import type { ProjectKnowledge, Spec, GeneratedDocument } from '../../../types/index.js';
/**
 * Generate a self-contained HTML executive summary document.
 * Output is placed at planu/executive-summary.html (portal hub location).
 * Returns a GeneratedDocument with type 'executive-summary'.
 *
 * @param knowledge - Project knowledge data.
 * @param specs - All project specs.
 * @param _language - Language hint (reserved for future i18n).
 * @param availablePages - Portal pages that exist on disk (for navbar display).
 */
export declare function generateExecutiveSummary(knowledge: ProjectKnowledge, specs: Spec[], _language: string, availablePages?: string[]): GeneratedDocument;
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