fix(go): skip empty request structs when wrapper has no user-facing fields

generators/go/internal/generator/generator.go

@@ -1563,12 +1563,12 @@ func generatedPackagesFromIR(ir *fernir.IntermediateRepresentation) map[string]s
 }
 
 // shouldSkipRequestType returns true if the request type should not be generated.
-func shouldSkipRequestType(irEndpoint *fernir.HttpEndpoint, inlinePathParameters bool, inlineFileProperties bool) bool {
+func shouldSkipRequestType(irEndpoint *fernir.HttpEndpoint, serviceHeaders []*fernir.HttpHeader, inlinePathParameters bool, inlineFileProperties bool) bool {
 	if irEndpoint.SdkRequest == nil || irEndpoint.SdkRequest.Shape == nil || irEndpoint.SdkRequest.Shape.Wrapper == nil {
 		// This endpoint doesn't have any in-lined request types that need to be generated.
 		return true
 	}
-	return !needsRequestParameter(irEndpoint, inlinePathParameters, inlineFileProperties)
+	return !needsRequestParameter(irEndpoint, serviceHeaders, inlinePathParameters, inlineFileProperties)
 }
 
 // fileUploadHasBodyProperties returns true if the file upload request has at least
@@ -1652,7 +1652,7 @@ func fileInfoToTypes(
 	for _, irService := range irServices {
 		subpackageFileInfo := fileInfoForType(rootPackageName, irService.Name.FernFilepath)
 		for _, irEndpoint := range irService.Endpoints {
-			if shouldSkipRequestType(irEndpoint, inlinePathParameters, inlineFileProperties) {
+			if shouldSkipRequestType(irEndpoint, irService.Headers, inlinePathParameters, inlineFileProperties) {
 				continue
 			}
 

generators/go/internal/generator/sdk.go

@@ -1773,6 +1773,7 @@ func (f *fileWriter) WriteClient(
 		f,
 		fernFilepath,
 		irEndpoints,
+		serviceHeaders,
 		rootClientInstantiation,
 	)
 }
@@ -2047,6 +2048,7 @@ func NewGeneratedClient(
 	f *fileWriter,
 	fernFilepath *common.FernFilepath,
 	endpoints []*ir.HttpEndpoint,
+	serviceHeaders []*ir.HttpHeader,
 	rootClientInstantiation *ast.AssignStmt,
 ) (*GeneratedClient, error) {
 	var generatedEndpoints []*GeneratedEndpoint
@@ -2069,6 +2071,7 @@ func NewGeneratedClient(
 				fernFilepath,
 				rootClientInstantiation,
 				endpoint,
+				serviceHeaders,
 				example,
 			),
 		)
@@ -2084,6 +2087,7 @@ func newGeneratedEndpoint(
 	fernFilepath *common.FernFilepath,
 	rootClientInstantiation *ast.AssignStmt,
 	endpoint *ir.HttpEndpoint,
+	serviceHeaders []*ir.HttpHeader,
 	example *ir.ExampleEndpointCall,
 ) *GeneratedEndpoint {
 	return &GeneratedEndpoint{
@@ -2093,6 +2097,7 @@ func newGeneratedEndpoint(
 			fernFilepath,
 			rootClientInstantiation,
 			endpoint,
+			serviceHeaders,
 			example,
 		),
 	}
@@ -2141,13 +2146,15 @@ func newEndpointSnippet(
 	fernFilepath *common.FernFilepath,
 	rootClientInstantiation *ast.AssignStmt,
 	endpoint *ir.HttpEndpoint,
+	serviceHeaders []*ir.HttpHeader,
 	example *ir.ExampleEndpointCall,
 ) *ast.Block {
 	methodName := getEndpointMethodName(fernFilepath, endpoint)
 	parameters := getEndpointParameters(
 		f,
 		fernFilepath,
 		endpoint,
+		serviceHeaders,
 		example,
 	)
 	call := &ast.CallExpr{
@@ -2207,6 +2214,7 @@ func getEndpointParameters(
 	f *fileWriter,
 	fernFilepath *common.FernFilepath,
 	endpoint *ir.HttpEndpoint,
+	serviceHeaders []*ir.HttpHeader,
 	example *ir.ExampleEndpointCall,
 ) []ast.Expr {
 	var fields []*ast.Field
@@ -2279,7 +2287,7 @@ func getEndpointParameters(
 		)
 	}
 
-	if !shouldSkipRequestType(endpoint, f.inlinePathParameters, f.inlineFileProperties) {
+	if !shouldSkipRequestType(endpoint, serviceHeaders, f.inlinePathParameters, f.inlineFileProperties) {
 		fields = append(
 			fields,
 			exampleRequestBodyToFields(f, endpoint, example.Request)...,
@@ -2646,7 +2654,7 @@ func (f *fileWriter) endpointFromIR(
 	)
 
 	if irEndpoint.SdkRequest != nil {
-		if needsRequestParameter(irEndpoint, inlinePathParameters, inlineFileProperties) {
+		if needsRequestParameter(irEndpoint, serviceHeaders, inlinePathParameters, inlineFileProperties) {
 			var requestType string
 			requestParameterName = irEndpoint.SdkRequest.RequestParameterName.CamelCase.SafeName
 			if requestBody := irEndpoint.SdkRequest.Shape.JustRequestBody; requestBody != nil {
@@ -3867,6 +3875,7 @@ func typeReferenceFromStreamingResponse(
 // function signature.
 func needsRequestParameter(
 	endpoint *ir.HttpEndpoint,
+	serviceHeaders []*ir.HttpHeader,
 	inlinePathParameters bool,
 	inlineFileProperties bool,
 ) bool {
@@ -3882,6 +3891,9 @@ func needsRequestParameter(
 	if len(endpoint.Headers) > 0 {
 		return true
 	}
+	if len(serviceHeaders) > 0 {
+		return true
+	}
 	if endpoint.RequestBody != nil {
 		return endpoint.RequestBody.FileUpload == nil ||
 			fileUploadHasBodyProperties(endpoint.RequestBody.FileUpload) ||
@@ -3891,7 +3903,7 @@ func needsRequestParameter(
 	if onlyPathParameters != nil && *onlyPathParameters {
 		return false
 	}
-	return true
+	return false
 }
 
 // includePathParametersInWrappedRequest returns true if the endpoint's request should

generators/go/sdk/versions.yml

@@ -1,4 +1,17 @@
 # yaml-language-server: $schema=../../../fern-versions-yml.schema.json
+- version: 1.23.8
+  changelogEntry:
+    - summary: |
+        Fix empty request structs being generated for endpoints where the SDK request wrapper
+        has no user-facing fields. This occurred when a wrapper was created (e.g., due to service
+        headers) but all fields were handled globally via RequestOptions, resulting in an empty
+        struct parameter in the method signature. The fix adds service header awareness to
+        needsRequestParameter and changes the default behavior to not generate a request parameter
+        when no visible fields exist.
+      type: fix
+  createdAt: "2026-02-13"
+  irVersion: 61
+
 - version: 1.23.7
   changelogEntry:
     - summary: |