFunctions,
+	type IWebhookFunctions,
-	ICredentialsDecrypted,
+	type ICredentialsDecrypted,
-	ICredentialTestFunctions,
+	type ICredentialTestFunctions,
-	IDataObject,
+	type IDataObject,
-	ILoadOptionsFunctions,
+	type ILoadOptionsFunctions,
-	INodeCredentialTestResult,
+	type INodeCredentialTestResult,
-	INodePropertyOptions,
+	type INodePropertyOptions,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
-	IWebhookResponseData,
+	type IWebhookResponseData,
-	IRequestOptions,
+	type IRequestOptions,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 import { bitbucketApiRequest, bitbucketApiRequestAllItems } from './GenericFunctions';
@@ -27,7 +28,7 @@ export class BitbucketTrigger implements INodeType {
 			name: 'Bitbucket Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'bitbucketApi',

packages/nodes-base/nodes/Bitly/Bitly.node.ts

@@ -7,6 +7,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { linkFields, linkOperations } from './LinkDescription';
 
@@ -24,8 +25,8 @@ export class Bitly implements INodeType {
 		defaults: {
 			name: 'Bitly',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'bitlyApi',

packages/nodes-base/nodes/Bitwarden/Bitwarden.node.ts

@@ -6,7 +6,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import isEmpty from 'lodash/isEmpty';
 import partialRight from 'lodash/partialRight';
@@ -46,8 +46,8 @@ export class Bitwarden implements INodeType {
 		defaults: {
 			name: 'Bitwarden',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'bitwardenApi',

packages/nodes-base/nodes/Box/Box.node.ts

@@ -5,7 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import moment from 'moment-timezone';
 import { noCase } from 'change-case';
@@ -28,8 +28,8 @@ export class Box implements INodeType {
 		defaults: {
 			name: 'Box',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'boxOAuth2Api',

packages/nodes-base/nodes/Box/BoxTrigger.node.ts

@@ -1,9 +1,10 @@
-import type {
+import {
-	IHookFunctions,
+	type IHookFunctions,
-	IWebhookFunctions,
+	type IWebhookFunctions,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
-	IWebhookResponseData,
+	type IWebhookResponseData,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 import { boxApiRequest, boxApiRequestAllItems } from './GenericFunctions';
@@ -21,7 +22,7 @@ export class BoxTrigger implements INodeType {
 			name: 'Box Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'boxOAuth2Api',

packages/nodes-base/nodes/Brandfetch/Brandfetch.node.ts

@@ -5,6 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { brandfetchApiRequest } from './GenericFunctions';
 
@@ -22,8 +23,8 @@ export class Brandfetch implements INodeType {
 		defaults: {
 			name: 'Brandfetch',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'brandfetchApi',

packages/nodes-base/nodes/Brevo/Brevo.node.ts

@@ -1,5 +1,6 @@
 /* eslint-disable n8n-nodes-base/node-filename-against-convention */
 import type { INodeType, INodeTypeDescription } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 import { attributeFields, attributeOperations } from './AttributeDescription';
 import { contactFields, contactOperations } from './ContactDescription';
 import { emailFields, emailOperations } from './EmailDescription';
@@ -18,8 +19,8 @@ export class Brevo implements INodeType {
 		defaults: {
 			name: 'Brevo',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'sendInBlueApi',

packages/nodes-base/nodes/Brevo/BrevoTrigger.node.ts

@@ -1,10 +1,11 @@
 /* eslint-disable n8n-nodes-base/node-filename-against-convention */
-import type {
+import {
-	IHookFunctions,
+	NodeConnectionType,
-	INodeType,
+	type IHookFunctions,
-	INodeTypeDescription,
+	type INodeType,
-	IWebhookFunctions,
+	type INodeTypeDescription,
-	IWebhookResponseData,
+	type IWebhookFunctions,
+	type IWebhookResponseData,
 } from 'n8n-workflow';
 import { BrevoWebhookApi } from './GenericFunctions';
 
@@ -29,7 +30,7 @@ export class BrevoTrigger implements INodeType {
 		inputs: [],
 		// keep sendinblue name for backward compatibility
 		name: 'sendInBlueTrigger',
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		version: 1,
 		webhooks: [
 			{

packages/nodes-base/nodes/Bubble/Bubble.node.ts

@@ -5,7 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import { bubbleApiRequest, bubbleApiRequestAllItems, validateJSON } from './GenericFunctions';
 
@@ -23,8 +23,8 @@ export class Bubble implements INodeType {
 		defaults: {
 			name: 'Bubble',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'bubbleApi',

packages/nodes-base/nodes/Cal/CalTrigger.node.ts

@@ -1,12 +1,13 @@
-import type {
+import {
-	IDataObject,
+	type IDataObject,
-	IHookFunctions,
+	type IHookFunctions,
-	IWebhookFunctions,
+	type IWebhookFunctions,
-	ILoadOptionsFunctions,
+	type ILoadOptionsFunctions,
-	INodePropertyOptions,
+	type INodePropertyOptions,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
-	IWebhookResponseData,
+	type IWebhookResponseData,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 import { calApiRequest, sortOptionParameters } from './GenericFunctions';
@@ -24,7 +25,7 @@ export class CalTrigger implements INodeType {
 			name: 'Cal.com Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'calApi',

packages/nodes-base/nodes/Calendly/CalendlyTrigger.node.ts

@@ -6,6 +6,7 @@ import type {
 	INodeTypeDescription,
 	IWebhookResponseData,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { calendlyApiRequest, getAuthenticationType } from './GenericFunctions';
 
@@ -21,7 +22,7 @@ export class CalendlyTrigger implements INodeType {
 			name: 'Calendly Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'calendlyApi',

packages/nodes-base/nodes/Chargebee/Chargebee.node.ts

@@ -9,7 +9,7 @@ import type {
 	IRequestOptions,
 	IHttpRequestMethods,
 } from 'n8n-workflow';
-import { NodeApiError, NodeOperationError } from 'n8n-workflow';
+import { NodeApiError, NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 interface CustomProperty {
 	name: string;
@@ -37,8 +37,8 @@ export class Chargebee implements INodeType {
 		defaults: {
 			name: 'Chargebee',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'chargebeeApi',

packages/nodes-base/nodes/Chargebee/ChargebeeTrigger.node.ts

@@ -1,9 +1,10 @@
-import type {
+import {
-	IDataObject,
+	type IDataObject,
-	IWebhookFunctions,
+	type IWebhookFunctions,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
-	IWebhookResponseData,
+	type IWebhookResponseData,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 export class ChargebeeTrigger implements INodeType {
@@ -19,7 +20,7 @@ export class ChargebeeTrigger implements INodeType {
 			name: 'Chargebee Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		webhooks: [
 			{
 				name: 'default',

packages/nodes-base/nodes/CircleCi/CircleCi.node.ts

@@ -5,6 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { pipelineFields, pipelineOperations } from './PipelineDescription';
 
@@ -23,8 +24,8 @@ export class CircleCi implements INodeType {
 		defaults: {
 			name: 'CircleCI',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'circleCiApi',

packages/nodes-base/nodes/Cisco/Webex/CiscoWebex.node.ts

@@ -7,6 +7,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import moment from 'moment-timezone';
 import { getAttachments, webexApiRequest, webexApiRequestAllItems } from './GenericFunctions';
@@ -39,8 +40,8 @@ export class CiscoWebex implements INodeType {
 				required: true,
 			},
 		],
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		properties: [
 			{
 				displayName: 'Resource',

packages/nodes-base/nodes/Cisco/Webex/CiscoWebexTrigger.node.ts

@@ -7,6 +7,7 @@ import type {
 	INodeTypeDescription,
 	IWebhookResponseData,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import {
 	getAutomaticSecret,
@@ -30,7 +31,7 @@ export class CiscoWebexTrigger implements INodeType {
 			name: 'Webex by Cisco Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'ciscoWebexOAuth2Api',

packages/nodes-base/nodes/Clearbit/Clearbit.node.ts

@@ -5,6 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { clearbitApiRequest } from './GenericFunctions';
 
@@ -24,8 +25,8 @@ export class Clearbit implements INodeType {
 		defaults: {
 			name: 'Clearbit',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'clearbitApi',

packages/nodes-base/nodes/ClickUp/ClickUp.node.ts

@@ -7,7 +7,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
 
 import moment from 'moment-timezone';
 import { clickupApiRequest, clickupApiRequestAllItems, validateJSON } from './GenericFunctions';
@@ -61,8 +61,8 @@ export class ClickUp implements INodeType {
 		defaults: {
 			name: 'ClickUp',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'clickUpApi',

packages/nodes-base/nodes/ClickUp/ClickUpTrigger.node.ts

@@ -9,6 +9,7 @@ import type {
 	INodeTypeDescription,
 	IWebhookResponseData,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { clickupApiRequest } from './GenericFunctions';
 
@@ -24,7 +25,7 @@ export class ClickUpTrigger implements INodeType {
 			name: 'ClickUp Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'clickUpApi',

packages/nodes-base/nodes/Clockify/Clockify.node.ts

@@ -7,6 +7,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import moment from 'moment-timezone';
 import { clockifyApiRequest, clockifyApiRequestAllItems } from './GenericFunctions';
@@ -43,8 +44,8 @@ export class Clockify implements INodeType {
 		defaults: {
 			name: 'Clockify',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'clockifyApi',

packages/nodes-base/nodes/Clockify/ClockifyTrigger.node.ts

@@ -9,6 +9,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { clockifyApiRequest } from './GenericFunctions';
 
@@ -28,7 +29,7 @@ export class ClockifyTrigger implements INodeType {
 			name: 'Clockify Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'clockifyApi',

packages/nodes-base/nodes/Cloudflare/Cloudflare.node.ts

@@ -7,6 +7,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { cloudflareApiRequest, cloudflareApiRequestAllItems } from './GenericFunctions';
 
@@ -24,8 +25,8 @@ export class Cloudflare implements INodeType {
 		defaults: {
 			name: 'Cloudflare',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'cloudflareApi',

packages/nodes-base/nodes/Cockpit/Cockpit.node.ts

@@ -7,6 +7,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 import { collectionFields, collectionOperations } from './CollectionDescription';
 import {
 	createCollectionEntry,
@@ -31,8 +32,8 @@ export class Cockpit implements INodeType {
 		defaults: {
 			name: 'Cockpit',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'cockpitApi',

packages/nodes-base/nodes/Coda/Coda.node.ts

@@ -8,7 +8,7 @@ import type {
 	INodeTypeDescription,
 	JsonObject,
 } from 'n8n-workflow';
-import { NodeApiError } from 'n8n-workflow';
+import { NodeConnectionType, NodeApiError } from 'n8n-workflow';
 import { codaApiRequest, codaApiRequestAllItems } from './GenericFunctions';
 import { tableFields, tableOperations } from './TableDescription';
 import { formulaFields, formulaOperations } from './FormulaDescription';
@@ -27,8 +27,8 @@ export class Coda implements INodeType {
 		defaults: {
 			name: 'Coda',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'codaApi',

packages/nodes-base/nodes/Code/Code.node.ts

@@ -1,10 +1,11 @@
-import type {
+import {
-	CodeExecutionMode,
+	NodeConnectionType,
-	CodeNodeEditorLanguage,
+	type CodeExecutionMode,
-	IExecuteFunctions,
+	type CodeNodeEditorLanguage,
-	INodeExecutionData,
+	type IExecuteFunctions,
-	INodeType,
+	type INodeExecutionData,
-	INodeTypeDescription,
+	type INodeType,
+	type INodeTypeDescription,
 } from 'n8n-workflow';
 import set from 'lodash/set';
 import { javascriptCodeDescription } from './descriptions/JavascriptCodeDescription';
@@ -28,8 +29,8 @@ export class Code implements INodeType {
 		defaults: {
 			name: 'Code',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		parameterPane: 'wide',
 		properties: [
 			{

packages/nodes-base/nodes/CoinGecko/CoinGecko.node.ts

@@ -7,6 +7,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import moment from 'moment-timezone';
 import { coinFields, coinOperations } from './CoinDescription';
@@ -27,8 +28,8 @@ export class CoinGecko implements INodeType {
 		defaults: {
 			name: 'CoinGecko',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		properties: [
 			{
 				displayName: 'Resource',

packages/nodes-base/nodes/CompareDatasets/CompareDatasets.node.ts

@@ -1,9 +1,10 @@
-import type {
+import {
-	IExecuteFunctions,
+	type IExecuteFunctions,
-	IDataObject,
+	type IDataObject,
-	INodeExecutionData,
+	type INodeExecutionData,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
+	NodeConnectionType,
 } from 'n8n-workflow';
 import {
 	checkInput,
@@ -22,11 +23,16 @@ export class CompareDatasets implements INodeType {
 		description: 'Compare two inputs for changes',
 		defaults: { name: 'Compare Datasets' },
 		// eslint-disable-next-line n8n-nodes-base/node-class-description-inputs-wrong-regular-node
-		inputs: ['main', 'main'],
+		inputs: [NodeConnectionType.Main, NodeConnectionType.Main],
 		inputNames: ['Input A', 'Input B'],
 		requiredInputs: 1,
 		// eslint-disable-next-line n8n-nodes-base/node-class-description-outputs-wrong
-		outputs: ['main', 'main', 'main', 'main'],
+		outputs: [
+			NodeConnectionType.Main,
+			NodeConnectionType.Main,
+			NodeConnectionType.Main,
+			NodeConnectionType.Main,
+		],
 		outputNames: ['In A only', 'Same', 'Different', 'In B only'],
 		properties: [
 			{

packages/nodes-base/nodes/Compression/Compression.node.ts

@@ -1,10 +1,11 @@
 import { promisify } from 'util';
-import type {
+import {
-	IBinaryKeyData,
+	NodeConnectionType,
-	IExecuteFunctions,
+	type IBinaryKeyData,
-	INodeExecutionData,
+	type IExecuteFunctions,
-	INodeType,
+	type INodeExecutionData,
-	INodeTypeDescription,
+	type INodeType,
+	type INodeTypeDescription,
 } from 'n8n-workflow';
 
 import * as fflate from 'fflate';
@@ -57,8 +58,8 @@ export class Compression implements INodeType {
 			name: 'Compression',
 			color: '#408000',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		properties: [
 			{
 				displayName: 'Operation',

packages/nodes-base/nodes/Contentful/Contentful.node.ts

@@ -5,6 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { contentfulApiRequestAllItems, contentfulApiRequest } from './GenericFunctions';
 
@@ -27,8 +28,8 @@ export class Contentful implements INodeType {
 		defaults: {
 			name: 'Contentful',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'contentfulApi',

packages/nodes-base/nodes/ConvertKit/ConvertKit.node.ts

@@ -1,11 +1,12 @@
-import type {
+import {
-	IExecuteFunctions,
+	type IExecuteFunctions,
-	ILoadOptionsFunctions,
+	type ILoadOptionsFunctions,
-	IDataObject,
+	type IDataObject,
-	INodeExecutionData,
+	type INodeExecutionData,
-	INodePropertyOptions,
+	type INodePropertyOptions,
-	INodeType,
+	type INodeType,
-	INodeTypeDescription,
+	type INodeTypeDescription,
+	NodeConnectionType,
 } from 'n8n-workflow';
 
 import { convertKitApiRequest } from './GenericFunctions';
@@ -32,8 +33,8 @@ export class ConvertKit implements INodeType {
 		defaults: {
 			name: 'ConvertKit',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'convertKitApi',

packages/nodes-base/nodes/ConvertKit/ConvertKitTrigger.node.ts

@@ -8,6 +8,7 @@ import type {
 	INodeTypeDescription,
 	IWebhookResponseData,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { snakeCase } from 'change-case';
 import { convertKitApiRequest } from './GenericFunctions';
@@ -25,7 +26,7 @@ export class ConvertKitTrigger implements INodeType {
 			name: 'ConvertKit Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'convertKitApi',

packages/nodes-base/nodes/Copper/Copper.node.ts

@@ -5,6 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import {
 	adjustCompanyFields,
@@ -46,8 +47,8 @@ export class Copper implements INodeType {
 		defaults: {
 			name: 'Copper',
 		},
-		inputs: ['main'],
+		inputs: [NodeConnectionType.Main],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'copperApi',

packages/nodes-base/nodes/Copper/CopperTrigger.node.ts

@@ -6,6 +6,7 @@ import type {
 	INodeTypeDescription,
 	IWebhookResponseData,
 } from 'n8n-workflow';
+import { NodeConnectionType } from 'n8n-workflow';
 
 import { copperApiRequest, getAutomaticSecret } from './GenericFunctions';
 
@@ -21,7 +22,7 @@ export class CopperTrigger implements INodeType {
 			name: 'Copper Trigger',
 		},
 		inputs: [],
-		outputs: ['main'],
+		outputs: [NodeConnectionType.Main],
 		credentials: [
 			{
 				name: 'copperApi',