export interface SqlGuardResult {
    ok: boolean;
    /** Present when ok=false — a short, agent-readable reason. */
    error?: string;
}
/**
 * Reject anything but a single read statement. Multi-statement detection is
 * intentionally simple: split on `;` outside of single/double-quoted strings
 * and require at most one non-empty statement.
 */
export declare function validateReadOnlySql(raw: string): SqlGuardResult;
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