import { type SessionInput, type SessionProjection } from "#protocol/session-projection.js";
/**
 * The request a typed reply answers: the first open request nobody has answered yet. A budget
 * prompt comes first, since the session settles it before anything else; the rest follow the
 * order of the session's `input.requested` events. Channels that can only show text show this
 * request alone, so a reply answers the request the person sees.
 */
export declare function firstOpenInput(projection: SessionProjection, answered?: (requestId: string) => boolean): SessionInput | undefined;