/**
 * GuardrailViolationError - Thrown when guardrail check fails
 */
export declare class GuardrailViolationError extends Error {
    readonly violations?: string[] | undefined;
    readonly blockedReason?: string | undefined;
    constructor(message: string, violations?: string[] | undefined, blockedReason?: string | undefined);
    toJSON(): {
        message: string;
        violations?: string[];
        blockedReason?: string;
    };
}
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