astro/.changeset/weak-dancers-beam.md

@astrojs/vercel
minor

Deprecates the functionPerRoute option

This option is now deprecated, and will be removed entirely in Astro v5.0. We suggest removing this option from your configuration as soon as you are able to:

import { defineConfig } from 'astro/config';
import vercel from '@astrojs/vercel/serverless';

export default defineConfig({
  // ...
  output: 'server',
  adapter: vercel({
-     functionPerRoute: true,
  }),
});