/**
 * SQL Linter (v2.17)
 *
 * Pure-rule lint engine: 10 regex-based rules. No IO, sync.
 * Output is advisory — caller decides whether to block (we don't).
 */
export type LintSeverity = 'error' | 'warning' | 'info';
export interface LintIssue {
    rule: string;
    severity: LintSeverity;
    message: string;
    suggestion?: string;
}
export interface LintResult {
    sql: string;
    issues: LintIssue[];
    hasErrors: boolean;
    hasWarnings: boolean;
}
export declare function lintSql(sql: string): LintResult;
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