import type { Readable, Writable } from "node:stream";
export interface SpawnInput {
    command: string;
    args: string[];
    cwd?: string;
    env?: NodeJS.ProcessEnv;
}
/** Minimal child-process surface the lane pool depends on. */
export interface ChildLike {
    readonly stdout: Readable;
    readonly stderr: Readable;
    readonly stdin: Writable;
    kill(signal?: NodeJS.Signals): boolean;
    readonly killed: boolean;
    on(event: "error", listener: (error: Error) => void): this;
    on(event: "close", listener: (code: number | null) => void): this;
}
/** Injectable spawner (I11). */
export type SpawnFn = (input: SpawnInput) => ChildLike;
/**
 * Default spawner backed by node:child_process. Stdio is fully piped so the
 * pool can inject the task on stdin (one-shot) and stream stdout/stderr.
 */
export declare const defaultSpawn: SpawnFn;