Add FileName in FileCitationMessageAnnotation

api/OpenAI.net8.0.cs

@@ -5066,8 +5066,9 @@ public class CustomMcpToolCallApprovalPolicy : IJsonModel<CustomMcpToolCallAppro
     }
     [Experimental("OPENAI001")]
     public class FileCitationMessageAnnotation : ResponseMessageAnnotation, IJsonModel<FileCitationMessageAnnotation>, IPersistableModel<FileCitationMessageAnnotation> {
-        public FileCitationMessageAnnotation(string fileId, int index);
+        public FileCitationMessageAnnotation(string fileId, int index, string filename);
         public string FileId { get; set; }
+        public string Filename { get; set; }
         public int Index { get; set; }
         protected override ResponseMessageAnnotation JsonModelCreateCore(ref Utf8JsonReader reader, ModelReaderWriterOptions options);
         protected override void JsonModelWriteCore(Utf8JsonWriter writer, ModelReaderWriterOptions options);

api/OpenAI.netstandard2.0.cs

@@ -4425,8 +4425,9 @@ public class CustomMcpToolCallApprovalPolicy : IJsonModel<CustomMcpToolCallAppro
         protected virtual BinaryData PersistableModelWriteCore(ModelReaderWriterOptions options);
     }
     public class FileCitationMessageAnnotation : ResponseMessageAnnotation, IJsonModel<FileCitationMessageAnnotation>, IPersistableModel<FileCitationMessageAnnotation> {
-        public FileCitationMessageAnnotation(string fileId, int index);
+        public FileCitationMessageAnnotation(string fileId, int index, string filename);
         public string FileId { get; set; }
+        public string Filename { get; set; }
         public int Index { get; set; }
         protected override ResponseMessageAnnotation JsonModelCreateCore(ref Utf8JsonReader reader, ModelReaderWriterOptions options);
         protected override void JsonModelWriteCore(Utf8JsonWriter writer, ModelReaderWriterOptions options);

specification/base/typespec/responses/models.tsp

@@ -1064,6 +1064,9 @@ model AnnotationFileCitation extends Annotation {
 
   /** The index of the file in the list of files. */
   index: int32;
+
+  /** The filename of the file cited. */
+  filename: string;
 }
 
 // Tool customization (apply_discriminator): Apply discriminated base type, rename for consistency and clarity

src/Generated/Models/Responses/FileCitationMessageAnnotation.Serialization.cs

@@ -12,7 +12,7 @@ namespace OpenAI.Responses
 {
     public partial class FileCitationMessageAnnotation : ResponseMessageAnnotation, IJsonModel<FileCitationMessageAnnotation>
     {
-        internal FileCitationMessageAnnotation() : this(ResponseMessageAnnotationKind.FileCitation, default, null, default)
+        internal FileCitationMessageAnnotation() : this(ResponseMessageAnnotationKind.FileCitation, default, null, default, null)
         {
         }
 
@@ -50,6 +50,11 @@ protected override void JsonModelWriteCore(Utf8JsonWriter writer, ModelReaderWri
                 writer.WritePropertyName("index"u8);
                 writer.WriteNumberValue(Index);
             }
+            if (!Patch.Contains("$.filename"u8))
+            {
+                writer.WritePropertyName("filename"u8);
+                writer.WriteStringValue(Filename);
+            }
 
             Patch.WriteTo(writer);
 #pragma warning restore SCME0001 // Type is for evaluation purposes only and is subject to change or removal in future updates.
@@ -80,6 +85,7 @@ internal static FileCitationMessageAnnotation DeserializeFileCitationMessageAnno
 #pragma warning restore SCME0001 // Type is for evaluation purposes only and is subject to change or removal in future updates.
             string fileId = default;
             int index = default;
+            string filename = default;
             foreach (var prop in element.EnumerateObject())
             {
                 if (prop.NameEquals("type"u8))
@@ -97,9 +103,14 @@ internal static FileCitationMessageAnnotation DeserializeFileCitationMessageAnno
                     index = prop.Value.GetInt32();
                     continue;
                 }
+                if (prop.NameEquals("filename"u8))
+                {
+                    filename = prop.Value.GetString();
+                    continue;
+                }
                 patch.Set([.. "$."u8, .. Encoding.UTF8.GetBytes(prop.Name)], prop.Value.GetUtf8Bytes());
             }
-            return new FileCitationMessageAnnotation(kind, patch, fileId, index);
+            return new FileCitationMessageAnnotation(kind, patch, fileId, index, filename);
         }
 
         BinaryData IPersistableModel<FileCitationMessageAnnotation>.Write(ModelReaderWriterOptions options) => PersistableModelWriteCore(options);

src/Generated/Models/Responses/FileCitationMessageAnnotation.cs

@@ -11,24 +11,29 @@ namespace OpenAI.Responses
     [Experimental("OPENAI001")]
     public partial class FileCitationMessageAnnotation : ResponseMessageAnnotation
     {
-        public FileCitationMessageAnnotation(string fileId, int index) : base(ResponseMessageAnnotationKind.FileCitation)
+        public FileCitationMessageAnnotation(string fileId, int index, string filename) : base(ResponseMessageAnnotationKind.FileCitation)
         {
             Argument.AssertNotNull(fileId, nameof(fileId));
+            Argument.AssertNotNull(filename, nameof(filename));
 
             FileId = fileId;
             Index = index;
+            Filename = filename;
         }
 
 #pragma warning disable SCME0001 // Type is for evaluation purposes only and is subject to change or removal in future updates.
-        internal FileCitationMessageAnnotation(ResponseMessageAnnotationKind kind, in JsonPatch patch, string fileId, int index) : base(kind, patch)
+        internal FileCitationMessageAnnotation(ResponseMessageAnnotationKind kind, in JsonPatch patch, string fileId, int index, string filename) : base(kind, patch)
         {
             FileId = fileId;
             Index = index;
+            Filename = filename;
         }
 #pragma warning restore SCME0001 // Type is for evaluation purposes only and is subject to change or removal in future updates.
 
         public string FileId { get; set; }
 
         public int Index { get; set; }
+
+        public string Filename { get; set; }
     }
 }

src/Generated/OpenAIModelFactory.cs

@@ -584,9 +584,9 @@ public static ResponseMessageAnnotation ResponseMessageAnnotation(string kind =
             return new InternalUnknownAnnotation(kind.ToResponseMessageAnnotationKind(), default);
         }
 
-        public static FileCitationMessageAnnotation FileCitationMessageAnnotation(string fileId = default, int index = default)
+        public static FileCitationMessageAnnotation FileCitationMessageAnnotation(string fileId = default, int index = default, string filename = default)
         {
-            return new FileCitationMessageAnnotation(ResponseMessageAnnotationKind.FileCitation, default, fileId, index);
+            return new FileCitationMessageAnnotation(ResponseMessageAnnotationKind.FileCitation, default, fileId, index, filename);
         }
 
         public static UriCitationMessageAnnotation UriCitationMessageAnnotation(Uri uri = default, int startIndex = default, int endIndex = default, string title = default)

tests/Responses/ResponsesToolTests.cs

@@ -394,6 +394,7 @@ public async Task FileSearch()
         Assert.That(messageContentPart.OutputTextAnnotations, Is.Not.Null.And.Not.Empty);
         FileCitationMessageAnnotation annotation = messageContentPart.OutputTextAnnotations[0] as FileCitationMessageAnnotation;
         Assert.That(annotation.FileId, Is.EqualTo(testFile.Id));
+        Assert.That(annotation.Filename, Is.EqualTo(testFile.Filename));
         Assert.That(annotation.Index, Is.GreaterThan(0));
 
         await foreach (ResponseItem inputItem in client.GetResponseInputItemsAsync(response.Id))