import { WebError } from '@deepseek-ai/dsh-web';
/** Safe request-option leaves; never includes auth, URL path/query or opaque provider state. */
export interface SearchBackend {
    readonly provider: 'deepseek-official';
    readonly origin: string;
    readonly model: string;
    readonly customEndpoint: boolean;
}
/** Bounded metadata included in the same query's successful or failed fallback notice. */
export declare function describeSearchBackend(backend: SearchBackend): string;
/** Known sanitized failure, distinct from arbitrary native provider exception messages. */
export declare class DescribedSearchFallbackError extends WebError {
    readonly backend: SearchBackend | undefined;
    constructor(backend: SearchBackend | undefined, code?: WebError['code']);
}
//# sourceMappingURL=search-backend.d.ts.map