import type { AnchorStore } from '../compress/anchor.js';
import type { Finding } from '../compress/knowledge.js';
import type { Tuning } from '../compress/options.js';
import type { CompressionFacts } from './accounting.js';
/** Reuse bounded tool-output compression; never send Responses fields to Chat.
 * Only string tool results are eligible. All other message and provider fields
 * remain exact, including reasoning, multimodal parts, tools and call metadata.
 */
export declare function compressChatCompletions(body: Buffer, request: Record<string, unknown>, spill: (content: string, hint: string) => string, anchors?: AnchorStore, findings?: readonly Finding[], tuning?: Tuning, sharedGraph?: boolean): {
    body: Buffer;
    summary: CompressionFacts;
};
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