Add polyglot interaction service APIs

src/Aspire.Hosting.CodeGeneration.Java/AtsJavaCodeGenerator.cs

@@ -1442,8 +1442,8 @@ private void GenerateOptionsOverloads(
     {
         var requiredParameterList = string.Join(", ", requiredParameters.Select(parameter => $"{MapParameterToJava(parameter)} {ToCamelCase(parameter.Name)}"));
         var publicParameterList = string.IsNullOrEmpty(requiredParameterList)
-            ? $"{optionsClassName} options"
-            : $"{requiredParameterList}, {optionsClassName} options";
+            ? $"{optionsClassName} optionsBag"
+            : $"{requiredParameterList}, {optionsClassName} optionsBag";
 
         if (!string.IsNullOrEmpty(capability.Description))
         {
@@ -1454,7 +1454,7 @@ private void GenerateOptionsOverloads(
         foreach (var parameter in optionalParameters)
         {
             var paramName = ToCamelCase(parameter.Name);
-            WriteLine($"        var {paramName} = options == null ? null : options.{GetOptionGetterName(parameter)}();");
+            WriteLine($"        var {paramName} = optionsBag == null ? null : optionsBag.{GetOptionGetterName(parameter)}();");
         }
 
         var implementationArguments = requiredParameters

src/Aspire.Hosting.CodeGeneration.TypeScript/AtsTypeScriptCodeGenerator.cs

@@ -183,22 +183,22 @@ private string MapTypeRefToTypeScript(AtsTypeRef? typeRef)
         // ReferenceExpression is a value type defined in base.mts, not a handle-based wrapper
         if (typeRef.TypeId == AtsConstants.ReferenceExpressionTypeId)
         {
-            return GetReferenceExpressionInterfaceName();
+            return ApplyNullableType(typeRef, GetReferenceExpressionInterfaceName());
         }
 
         if (typeRef.TypeId == InputTypeTypeId)
         {
-            return GetInputTypeEnumName();
+            return ApplyNullableType(typeRef, GetInputTypeEnumName());
         }
 
         if (typeRef.TypeId == InteractionInputTypeId)
         {
-            return GetInteractionInputInterfaceName();
+            return ApplyNullableType(typeRef, GetInteractionInputInterfaceName());
         }
 
         if (typeRef.TypeId == InteractionInputCollectionTypeId)
         {
-            return GetInteractionInputCollectionClassName();
+            return ApplyNullableType(typeRef, GetInteractionInputCollectionClassName());
         }
 
         // Check for wrapper class first (handles custom types like resource builders)
@@ -228,7 +228,7 @@ private string MapTypeRefToTypeScript(AtsTypeRef? typeRef)
 
     private static string ApplyNullableType(AtsTypeRef typeRef, string mappedType)
     {
-        if (typeRef.IsNullable != true || typeRef.Category is not (AtsTypeCategory.Primitive or AtsTypeCategory.Enum))
+        if (typeRef.IsNullable != true)
         {
             return mappedType;
         }
@@ -247,9 +247,9 @@ private string MapDtoPropertyTypeToTypeScript(AtsTypeRef? typeRef)
 
         return typeRef.Category switch
         {
-            AtsTypeCategory.Array or AtsTypeCategory.List => $"{MapDtoPropertyTypeToTypeScript(typeRef.ElementType)}[]",
-            AtsTypeCategory.Dict => $"Record<{MapDtoPropertyTypeToTypeScript(typeRef.KeyType)}, {MapDtoPropertyTypeToTypeScript(typeRef.ValueType)}>",
-            AtsTypeCategory.Union => MapDtoUnionTypeToTypeScript(typeRef),
+            AtsTypeCategory.Array or AtsTypeCategory.List => ApplyNullableType(typeRef, $"{MapDtoPropertyTypeToTypeScript(typeRef.ElementType)}[]"),
+            AtsTypeCategory.Dict => ApplyNullableType(typeRef, $"Record<{MapDtoPropertyTypeToTypeScript(typeRef.KeyType)}, {MapDtoPropertyTypeToTypeScript(typeRef.ValueType)}>"),
+            AtsTypeCategory.Union => ApplyNullableType(typeRef, MapDtoUnionTypeToTypeScript(typeRef)),
             _ => MapTypeRefToTypeScript(typeRef)
         };
     }

src/Aspire.Hosting/ApplicationModel/ResourceCommandAnnotation.cs

@@ -432,7 +432,6 @@ public sealed class ExecuteCommandContext
     /// <summary>
     /// The service provider.
     /// </summary>
-    [AspireExportIgnore(Reason = "IServiceProvider is not usable from polyglot command callbacks.")]
     public required IServiceProvider ServiceProvider { get; init; }
 
     /// <summary>

src/Aspire.Hosting/Ats/AtsTypeMappings.cs

@@ -1,3 +1,4 @@
+#pragma warning disable ASPIREINTERACTION001
 #pragma warning disable ASPIREPIPELINES001
 
 // Licensed to the .NET Foundation under one or more agreements.
@@ -53,6 +54,7 @@
 
 // Service types
 [assembly: AspireExport(typeof(IServiceProvider))]
+[assembly: AspireExport(typeof(IInteractionService))]
 [assembly: AspireExport(typeof(ResourceNotificationService))]
 [assembly: AspireExport(typeof(ResourceLoggerService))]
 [assembly: AspireExport(typeof(ResourceCommandService))]