/**
 * Keep-alive settings sync — mirrors thread_registry keepAlive state into
 * settings.json for watcher backward compatibility.
 */
import type { Database } from "../data/memory/schema.js";
/**
 * Sync thread_registry keepAlive settings to settings.json for watcher backward compatibility.
 * The watcher's readKeeperSettingsFromFile() reads settings.json during startup before the MCP server is ready.
 */
export declare function syncKeepAliveToSettings(db: Database): void;
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