import type { CompletionRequest } from '../types/messages.js';
import type { SecurityConfig, SecurityResult } from '../types/security.js';
/** Checks requests for secrets, dangerous URLs, and other unsafe input. */
export declare class InputGuard {
    /** Checks a request, blocking, flagging, or redacting as configured. */
    protect(request: CompletionRequest, config?: SecurityConfig): SecurityResult<CompletionRequest>;
    private inspectAndMaybeMask;
    private extractText;
}