astro/.changeset/plenty-keys-add.md

@astrojs/vercel
major

Remove the Vercel Edge adapter

@astrojs/vercel/serverless now supports Edge middleware, so a separate adapter for Edge itself (deploying your entire app to the edge) is no longer necessary. Please update your Astro config to reflect this change:

// astro.config.mjs
import { defineConfig } from 'astro/config';
- import vercel from '@astrojs/vercel/edge';
+ import vercel from '@astrojs/vercel/serverless';

export default defineConfig({
 output: 'server',
 adapter: vercel({
+    edgeMiddleware: true
 }),
});

This adapter had several known limitations and compatibility issues that prevented many people from using it in production. To reduce maintenance costs and because we have a better story with Serveless + Edge Middleware, we are removing the Edge adapter.