export interface VoicePreference {
    name: string;
    provider: string;
}
export interface DemoConfig {
    projectSlug: string;
    cloudDemoId?: string;
    voicePreference?: VoicePreference;
}
export declare function readDemoConfig(projectDir: string): DemoConfig | null;
export declare function writeDemoConfig(projectDir: string, config: DemoConfig): void;
export declare function getDemoVoicePreference(projectDir: string): VoicePreference | null;
export declare function setDemoVoicePreference(projectDir: string, voice: VoicePreference): void;
export declare function ensureProjectSlug(projectDir: string): string;
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