import type { Child } from "./localServe.js";
/** How `agency local serve` starts a model process: the options every
 *  process gets, and the two ways its output can go. */
/** Where a model process's output goes: to this terminal, or to a pipe
 *  the caller reads. */
export type ChildOutput = "inherit" | "pipe";
/** The options every model process is started with. A piped process is
 *  told not to buffer, because Python writes in blocks when its output is
 *  not a terminal, and its lines would arrive late. */
export declare function spawnOptions(output: ChildOutput): {
    stdio: ["pipe", ChildOutput, ChildOutput];
    env: Record<string, string | undefined>;
};
export declare function realSpawn(python: string, args: string[]): Child;
/** Starts a model process whose output goes to `log`, a line at a time.
 *  The pipes are always read, whatever `log` does with the lines: a
 *  process whose pipe fills up stops. */
export declare function pipedSpawn(log: (line: string) => void): (python: string, args: string[]) => Child;