/**
 * Slack's number_input docs say:
 *   "The minimum value, cannot be greater than max_value."
 *   "The maximum value, cannot be less than min_value."
 * JSON Schema can't compare two sibling string-encoded numbers natively, so
 * this helper walks the blocks array (bounded by MAX_WALK_DEPTH) and reports
 * any number_input where min_value > max_value.
 * @param blocks - array of Block Kit blocks or anything with a nested shape
 * @returns array of human-readable error messages (empty when valid)
 */
export declare function checkNumberInputBounds(blocks: readonly unknown[]): string[];
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