Improve GitLab Duo gateway compatibility

sdk/cliproxy/service_gitlab_models_test.go

@@ -46,3 +46,41 @@ func TestRegisterModelsForAuth_GitLabUsesDiscoveredModels(t *testing.T) {
 		t.Fatalf("expected gitlab-duo and discovered model, got %+v", models)
 	}
 }
+
+func TestRegisterModelsForAuth_GitLabIncludesAgenticCatalog(t *testing.T) {
+	service := &Service{cfg: &config.Config{}}
+	auth := &coreauth.Auth{
+		ID:       "gitlab-agentic-auth.json",
+		Provider: "gitlab",
+		Status:   coreauth.StatusActive,
+	}
+
+	reg := registry.GetGlobalRegistry()
+	reg.UnregisterClient(auth.ID)
+	t.Cleanup(func() { reg.UnregisterClient(auth.ID) })
+
+	service.registerModelsForAuth(auth)
+	models := reg.GetModelsForClient(auth.ID)
+	if len(models) < 5 {
+		t.Fatalf("expected stable alias plus built-in agentic catalog, got %d entries", len(models))
+	}
+
+	required := map[string]bool{
+		"gitlab-duo":           false,
+		"duo-chat-opus-4-6":    false,
+		"duo-chat-haiku-4-5":   false,
+		"duo-chat-sonnet-4-5":  false,
+		"duo-chat-opus-4-5":    false,
+		"duo-chat-gpt-5-codex": false,
+	}
+	for _, model := range models {
+		if _, ok := required[model.ID]; ok {
+			required[model.ID] = true
+		}
+	}
+	for id, seen := range required {
+		if !seen {
+			t.Fatalf("expected built-in GitLab Duo model %q, got %+v", id, models)
+		}
+	}
+}