import { ThemeAppearance } from './appearance.js';
export interface BlockingScriptOptions {
    /** Valid theme IDs to accept. Defaults to VALID_THEMES from core. */
    validThemes?: readonly string[];
    /** Fallback theme when no preference is stored. Defaults to DEFAULT_THEME from core. */
    defaultTheme?: string;
    /** localStorage key for the active theme. Defaults to STORAGE_KEY from core. */
    storageKey?: string;
    /** Legacy localStorage keys to migrate from. Defaults to LEGACY_STORAGE_KEYS from core. */
    legacyKeys?: readonly string[];
    /** Light/dark mapping per theme ID. Defaults to THEME_APPEARANCES from core. */
    themeAppearances?: Readonly<Record<string, ThemeAppearance>>;
}
/**
 * Generates a self-contained inline IIFE that prevents FOUC. It:
 * 1. Migrates legacy storage keys to the current `storageKey`
 * 2. Reads and validates the stored theme against the allowlist
 * 3. Sets `data-theme`, `data-appearance`, and the `theme-{id}` class on `<html>`
 * 4. Sets `window.__INITIAL_THEME__` so `initTheme` can short-circuit
 * 5. Updates the existing CSS `<link>` href when the theme is non-default
 *
 * The body uses readable identifiers; the bundler/gzip handles size. The
 * outer try/catch keeps the page from breaking when localStorage throws
 * (e.g. private browsing).
 */
export declare function generateBlockingScript(options?: BlockingScriptOptions): string;
//# sourceMappingURL=blocking-script.d.ts.map