import type { HarnessDefinition } from './HarnessDefinition';
/**
 * Reads the version of the globally installed harness command.
 *
 * Note: `$` is used to indicate that this function is not a pure function - it runs the harness command
 *
 * @returns The installed version or `null` when the harness command is not available globally
 * @private internal utility of `promptbookCli`
 */
export declare function $resolveInstalledHarnessVersion(definition: HarnessDefinition): Promise<string | null>;