diff --git a/Backend/docs/release-checklist.md b/Backend/docs/release-checklist.md
new file mode 100644
index 0000000..e53f070
--- /dev/null
+++ b/Backend/docs/release-checklist.md
@@ -0,0 +1,30 @@
+# Release Checklist (Phase 10)
+
+## Functional verification
+- [ ] Device registration and heartbeat flow works for both camera and client roles.
+- [ ] Camera-client linking and command dispatch/ack flows work end-to-end.
+- [ ] Motion start/end events are persisted and notify linked clients.
+- [ ] On-demand stream request/accept/end flow works with media credentials.
+- [ ] Recording placeholder creation, finalize, and download URL generation work.
+- [ ] Push fallback queue delivers notifications when realtime channel is offline.
+
+## Security and reliability
+- [ ] Rate limit thresholds validated in staging.
+- [ ] Audit logs capture stream/event/recording sensitive operations.
+- [ ] Env vars present: auth base URL, media provider, database, MinIO, secrets.
+- [ ] Worker loops running: recordings worker and push worker.
+
+## Observability
+- [ ] `/ops/live` and `/ops/ready` healthy.
+- [ ] `/ops/metrics` reports request counters and status counters.
+- [ ] Structured request logs are visible in deployment log sink.
+
+## Pre-release load and tests
+- [ ] Unit tests pass (`bun test`).
+- [ ] Smoke load script passes (`bun run load:smoke`).
+- [ ] Manual run with simulator in two tabs confirms camera+client happy path.
+
+## Rollout
+- [ ] Deploy to staging and run checklist above.
+- [ ] Rollout production gradually and watch error/status metrics.
+- [ ] Keep rollback procedure ready (previous image/version + migration compatibility).
diff --git a/Backend/package.json b/Backend/package.json
index 541ec08..1928bb5 100644
--- a/Backend/package.json
+++ b/Backend/package.json
@@ -39,6 +39,8 @@
   "scripts": {
     "start": "bun run index.ts",
     "dev": "bun --watch index.ts",
+    "test": "bun test",
+    "load:smoke": "bun run scripts/load-smoke.ts",
     "db:generate": "drizzle-kit generate",
     "db:migrate": "drizzle-kit migrate",
     "db:push": "drizzle-kit push",
diff --git a/Backend/public/mobile-sim.html b/Backend/public/mobile-sim.html
index ee43891..7f47e86 100644
--- a/Backend/public/mobile-sim.html
+++ b/Backend/public/mobile-sim.html
@@ -118,9 +118,19 @@
     <div class="page">
       <h1>Mobile Client Simulator</h1>
       <p>
-        Use this page like a phone app: register device role, connect socket with bearer device token, and run camera/client
-        actions. You must already be signed in via Better Auth in this browser session.
+        Use this page like a phone app: authenticate, register device role, connect socket with bearer device token, and run
+        camera/client actions.
       </p>
+      <section class="panel" style="margin-bottom:16px">
+        <h2>App-Like Onboarding Flow</h2>
+        <ol>
+          <li>Sign up/sign in in the <strong>Auth</strong> panel.</li>
+          <li>Pick role (<code>camera</code> or <code>client</code>) and register device.</li>
+          <li>Connect socket to become online.</li>
+          <li>Client links to camera, requests stream; camera accepts automatically via command handling.</li>
+          <li>Camera finalizes recording; client fetches download URL and polls push inbox when offline.</li>
+        </ol>
+      </section>
 
       <div class="grid">
         <section class="panel">
diff --git a/Backend/scripts/load-smoke.ts b/Backend/scripts/load-smoke.ts
new file mode 100644
index 0000000..14eb0e8
--- /dev/null
+++ b/Backend/scripts/load-smoke.ts
@@ -0,0 +1,26 @@
+const baseUrl = process.env.LOAD_BASE_URL ?? 'http://localhost:3000';
+const rounds = Number(process.env.LOAD_ROUNDS ?? 25);
+
+const run = async () => {
+  const start = Date.now();
+
+  for (let i = 0; i < rounds; i += 1) {
+    const [live, ready, metrics] = await Promise.all([
+      fetch(`${baseUrl}/ops/live`),
+      fetch(`${baseUrl}/ops/ready`),
+      fetch(`${baseUrl}/ops/metrics`),
+    ]);
+
+    if (!live.ok || !ready.ok || !metrics.ok) {
+      throw new Error(`Smoke load failed at round ${i + 1}`);
+    }
+  }
+
+  const totalMs = Date.now() - start;
+  console.log(`Completed ${rounds} rounds in ${totalMs}ms`);
+};
+
+run().catch((error) => {
+  console.error(error);
+  process.exit(1);
+});
diff --git a/Backend/tests/device-token.test.ts b/Backend/tests/device-token.test.ts
new file mode 100644
index 0000000..141aa69
--- /dev/null
+++ b/Backend/tests/device-token.test.ts
@@ -0,0 +1,24 @@
+import { describe, expect, test } from 'bun:test';
+
+import { createDeviceToken, verifyDeviceToken } from '../utils/device-token';
+
+describe('device token', () => {
+  test('roundtrips valid payload', () => {
+    const token = createDeviceToken({
+      userId: 'user-1',
+      deviceId: 'device-1',
+      role: 'client',
+    }, 60);
+
+    const payload = verifyDeviceToken(token);
+
+    expect(payload).not.toBeNull();
+    expect(payload?.userId).toBe('user-1');
+    expect(payload?.deviceId).toBe('device-1');
+    expect(payload?.role).toBe('client');
+  });
+
+  test('rejects malformed tokens', () => {
+    expect(verifyDeviceToken('bad-token')).toBeNull();
+  });
+});
diff --git a/Backend/tests/env.test.ts b/Backend/tests/env.test.ts
new file mode 100644
index 0000000..a9f6fd7
--- /dev/null
+++ b/Backend/tests/env.test.ts
@@ -0,0 +1,25 @@
+import { afterEach, describe, expect, test } from 'bun:test';
+
+import { getBetterAuthBaseUrl, getFirstDefinedEnv } from '../utils/env';
+
+const ORIGINAL_ENV = { ...process.env };
+
+afterEach(() => {
+  process.env = { ...ORIGINAL_ENV };
+});
+
+describe('env helpers', () => {
+  test('getFirstDefinedEnv returns first set value', () => {
+    process.env.TEST_A = '';
+    process.env.TEST_B = ' value-b ';
+
+    expect(getFirstDefinedEnv('TEST_A', 'TEST_B')).toBe('value-b');
+  });
+
+  test('getBetterAuthBaseUrl prefers BETTER_AUTH_BASE_URL over legacy var', () => {
+    process.env.BETTER_AUTH_BASE_URL = 'http://base-url:4000';
+    process.env.BETTER_AUTH_URL = 'http://legacy:3000';
+
+    expect(getBetterAuthBaseUrl()).toBe('http://base-url:4000');
+  });
+});