/**
 * The OrcaRouter summarizer: this package's own model calls, routed through the provider seam.
 *
 * WHY THIS ADAPTER EXISTS AT ALL. `createSummarizerFromEnv()` picks the highest-fidelity summarizer
 * whose credentials are present, and the two it shipped with speak Anthropic and Google dialects on
 * those vendors' hosts. A user who holds an OrcaRouter key has no way to make the optimizer's own
 * model calls go through the gateway they already pay for, even though OrcaRouter is
 * OpenAI-compatible and the request is a plain chat completion.
 *
 * IT TAKES A CREDENTIAL, NOT A KEY. Construction goes through `sendProviderRequest`, which resolves
 * the key from the shared credential seam, so this adapter is identical whether the user pasted a key
 * or authorized in a browser. It never reads `ORCAROUTER_API_KEY` itself and never sees a raw secret
 * in its own signature.
 *
 * THE MODEL IS NOT GUESSED. A caller supplies one from the catalog; when it does not, the model comes
 * from `TOKEN_OPTIMIZER_ORCA_MODEL`, and absent that the request is refused with an actionable
 * message rather than sent to a name nobody verified. There is no built-in default model id here for
 * the same reason the catalog filters strictly: a plausible name is not a callable model.
 */
import type { Message } from '../core/session.js';
import type { ISummarizer } from '../core/summarization.js';
export interface OrcaRouterSummarizerOptions {
    /** A model id from the OrcaRouter catalog. Required unless the env var supplies one. */
    readonly model?: string;
    readonly timeoutMs?: number;
    readonly fetchImpl?: typeof fetch;
    readonly env?: NodeJS.ProcessEnv;
}
export declare class OrcaRouterSummarizer implements ISummarizer {
    private readonly model;
    private readonly timeoutMs;
    private readonly fetchImpl;
    private readonly env;
    constructor(options?: OrcaRouterSummarizerOptions);
    summarize(messages: readonly Message[]): Promise<string>;
}
/**
 * The model the user selected for optimizer-internal calls, if any.
 *
 * Read separately from construction so `createSummarizerFromEnv()` can decide whether this adapter
 * is usable before it tries to build one.
 */
export declare function configuredOrcaModel(env?: NodeJS.ProcessEnv): string | null;
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