import type { TransportContext } from "./headers.js";
/** Hint passed to the owner-supplied HTTP fallback callback. */
export type FallbackFetchContext = {
    /** Set only for typed replay-safe `previous_response_not_found` owner fallback. */
    clearPreviousResponseId?: boolean;
};
type FallbackFetch = (signal: AbortSignal, context?: FallbackFetchContext) => Promise<Response>;
/** Fixed-cardinality active bridge count for tests (no session IDs). */
export declare function activeBridgeStreamCountForTesting(): number;
/** Abort active bridge turns for a session (hashed identity; idempotent). */
export declare function abortBridgeStreamsForSession(sessionID: string, reason?: unknown): void;
/** Abort every active bridge turn (idempotent). */
export declare function abortAllBridgeStreams(reason?: unknown): void;
export declare function bridgeWebSocket(wsUrl: string, headers: Record<string, string>, requestBody: Record<string, unknown>, isOAuth: boolean, context?: TransportContext, signal?: AbortSignal, fallbackFetch?: FallbackFetch): Response;
export {};
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