/**
 * Session Fanout — native spectral extension.
 *
 * Registers a single tool, `session_fanout`, that spawns multiple parallel
 * worker sessions in the current project — one real session per task, each
 * running the given prompt autonomously. Sessions appear immediately in the
 * Studio session list; each worker's final message is its report.
 *
 * Fire-and-forget by design: no progress API, no result collection. The
 * orchestrating agent only reports which sessions were created.
 *
 * Guardrails live in FanoutManager (src/server/fanout/fanout-manager.ts):
 * recursion block, 20-task hard cap, concurrency semaphore, one active run
 * per project, prompt dedupe/length limits.
 */
import type { ExtensionAPI } from "../../sdk/coding-agent/index.js";
export declare const SESSION_FANOUT_TOOL_NAME = "session_fanout";
export default function sessionFanoutExtension(ext: ExtensionAPI): Promise<void>;
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