/**
 * Resolve an npm package by name (and optional version pin) inside the given
 * project's `node_modules`. Walks up parent directories so a server launched
 * from a subfolder still finds the project root install.
 */
export interface ResolvedPackage {
    name: string;
    version: string;
    pkgDir: string;
    pkgJsonPath: string;
}
/**
 * Walk up from `startDir` looking for a `node_modules/<name>` directory.
 * Returns the matching package directory or null.
 */
export declare function findInstalledPackage(name: string, startDir: string): string | null;
export declare function resolvePackage(name: string, version: string | undefined, projectDir: string): ResolvedPackage;