@yohangel / auth-express

1.0.0 ▾

1.0.0

MIT

GitHub

Better Auth pour Express 5 : monte les routes d’auth et protège les API avec requireAuth

Code3 fichiersContexte~405 tokensanalyse réussie

Installer

$genpm add @yohangel/auth-express

Ce que vous obtenez

Source dans src/lib/auth-express/, 3 fichiers. (4,3 ko)
Règles IA dans src/lib/auth-express/AGENTS.md, plus les fichiers de règles de l’IDE.
Résout @yohangel/auth pour vous.

README

Ce paquet n’a pas de README.

~405 tokens→ src/lib/auth-express/AGENTS.md→ .cursor/rules/genpm-yohangel-auth-express.mdc

Voici exactement ce que lit votre IA quand elle travaille dans src/lib/auth-express. Rien d’autre n’est ajouté à son contexte.

@yohangel/auth-express — rules for AI agents

Purpose

Connects @yohangel/auth to Express 5: mounts Better Auth on /api/auth/* and provides requireAuth / optionalAuth middleware that put the session in res.locals.

Module map

index.ts — mountAuth(app, opts), requireAuth, optionalAuth, AuthLocals type, createAuth re-export.

Integration (do this after installing)

Order matters — mount auth BEFORE body parsers:

import express from 'express';
import { mountAuth, requireAuth } from './lib/auth-express/index.js';
const app = express();
mountAuth(app, { sendEmail });          // /api/auth/*
app.use(express.json());
app.get('/api/me', requireAuth, (req, res) => res.json({ id: res.locals.user.id }));

Frontend on another origin: app.use(cors({ origin: ['https://app.example.com'], credentials: true })) before mountAuth, and list that origin in AUTH_TRUSTED_ORIGINS.
Behind a proxy/CDN set app.set('trust proxy', 1) and AUTH_IP_HEADER so rate limits use the real client IP.
Express 4 is not supported (route syntax *splat is Express 5). Project must be ESM ("type": "module").

Conventions

Protect routes with requireAuth; read res.locals.user / res.locals.session (typed by AuthLocals).
Authorization (who can do what) goes in your handlers after requireAuth, never on the client.

Don't

Don't put express.json() before mountAuth (Better Auth must read the raw body).
Don't use cors({ origin: '*', credentials: true }).
Don't return res.locals.session (contains the token) to the client.

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

## Purpose
Connects `@yohangel/auth` to Express 5: mounts Better Auth on `/api/auth/*` and provides `requireAuth` / `optionalAuth` middleware that put the session in `res.locals`.

## Module map
- `index.ts` — `mountAuth(app, opts)`, `requireAuth`, `optionalAuth`, `AuthLocals` type, `createAuth` re-export.

## Integration (do this after installing)
1. Order matters — mount auth BEFORE body parsers:
   ```ts
   import express from 'express';
   import { mountAuth, requireAuth } from './lib/auth-express/index.js';
   const app = express();
   mountAuth(app, { sendEmail });          // /api/auth/*
   app.use(express.json());
   app.get('/api/me', requireAuth, (req, res) => res.json({ id: res.locals.user.id }));
   ```
2. Frontend on another origin: `app.use(cors({ origin: ['https://app.example.com'], credentials: true }))` before `mountAuth`, and list that origin in `AUTH_TRUSTED_ORIGINS`.
3. Behind a proxy/CDN set `app.set('trust proxy', 1)` and `AUTH_IP_HEADER` so rate limits use the real client IP.
4. Express 4 is not supported (route syntax `*splat` is Express 5). Project must be ESM (`"type": "module"`).

## Conventions
- Protect routes with `requireAuth`; read `res.locals.user` / `res.locals.session` (typed by `AuthLocals`).
- Authorization (who can do what) goes in your handlers after `requireAuth`, never on the client.

## Don't
- Don't put `express.json()` before `mountAuth` (Better Auth must read the raw body).
- Don't use `cors({ origin: '*', credentials: true })`.
- Don't return `res.locals.session` (contains the token) to the client.