/**
 * Shell safety utilities — input validation for values passed to CLI subprocesses.
 *
 * Prevents command injection by rejecting values that contain shell
 * metacharacters.  Only alphanumeric characters, hyphens, underscores,
 * and dots are allowed.
 * @module
 */
/**
 * Validate that a string is safe to pass as a CLI argument.
 *
 * @throws {Error} When the value contains characters outside the safe set.
 */
export declare function assertSafeShellArg(value: string, label: string): void;
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