feat(core): Improve Langsmith traces for AI executions (#9081)

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

packages/@n8n/nodes-langchain/nodes/agents/Agent/agents/ConversationalAgent/execute.ts

@@ -1,9 +1,5 @@
-import {
-	type IExecuteFunctions,
-	type INodeExecutionData,
-	NodeConnectionType,
-	NodeOperationError,
-} from 'n8n-workflow';
+import { NodeConnectionType, NodeOperationError } from 'n8n-workflow';
+import type { IExecuteFunctions, INodeExecutionData } from 'n8n-workflow';
 
 import { initializeAgentExecutorWithOptions } from 'langchain/agents';
 import type { BaseChatMemory } from '@langchain/community/memory/chat_memory';
@@ -16,13 +12,13 @@ import {
 	getOptionalOutputParsers,
 	getConnectedTools,
 } from '../../../../../utils/helpers';
+import { getTracingConfig } from '../../../../../utils/tracing';
 
 export async function conversationalAgentExecute(
 	this: IExecuteFunctions,
 	nodeVersion: number,
 ): Promise<INodeExecutionData[][]> {
 	this.logger.verbose('Executing Conversational Agent');
-
 	const model = await this.getInputConnectionData(NodeConnectionType.AiLanguageModel, 0);
 
 	if (!isChatInstance(model)) {
@@ -104,7 +100,9 @@ export async function conversationalAgentExecute(
 			input = (await prompt.invoke({ input })).value;
 		}
 
-		let response = await agentExecutor.call({ input, outputParsers });
+		let response = await agentExecutor
+			.withConfig(getTracingConfig(this))
+			.invoke({ input, outputParsers });
 
 		if (outputParser) {
 			response = { output: await outputParser.parse(response.output as string) };

packages/@n8n/nodes-langchain/nodes/agents/Agent/agents/OpenAiFunctionsAgent/execute.ts

@@ -17,6 +17,7 @@ import {
 	getOptionalOutputParsers,
 	getPromptInputByType,
 } from '../../../../../utils/helpers';
+import { getTracingConfig } from '../../../../../utils/tracing';
 
 export async function openAiFunctionsAgentExecute(
 	this: IExecuteFunctions,
@@ -104,7 +105,9 @@ export async function openAiFunctionsAgentExecute(
 			input = (await prompt.invoke({ input })).value;
 		}
 
-		let response = await agentExecutor.call({ input, outputParsers });
+		let response = await agentExecutor
+			.withConfig(getTracingConfig(this))
+			.invoke({ input, outputParsers });
 
 		if (outputParser) {
 			response = { output: await outputParser.parse(response.output as string) };

packages/@n8n/nodes-langchain/nodes/agents/Agent/agents/PlanAndExecuteAgent/execute.ts

@@ -15,6 +15,7 @@ import {
 	getOptionalOutputParsers,
 	getPromptInputByType,
 } from '../../../../../utils/helpers';
+import { getTracingConfig } from '../../../../../utils/tracing';
 
 export async function planAndExecuteAgentExecute(
 	this: IExecuteFunctions,
@@ -79,7 +80,9 @@ export async function planAndExecuteAgentExecute(
 			input = (await prompt.invoke({ input })).value;
 		}
 
-		let response = await agentExecutor.call({ input, outputParsers });
+		let response = await agentExecutor
+			.withConfig(getTracingConfig(this))
+			.invoke({ input, outputParsers });
 
 		if (outputParser) {
 			response = { output: await outputParser.parse(response.output as string) };

packages/@n8n/nodes-langchain/nodes/agents/Agent/agents/ReActAgent/execute.ts

@@ -17,6 +17,7 @@ import {
 	getPromptInputByType,
 	isChatInstance,
 } from '../../../../../utils/helpers';
+import { getTracingConfig } from '../../../../../utils/tracing';
 
 export async function reActAgentAgentExecute(
 	this: IExecuteFunctions,
@@ -100,7 +101,10 @@ export async function reActAgentAgentExecute(
 			input = (await prompt.invoke({ input })).value;
 		}
 
-		let response = await agentExecutor.call({ input, outputParsers });
+		let response = await agentExecutor
+			.withConfig(getTracingConfig(this))
+			.invoke({ input, outputParsers });
+
 		if (outputParser) {
 			response = { output: await outputParser.parse(response.output as string) };
 		}

packages/@n8n/nodes-langchain/nodes/agents/Agent/agents/SqlAgent/execute.ts

@@ -14,6 +14,7 @@ import type { BaseChatMemory } from '@langchain/community/memory/chat_memory';
 import type { DataSource } from '@n8n/typeorm';
 
 import { getPromptInputByType, serializeChatHistory } from '../../../../../utils/helpers';
+import { getTracingConfig } from '../../../../../utils/tracing';
 import { getSqliteDataSource } from './other/handlers/sqlite';
 import { getPostgresDataSource } from './other/handlers/postgres';
 import { SQL_PREFIX, SQL_SUFFIX } from './other/prompts';
@@ -126,7 +127,7 @@ export async function sqlAgentAgentExecute(
 
 		let response: IDataObject;
 		try {
-			response = await agentExecutor.call({
+			response = await agentExecutor.withConfig(getTracingConfig(this)).invoke({
 				input,
 				signal: this.getExecutionCancelSignal(),
 				chatHistory,

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

@@ -10,6 +10,7 @@ import type {
 } from 'n8n-workflow';
 import type { OpenAIToolType } from 'langchain/dist/experimental/openai_assistant/schema';
 import { getConnectedTools } from '../../../utils/helpers';
+import { getTracingConfig } from '../../../utils/tracing';
 import { formatToOpenAIAssistantTool } from './utils';
 
 export class OpenAiAssistant implements INodeType {
@@ -373,7 +374,7 @@ export class OpenAiAssistant implements INodeType {
 				tools,
 			});
 
-			const response = await agentExecutor.call({
+			const response = await agentExecutor.withConfig(getTracingConfig(this)).invoke({
 				content: input,
 				signal: this.getExecutionCancelSignal(),
 				timeout: options.timeout ?? 10000,

packages/@n8n/nodes-langchain/nodes/chains/ChainLLM/ChainLlm.node.ts

@@ -27,6 +27,7 @@ import {
 	getPromptInputByType,
 	isChatInstance,
 } from '../../../utils/helpers';
+import { getTracingConfig } from '../../../utils/tracing';
 
 interface MessagesTemplate {
 	type: string;
@@ -154,9 +155,9 @@ async function createSimpleLLMChain(
 	const chain = new LLMChain({
 		llm,
 		prompt,
-	});
+	}).withConfig(getTracingConfig(context));
 
-	const response = (await chain.call({
+	const response = (await chain.invoke({
 		query,
 		signal: context.getExecutionCancelSignal(),
 	})) as string[];
@@ -203,8 +204,9 @@ async function getChain(
 	);
 
 	const chain = prompt.pipe(llm).pipe(combinedOutputParser);
-
-	const response = (await chain.invoke({ query })) as string | string[];
+	const response = (await chain.withConfig(getTracingConfig(context)).invoke({ query })) as
+		| string
+		| string[];
 
 	return Array.isArray(response) ? response : [response];
 }

packages/@n8n/nodes-langchain/nodes/chains/ChainRetrievalQA/ChainRetrievalQa.node.ts

@@ -12,6 +12,7 @@ import type { BaseLanguageModel } from '@langchain/core/language_models/base';
 import type { BaseRetriever } from '@langchain/core/retrievers';
 import { getTemplateNoticeField } from '../../../utils/sharedFields';
 import { getPromptInputByType } from '../../../utils/helpers';
+import { getTracingConfig } from '../../../utils/tracing';
 
 export class ChainRetrievalQa implements INodeType {
 	description: INodeTypeDescription = {
@@ -176,7 +177,7 @@ export class ChainRetrievalQa implements INodeType {
 				throw new NodeOperationError(this.getNode(), 'The ‘query‘ parameter is empty.');
 			}
 
-			const response = await chain.call({ query });
+			const response = await chain.withConfig(getTracingConfig(this)).invoke({ query });
 			returnData.push({ json: { response } });
 		}
 		return await this.prepareOutputData(returnData);

packages/@n8n/nodes-langchain/nodes/chains/ChainSummarization/V2/ChainSummarizationV2.node.ts

@@ -18,6 +18,7 @@ import { N8nBinaryLoader } from '../../../../utils/N8nBinaryLoader';
 import { getTemplateNoticeField } from '../../../../utils/sharedFields';
 import { REFINE_PROMPT_TEMPLATE, DEFAULT_PROMPT_TEMPLATE } from '../prompt';
 import { getChainPromptsArgs } from '../helpers';
+import { getTracingConfig } from '../../../../utils/tracing';
 
 function getInputs(parameters: IDataObject) {
 	const chunkingMode = parameters?.chunkingMode;
@@ -364,7 +365,7 @@ export class ChainSummarizationV2 implements INodeType {
 					? await documentInput.processItem(item, itemIndex)
 					: documentInput;
 
-				const response = await chain.call({
+				const response = await chain.withConfig(getTracingConfig(this)).invoke({
 					input_documents: processedDocuments,
 				});
 

packages/@n8n/nodes-langchain/nodes/retrievers/RetrieverWorkflow/RetrieverWorkflow.node.ts

@@ -16,6 +16,7 @@ import { Document } from '@langchain/core/documents';
 
 import type { SetField, SetNodeOptions } from 'n8n-nodes-base/dist/nodes/Set/v2/helpers/interfaces';
 import * as manual from 'n8n-nodes-base/dist/nodes/Set/v2/manual.mode';
+import type { CallbackManagerForRetrieverRun } from '@langchain/core/callbacks/manager';
 import { logWrapper } from '../../../utils/logWrapper';
 
 function objectToString(obj: Record<string, string> | IDataObject, level = 0) {
@@ -287,7 +288,10 @@ export class RetrieverWorkflow implements INodeType {
 				this.executeFunctions = executeFunctions;
 			}
 
-			async getRelevantDocuments(query: string): Promise<Document[]> {
+			async _getRelevantDocuments(
+				query: string,
+				config?: CallbackManagerForRetrieverRun,
+			): Promise<Document[]> {
 				const source = this.executeFunctions.getNodeParameter('source', itemIndex) as string;
 
 				const baseMetadata: IDataObject = {
@@ -360,6 +364,7 @@ export class RetrieverWorkflow implements INodeType {
 					receivedItems = (await this.executeFunctions.executeWorkflow(
 						workflowInfo,
 						items,
+						config?.getChild(),
 					)) as INodeExecutionData[][];
 				} catch (error) {
 					// Make sure a valid error gets returned that can by json-serialized else it will

packages/@n8n/nodes-langchain/nodes/tools/ToolWorkflow/ToolWorkflow.node.ts

@@ -16,6 +16,7 @@ import * as manual from 'n8n-nodes-base/dist/nodes/Set/v2/manual.mode';
 import { DynamicTool } from '@langchain/core/tools';
 import get from 'lodash/get';
 import isObject from 'lodash/isObject';
+import type { CallbackManagerForToolRun } from '@langchain/core/callbacks/manager';
 import { getConnectionHintNoticeField } from '../../../utils/sharedFields';
 
 export class ToolWorkflow implements INodeType {
@@ -320,7 +321,10 @@ export class ToolWorkflow implements INodeType {
 		const name = this.getNodeParameter('name', itemIndex) as string;
 		const description = this.getNodeParameter('description', itemIndex) as string;
 
-		const runFunction = async (query: string): Promise<string> => {
+		const runFunction = async (
+			query: string,
+			runManager?: CallbackManagerForToolRun,
+		): Promise<string> => {
 			const source = this.getNodeParameter('source', itemIndex) as string;
 			const responsePropertyName = this.getNodeParameter(
 				'responsePropertyName',
@@ -385,7 +389,11 @@ export class ToolWorkflow implements INodeType {
 
 			let receivedData: INodeExecutionData;
 			try {
-				receivedData = (await this.executeWorkflow(workflowInfo, items)) as INodeExecutionData;
+				receivedData = (await this.executeWorkflow(
+					workflowInfo,
+					items,
+					runManager?.getChild(),
+				)) as INodeExecutionData;
 			} catch (error) {
 				// Make sure a valid error gets returned that can by json-serialized else it will
 				// not show up in the frontend
@@ -413,13 +421,13 @@ export class ToolWorkflow implements INodeType {
 				name,
 				description,
 
-				func: async (query: string): Promise<string> => {
+				func: async (query: string, runManager?: CallbackManagerForToolRun): Promise<string> => {
 					const { index } = this.addInputData(NodeConnectionType.AiTool, [[{ json: { query } }]]);
 
 					let response: string = '';
 					let executionError: ExecutionError | undefined;
 					try {
-						response = await runFunction(query);
+						response = await runFunction(query, runManager);
 					} catch (error) {
 						// TODO: Do some more testing. Issues here should actually fail the workflow
 						// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment

packages/@n8n/nodes-langchain/nodes/vendors/OpenAi/actions/assistant/message.operation.ts

@@ -11,6 +11,7 @@ import { formatToOpenAIAssistantTool } from '../../helpers/utils';
 import { assistantRLC } from '../descriptions';
 
 import { getConnectedTools } from '../../../../../utils/helpers';
+import { getTracingConfig } from '../../../../../utils/tracing';
 
 const properties: INodeProperties[] = [
 	assistantRLC,
@@ -181,7 +182,7 @@ export async function execute(this: IExecuteFunctions, i: number): Promise<INode
 		tools: tools ?? [],
 	});
 
-	const response = await agentExecutor.invoke({
+	const response = await agentExecutor.withConfig(getTracingConfig(this)).invoke({
 		content: input,
 		signal: this.getExecutionCancelSignal(),
 		timeout: options.timeout ?? 10000,

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

@@ -0,0 +1,26 @@
+import type { BaseCallbackConfig } from '@langchain/core/callbacks/manager';
+import type { IExecuteFunctions } from 'n8n-workflow';
+
+interface TracingConfig {
+	additionalMetadata?: Record<string, unknown>;
+}
+
+export function getTracingConfig(
+	context: IExecuteFunctions,
+	config: TracingConfig = {},
+): BaseCallbackConfig {
+	const parentRunManager = context.getParentCallbackManager
+		? context.getParentCallbackManager()
+		: undefined;
+
+	return {
+		runName: `[${context.getWorkflow().name}] ${context.getNode().name}`,
+		metadata: {
+			execution_id: context.getExecutionId(),
+			workflow: context.getWorkflow(),
+			node: context.getNode().name,
+			...(config.additionalMetadata ?? {}),
+		},
+		callbacks: parentRunManager,
+	};
+}

packages/cli/src/WorkflowExecuteAdditionalData.ts

@@ -24,6 +24,7 @@ import type {
 	ExecutionStatus,
 	ExecutionError,
 	EventNamesAiNodesType,
+	CallbackManager,
 } from 'n8n-workflow';
 import {
 	ApplicationError,
@@ -754,6 +755,7 @@ async function executeWorkflow(
 		loadedWorkflowData?: IWorkflowBase;
 		loadedRunData?: IWorkflowExecutionDataProcess;
 		parentWorkflowSettings?: IWorkflowSettings;
+		parentCallbackManager?: CallbackManager;
 	},
 ): Promise<Array<INodeExecutionData[] | null> | IWorkflowExecuteProcess> {
 	const internalHooks = Container.get(InternalHooks);
@@ -815,6 +817,7 @@ async function executeWorkflow(
 			workflowData,
 		);
 		additionalDataIntegrated.executionId = executionId;
+		additionalDataIntegrated.parentCallbackManager = options.parentCallbackManager;
 
 		// Make sure we pass on the original executeWorkflow function we received
 		// This one already contains changes to talk to parent process

packages/core/src/NodeExecuteFunctions.ts

@@ -98,6 +98,7 @@ import type {
 	Workflow,
 	WorkflowActivateMode,
 	WorkflowExecuteMode,
+	CallbackManager,
 } from 'n8n-workflow';
 import {
 	ExpressionError,
@@ -3487,6 +3488,7 @@ export function getExecuteFunctions(
 			async executeWorkflow(
 				workflowInfo: IExecuteWorkflowInfo,
 				inputData?: INodeExecutionData[],
+				parentCallbackManager?: CallbackManager,
 			): Promise<any> {
 				return await additionalData
 					.executeWorkflow(workflowInfo, additionalData, {
@@ -3494,6 +3496,7 @@ export function getExecuteFunctions(
 						inputData,
 						parentWorkflowSettings: workflow.settings,
 						node,
+						parentCallbackManager,
 					})
 					.then(
 						async (result) =>
@@ -3719,6 +3722,7 @@ export function getExecuteFunctions(
 					msg,
 				});
 			},
+			getParentCallbackManager: () => additionalData.parentCallbackManager,
 		};
 	})(workflow, runExecutionData, connectionInputData, inputData, node) as IExecuteFunctions;
 }

packages/workflow/package.json

@@ -65,6 +65,7 @@
     "recast": "0.21.5",
     "title-case": "3.0.3",
     "transliteration": "2.3.5",
-    "xml2js": "0.6.2"
+    "xml2js": "0.6.2",
+    "@langchain/core": "0.1.41"
   }
 }

packages/workflow/src/Interfaces.ts

@@ -19,6 +19,7 @@ import type { WorkflowHooks } from './WorkflowHooks';
 import type { NodeOperationError } from './errors/node-operation.error';
 import type { NodeApiError } from './errors/node-api.error';
 import type { AxiosProxyConfig } from 'axios';
+import type { CallbackManager as CallbackManagerLC } from '@langchain/core/callbacks/manager';
 
 export interface IAdditionalCredentialOptions {
 	oauth2?: IOAuth2Options;
@@ -842,6 +843,7 @@ export type IExecuteFunctions = ExecuteFunctions.GetNodeParameterFn &
 		executeWorkflow(
 			workflowInfo: IExecuteWorkflowInfo,
 			inputData?: INodeExecutionData[],
+			parentCallbackManager?: CallbackManager,
 		): Promise<any>;
 		getInputConnectionData(
 			inputName: ConnectionTypes,
@@ -881,6 +883,8 @@ export type IExecuteFunctions = ExecuteFunctions.GetNodeParameterFn &
 				getBinaryDataBuffer(itemIndex: number, propertyName: string): Promise<Buffer>;
 				copyInputItems(items: INodeExecutionData[], properties: string[]): IDataObject[];
 			};
+
+		getParentCallbackManager(): CallbackManager | undefined;
 	};
 
 export interface IExecuteSingleFunctions extends BaseExecutionFunctions {
@@ -2028,6 +2032,7 @@ export interface IWorkflowExecuteAdditionalData {
 			loadedWorkflowData?: IWorkflowBase;
 			loadedRunData?: any;
 			parentWorkflowSettings?: IWorkflowSettings;
+			parentCallbackManager?: CallbackManager;
 		},
 	) => Promise<any>;
 	executionId?: string;
@@ -2059,6 +2064,7 @@ export interface IWorkflowExecuteAdditionalData {
 			nodeType?: string;
 		},
 	) => Promise<void>;
+	parentCallbackManager?: CallbackManager;
 }
 
 export type WorkflowExecuteMode =
@@ -2583,3 +2589,5 @@ export type BannerName =
 export type Functionality = 'regular' | 'configuration-node' | 'pairedItem';
 
 export type Result<T, E> = { ok: true; result: T } | { ok: false; error: E };
+
+export type CallbackManager = CallbackManagerLC;

pnpm-lock.yaml

@@ -1515,6 +1515,9 @@ importers:
 
   packages/workflow:
     dependencies:
+      '@langchain/core':
+        specifier: 0.1.41
+        version: 0.1.41
       '@n8n/tournament':
         specifier: 1.0.2
         version: 1.0.2