import { ChildProcess } from "node:child_process";
/**
 * Tiered exit strategy for child processes:
 * 1. Send SIGTERM and wait for a grace period
 * 2. Send SIGKILL if still running after the grace period
 *
 * NOTE: This is forward-looking scaffolding for when the codebase
 * manages async child processes directly. Currently process lifecycle
 * is managed through pi-coding-agent internals.
 */
export declare function terminateWithGrace(child: ChildProcess, graceMs?: number): Promise<void>;