import type { Configuration } from '../configuration';
import type { LoadSnapshot } from './load_signal';
import { SnapshotStore } from './load_signal';
import type { SystemInfo } from './system_status';
export interface CpuSnapshot extends LoadSnapshot {
    usedRatio: number;
    ticks?: {
        idle: number;
        total: number;
    };
}
export interface CpuLoadSignalOptions {
    overloadedRatio?: number;
    snapshotHistoryMillis?: number;
    config: Configuration;
}
/**
 * Tracks CPU usage via `SYSTEM_INFO` events and reports overload when
 * the platform or local OS metrics indicate the CPU is overloaded.
 */
// @ts-ignore optional peer dependency or compatibility with es2022
export declare function createCpuLoadSignal(options: CpuLoadSignalOptions): Omit<import("./load_signal").LoadSignal, "getSample"> & {
    store: SnapshotStore<CpuSnapshot>;
    handle: (payload: SystemInfo) => void;
    getSample(sampleDurationMillis?: number): CpuSnapshot[];
};
/** @internal Return type for backward compat in Snapshotter facade */
export type CpuLoadSignal = ReturnType<typeof createCpuLoadSignal>;