---
id: astro-edge-middleware-scope
title: Astro edge middleware scope
status: active
candidateKinds: ["middleware_heavy"]
frameworks: ["astro@*"]
priority: 88
citations:
  [
    "https://vercel.com/docs/frameworks/frontend/astro",
    "https://docs.astro.build/en/guides/integrations-guide/vercel/",
  ]
maxBriefChars: 800
---

## Investigation Brief

Astro middleware can run at the edge for broad request sets. If middleware volume is high, prove which paths actually need interception.

## Evidence To Check

Use middleware invocation share and top paths. Inspect adapter middleware mode, middleware source, auth/redirect logic, and whether static assets, prerendered pages, or public pages are being intercepted.

## Do Not Recommend When

Do not bypass required auth, locale, header, or routing logic. Do not move global middleware work into every page when the current scope is already minimal.

## Verification

Name the middleware share, dominant paths, current middleware mode, and exact source or config line to narrow.