import { type SpawnRelayTarget, type SpawnSessionEvent } from './spawn-session.js';
/**
 * Bridges the shared spawn event bus (`onSessionEvent`) to a new sibling
 * spawn: when a source spawn that declared a `relayTarget` completes (or
 * fails, if opted in), builds and launches the target spawn with the
 * source's result folded into its goal. Only forward-relay to a not-yet-
 * started target is supported — injecting into an already-running sibling
 * is out of scope (phase-spawns have no resume primitive).
 *
 * Idempotent per process, mirroring chat-auto-resume.ts's registration guard.
 */
export declare function registerSpawnRelay(cwd: string): () => void;
/**
 * Folds the source spawn's result into the target's goal string (rendered
 * under `## Goal` by renderPacketAsPrompt). Mirrors chat-auto-resume.ts's
 * composeWakeMessage, adapted to prepend the target's own goal rather than
 * stand alone, and to frame the relayed content as sibling input rather than
 * the target's own prior output.
 */
export declare function composeRelayGoal(event: SpawnSessionEvent, target: SpawnRelayTarget): string;