import { ParseResult } from './types';
export type Severity = 'error' | 'warning';
export interface LintIssue {
    line: number;
    severity: Severity;
    code: string;
    message: string;
    rule: string;
}
/**
 * Static analysis over a parsed filter list.
 *
 * The goal is the kind of feedback a list maintainer actually wants before they
 * publish: duplicates that bloat the list, rules that can never match, and
 * patterns that are almost certainly typos. We err toward `warning` over
 * `error` so the linter is usable in CI without being a nuisance — only
 * genuinely broken rules are errors.
 */
export declare function lint(result: ParseResult): LintIssue[];