import type { Application, ApplicationLogger, HttpAdapterShutdownRegistration } from '@fluojs/runtime';
/** Signals accepted by the Node host shutdown registration. */
export type NodeShutdownSignal = 'SIGINT' | 'SIGTERM';
/**
 * Returns the default POSIX shutdown signals used by Node-hosted runtime helpers.
 *
 * @returns The ordered list of signals that trigger graceful shutdown registration.
 */
export declare function defaultNodeShutdownSignals(): readonly NodeShutdownSignal[];
/**
 * Creates shutdown registration logic for Node-hosted adapters.
 *
 * The returned registration preserves graceful shutdown semantics while leaving
 * final process termination ownership to the surrounding host/runtime.
 *
 * @param signals Signals to register, or `false` to disable signal handling.
 * @returns Registration callback supplied to `FluoFactory.create(..., { shutdownRegistration })`.
 */
export declare function createNodeShutdownSignalRegistration(signals?: false | readonly NodeShutdownSignal[]): HttpAdapterShutdownRegistration;
/**
 * Registers process signal handlers that attempt graceful shutdown.
 *
 * When the shutdown timeout elapses, the helper records failure via logging and
 * `process.exitCode` but does not terminate the host process directly.
 *
 * @param app Application instance to close when a signal arrives.
 * @param logger Logger used for shutdown diagnostics.
 * @param signals Signals to bind, or `false` to skip registration.
 * @param forceExitTimeoutMs Timeout window used to mark shutdown as failed.
 * @returns Unregister callback that removes the installed signal handlers.
 */
export declare function registerShutdownSignals(app: Application, logger: ApplicationLogger, signals: false | readonly NodeShutdownSignal[], forceExitTimeoutMs?: number): () => void;
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