/**
 * Validation utilities for common operations
 */
/**
 * Validate and resolve working directory
 * @param {string|null|undefined} workingDirectory
 * @returns {string}
 */
export function validateWorkingDirectory(workingDirectory: string | null | undefined): string;
/**
 * Validate task ID format - more lenient for backward compatibility
 */
export function validateTaskId(taskId: any): void;
/**
 * Validate message input
 */
export function validateMessage(message: any): void;
/**
 * Validate prompt input (deprecated, use validateMessage)
 */
export function validatePrompt(prompt: any): void;
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