/**
 * Pluggable per-framework SSR contract.
 *
 * `renderToString` takes whatever shape the framework's JSX pragma
 * produces (Preact's VNode, React's element, etc.) and returns a string
 * of HTML. The runtime treats both the input and the return value as
 * opaque — it neither inspects the vnode nor escapes the output.
 */
export interface FrameworkAdapter {
    /**
     * Render a JSX vnode to an HTML string. Must be synchronous; SSR
     * happens inside a Hono request handler that resolves the response
     * body in one step.
     */
    renderToString: (vnode: unknown) => string;
}