import type { DefinitionFieldIssueChecker } from './definition-issue-registry.js';
/**
 * Creates an issue checker that ensures a specific value for a given field
 * appears at most once in an array of objects.
 *
 * Used with `.apply(withIssueChecker(checkUniqueFieldValue(...)))` on array schemas.
 *
 * @param field - The field name to check
 * @param value - The specific value that should appear at most once
 * @param options.label - Human-readable label for the item type (e.g. "backend app")
 * @param options.severity - Severity level for duplicate issues (default: 'error')
 */
export declare function checkUniqueFieldValue<K extends string>(field: K, value: unknown, options?: {
    label?: string;
    severity?: 'error' | 'warning';
}): DefinitionFieldIssueChecker<Record<K, unknown>[]>;
/**
 * Creates an issue checker that detects duplicate values for a given field
 * in an array of objects.
 *
 * Used with `.apply(withIssueChecker(checkUniqueField(...)))` on array schemas.
 *
 * @param field - The field name to check for uniqueness
 * @param options.label - Human-readable label for the field (e.g. "name", "port")
 * @param options.severity - Severity level for duplicate issues (default: 'error')
 */
export declare function checkUniqueField<K extends string>(field: K, options?: {
    label?: string;
    severity?: 'error' | 'warning';
}): DefinitionFieldIssueChecker<Record<K, unknown>[]>;
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