import { ProjectPluginStructure } from '@teleporthq/teleport-types';
/** One rule of `next.config.js`'s `headers()`. */
export interface NextHeaderRule {
    source: string;
    headers: Array<{
        key: string;
        value: string;
    }>;
}
/**
 * Serves `rules` through `next.config.js` — the one place that reaches both a
 * TeleportHQ deploy and a self-hosted export (the platform rewrites
 * `vercel.json`'s headers away). Creates the config when the project has
 * none, and leaves every other key of an existing one as it was. A `headers()`
 * the generator did not write is someone else's decision and is left alone.
 */
export declare const addNextConfigHeaderRules: (structure: ProjectPluginStructure, rules: NextHeaderRule[]) => void;
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