/**
 * Provider-agnostic summarizer implementing the framework's `SummarizerLike`
 * interface via a Vercel AI SDK `LanguageModel`.
 *
 * Distinct from the classic `Summarizer` (`src/ai/summarizer.ts`), which
 * uses a structural `ChatCompletionsClient` that only fits OpenAI-shaped
 * SDKs. `AISDKSummarizer` swaps providers with a one-import change:
 *
 *   import { AISDKSummarizer } from '@emerleite/wa-agent/ai-sdk';
 *   import { anthropic } from '@ai-sdk/anthropic';
 *
 *   new Agent({
 *     summarizer: new AISDKSummarizer({
 *       model: anthropic('claude-haiku-4-5'),
 *       maxOutputTokens: 256,
 *     }),
 *   });
 *
 * Any AI SDK `LanguageModel` works — swap `anthropic(...)` for `openai(...)`,
 * `google(...)`, `groq(...)`, `mistral(...)`, `cerebras(...)`, `deepseek(...)`,
 * or `@ai-sdk/openai-compatible` (LiteLLM proxy / Ollama / LM Studio) and
 * nothing else in your app changes.
 */
import { type LanguageModel } from 'ai';
import type { SummarizerLike } from '../types.js';
export interface AISDKSummarizerOptions {
    /** AI SDK `LanguageModel` (from `@ai-sdk/openai`, `/anthropic`, `/google`, etc.). */
    model: LanguageModel;
    /**
     * System prompt. Default: a concise instruction to summarize into ≤4
     * short bullets in the input's language. Override for domain-specific tone.
     */
    systemPrompt?: string;
    /** `maxOutputTokens` forwarded to `generateText`. Default 400. */
    maxOutputTokens?: number;
    /** `temperature` forwarded to `generateText`. Default 0.3 (low-variance summaries). */
    temperature?: number;
}
export declare class AISDKSummarizer implements SummarizerLike {
    private readonly model;
    private readonly systemPrompt;
    private readonly maxOutputTokens;
    private readonly temperature;
    constructor(opts: AISDKSummarizerOptions);
    summarize(text: string): Promise<string | null>;
}
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