/**
 * Speech model — text-to-speech through the browser's Web Speech API.
 * An app registers speakers (voice + rate/pitch/volume), the service
 * speaks text for one of them. The framework knows nothing about what a
 * speaker id means.
 */
/**
 * How a new announcement relates to what is already being spoken.
 * - `interrupt`: cancel everything and speak now (e.g. "your turn")
 * - `queue`: wait for the current speech to end (e.g. fellow statements)
 * - `idle`: only if nothing is speaking or waiting (hints, never urgent)
 */
export type SpeechPriority = "interrupt" | "queue" | "idle";
export interface SpeakerSettings {
    /** `SpeechSynthesisVoice.voiceURI`; unset or unknown → best voice for the locale. */
    voiceURI?: string;
    /** 0.5–2, 1 = normal. */
    rate: number;
    /** 0.5–1.5, 1 = normal. */
    pitch: number;
    /** 0–1. */
    volume: number;
}
export interface SpeakOptions {
    /** Registered speaker id; unknown or unset → default settings. */
    speaker?: string;
    /** Default `queue`. */
    priority?: SpeechPriority;
}
export declare const SPEECH_RATE_RANGE: readonly [number, number];
export declare const SPEECH_PITCH_RANGE: readonly [number, number];
export declare const DEFAULT_SPEAKER_SETTINGS: SpeakerSettings;
/** Longest chunk handed to the engine at once (Chrome cuts long utterances). */
export declare const SPEECH_CHUNK_MAX_LENGTH = 180;
/** A `say()` before the first gesture is kept this long and spoken after the unlock. */
export declare const SPEECH_PENDING_MAX_AGE_MS = 5000;
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