import { z } from 'zod';
export declare const AgentUsage: z.ZodObject<{
    totalTokens: z.ZodOptional<z.ZodNumber>;
    updatedAt: z.ZodOptional<z.ZodString>;
}, z.core.$strip>;
export type AgentUsage = z.infer<typeof AgentUsage>;
export declare class AgentUsageStore {
    private readonly file;
    constructor(agentId: string);
    read(): Promise<AgentUsage>;
    update(op: (current: AgentUsage) => AgentUsage | Promise<AgentUsage>): Promise<AgentUsage>;
}
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