/**
 * Copyright (c) 2026, Salesforce, Inc.,
 * All rights reserved.
 * For full license text, see the LICENSE.txt file
 */
import type { FileCopySchema, InstallationContext } from "./types.js";
/**
 * Install a single npm package and ensure it's saved to package.json.
 * npm output is suppressed by default; shown on verbose or error.
 */
export declare function installPackage(packageName: string, isDev: boolean, uiBundleDir: string, dryRun?: boolean, verbose?: boolean): Promise<void>;
/**
 * Install package dependencies from schema.
 * Merges dependencies into package.json and runs npm install with a spinner.
 */
export declare function installPackageDependencies(schema: FileCopySchema, context: InstallationContext): Promise<void>;
/**
 * Check if a package is already installed and listed in package.json
 * This ensures the package won't be removed by subsequent npm install commands
 */
export declare function isPackageInstalled(packageName: string, uiBundleDir: string): boolean;
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