/**
 * GuardrailsService - Content safety, PII, and output validation
 */
import type { GuardrailInputOptions, GuardrailOutputOptions, GuardrailResult, GuardrailsModuleOptions, PIIEntityType } from './guardrails.types';
export declare class GuardrailsService {
    private static staticOptions;
    private options;
    constructor(options?: GuardrailsModuleOptions);
    static configure(options: GuardrailsModuleOptions): void;
    configure(options: GuardrailsModuleOptions): void;
    /**
     * Check input for guardrail violations
     */
    checkInput(input: string | object, options?: GuardrailInputOptions): GuardrailResult;
    /**
     * Check output for guardrail violations
     */
    checkOutput(output: string | object, options?: GuardrailOutputOptions): GuardrailResult;
    /**
     * Redact PII from text
     */
    redactPII(text: string, entities?: PIIEntityType[]): string;
    private mergeInputOptions;
    private extractText;
    private applyRedactionToObject;
    private validateSchema;
    private validateAgainstSchema;
}
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