feat(editor): Improve how we show default Agent prompt and Memory session parameters (#11491)

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

@@ -36,6 +36,7 @@ import {
 	getCustomErrorMessage as getCustomOpenAiErrorMessage,
 	isOpenAiError,
 } from '../../vendors/OpenAi/helpers/error-handling';
+import { promptTypeOptions, textFromPreviousNode } from '../../../utils/descriptions';
 
 interface MessagesTemplate {
 	type: string;
@@ -253,7 +254,7 @@ export class ChainLlm implements INodeType {
 		name: 'chainLlm',
 		icon: 'fa:link',
 		group: ['transform'],
-		version: [1, 1.1, 1.2, 1.3, 1.4],
+		version: [1, 1.1, 1.2, 1.3, 1.4, 1.5],
 		description: 'A simple chain to prompt a large language model',
 		defaults: {
 			name: 'Basic LLM Chain',
@@ -315,30 +316,16 @@ export class ChainLlm implements INodeType {
 				},
 			},
 			{
-				displayName: 'Prompt',
-				name: 'promptType',
-				type: 'options',
-				options: [
-					{
-						// eslint-disable-next-line n8n-nodes-base/node-param-display-name-miscased
-						name: 'Take from previous node automatically',
-						value: 'auto',
-						description: 'Looks for an input field called chatInput',
-					},
-					{
-						// eslint-disable-next-line n8n-nodes-base/node-param-display-name-miscased
-						name: 'Define below',
-						value: 'define',
-						description:
-							'Use an expression to reference data in previous nodes or enter static text',
-					},
-				],
+				...promptTypeOptions,
 				displayOptions: {
 					hide: {
 						'@version': [1, 1.1, 1.2, 1.3],
 					},
 				},
-				default: 'auto',
+			},
+			{
+				...textFromPreviousNode,
+				displayOptions: { show: { promptType: ['auto'], '@version': [{ _cnd: { gte: 1.5 } }] } },
 			},
 			{
 				displayName: 'Text',