export declare const RESPONSES_VOLATILE_STUB = "responses-volatile";
export interface StoredResponse {
    id: string;
    createdAtSec: number;
    expiresAtSec: number;
    responseObject: Record<string, unknown>;
    inputItems: unknown[];
    modelAlias: string;
}
export interface ResponsesStoreOptions {
    maxEntries?: number;
    ttlMs?: number;
    now?: () => number;
}
export interface ListInputItemsOptions {
    limit?: number;
    after?: string | undefined;
}
export interface ResponsesStore {
    put: (record: StoredResponse) => void;
    get: (id: string) => StoredResponse | undefined;
    delete: (id: string) => boolean;
    listInputItems: (id: string, opts?: ListInputItemsOptions) => {
        object: string;
        data: unknown[];
        first_id: string | null;
        last_id: string | null;
        has_more: boolean;
    } | null;
    size: () => number;
    bannerLine: () => string;
}
export declare const RESPONSES_DEFAULT_TTL_SEC: number;
export declare function createResponsesStore(options?: ResponsesStoreOptions): ResponsesStore;
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