Try middleware

there's no route specific middlewares right? i only want this for one route

oh there's config const

export const config = {
matcher: ['/:id*']
}

is what i have for the middleware to only work for app/[id]/page.tsx, but it seems to catch other routes as well

well, your matcher needs to be a lot stricter than that. i don't really remember how to write matchers, nor do i know regex well enough, but middleware doesn't know about your app routing structure. it doesn't know there is a dynamic route app/[id]/page.tsx. it only knows there is an incoming request and the request has a particular pathname that's all

you need to e.g. exclude /_next requests, exclude static file requests, exclude other pages, etc. all kind of things