fix(backend): remove initialPrompt skip that blocked display name fallback

components/backend/handlers/display_name.go

@@ -80,7 +80,7 @@ func ValidateDisplayName(name string) string {
 // - Gracefully handles session deletion during generation (checks IsNotFound)
 // - No cancellation mechanism exists; goroutine runs to completion or timeout
 // - Safe for backend restarts: orphaned goroutines will timeout naturally
-func GenerateDisplayNameAsync(projectName, sessionName, userMessage string, sessionCtx SessionContext) {
+var GenerateDisplayNameAsync = func(projectName, sessionName, userMessage string, sessionCtx SessionContext) {
 	go func() {
 		defer func() {
 			if r := recover(); r != nil {

components/backend/handlers/sessions.go

@@ -1203,9 +1203,8 @@ func CreateSession(c *gin.Context) {
 	// This ensures consistent behavior whether sessions are created via API or kubectl.
 
 	// Trigger async display name generation when initialPrompt is provided
-	// but no explicit displayName was set. The AG-UI proxy skips the
-	// initialPrompt message, so sessions created with only an initialPrompt
-	// (e.g., from the new-session page) would never get a generated name.
+	// but no explicit displayName was set. The AG-UI proxy also generates
+	// on the first /agui/run message as a fallback if this call fails.
 	if strings.TrimSpace(req.InitialPrompt) != "" && strings.TrimSpace(req.DisplayName) == "" {
 		spec, ok := created.Object["spec"].(map[string]interface{})
 		if ok {

components/backend/websocket/agui_proxy.go

@@ -1002,12 +1002,6 @@ func triggerDisplayNameGenerationIfNeeded(projectName, sessionName string, messa
 		return
 	}
 
-	// Skip if this message is the auto-sent initialPrompt
-	initialPrompt, _, _ := unstructured.NestedString(spec, "initialPrompt")
-	if initialPrompt != "" && strings.TrimSpace(userMessage) == strings.TrimSpace(initialPrompt) {
-		return
-	}
-
 	if !handlers.ShouldGenerateDisplayName(spec) {
 		return
 	}

components/backend/websocket/agui_proxy_test.go

@@ -1,15 +1,21 @@
 package websocket
 
 import (
+	"context"
 	"fmt"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 
 	"ambient-code-backend/handlers"
+	"ambient-code-backend/tests/test_utils"
+	"ambient-code-backend/types"
 
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/client-go/dynamic"
 	k8sfake "k8s.io/client-go/kubernetes/fake"
 )
 
@@ -204,3 +210,129 @@ func TestDefaultRunnerPort_Constant(t *testing.T) {
 		t.Errorf("Expected DefaultRunnerPort=8001, got %d", handlers.DefaultRunnerPort)
 	}
 }
+
+// --- triggerDisplayNameGenerationIfNeeded tests (regression for #1561) ---
+
+func setupDisplayNameTest(t *testing.T, spec map[string]interface{}) (cleanup func()) {
+	t.Helper()
+
+	oldDynamic := handlers.DynamicClient
+	oldK8sProjects := handlers.K8sClientProjects
+	oldGVRFunc := handlers.GetAgenticSessionV1Alpha1Resource
+
+	agenticSessionGVR := schema.GroupVersionResource{
+		Group:    "vteam.ambient-code",
+		Version:  "v1alpha1",
+		Resource: "agenticsessions",
+	}
+	handlers.GetAgenticSessionV1Alpha1Resource = func() schema.GroupVersionResource {
+		return agenticSessionGVR
+	}
+
+	fakeClients := test_utils.NewFakeClientSet()
+	handlers.DynamicClient = fakeClients.GetDynamicClient()
+	handlers.K8sClientProjects = fakeClients.GetK8sClient()
+
+	err := test_utils.CreateAgenticSessionInFakeClient(
+		handlers.DynamicClient, "test-project", "test-session", spec,
+	)
+	if err != nil {
+		t.Fatalf("Failed to create test session: %v", err)
+	}
+
+	return func() {
+		handlers.DynamicClient = oldDynamic
+		handlers.K8sClientProjects = oldK8sProjects
+		handlers.GetAgenticSessionV1Alpha1Resource = oldGVRFunc
+	}
+}
+
+func getDisplayName(t *testing.T, dc dynamic.Interface) string {
+	t.Helper()
+	gvr := handlers.GetAgenticSessionV1Alpha1Resource()
+	item, err := dc.Resource(gvr).Namespace("test-project").Get(
+		context.Background(), "test-session", metav1.GetOptions{},
+	)
+	if err != nil {
+		t.Fatalf("Failed to get session: %v", err)
+	}
+	dn, _, _ := unstructured.NestedString(item.Object, "spec", "displayName")
+	return dn
+}
+
+func TestTriggerDisplayName_InitialPromptNotSkipped(t *testing.T) {
+	cleanup := setupDisplayNameTest(t, map[string]interface{}{
+		"initialPrompt": "Help me debug auth",
+	})
+	defer cleanup()
+
+	called := false
+	oldFn := handlers.GenerateDisplayNameAsync
+	handlers.GenerateDisplayNameAsync = func(projectName, sessionName, userMessage string, sessionCtx handlers.SessionContext) {
+		called = true
+	}
+	defer func() { handlers.GenerateDisplayNameAsync = oldFn }()
+
+	msgs := []types.Message{
+		{ID: "msg-1", Role: "user", Content: "Help me debug auth"},
+	}
+
+	triggerDisplayNameGenerationIfNeeded("test-project", "test-session", msgs)
+
+	if !called {
+		t.Error("Expected GenerateDisplayNameAsync to be called for initialPrompt message when displayName is empty")
+	}
+}
+
+func TestTriggerDisplayName_SkipsWhenNameAlreadySet(t *testing.T) {
+	cleanup := setupDisplayNameTest(t, map[string]interface{}{
+		"initialPrompt": "Help me debug auth",
+		"displayName":   "Debug Auth Middleware",
+	})
+	defer cleanup()
+
+	msgs := []types.Message{
+		{ID: "msg-1", Role: "user", Content: "Help me debug auth"},
+	}
+
+	triggerDisplayNameGenerationIfNeeded("test-project", "test-session", msgs)
+
+	// displayName should remain unchanged — ShouldGenerateDisplayName
+	// returns false when displayName is already set.
+	dn := getDisplayName(t, handlers.DynamicClient)
+	if dn != "Debug Auth Middleware" {
+		t.Errorf("Expected displayName to remain %q, got %q", "Debug Auth Middleware", dn)
+	}
+}
+
+func TestTriggerDisplayName_SkipsWhenNoUserMessage(t *testing.T) {
+	cleanup := setupDisplayNameTest(t, map[string]interface{}{
+		"initialPrompt": "Help me debug auth",
+	})
+	defer cleanup()
+
+	// Only assistant messages — no user content to generate from
+	msgs := []types.Message{
+		{ID: "msg-1", Role: "assistant", Content: "I'll help you debug"},
+	}
+
+	triggerDisplayNameGenerationIfNeeded("test-project", "test-session", msgs)
+
+	dn := getDisplayName(t, handlers.DynamicClient)
+	if dn != "" {
+		t.Errorf("Expected empty displayName, got %q", dn)
+	}
+}
+
+func TestTriggerDisplayName_SkipsWhenDynamicClientNil(t *testing.T) {
+	oldDynamic := handlers.DynamicClient
+	handlers.DynamicClient = nil
+	defer func() { handlers.DynamicClient = oldDynamic }()
+
+	msgs := []types.Message{
+		{ID: "msg-1", Role: "user", Content: "Help me debug auth"},
+	}
+
+	// Should return early without panic when DynamicClient is nil
+	triggerDisplayNameGenerationIfNeeded("test-project", "test-session", msgs)
+}