/**
 * @license
 * Copyright 2026 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { Frontmatter, Skill } from './skill.js';
/**
 * Formats available skills into a standard XML string.
 *
 * @param skills A list of skill frontmatter or full skill objects.
 * @returns XML string with <available_skills> block.
 */
export declare function formatSkillsAsXml(skills: Array<Skill | Frontmatter>): string;