/**
 * core/transport.ts — Shared API backend delivery with transport abstraction.
 *
 * Centralises the voice-detection, TTS chunking, and response-routing logic
 * that every transport (Whazaa, Telex, …) needs when using the APIBackend.
 * Transports only provide two callbacks: sendText and sendVoice.
 */
import type { APIBackend } from "../backend/api.js";
/** Transport-provided callbacks for sending responses back to the user. */
export interface TransportCallbacks {
    /** Send a text message (already markdown-formatted by the transport). */
    sendText: (text: string) => Promise<unknown>;
    /** Send a single voice-note buffer (OGG Opus). transcript is for companion-app display. */
    sendVoice: (buffer: Buffer, transcript?: string) => Promise<unknown>;
}
/**
 * Deliver a message through the APIBackend and route the response back
 * via the appropriate transport channel (text or voice).
 *
 * Voice detection: if `message` contains `:voice]` (e.g. `[Whazaa:voice]`),
 * the response is synthesised to voice notes via Kokoro TTS and sent as
 * audio.  Otherwise it's sent as a plain text message.
 */
export declare function deliverViaApi(backend: APIBackend, message: string, sessionId: string, transport: TransportCallbacks): Promise<void>;
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