import type { SizesFixture } from './types.js';
export { DDLT_SIZE_CAPTURE_VERSION } from './captureContract.js';
export interface FixtureFreshnessOptions {
    fixtureId: string;
    mmdSource: string;
    requireMetadata?: boolean;
}
export declare function hashDdltFixtureSource(source: string): string;
export declare function assertSizesFixtureFresh(fixture: SizesFixture, options: FixtureFreshnessOptions): void;