import type { CollectionBeforeChangeHook } from 'payload';
/**
 * Maps document fields to SEO meta fields for auto-fill.
 * Defaults match the Payload website template (title → meta.title).
 */
export type AutoFillMapping = {
    /** Document field used to fill meta.description when empty. */
    description?: string;
    /** Document field used to fill meta.title when empty. Default: 'title'. */
    title?: string;
};
/**
 * Builds a beforeChange hook that fills empty SEO meta fields from document
 * content. Only fills when the meta field is blank — never overwrites what an
 * editor typed. This runs server-side on every create/update, so editors get
 * sensible meta without clicking "auto-generate".
 *
 * The plugin doesn't know the client's collection shape, so the field mapping
 * is configurable; defaults follow the website template.
 */
export declare function buildAutoFillMetaHook(mapping?: AutoFillMapping): CollectionBeforeChangeHook;