import * as os from "node:os";
import { type ResourceHostSample, type ResourceSampleResult, type ResourceSamplerState } from "./contract.js";
export type NativeResourceCommand = (file: string, args: readonly string[]) => string | null;
export interface NativeResourceSamplerOptions {
    nowMs?: number;
    platform?: "darwin" | "win32";
    os?: Partial<Pick<typeof os, "cpus" | "totalmem" | "freemem" | "availableParallelism" | "loadavg">>;
    command?: NativeResourceCommand;
    backgroundHost?: boolean;
    /** Supervisors use the background collector to keep native CPU sampling on cadence. */
    hostCollector?: () => ResourceHostSample;
}
export declare function sampleNativeResources(_coordRoot: string, previous?: ResourceSamplerState, options?: NativeResourceSamplerOptions): ResourceSampleResult;
export declare function parseMacVmStat(output: string): {
    available_bytes: number;
} | null;
export declare function parseMacSwapUsage(output: string): {
    total: number;
    used: number;
} | null;
export interface WindowsHostOptions {
    nowMs?: number;
    command?: NativeResourceCommand;
}
export declare function createWindowsHostCollector(): (options?: WindowsHostOptions) => ResourceHostSample;
export declare const collectWindowsHost: (options?: WindowsHostOptions) => ResourceHostSample;
export type NativeResourceAsyncCommand = (file: string, args: readonly string[]) => Promise<string | null>;
export interface WindowsHostBackgroundOptions {
    nowMs?: number;
    command?: NativeResourceAsyncCommand;
}
/** Return immediately; one process-wide probe refreshes all callers' cached host reading. */
export declare function createWindowsHostBackgroundCollector(): (options?: WindowsHostBackgroundOptions) => ResourceHostSample;
export declare const collectWindowsHostInBackground: (options?: WindowsHostBackgroundOptions) => ResourceHostSample;
export declare function parseWindowsResourceOutput(output: string, nowMs?: number): ResourceHostSample;
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