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## What
Removes the Next.js compatibility shim layer that the ElysiaJS backend
migration (#1630) introduced, replacing it with standard Web APIs and
de-aliased local runtime helpers. Addresses N2D4's review note on #1630:
> i think we should create a followup PR which cleans these up and uses
the elysia methods directly — so we don't need a nextjs compat layer
forever
Stacked on `migrate-backend-to-elysiajs`.
## Changes
**`next/server` → standard Web APIs (eliminated)**
- `NextRequest` → `Request`, `NextResponse.json()` → `Response.json()`,
`new NextResponse(...)` → `new Response(...)`, `req.nextUrl` → `new
URL(req.url)`
- Hot path (`smart-route-handler`) computes `const requestUrl = new
URL(req.url)` once
- Deleted `lib/next-compat/server.tsx`; rewrote
`server/next-request-shim.ts` → `server/backend-request.ts`
(`createBackendRequest`, returns a plain `Request`)
**`next/headers` + `next/navigation` → `lib/runtime/` (de-aliased)**
- `git mv`'d the real runtime helpers (`headers`, `navigation`,
`request-context`) out of `lib/next-compat/` into `lib/runtime/`,
repointing all consumers to `@/lib/runtime/*`
- The cookie/header/redirect mechanism (AsyncLocalStorage + thrown
redirect errors, driven by `app.ts`) is unchanged — it was only *named*
after Next, never actually Next
**Config + cleanup**
- Dropped the `next/*` path aliases from `tsconfig.json`,
`vitest.config.ts`, `tsdown.config.ts` (removed `nextCompatPlugin`, the
alias map, and the `next` bundling special-case)
- Deleted `fetch.d.ts` and removed the no-op `next: { revalidate }`
fetch option in `changelog/route.tsx` (caching never worked outside the
Next runtime)
- Converted the unreferenced `proxy.tsx` so it still compiles (it's dead
code superseded by `server/middleware.ts` — deletion candidate, left out
of this PR)
No `next/*` imports remain in the backend.
## Verification
- `tsc --noEmit` — passes (exit 0)
- `eslint` on all changed files — clean
## Notes / not in scope
- This removes the **`next/*` façade**. It keeps the underlying
ALS-based request-context mechanism rather than threading Elysia's
native context (`set.cookie`, `set.redirect`) into every handler —
that's a much larger change touching handler signatures across the whole
API surface.
- One internal redirect digest string is still `"NEXT_REDIRECT"`
(matched in both `navigation.tsx` and `app.ts`); renamable but cosmetic.
<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Remove the `next/*` compatibility layer and switch the backend to
standard Web APIs. This simplifies handlers and config while keeping the
ALS request context and redirect behavior unchanged.
- **Refactors**
- Replaced `NextRequest`/`NextResponse` and `req.nextUrl` with
`Request`/`Response` and `new URL(req.url)` across handlers, proxies,
health/unsubscribe routes, and IDP endpoints.
- Moved runtime helpers to `@/lib/runtime/*` (`headers`, `navigation`,
`request-context`) and updated imports.
- Added `server/backend-request.ts` to build backend `Request`s with
merged headers; removed `server/next-request-shim.ts` and
`lib/next-compat/server.tsx`.
- Updated proxy rewrite to set `x-middleware-rewrite`; IDP routes now
return `Response` directly with 307/308 mapping.
- Removed the `next:{revalidate}` fetch option; deleted
`lib/next-compat/fetch.d.ts`.
- Dropped `next/*` aliases from `tsconfig`, `tsdown`, and `vitest`;
route registry/types now use `Request`.
- **Migration**
- Import from `@/lib/runtime/headers` and `@/lib/runtime/navigation`
instead of `next/headers` and `next/navigation`.
- Route handlers should accept `Request` and use `new URL(req.url)` for
URL parsing.
<sup>Written for commit
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|---|---|---|
| .. | ||
| api | ||
| prisma | ||
| scripts | ||
| src | ||
| .env | ||
| .env.development | ||
| .eslintrc.cjs | ||
| .gitignore | ||
| instrumentation-client.ts | ||
| LICENSE | ||
| package.json | ||
| prisma.config.ts | ||
| tsconfig.json | ||
| tsdown.config.ts | ||
| vercel.json | ||
| vitest.config.ts | ||
| vitest.setup.ts | ||
