/**
 * NegotiationSummarizer — pure LLM pass that compresses one DiscoveryNegotiation
 * (potentially several KB of turn reasoning + outcome reasoning) into a
 * DiscoveryNegotiationDigest (≤256 bytes structured). The digest is what the decision-
 * question generator consumes, replacing the raw negotiation blob.
 *
 * Why: a 10-candidate discovery turn used to produce a 60+ KB prompt for the
 * question generator, which stalled upstream Gemini/OpenRouter routes and
 * dropped the connection at ~3 minutes. Per-negotiation summarization caps
 * the question-generator input at a fixed, predictable size.
 */
import { type DiscoveryNegotiationDigest } from "../../shared/schemas/negotiation-digest.schema.js";
import type { DiscoveryNegotiation } from "../../shared/schemas/discovery-question.schema.js";
export declare class NegotiationSummarizer {
    private model;
    constructor();
    summarize(negotiation: DiscoveryNegotiation, options?: {
        signal?: AbortSignal;
    }): Promise<DiscoveryNegotiationDigest | null>;
}
/**
 * Deterministic fallback when the LLM summarizer fails or isn't wired. Produces
 * a minimal but valid digest so the question generator still has *some* signal.
 */
export declare function buildFallbackDigest(n: DiscoveryNegotiation): DiscoveryNegotiationDigest;