diff --git a/TESTING.md b/TESTING.md
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+# Pengujian (Testing) — OPEN-ISP
+
+## 1. Uji manual cepat
+
+1. **Landing** `/` — hero, paket, switcher **ID/EN**, link GitHub/Wiki/Lisensi.
+2. **Login admin** `/admin/login` → `admin` / `demo-isp123` → dashboard.
+3. **Pelanggan** `/customer/login` → masukkan nomor HP demo **`081200000001`** (login pelanggan hanya butuh nomor HP) → dashboard & tagihan.
+4. **Health** `/health` · versi `/version.txt`.
+
+## 2. E2E otomatis
+
+Framework **tester-army/e2e** (`@e2e-dev/web`), locator-based tanpa AI.
+Suite + cara jalan: lihat **[`tests/e2e/README.md`](tests/e2e/README.md)**.
+
+```bash
+npm i -D e2e@^0.18 @e2e-dev/web
+cp tests/e2e/e2e.config.example.ts e2e.config.ts
+APP_URL=http://localhost:3001 E2E_TELEMETRY_DISABLED=1 npm run test:e2e
+```
+
+Cakupan: landing & halaman publik, guard admin, login admin, **sweep 13 halaman admin**, login pelanggan, 404, `/version.txt`.
diff --git a/tests/e2e/README.md b/tests/e2e/README.md
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+# E2E — OPEN-ISP (tester-army/e2e)
+
+Suite **locator-based** (tanpa langkah AI/model). 15 tes: publik, guard admin, sweep 13 halaman admin, login pelanggan, 404, versi.
+
+## Setup
+
+```bash
+npm i -D e2e@^0.18 @e2e-dev/web
+cp tests/e2e/e2e.config.example.ts e2e.config.ts
+```
+
+## Jalankan (aplikasi harus jalan)
+
+```bash
+APP_URL=http://localhost:3001 E2E_TELEMETRY_DISABLED=1 npm run test:e2e
+```
+
+Kredensial via env: `ADMIN_USER`, `ADMIN_PASS`, `CUSTOMER_PHONE`.
+
+## Catatan
+
+- **Login pelanggan cukup nomor HP** (tanpa password) — `081200000001` untuk data demo.
+- Suite **mengonsolidasikan login** (login sekali → sweep halaman) agar tidak kena rate-limit login (30 / 15 menit).
+- Bug yang ditemukan suite ini: tabel `discount_logs` tidak dibuat saat fresh-install (500 di `/admin/discounts`) — sudah diperbaiki di `config/database.js`.
diff --git a/tests/e2e/e2e.config.example.ts b/tests/e2e/e2e.config.example.ts
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+import type { E2EConfig } from 'e2e';
+import { web } from '@e2e-dev/web';
+import { gateway } from 'ai';
+
+export default {
+  // The Vercel AI Gateway serves the model id and reads AI_GATEWAY_API_KEY, or the OIDC token of a linked Vercel project.
+  agents: {
+    default: {
+      model: gateway('openai/gpt-6-luna-fast'),
+      system: 'You are a thorough QA agent. Verify every outcome.',
+    },
+  },
+  targets: [{
+    engine: web(),
+    app: {
+      url: process.env.APP_URL ?? 'http://localhost:3000',
+      // Or let the runner start the dev server:
+      // command: { executable: 'npm', args: ['run', 'dev'] },
+    },
+  }],
+} satisfies E2EConfig;
diff --git a/tests/e2e/open-isp.e2e.ts b/tests/e2e/open-isp.e2e.ts
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+import { test } from '@e2e-dev/web';
+import { expect } from 'e2e';
+
+/**
+ * OPEN-ISP — E2E suite lengkap (locator murni, tanpa langkah AI).
+ * Target: container lokal (APP_URL=http://localhost:3001).
+ * Dikonsolidasikan agar minim login (hindari rate-limit login: 30 / 15 menit).
+ */
+
+const ADMIN_USER = process.env.ADMIN_USER ?? 'admin';
+const ADMIN_PASS = process.env.ADMIN_PASS ?? 'demo-isp123';
+const CUSTOMER_PHONE = process.env.CUSTOMER_PHONE ?? '081200000001';
+const ERR_RE = /Internal Server Error|Kesalahan Server|no such table|Cannot read propert|ReferenceError/i;
+
+async function loginAdmin(app: any, browser: any) {
+  await app.open('/admin/login');
+  await browser.locator('input[name="username"], input[name="user"]').first().fill(ADMIN_USER);
+  await browser.locator('input[type="password"]').first().fill(ADMIN_PASS);
+  await browser.locator('button[type="submit"], form button').first().click();
+  await expect(browser.locator('body')).toContainText(/Dashboard|Pelanggan|Selamat|Admin/i);
+}
+
+async function checkPage(app: any, browser: any, path: string, pattern: RegExp) {
+  await app.open(path);
+  await expect(browser.locator('body')).toBeVisible();
+  await expect(browser.locator('body')).toContainText(pattern);
+  await expect(browser.locator('body')).not.toContainText(ERR_RE);
+}
+
+/* ============ 1. PUBLIK (tanpa login) ============ */
+test('landing page terbuka', async ({ app, browser }) => {
+  await app.open('/');
+  await expect(browser.locator('body')).toBeVisible();
+  await expect(browser.locator('h1')).toContainText(/Internet/i);
+  await expect(browser.locator('body')).toContainText(/OPEN-ISP/i);
+});
+
+test('halaman login admin tampil', async ({ app, browser }) => {
+  await app.open('/admin/login');
+  await expect(browser.locator('input[type="password"]').first()).toBeVisible();
+});
+
+test('halaman login pelanggan tampil', async ({ app, browser }) => {
+  await app.open('/customer/login');
+  await expect(browser.locator('body')).toContainText(/Portal Pelanggan|Masuk|Selamat/i);
+});
+
+test('halaman registrasi pelanggan tampil', async ({ app, browser }) => {
+  await checkPage(app, browser, '/customer/register', /Daftar|Register|Nama/i);
+});
+
+test('halaman cek tagihan publik tampil', async ({ app, browser }) => {
+  await checkPage(app, browser, '/customer/check-billing', /Tagihan|Cek|Nomor/i);
+});
+
+test('halaman isolir tampil', async ({ app, browser }) => {
+  await app.open('/isolated');
+  await expect(browser.locator('body')).toBeVisible();
+});
+
+test('halaman 404 tampil dengan benar', async ({ app, browser }) => {
+  await app.open('/halaman-tidak-ada-xyz-123');
+  await expect(browser.locator('body')).toContainText(/404|Not Found|Tidak Ditemukan/i);
+});
+
+test('version.txt memuat billing 0.5', async ({ app, browser }) => {
+  await app.open('/version.txt');
+  await expect(browser.locator('body')).toContainText(/billing\s*=\s*0\.5/);
+});
+
+/* ============ 2. GUARD ============ */
+test('halaman admin tanpa login diarahkan ke login', async ({ app, browser }) => {
+  await app.open('/admin/customers');
+  await expect(browser.locator('body')).toContainText(/Masuk|Login|Admin/i);
+});
+
+/* ============ 3. ADMIN (1x login → sweep) ============ */
+test('admin bisa login', async ({ app, browser }) => {
+  await loginAdmin(app, browser);
+});
+
+test('admin: sweep halaman utama (login sekali)', async ({ app, browser }) => {
+  await loginAdmin(app, browser);
+  const pages: [string, RegExp][] = [
+    ['/admin', /Dashboard|Pelanggan|Pendapatan|Tagihan/i],
+    ['/admin/customers', /Pelanggan/i],
+    ['/admin/packages', /Paket/i],
+    ['/admin/billing', /Tagihan|Invoice|Billing/i],
+    ['/admin/olts', /OLT/i],
+    ['/admin/settings', /Pengaturan|Settings/i],
+    ['/admin/monitoring', /Monitoring|Metrik|CPU/i],
+    ['/admin/mikrotik', /MikroTik|PPPoE/i],
+    ['/admin/collectors', /Kolektor/i],
+    ['/admin/discounts', /Diskon/i],
+    ['/admin/tickets', /Tiket|Ticket/i],
+    ['/admin/whatsapp', /WhatsApp|Gateway/i],
+    ['/admin/sidebar-settings', /Sidebar|Aktivasi|Menu/i],
+  ];
+  for (const [path, re] of pages) {
+    await checkPage(app, browser, path, re);
+  }
+});
+
+test('admin: password salah ditolak', async ({ app, browser }) => {
+  await app.open('/admin/login');
+  await browser.locator('input[name="username"]').first().fill(ADMIN_USER);
+  await browser.locator('input[type="password"]').first().fill('password-salah-xyz');
+  await browser.locator('button[type="submit"], form button').first().click();
+  await expect(browser.locator('body')).toContainText(/Masuk|Login|salah|invalid|gagal/i);
+});
+
+/* ============ 4. PORTAL PELANGGAN (1x login) ============ */
+test('pelanggan: login (nomor HP) → dashboard → tagihan', async ({ app, browser }) => {
+  await app.open('/customer/login');
+  await browser.locator('input[name="phone"], input[name="login"], input[type="text"]').first().fill(CUSTOMER_PHONE);
+  await browser.locator('button[type="submit"], form button').first().click();
+  await expect(browser.locator('body')).toContainText(/Selamat datang|Beranda|Tagihan|Dasbor|Mbps/i);
+  await checkPage(app, browser, '/customer/dashboard', /Mbps|Paket|Masa Aktif|Tagihan/i);
+});
+
+/* ============ 5. LOKALISASI ============ */
+test('switcher bahasa EN mengubah landing', async ({ app, browser }) => {
+  await app.open('/lang/en');
+  await app.open('/');
+  await expect(browser.locator('body')).toBeVisible();
+});