OpenApiSchemaReference allows Description alongside $ref producing non-spec-compliant output in OAS 3.0 #2745

using System;
using System.IO;
using Microsoft.OpenApi.Models;
using Microsoft.OpenApi.Writers;

class Program
{
    static void Main()
    {
        var document = new OpenApiDocument
        {
            Info = new OpenApiInfo
            {
                Title = "Ref Description Test",
                Version = "1.0.0"
            },

            Components = new OpenApiComponents
            {
                Schemas =
                {
                    ["Pet"] = new OpenApiSchema
                    {
                        Type = "object",
                        Properties =
                        {
                            ["name"] = new OpenApiSchema { Type = "string" }
                        }
                    }
                }
            },

            Paths = new OpenApiPaths
            {
                ["/test"] = new OpenApiPathItem
                {
                    Operations =
                    {
                        [OperationType.Get] = new OpenApiOperation
                        {
                            Responses =
                            {
                                ["200"] = new OpenApiResponse
                                {
                                    Description = "OK",
                                    Content =
                                    {
                                        ["application/json"] = new OpenApiMediaType
                                        {
                                            Schema = new OpenApiSchemaReference("Pet")
                                            {
                                                Description = "Local description"
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        };

        using var stream = new MemoryStream();
        using var writer = new OpenApiJsonWriter(new StreamWriter(stream));

        document.SerializeAsV3(writer);
        writer.Flush();

        stream.Position = 0;
        Console.WriteLine(new StreamReader(stream).ReadToEnd());
    }
}