/**
 * Centralized shutdown and signal handling for the CLI.
 * Ensures Ctrl+C always works and process exits cleanly.
 */
/**
 * Register a cleanup callback to run on shutdown
 */
export declare function onShutdown(callback: () => void | Promise<void>): () => void;
/**
 * Initiate authorized shutdown with cleanup
 */
export declare function authorizedShutdown(codeOrReason?: number | string): Promise<never>;
/**
 * Check if shutdown is in progress
 */
export declare function isShutdownInProgress(): boolean;
/**
 * Get the shutdown reason if shutting down
 */
export declare function getShutdownReason(): string | undefined;
/**
 * Install process-level signal handlers as fallback
 * This ensures Ctrl+C always works even if input handling fails
 */
export declare function installSignalHandlers(): void;
/**
 * Reset Ctrl+C counter (call when input is processed to prevent double-counting)
 */
export declare function resetCtrlCCounter(): void;
/**
 * Get current Ctrl+C count (for coordination with input handlers)
 */
export declare function getCtrlCCount(): number;
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