/** Attribute used to identify an installed Pygmalion pre-mount runtime. */
export declare const PYGMALION_STORYBOARD_RUNTIME_ATTRIBUTE: string;

/**
 * Inline script source for hosts whose bundler cannot run the Pygmalion Vite
 * HTML plugin. Render it before application scripts on every previewable route.
 */
export declare function storyboardEnvironmentBootstrapSource(): string;