vercel.json

{
  "$schema": "https://openapi.vercel.sh/vercel.json",
  "comment": "Vercel serves ONLY the static frontend (static/). The backend (API + SSE) lives on Render; set window.__API_BASE__ in static/config.js to the Render URL before deploying. Vercel cannot host the SSE stream itself (serverless functions can't hold long-lived connections) — see DEPLOYMENT.md.",
  "buildCommand": "echo 'no build — static files served as-is'",
  "outputDirectory": "static",
  "cleanUrls": true,
  "rewrites": [
    { "source": "/", "destination": "/index.html" }
  ]
}