import type { PromptRunnerHarnessName } from '../promptRunnerCliOptions';
/**
 * Checks that every given CLI coding harness is installed globally and, when enabled, up to date.
 * Offers to install missing harnesses and update outdated ones.
 *
 * Harness names which are `undefined`, for example when no `--harness` is selected in a dry run,
 * are ignored so that every call site can pass its raw selection.
 *
 * Note: `$` is used to indicate that this function is not a pure function - it may install npm packages
 *
 * @private internal utility of `promptbookCli`
 */
export declare function $ensureHarnessInstallations(harnessNames: ReadonlyArray<PromptRunnerHarnessName | undefined>, isHarnessUpdateCheckEnabled?: boolean): Promise<void>;