import type { SyncSkillsFileEntry } from './sync-skills.types.js';
/** @purpose Formatting options for the sync-skills formatter. */
export type SyncSkillsFormatOptions = {
    /** @purpose Preview mode — shows would-be actions without writing. */
    dryRun?: boolean;
};
/**
 * @purpose Format sync-skills entries into stdout lines grouped by skill with markers.
 * @param entries List of sync-skills file entries.
 * @param [opts] Formatting options — dryRun enables preview labels.
 * @returns Array of formatted lines; the last line is the summary.
 */
export declare function format(entries: SyncSkillsFileEntry[], opts?: SyncSkillsFormatOptions): string[];