/**
 * Process Layer Utilities
 *
 * Helper functions for the Process Layer including ID generation,
 * formatting, and validation utilities.
 *
 * @module execution/process/utils
 */
/**
 * Generate a unique process ID with a prefix
 *
 * Creates URL-safe, unique identifiers for processes. Uses nanoid for
 * cryptographically strong random IDs.
 *
 * @param prefix - Prefix for the ID (e.g., 'process', 'task')
 * @returns Unique ID string in format: `{prefix}-{randomId}`
 *
 * @example
 * ```typescript
 * const id = generateId('process');
 * // Returns: 'process-a1b2c3d4'
 * ```
 */
export declare function generateId(prefix: string): string;
/**
 * Format duration in milliseconds to human-readable string
 *
 * @param ms - Duration in milliseconds
 * @returns Formatted duration string
 *
 * @example
 * ```typescript
 * formatDuration(1500); // "1.5s"
 * formatDuration(65000); // "1m 5s"
 * ```
 */
export declare function formatDuration(ms: number): string;
/**
 * Validate that a signal name is valid for Node.js
 *
 * @param signal - Signal name to validate
 * @returns True if signal is valid
 */
export declare function isValidSignal(signal: string): boolean;
/**
 * Format error message from process exit
 *
 * @param exitCode - Process exit code
 * @param signal - Signal that terminated the process
 * @returns Formatted error message
 */
export declare function formatProcessError(exitCode: number | null, signal: string | null): string;
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