/**
 * @celsian/vura-vite-plugin
 *
 * Vite plugin for Vura that:
 * 1. Adds dev middleware for API routes via CelsianApp.handle (A1.3)
 * 2. Adds dev middleware for ALL four page modes (static, server, hybrid, client),
 *    matching the production build and the standalone dev server:
 *      - static — SSR'd fresh per request (live reload; zero client JS)
 *      - server — SSR'd per request with getServerData
 *      - hybrid — SSR'd + client bundle for hydration
 *      - client — SPA shell + client bundle (boots in the browser)
 * 3. Serves on-demand client/hybrid browser bundles at /_then/pages/*.js
 *    (esbuild, mirroring the `vura build` output layout)
 * 4. Adds dev middleware for task management (/__tasks/*)
 * 5. Runs app middleware and server actions with browser fetch stubs
 * 6. Watches src/ for file changes and hot-reloads routes and browser bundles
 * 7. Scans file-based routes on startup
 */
import type { Plugin } from 'vite';
export interface ThenPluginOptions {
    /** Project root (default: process.cwd()) */
    root?: string;
}
type TaskAdminHeaders = {
    authorization?: string | string[];
};
export declare function isTaskAdminRequestAuthorized(headers: TaskAdminHeaders, remoteAddress: string | undefined, env?: {
    THEN_TASK_SECRET?: string;
    NODE_ENV?: string;
}): boolean;
export declare function thenPlugin(options?: ThenPluginOptions): Plugin;
export default thenPlugin;
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