import type { CompletionRequest } from '../types/messages.js';
import type { DensificationConfig } from '../types/optimizer.js';
/** Rewrites prompts to use fewer tokens without changing what they say. */
export declare class PromptDensifier {
    /** Densifies every text message in a request. */
    densifyRequest(request: CompletionRequest, config?: DensificationConfig): {
        request: CompletionRequest;
        techniques: string[];
    };
    /**
     * Densifies one text, leaving fenced code untouched unless configured otherwise, and records the
     * techniques applied.
     */
    densifyText(text: string, techniques: string[], applied: Set<string>, config: DensificationConfig): string;
    private splitCodeBlocks;
}