export interface FrontmatterResult<T = Record<string, unknown>> {
    data: T;
    content: string;
    isEmpty: boolean;
    excerpt?: string;
}
/**
 * Parse frontmatter from markdown content
 */
export declare function parseFrontmatter<T = Record<string, unknown>>(content: string): FrontmatterResult<T>;
/**
 * Check if content has frontmatter
 */
export declare function hasFrontmatter(content: string): boolean;
/**
 * Extract frontmatter string from content
 */
export declare function extractFrontmatterString(content: string): string | null;
/**
 * Stringify frontmatter data to YAML
 */
export declare function stringifyFrontmatter(data: Record<string, unknown>): string;
/**
 * Add or update frontmatter in content
 */
export declare function setFrontmatter(content: string, data: Record<string, unknown>): string;
/**
 * Merge frontmatter data with existing
 */
export declare function mergeFrontmatter(content: string, newData: Record<string, unknown>): string;
/**
 * Remove frontmatter from content
 */
export declare function removeFrontmatter(content: string): string;
/**
 * Get specific frontmatter field
 */
export declare function getFrontmatterField<T>(content: string, field: string): T | undefined;
/**
 * Set specific frontmatter field
 */
export declare function setFrontmatterField(content: string, field: string, value: unknown): string;
/**
 * Validate frontmatter structure
 */
export declare function validateFrontmatter(content: string, requiredFields: string[]): {
    valid: boolean;
    missingFields: string[];
};
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