export interface ProviderRequestHeaderClientContext {
    name?: string;
    version?: string;
    versionHeaderFallback?: string;
    platform?: string;
    platformVersion?: string;
    isMultiRoot?: boolean;
}
export interface ProviderRequestHeaderLayers {
    stored?: Record<string, string>;
    config?: Record<string, string>;
    session?: Record<string, string>;
}
export interface OpenAICodexRequestHeaderContext {
    accountId?: string;
    accessToken?: string;
    userAgentVersion?: string;
}
export interface ResolveProviderRequestHeadersInput {
    providerId: string;
    sessionId: string;
    source?: string;
    defaultSource: string;
    client?: ProviderRequestHeaderClientContext;
    coreVersion: string;
    openAiCodex?: OpenAICodexRequestHeaderContext;
    headers?: ProviderRequestHeaderLayers;
}
export declare function resolveProviderRequestHeaders(input: ResolveProviderRequestHeadersInput): Record<string, string> | undefined;
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