import type { SessionRegistrySession, TerminalSessionSignal } from "./registry-types.ts";
/** How long a detached child may take to exit after SIGTERM before it is SIGKILLed. */
export declare const DEFAULT_DETACHED_EXIT_GRACE_MS = 1000;
export declare function getRuntimePlatform(): string;
export declare function defaultKillProcess(target: number, signal: TerminalSessionSignal): void;
/**
 * SIGTERM every tracked detached child, then — after a bounded grace — SIGKILL
 * the ones still alive. Without the escalation a child that ignores SIGTERM is
 * abandoned the moment the registry forgets its session.
 */
export declare function cleanupDetachedChildren(session: SessionRegistrySession, platform: string, killProcess: (target: number, signal: TerminalSessionSignal) => void, exitGraceMs?: number): Promise<void>;
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