import type { MetadataField, MetadataStyle, MetadataStyleId } from './metadata-style.types.js';
/**
 * What actually distinguishes the three styles: how a list of fields becomes a
 * list of lines, and how a block written in this style is recognised.
 */
interface MetadataStyleDefinition {
    readonly id: MetadataStyleId;
    matches(blockLines: readonly string[]): boolean;
    formatLines(fields: readonly MetadataField[]): string[];
}
/**
 * Builds a {@link MetadataStyle} from the two operations that differ between
 * styles.
 *
 * `read` and `write` are shared and identical for all three: reading is
 * tolerant by construction (the block parser strips every marking) and writing
 * always re-emits the whole block, which is what guarantees a file never ends
 * up half in one style and half in another.
 */
export declare function defineMetadataStyle(definition: MetadataStyleDefinition): MetadataStyle;
export {};
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