feat(Structured Output Parser Node): Add notice about $refs support in JSON schema (#15973)

packages/@n8n/nodes-langchain/nodes/output_parser/OutputParserStructured/OutputParserStructured.node.ts

@@ -120,18 +120,6 @@ export class OutputParserStructured implements INodeType {
 					},
 				},
 			},
-			{
-				displayName:
-					'The schema has to be defined in the <a target="_blank" href="https://json-schema.org/">JSON Schema</a> format. Look at <a target="_blank" href="https://json-schema.org/learn/miscellaneous-examples.html">this</a> page for examples.',
-				name: 'notice',
-				type: 'notice',
-				default: '',
-				displayOptions: {
-					hide: {
-						schemaType: ['fromJson'],
-					},
-				},
-			},
 			{
 				displayName: 'Auto-Fix Format',
 				description:
@@ -172,6 +160,17 @@ export class OutputParserStructured implements INodeType {
 					'Prompt template used for fixing the output. Uses placeholders: "{instructions}" for parsing rules, "{completion}" for the failed attempt, and "{error}" for the validation error message.',
 			},
 		],
+		hints: [
+			{
+				message:
+					'Fields that use $refs might have the wrong type, since this syntax is not currently supported',
+				type: 'warning',
+				location: 'outputPane',
+				whenToDisplay: 'afterExecution',
+				displayCondition:
+					'={{ $parameter["schemaType"] === "manual" && $parameter["inputSchema"]?.includes("$ref") }}',
+			},
+		],
 	};
 
 	async supplyData(this: ISupplyDataFunctions, itemIndex: number): Promise<SupplyData> {