@yohangel / auth-next

1.0.0 ▾

1.0.0

MIT

GitHub

Next.js App Router용 Better Auth: 라우트 핸들러, proxy 리디렉션, 서버 세션

코드파일 5개컨텍스트약 545토큰검사 통과

약 545토큰→ src/lib/auth-next/AGENTS.md→ .cursor/rules/genpm-yohangel-auth-next.mdc

이것이 AI가 src/lib/auth-next에서 작업할 때 읽는 내용 그대로입니다. 그 외에는 컨텍스트에 아무것도 추가되지 않습니다.

@yohangel/auth-next — rules for AI agents

Purpose

Connects @yohangel/auth to the Next.js App Router (Next 15/16): the /api/auth/* route handler, optimistic redirects in proxy.ts, and server-side session helpers. For forms and useSession, also install @yohangel/auth-react.

Module map

index.ts — public API.
server.ts — auth (instance with nextCookies()), authRouteHandlers, currentSession(), requireSession(signInPath, next), createNextAuth(opts).
proxy.ts — authProxy({ protect, signInPath }) and safeNext(next).

Integration (do this after installing)

Route handler — create app/api/auth/[...all]/route.ts (or src/app/...):

import { authRouteHandlers } from '@/lib/auth-next';
export const { GET, POST } = authRouteHandlers;

Edge redirects — create proxy.ts at the project root (Next 16; on Next 15 name it middleware.ts and export middleware):

import { authProxy } from '@/lib/auth-next';
export const proxy = authProxy({ protect: ['/dashboard', '/settings'], signInPath: '/sign-in' });
export const config = { matcher: ['/dashboard/:path*', '/settings/:path*'] };

In every private page, layout, Route Handler and Server Action, check for real: const { user } = await requireSession('/sign-in', '/dashboard');.
Sign-in page: render SignInForm from @yohangel/auth-react with redirectTo={safeNext(searchParams.next)}.
Need emails or extra plugins? Edit server.ts: export const auth = createNextAuth({ sendEmail, plugins: [...] }) — nextCookies() is appended last automatically.

Conventions

Import the instance from this package (auth), never call createAuth again elsewhere in a Next app.
Server Components read the session with currentSession(); pass only the fields the client needs (never the session token).

Don't

Don't treat proxy.ts as authorization: it only checks that a cookie exists. Always call requireSession() / currentSession() on the server.
Don't redirect to ?next= values without safeNext() (open redirect).
Don't expose auth.api calls in Client Components; they run on the server only.

# @yohangel/auth-next — rules for AI agents

## Purpose
Connects `@yohangel/auth` to the Next.js App Router (Next 15/16): the `/api/auth/*` route handler, optimistic redirects in `proxy.ts`, and server-side session helpers. For forms and `useSession`, also install `@yohangel/auth-react`.

## Module map
- `index.ts` — public API.
- `server.ts` — `auth` (instance with `nextCookies()`), `authRouteHandlers`, `currentSession()`, `requireSession(signInPath, next)`, `createNextAuth(opts)`.
- `proxy.ts` — `authProxy({ protect, signInPath })` and `safeNext(next)`.

## Integration (do this after installing)
1. Route handler — create `app/api/auth/[...all]/route.ts` (or `src/app/...`):
   ```ts
   import { authRouteHandlers } from '@/lib/auth-next';
   export const { GET, POST } = authRouteHandlers;
   ```
2. Edge redirects — create `proxy.ts` at the project root (Next 16; on Next 15 name it `middleware.ts` and export `middleware`):
   ```ts
   import { authProxy } from '@/lib/auth-next';
   export const proxy = authProxy({ protect: ['/dashboard', '/settings'], signInPath: '/sign-in' });
   export const config = { matcher: ['/dashboard/:path*', '/settings/:path*'] };
   ```
3. In every private page, layout, Route Handler and Server Action, check for real: `const { user } = await requireSession('/sign-in', '/dashboard');`.
4. Sign-in page: render `SignInForm` from `@yohangel/auth-react` with `redirectTo={safeNext(searchParams.next)}`.
5. Need emails or extra plugins? Edit `server.ts`: `export const auth = createNextAuth({ sendEmail, plugins: [...] })` — `nextCookies()` is appended last automatically.

## Conventions
- Import the instance from this package (`auth`), never call `createAuth` again elsewhere in a Next app.
- Server Components read the session with `currentSession()`; pass only the fields the client needs (never the session token).

## Don't
- Don't treat `proxy.ts` as authorization: it only checks that a cookie exists. Always call `requireSession()` / `currentSession()` on the server.
- Don't redirect to `?next=` values without `safeNext()` (open redirect).
- Don't expose `auth.api` calls in Client Components; they run on the server only.

.genpmignore 적용 후 주입될 정확한 트리입니다. 고정 대상:

src/lib/auth-next/LICENSE읽기 전용 · 7145b9d

MIT License

Copyright (c) 2026 Yohangel

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.