import type { ModelInfo, ModelRef, RegistryLike, TokenUsage, VoiceResult } from "./types.js";
import { type QualityMetrics, type StructuredSynthesis } from "./synthesis/quality.js";
export interface SynthesisArgs {
    conductor: ModelRef;
    prompt: string;
    optimizedPrompt?: string;
    voices: VoiceResult[];
    totalVoices: number;
    registry: ModelInfo[];
    modelRegistry?: RegistryLike;
    signal: AbortSignal;
    fetchImpl?: typeof fetch;
    callModel?: (args: {
        model: ModelRef;
        prompt: string;
        systemPrompt: string;
        signal: AbortSignal;
        onDelta?: (text: string) => void;
        structuredOutput?: boolean;
    }) => Promise<{
        output: string;
        usage?: TokenUsage;
        costUsd: number | null;
    }>;
    onDelta?: (text: string) => void;
}
export interface SynthesisResult {
    synthesis: string;
    usage?: TokenUsage;
    costUsd: number | null;
    structured?: StructuredSynthesis;
    qualityMetrics?: QualityMetrics;
    rawOutput?: string;
}
export declare function synthesize(args: SynthesisArgs): Promise<SynthesisResult>;
export declare function buildSynthesisPrompt(args: {
    prompt: string;
    optimizedPrompt?: string;
    voices: VoiceResult[];
    totalVoices: number;
    registry?: ModelInfo[];
    conductor?: ModelRef;
}): string;