import { IDebugLogger } from '../utils/debuglogger';
import { SkillMetadata } from './types';
export declare function toOptionalString(value: unknown): string | undefined;
/**
 * Parses SKILL.md content and extracts frontmatter + markdown body.
 * If no valid frontmatter is present, frontmatter is empty and body is the full content.
 */
export declare function parseSkillMarkdown(content: string, logger: IDebugLogger): {
    frontmatter: Record<string, unknown>;
    body: string;
};
/**
 * Parses a SKILL.md file content to extract all metadata.
 */
export declare function parseSkillMetadataFromContent(content: string, skillPath: string, logger: IDebugLogger): SkillMetadata;
/**
 * Parses a SKILL.md file to extract metadata for the registry (legacy format)
 * @param {string} filePath - The absolute path to the SKILL.md file.
 * @returns {Object|null} - Returns { name, description, folderPath } or null if invalid.
 */
export default function parseSkillMetadata(filePath: string, logger: IDebugLogger): {
    name: string;
    description: string;
    folderPath: string;
} | null;