import type { PipelineBus } from "./pipeline-bus.js";
import type { ModeSwitchRequestedPacket } from "./packets.js";
import { type InitStep as InitStepType } from "./init-chain.js";
export interface ModeSwitchHandlers {
    /** Steps to run when switching from text to audio mode. */
    textToAudioSteps: InitStepType[];
    /** Steps to run when switching from audio to text mode (teardown). */
    audioToTextCleanups: Array<() => Promise<void>>;
}
export declare class ModeSwitcher {
    private currentMode;
    private readonly bus;
    private handlers;
    constructor(bus: PipelineBus, initialMode?: "text" | "audio");
    /** Register the init/teardown steps. Call once during session setup. */
    register(handlers: ModeSwitchHandlers): void;
    /** Get the current mode. */
    get mode(): "text" | "audio";
    /** Handle a mode switch request from the bus. */
    handleSwitchRequested(pkt: ModeSwitchRequestedPacket): Promise<void>;
    private switchToAudio;
    private switchToText;
}
//# sourceMappingURL=mode-switcher.d.ts.map