diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b5ed2b9f..613c1e2d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -181,6 +181,8 @@ jobs:
           Start-Sleep -Seconds 10
       - name: Install Playwright browsers
         run: npx playwright install chromium
+      - name: Reading Mode Test
+        run: npm run test:reading
       - name: VRT Test
         run: npm run test:vrt
       - name: Upload test results on failure
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 2dfd4ef7..bed76aa1 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -69,6 +69,17 @@ jobs:
             # Content update pushed to gh-pages. No Deploy dispatch here —
             # Promote merges main and dispatches Deploy (may run before or after us).
           fi
+      - name: Setup Node
+        uses: actions/setup-node@v7
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'npm'
+      - name: Install dependencies
+        run: npm ci --omit dev --ignore-scripts --prefer-offline
+      - name: Build site
+        run: npm run build
+      - name: Run readability test on built site
+        run: npm run test:reading
       - if: failure()
         uses: ./.github/actions/notify-failure
         with:
diff --git a/package.json b/package.json
index c32782d3..df5b39fe 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
     "test": "vitest run",
     "test:e2e": "vitest run --config vitest.config.e2e.ts",
     "test:vrt": "playwright test",
+    "test:reading": "playwright test",
     "test:vrt:update": "playwright test --update-snapshots",
     "verify:client-script": "node scripts/verify-client-script.mjs"
   },
diff --git a/scripts/run-readability-test.mjs b/scripts/run-readability-test.mjs
new file mode 100644
index 00000000..90c7d7d1
--- /dev/null
+++ b/scripts/run-readability-test.mjs
@@ -0,0 +1,39 @@
+// run-readability-test.mjs
+// This script starts a temporary static server for the built site (dist)
+// and runs the existing Playwright VRT test suite which includes the
+// readability compatibility checks.
+
+import { spawn } from 'child_process';
+import { setTimeout } from 'timers/promises';
+
+async function main() {
+  console.log('🚀 Starting static server for dist...');
+  // "serve" is invoked via npx; it will be fetched on‑the‑fly if not installed.
+  const server = spawn('npx', ['serve', 'dist', '-l', '5173'], {
+    stdio: 'inherit',
+    shell: true,
+  });
+
+  // Give the server a moment to start listening.
+  await setTimeout(5000);
+
+  try {
+    console.log('🧪 Running readability VRT tests...');
+    const test = spawn('npm', ['run', 'test:vrt'], {
+      stdio: 'inherit',
+      shell: true,
+    });
+    await new Promise((resolve, reject) => {
+      test.on('close', code => (code === 0 ? resolve() : reject(new Error(`test:vrt exited with code ${code}`))));
+    });
+  } finally {
+    console.log('🛑 Stopping static server');
+    // Ensure the server process is terminated even if the tests fail.
+    server.kill();
+  }
+}
+
+main().catch(err => {
+  console.error('❌ Readability CI script failed:', err);
+  process.exit(1);
+});
diff --git a/tests/e2e/readability.vrt.test.ts b/tests/e2e/readability.vrt.test.ts
new file mode 100644
index 00000000..89bc18a9
--- /dev/null
+++ b/tests/e2e/readability.vrt.test.ts
@@ -0,0 +1,22 @@
+import { expect, test } from '@playwright/test'
+
+const FIXTURE_ROUTES = [
+  '/essays/is-sqrt-of-squared-x-pm-x',
+  '/essays/scroll-depth-test',
+] as const
+
+test.describe('Readability compatibility tests', () => {
+  for (const route of FIXTURE_ROUTES) {
+    test(`should be readerable for ${route}`, async ({ page }) => {
+      await page.goto(route, { waitUntil: 'domcontentloaded' })
+
+      // Evaluate readability check within the browser context using CDN module import.
+      const isReadable = await page.evaluate(async () => {
+        const { isProbablyReaderable } = await import('https://cdn.jsdelivr.net/npm/@mozilla/readability@0.5.0/+esm')
+        return isProbablyReaderable(document)
+      })
+
+      expect(isReadable).toBe(true)
+    })
+  }
+})