/**
 * postgres-mcp - FTS Configuration Validation
 *
 * Validates PostgreSQL full-text search configuration names
 * to prevent SQL injection via config parameter.
 */
/**
 * Error thrown when an invalid FTS configuration is provided
 */
export declare class InvalidFtsConfigError extends Error {
    constructor(config: string);
}
/**
 * Validates a PostgreSQL full-text search configuration name.
 *
 * FTS configs must follow PostgreSQL identifier naming rules:
 * - Start with a letter or underscore
 * - Contain only letters, digits, underscores, or dollar signs
 * - Be at most 63 characters long
 *
 * @param config - The configuration name to validate
 * @throws InvalidFtsConfigError if the config name is invalid
 *
 * @example
 * validateFtsConfig("english");          // OK
 * validateFtsConfig("my_custom_config"); // OK
 * validateFtsConfig("english'; DROP");   // Throws InvalidFtsConfigError
 */
export declare function validateFtsConfig(config: string): void;
/**
 * Validates and returns a safe FTS configuration name.
 *
 * @param config - The configuration name to sanitize
 * @returns The validated config name (unchanged if valid)
 * @throws InvalidFtsConfigError if the config name is invalid
 */
export declare function sanitizeFtsConfig(config: string): string;
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