export interface TransformResult {
    html: string;
    /** Detected entry point src value, e.g. "./src/main.tsx". Null if none found. */
    entryScript: string | null;
}
/**
 * Transform an HTML file for the actjs dev server:
 * 1. Rewrite <script type="module" src="./main.tsx"> → /__actjs_bundle.js
 * 2. Inject HMR overlay + client before </head>
 */
export declare function transformHtml(rawHtml: string): TransformResult;