launch: resave managed integration config when live config drifts (#15776)

cmd/launch/launch.go

@@ -588,7 +588,7 @@ func (c *launcherClient) launchManagedSingleIntegration(ctx context.Context, nam
 		return nil
 	}
 
-	if (current == "" || needsConfigure || req.ModelOverride != "" || target != current) && !savedMatchesModels(saved, []string{target}) {
+	if needsConfigure || req.ModelOverride != "" || (current != "" && target != current) || !savedMatchesModels(saved, []string{target}) {
 		if err := prepareManagedSingleIntegration(name, runner, managed, target); err != nil {
 			return err
 		}

cmd/launch/launch_test.go

@@ -512,6 +512,65 @@ func TestLaunchIntegration_ManagedSingleIntegrationRewritesWhenSavedDiffers(t *t
 	}
 }
 
+func TestLaunchIntegration_ManagedSingleIntegrationRewritesWhenLiveConfigDrifts(t *testing.T) {
+	tmpDir := t.TempDir()
+	setLaunchTestHome(t, tmpDir)
+	withInteractiveSession(t, true)
+	withLauncherHooks(t)
+
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/api/tags":
+			fmt.Fprint(w, `{"models":[{"name":"gemma4"},{"name":"qwen3:8b"}]}`)
+		case "/api/show":
+			fmt.Fprint(w, `{"model_info":{"general.context_length":131072}}`)
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer srv.Close()
+	t.Setenv("OLLAMA_HOST", srv.URL)
+
+	if err := config.SaveIntegration("stubmanaged", []string{"gemma4"}); err != nil {
+		t.Fatalf("failed to save managed integration config: %v", err)
+	}
+
+	runner := &launcherManagedRunner{
+		currentModel: "qwen3:8b",
+	}
+	withIntegrationOverride(t, "stubmanaged", runner)
+
+	DefaultSingleSelector = func(title string, items []ModelItem, current string) (string, error) {
+		t.Fatal("selector should not be called when live config already provides the target")
+		return "", nil
+	}
+	DefaultConfirmPrompt = func(prompt string, options ConfirmOptions) (bool, error) {
+		return true, nil
+	}
+
+	if err := LaunchIntegration(context.Background(), IntegrationLaunchRequest{Name: "stubmanaged"}); err != nil {
+		t.Fatalf("LaunchIntegration returned error: %v", err)
+	}
+
+	if diff := compareStrings(runner.configured, []string{"qwen3:8b"}); diff != "" {
+		t.Fatalf("expected Configure to reconcile stale saved config to live target: %s", diff)
+	}
+	if runner.refreshCalls != 1 {
+		t.Fatalf("expected runtime refresh once after drift reconciliation, got %d", runner.refreshCalls)
+	}
+	if runner.ranModel != "qwen3:8b" {
+		t.Fatalf("expected launch to run live configured model, got %q", runner.ranModel)
+	}
+
+	saved, err := config.LoadIntegration("stubmanaged")
+	if err != nil {
+		t.Fatalf("failed to reload managed integration config: %v", err)
+	}
+	if diff := compareStrings(saved.Models, []string{"qwen3:8b"}); diff != "" {
+		t.Fatalf("saved models mismatch after drift reconciliation: %s", diff)
+	}
+}
+
 func TestLaunchIntegration_ManagedSingleIntegrationStopsWhenRuntimeRefreshFails(t *testing.T) {
 	tmpDir := t.TempDir()
 	setLaunchTestHome(t, tmpDir)