export interface MarkdownDocument<T extends Record<string, unknown> = Record<string, unknown>> {
    frontmatter: T;
    body: string;
}
export declare function parseMarkdownDocument<T extends Record<string, unknown> = Record<string, unknown>>(text: string, path: string): MarkdownDocument<T>;
export declare function readMarkdownDocument<T extends Record<string, unknown> = Record<string, unknown>>(path: string): Promise<MarkdownDocument<T>>;
export declare function renderMarkdownDocument(frontmatter: Record<string, unknown>, body: string): string;
export declare function sha256(content: string): string;
export declare function requireString(value: unknown, field: string, path: string): string;
export declare function optionalStringArray(value: unknown, field: string, path: string): string[];