/**
 * OpenAI ChatGPT Apps domain verification challenge.
 *
 * The OpenAI Apps submission form requires us to prove control over the
 * MCP hostname (hemmabo-mcp-server.vercel.app) by serving a specific
 * verification token at:
 *
 *   https://<host>/.well-known/openai-apps-challenge
 *
 * The token is generated per-app by OpenAI when the developer enters
 * Domain verification on the MCP Server tab. It is not secret — it only
 * proves that whoever pushes code to this repo also controls the host.
 *
 * Returns the token as plain text. Same pattern as Google Search Console
 * site verification, GitHub Pages CNAME challenges, etc.
 */
import type { VercelRequest, VercelResponse } from "./_types.js";
export default function handler(req: VercelRequest, res: VercelResponse): VercelResponse;