import type { ProviderRuntimeMetadata } from '../provider-runtime-metadata.js';
import type { ProviderFamilyProfile } from '../../../profile/profile-contracts.js';
export interface RequestHeaderBuildContext {
    baseHeaders: Record<string, string>;
    serviceHeaders: Record<string, string>;
    overrideHeaders: Record<string, string>;
    runtimeHeaders: Record<string, string>;
    authHeaders: Record<string, string>;
    normalizedClientHeaders?: Record<string, string>;
    inboundMetadata?: Record<string, unknown>;
    inboundUserAgent?: string;
    inboundOriginator?: string;
    runtimeMetadata?: ProviderRuntimeMetadata;
    familyProfile?: ProviderFamilyProfile;
    defaultUserAgent: string;
    isGeminiFamily: boolean;
    isAntigravity: boolean;
    codexUaMode: boolean;
}
export declare class RequestHeaderBuilder {
    private static pickRecordString;
    private static findHeaderFromSources;
    private static resolveOpenCodeZenProjectId;
    private static resolveOpenCodeZenSessionId;
    private static resolveOpenCodeZenRequestId;
    private static resolveOpenCodeZenClient;
    private static applyOpenCodeZenRoutingHeaders;
    private static isOpenCodeZenRuntime;
    static buildGeminiDefaultHeaders(baseHeaders: Record<string, string>, runtimeMetadata?: ProviderRuntimeMetadata): void;
    static buildHeaders(context: RequestHeaderBuildContext): Promise<Record<string, string>>;
}