import type { AbortSignal } from 'bare-abort-controller';
import type { FitProbeRequest } from './engine-fit.js';
import type { FitRunResult, FitRunUnknownReason } from './fit-outcome.js';
export type IsolatedFitUnknownReason = FitRunUnknownReason;
export type IsolatedFitResult = FitRunResult;
export interface SpawnContext {
    command: string;
    options: {
        args: string[];
        platform: string;
        arch: string;
        stdio: string[];
        env: Record<string, string>;
    };
}
export interface RuntimeContext {
    platform: string;
    arch: string;
    isAndroid: boolean;
    isBrowser: boolean;
    isIOS: boolean;
}
export interface RunIsolatedFitOptions {
    timeoutMs?: number;
    signal?: AbortSignal;
    spawnProcess?: (context: SpawnContext) => ChildProcess;
    runtime?: RuntimeContext;
    environment?: Record<string, string | undefined>;
    runnerPath?: string;
    runnerArgs?: string[];
    terminationGraceMs?: number;
    finalKillGraceMs?: number;
    drainGraceMs?: number;
}
export interface ErrorEmitter {
    on(event: 'error', listener: (error: Error) => void): unknown;
    off(event: 'error', listener: (error: Error) => void): unknown;
}
export interface ReadableChildStream {
    setEncoding(encoding: 'utf8'): void;
    destroy(): void;
    on(event: 'error', listener: (error: Error) => void): unknown;
    on(event: 'data', listener: (chunk: string) => void): unknown;
    off(event: 'error', listener: (error: Error) => void): unknown;
    off(event: 'data', listener: (chunk: string) => void): unknown;
}
export interface WritableChildStream {
    end(data?: string): void;
    destroy(): void;
    on(event: 'error', listener: (error: Error) => void): unknown;
    off(event: 'error', listener: (error: Error) => void): unknown;
}
export interface ChildProcess {
    stdin: WritableChildStream | null;
    stdout: ReadableChildStream | null;
    stderr: ReadableChildStream | null;
    kill(signal?: string): boolean;
    on(event: 'error', listener: (error: Error) => void): unknown;
    on(event: 'exit' | 'close', listener: (code: number | null, signal: string | number | null) => void): unknown;
    off(event: 'error', listener: (error: Error) => void): unknown;
    off(event: 'exit' | 'close', listener: (code: number | null, signal: string | number | null) => void): unknown;
}
export declare function runIsolatedFit(probe: FitProbeRequest, options?: RunIsolatedFitOptions): Promise<IsolatedFitResult>;