diff --git a/.eslintrc.json b/.eslintrc.json
deleted file mode 100644
index f18272b..0000000
--- a/.eslintrc.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "extends": "next/core-web-vitals"
-}
-
diff --git a/app/components/premium/AnalysisPreview.tsx b/app/components/premium/AnalysisPreview.tsx
index b8a8aac..e12035a 100644
--- a/app/components/premium/AnalysisPreview.tsx
+++ b/app/components/premium/AnalysisPreview.tsx
@@ -20,13 +20,13 @@ export function AnalysisPreview() {
           <div className="space-y-4 text-slate-200 leading-relaxed">
             <p>Excited to announce our team is growing!</p>
             <p className="bg-purple-500/20 px-3 py-1 rounded-lg inline-block border border-purple-500/30">
-              We're tackling complex challenges in distributed systems
+              We&apos;re tackling complex challenges in distributed systems
             </p>
             <p>Looking for engineers who love diving deep into open-source projects and optimising for performance.</p>
             <p className="bg-purple-500/20 px-3 py-1 rounded-lg inline-block border border-purple-500/30">
-              If you're passionate about building resilient systems
+              If you&apos;re passionate about building resilient systems
             </p>
-            <p>and contributing to the community, let's chat.</p>
+            <p>and contributing to the community, let&apos;s chat.</p>
           </div>
         </div>
 
diff --git a/app/examples/ai-personas/page.tsx b/app/examples/ai-personas/page.tsx
index 7ba33f5..a16bdd1 100644
--- a/app/examples/ai-personas/page.tsx
+++ b/app/examples/ai-personas/page.tsx
@@ -784,7 +784,7 @@ export default function AIPersonasPage() {
                       </div>
                       <div className="tagList">
                         {getAllTags().length === 0 ? (
-                          <div className="tagEmpty">No tags yet. Add tags in "Edit persona".</div>
+                          <div className="tagEmpty">No tags yet. Add tags in &quot;Edit persona&quot;.</div>
                         ) : (
                           getAllTags().map(tag => (
                             <div
diff --git a/app/examples/gemini/page.tsx b/app/examples/gemini/page.tsx
index a026922..fe3e1ad 100644
--- a/app/examples/gemini/page.tsx
+++ b/app/examples/gemini/page.tsx
@@ -199,7 +199,7 @@ export default function GeminiTestPage() {
             <ul className="list-disc list-inside space-y-1 text-blue-700 dark:text-blue-300">
               <li>Select a model from the dropdown</li>
               <li>Enter your prompt in the text area</li>
-              <li>Click "Generate Response" to send the request</li>
+              <li>Click &quot;Generate Response&quot; to send the request</li>
               <li>The response will appear below</li>
             </ul>
           </div>
diff --git a/eslint.config.mjs b/eslint.config.mjs
new file mode 100644
index 0000000..da21304
--- /dev/null
+++ b/eslint.config.mjs
@@ -0,0 +1,30 @@
+import next from 'eslint-config-next/core-web-vitals'
+
+// ESLint 9 flat config for Next.js 16.
+// `next lint` was removed in Next 16, so linting runs via the ESLint CLI
+// (`eslint .` — see the "lint" script). eslint-config-next@16 ships native
+// flat-config arrays, so we import and spread them directly (no FlatCompat).
+// Replaces the legacy .eslintrc.json (`extends: next/core-web-vitals`).
+const eslintConfig = [
+  // Flat config replaces .eslintignore — list non-source paths here.
+  {
+    ignores: [
+      '.next/**',
+      'out/**',
+      'build/**',
+      'node_modules/**',
+      'next-env.d.ts',
+      // Python backend / ML training + virtualenv + archived code
+      'venv/**',
+      '.venv/**',
+      'ml_training/**',
+      'archive/**',
+      'output/**',
+      'data/**',
+      '**/*.py',
+    ],
+  },
+  ...next,
+]
+
+export default eslintConfig
diff --git a/package.json b/package.json
index 68f2837..3e11f98 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
     "dev:ml": "uvicorn api:app --reload --host 0.0.0.0 --port 8000",
     "build": "next build",
     "start": "next start",
-    "lint": "next lint",
+    "lint": "eslint .",
     "types:generate": "supabase gen types typescript --project-id YOUR_PROJECT_ID > types/supabase.ts || echo 'Install Supabase CLI and set your project ID to generate types'"
   },
   "repository": {