import { ProviderUsage } from '../base/ProviderUsage';
import type { UsagePayload } from '../base/types';
export declare class DummyProviderUsage extends ProviderUsage {
    readonly family = "dummy";
    readonly defaultContextLimit = 128000;
    extract(raw: unknown, _model?: string | null): UsagePayload | null;
    /** Synthesize a plausible usage snapshot for a dummy turn. */
    synthesize(promptChars: number): UsagePayload;
}