/**
 * Response Validator for NotebookLM MCP Server
 *
 * Validates and sanitizes responses from NotebookLM:
 * - Prompt injection detection
 * - Malicious URL detection
 * - Encoded payload detection
 * - Response sanitization
 *
 * Uses patterns derived from MEDUSA AI Security Scanner.
 * Added by Pantheon Security for hardened fork.
 */
/**
 * Response validation result
 */
export interface ValidationResult {
    safe: boolean;
    warnings: string[];
    blocked: string[];
    sanitized: string;
    originalLength: number;
    sanitizedLength: number;
}
/**
 * Response validator configuration
 */
export interface ResponseValidatorConfig {
    /** Enable response validation (default: true) */
    enabled: boolean;
    /** Block responses containing prompt injection (default: true) */
    blockPromptInjection: boolean;
    /** Block responses containing suspicious URLs (default: true) */
    blockSuspiciousUrls: boolean;
    /** Block responses containing encoded payloads (default: false - just warn) */
    blockEncodedPayloads: boolean;
    /** Warn on suspicious content without blocking (default: true) */
    warnOnSuspicious: boolean;
    /** Allowed domains for URLs in responses */
    allowedDomains: string[];
}
/**
 * Response Validator Class
 */
export declare class ResponseValidator {
    private config;
    private stats;
    constructor(config?: Partial<ResponseValidatorConfig>);
    /**
     * Validate a response from NotebookLM
     */
    validate(response: string): Promise<ValidationResult>;
    /**
     * Detect prompt injection attempts in text
     */
    detectPromptInjection(text: string): Array<{
        pattern: RegExp;
        description: string;
        severity: string;
        match: string;
    }>;
    /**
     * Detect suspicious URLs in text
     */
    detectSuspiciousUrls(text: string): Array<{
        pattern: RegExp;
        description: string;
        url: string;
    }>;
    /**
     * Detect encoded payloads in text
     */
    detectEncodedPayloads(text: string): Array<{
        pattern: RegExp;
        description: string;
        match: string;
    }>;
    /**
     * Get validation statistics
     */
    getStats(): typeof this.stats;
    /**
     * Reset statistics
     */
    resetStats(): void;
    /**
     * Update configuration
     */
    updateConfig(config: Partial<ResponseValidatorConfig>): void;
}
/**
 * Get or create the global response validator
 */
export declare function getResponseValidator(): ResponseValidator;
/**
 * Convenience function to validate a response
 */
export declare function validateResponse(response: string): Promise<ValidationResult>;