Remote: Disallow saving workspace locally. Fixes #106990

src/vs/workbench/services/dialogs/browser/abstractFileDialogService.ts

@@ -78,7 +78,7 @@ export abstract class AbstractFileDialogService implements IFileDialogService {
 		// Check for current workspace config file first...
 		if (this.contextService.getWorkbenchState() === WorkbenchState.WORKSPACE) {
 			const configuration = this.contextService.getWorkspace().configuration;
-			if (configuration && !isUntitledWorkspace(configuration, this.environmentService)) {
+			if (configuration && configuration.scheme === schemeFilter && !isUntitledWorkspace(configuration, this.environmentService)) {
 				return resources.dirname(configuration) || undefined;
 			}
 		}

src/vs/workbench/services/workspaces/browser/abstractWorkspaceEditingService.ts

@@ -52,7 +52,8 @@ export abstract class AbstractWorkspaceEditingService implements IWorkspaceEditi
 			saveLabel: mnemonicButtonLabel(nls.localize('save', "Save")),
 			title: nls.localize('saveWorkspace', "Save Workspace"),
 			filters: WORKSPACE_FILTER,
-			defaultUri: this.fileDialogService.defaultWorkspacePath()
+			defaultUri: this.fileDialogService.defaultWorkspacePath(),
+			availableFileSystems: this.environmentService.configuration.remoteAuthority ? [Schemas.vscodeRemote] : undefined
 		});
 
 		if (!workspacePath) {