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packages/@n8n/nodes-langchain/nodes/rerankers/RerankerCohere/RerankerCohere.node.ts

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+import { CohereRerank } from '@langchain/cohere';
+import {
+	NodeConnectionTypes,
+	type INodeType,
+	type INodeTypeDescription,
+	type ISupplyDataFunctions,
+	type SupplyData,
+} from 'n8n-workflow';
+
+import { logWrapper } from '@n8n/ai-utilities';
+
+export class RerankerCohere implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Reranker Cohere',
+		name: 'rerankerCohere',
+		icon: { light: 'file:cohere.svg', dark: 'file:cohere.dark.svg' },
+		group: ['transform'],
+		version: 1,
+		description:
+			'Use Cohere Reranker to reorder documents after retrieval from a vector store by relevance to the given query.',
+		defaults: {
+			name: 'Reranker Cohere',
+		},
+		requestDefaults: {
+			ignoreHttpStatusErrors: true,
+			baseURL: '={{ $credentials.host }}',
+		},
+		credentials: [
+			{
+				name: 'cohereApi',
+				required: true,
+			},
+		],
+		codex: {
+			categories: ['AI'],
+			subcategories: {
+				AI: ['Rerankers'],
+			},
+			resources: {
+				primaryDocumentation: [
+					{
+						url: 'https://docs.n8n.io/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.rerankercohere/',
+					},
+				],
+			},
+		},
+		inputs: [],
+		outputs: [NodeConnectionTypes.AiReranker],
+		outputNames: ['Reranker'],
+		properties: [
+			{
+				displayName: 'Model',
+				name: 'modelName',
+				type: 'options',
+				description:
+					'The model that should be used to rerank the documents. <a href="https://docs.cohere.com/docs/models">Learn more</a>.',
+				default: 'rerank-v3.5',
+				options: [
+					{
+						name: 'rerank-v3.5',
+						value: 'rerank-v3.5',
+					},
+					{
+						name: 'rerank-english-v3.0',
+						value: 'rerank-english-v3.0',
+					},
+					{
+						name: 'rerank-multilingual-v3.0',
+						value: 'rerank-multilingual-v3.0',
+					},
+				],
+			},
+			{
+				displayName: 'Top N',
+				name: 'topN',
+				type: 'number',
+				description: 'The maximum number of documents to return after reranking',
+				default: 3,
+			},
+		],
+	};
+
+	async supplyData(this: ISupplyDataFunctions, itemIndex: number): Promise<SupplyData> {
+		this.logger.debug('Supply data for reranking Cohere');
+		const modelName = this.getNodeParameter('modelName', itemIndex, 'rerank-v3.5') as string;
+		const topN = this.getNodeParameter('topN', itemIndex, 3) as number;
+		const credentials = await this.getCredentials<{ apiKey: string }>('cohereApi');
+
+		const reranker = new CohereRerank({
+			apiKey: credentials.apiKey,
+			model: modelName,
+			topN,
+		});
+
+		return {
+			response: logWrapper(reranker, this),
+		};
+	}
+}