import { SSEEvent } from '../models/types';
/**
 * Thrown when the chat endpoint rejects the session token (401/403).
 * `<eo-chat>` catches this specifically to trigger a silent one-shot re-auth
 * instead of surfacing a generic error to the user.
 */
export declare class TokenRejectedError extends Error {
    constructor(message?: string);
}
/**
 * Thrown when the chat endpoint refuses with 403 `CONSENT_REQUIRED` — the
 * token is VALID; the doctor's consent is missing (server-side enforcement
 * with stale local state). `<eo-chat>` must NOT clear the token nor retry:
 * the root swaps to the consent screen instead (spec §2.5).
 */
export declare class ConsentRequiredError extends Error {
    constructor(message?: string);
}
export declare class ChatService {
    private apiUrl;
    constructor(apiUrl: string);
    /**
     * Sends a message to the chat endpoint and yields SSEEvents from the stream.
     * The agent decides mode autonomously — no `mode` field in the request.
     * Pass an AbortSignal to cancel an in-flight stream (e.g. on drawer close).
     *
     * @throws TokenRejectedError if the server returns 401/403 — caller should re-auth and retry once.
     * @throws Error for any other non-ok response or network failure.
     */
    sendMessage(token: string, message: string, signal?: AbortSignal): AsyncGenerator<SSEEvent>;
}