feat: Add AI tool building capabilities (#7336)

Github issue / Community forum post (link here to close automatically): https://community.n8n.io/t/langchain-memory-chat/23733 --------- Signed-off-by: Oleg Ivaniv <me@olegivaniv.com> Co-authored-by: Oleg Ivaniv <me@olegivaniv.com> Co-authored-by: Val <68596159+valya@users.noreply.github.com> Co-authored-by: Alex Grozav <alex@grozav.com> Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in> Co-authored-by: Deborah <deborah@starfallprojects.co.uk> Co-authored-by: Jesper Bylund <mail@jesperbylund.com> Co-authored-by: Jon <jonathan.bennetts@gmail.com> Co-authored-by: Michael Kret <88898367+michael-radency@users.noreply.github.com> Co-authored-by: Giulio Andreini <andreini@netseven.it> Co-authored-by: Mason Geloso <Mason.geloso@gmail.com> Co-authored-by: Mason Geloso <hone@Masons-Mac-mini.local> Co-authored-by: Mutasem Aldmour <mutasem@n8n.io>
2025-12-17 01:56:46 +00:00 · 2023-11-29 12:13:55 +01:00
parent dbfd617ace
commit 87def60979
243 changed files with 21526 additions and 321 deletions
--- a/packages/@n8n/nodes-langchain/nodes/output_parser/OutputParserAutofixing/OutputParserAutofixing.node.ts
+++ b/packages/@n8n/nodes-langchain/nodes/output_parser/OutputParserAutofixing/OutputParserAutofixing.node.ts
@@ -0,0 +1,86 @@
+/* eslint-disable n8n-nodes-base/node-dirname-against-convention */
+import {
+	NodeConnectionType,
+	type IExecuteFunctions,
+	type INodeType,
+	type INodeTypeDescription,
+	type SupplyData,
+} from 'n8n-workflow';
+import { OutputFixingParser } from 'langchain/output_parsers';
+import type { BaseOutputParser } from 'langchain/schema/output_parser';
+import type { BaseLanguageModel } from 'langchain/base_language';
+import { logWrapper } from '../../../utils/logWrapper';
+import { getConnectionHintNoticeField } from '../../../utils/sharedFields';
+
+export class OutputParserAutofixing implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Auto-fixing Output Parser',
+		name: 'outputParserAutofixing',
+		icon: 'fa:tools',
+		group: ['transform'],
+		version: 1,
+		description: 'Automatically fix the output if it is not in the correct format',
+		defaults: {
+			name: 'Auto-fixing Output Parser',
+		},
+
+		codex: {
+			categories: ['AI'],
+			subcategories: {
+				AI: ['Output Parsers'],
+			},
+			resources: {
+				primaryDocumentation: [
+					{
+						url: 'https://docs.n8n.io/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.outputparserautofixing/',
+					},
+				],
+			},
+		},
+		// eslint-disable-next-line n8n-nodes-base/node-class-description-inputs-wrong-regular-node
+		inputs: [
+			{
+				displayName: 'Model',
+				maxConnections: 1,
+				type: NodeConnectionType.AiLanguageModel,
+				required: true,
+			},
+			{
+				displayName: 'Output Parser',
+				maxConnections: 1,
+				required: true,
+				type: NodeConnectionType.AiOutputParser,
+			},
+		],
+		// eslint-disable-next-line n8n-nodes-base/node-class-description-outputs-wrong
+		outputs: [NodeConnectionType.AiOutputParser],
+		outputNames: ['Output Parser'],
+		properties: [
+			{
+				displayName:
+					'This node wraps another output parser. If the first one fails it calls an LLM to fix the format',
+				name: 'info',
+				type: 'notice',
+				default: '',
+			},
+			getConnectionHintNoticeField([NodeConnectionType.AiChain, NodeConnectionType.AiAgent]),
+		],
+	};
+
+	async supplyData(this: IExecuteFunctions, itemIndex: number): Promise<SupplyData> {
+		const model = (await this.getInputConnectionData(
+			NodeConnectionType.AiLanguageModel,
+			itemIndex,
+		)) as BaseLanguageModel;
+		const outputParser = (await this.getInputConnectionData(
+			NodeConnectionType.AiOutputParser,
+			itemIndex,
+		)) as BaseOutputParser;
+
+		const parser = OutputFixingParser.fromLLM(model, outputParser);
+
+		return {
+			response: logWrapper(parser, this),
+		};
+	}
+}