import { z } from 'zod';
export declare const TokenUsagePeriodEnum: z.ZodEnum<{
    today: "today";
    current_session: "current_session";
    last_hour: "last_hour";
    all_time: "all_time";
}>;
export declare const TokenUsageGroupByEnum: z.ZodEnum<{
    session: "session";
    tool: "tool";
}>;
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