/**
 * Project Path and Directory Management
 * Constants and helpers for managing the local server and project filesystem structure.
 *
 * Provides:
 * - PROJECT_ROOT: Resolution for the server install directory.
 * - LOCKS_DIR: Location for physical UART semaphore files.
 * - LOGS_DIR: Location for build and serial monitor trace files.
 * - ensureDir: Generic directory creation helper.
 * - ensureLocksDir: Specific helper for internal locks.
 * - sanitizePortName: Filename-safe transformation for serial paths.
 */
export declare const PROJECT_ROOT: string;
export declare const SERVER_DATA_DIR: string;
export declare const GLOBAL_LOCKS_DIR: string;
/**
 * Ensures a directory exists.
 */
export declare function ensureDir(dir: string): void;
/**
 * Ensures the global directories exist.
 */
export declare function ensureGlobalDirs(): void;
/**
 * Sanitizes a serial port path into a safe filename component.
 * e.g. /dev/cu.usbserial-110 -> dev_cu_usbserial-110
 *
 * @param port - The serial port path
 * @returns A safe string for use in filenames
 */
export declare function sanitizePortName(port: string): string;
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