import type { Brain } from "../core/types.js";
import { type StreamEngineConfig } from "./stream-engine.js";
export interface OpenResponsesBrainConfig extends StreamEngineConfig {
    /** Base URL of the Open Responses endpoint, WITHOUT the trailing `/responses`. Overridden by `model.baseUrl`. */
    baseUrl?: string;
    /** API key. Overridden by per-call `options.apiKey`. */
    apiKey?: string;
    /** Extra headers merged into every request (auth + content-type are hard-locked after the merge). */
    headers?: Record<string, string>;
    /** Inject a custom fetch (tests / proxies); the default transport and the `fetchImpl` seat are
     *  `resolveFetch` (transport.ts). */
    fetchImpl?: typeof fetch;
    /**
     * Replay prior assistant reasoning items back to the endpoint on the turns that carry tool calls
     * (see the file header — an endpoint in thinking mode REQUIRES it there and ignores it elsewhere).
     * **On by default.** Set `false` only for an endpoint that rejects the `reasoning` input item;
     * with it off, a thinking-mode endpoint refuses every replayed tool-call turn.
     */
    replayReasoning?: boolean;
    /**
     * Detect **degenerate repetition** (the model looping on the same char/phrase forever) mid-stream
     * and cut it off — the turn ends `error` (`errorKind:"degenerate"`) so the loop stops paying.
     * Default true. Same detector, same cadence, same salvage rules as the other two lanes.
     */
    detectRepetition?: boolean;
}
/**
 * Create a Brain that talks to an Open Responses endpoint. See the file header for the stateless
 * invariant, the capability-audit posture, and the reasoning-replay rule.
 */
export declare function createOpenResponsesBrain(given?: OpenResponsesBrainConfig): Brain;