diff --git a/.gitignore b/.gitignore
index 5c7663b..a0ef7da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,3 +38,7 @@ mcp-server/__pycache__/
 # Validation experiments
 validation-experiment/
 exp-2/
+
+# Internal planning
+IDEAS.md
+TODO.md
diff --git a/frontend/index.html b/frontend/index.html
index f57da2d..880bea6 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -5,12 +5,65 @@
     <link rel="icon" type="image/png" href="/favicon.png" />
     <link rel="apple-touch-icon" href="/favicon.png" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <meta name="description" content="Stop feeling lost in unfamiliar codebases. Semantic code search powered by AI." />
+    
+    <!-- Primary Meta Tags -->
+    <title>OpenCodeIntel – Understand Any Codebase</title>
+    <meta name="title" content="OpenCodeIntel – Understand Any Codebase" />
+    <meta name="description" content="Stop feeling lost in unfamiliar codebases. Semantic code search powered by AI. Index your repos and search by meaning, not just keywords." />
+    <meta name="keywords" content="code search, semantic search, AI code assistant, codebase understanding, developer tools, MCP, code intelligence" />
+    <meta name="author" content="OpenCodeIntel" />
     <meta name="theme-color" content="#0a0a0f" />
+    
+    <!-- Canonical URL -->
+    <link rel="canonical" href="https://opencodeintel.com/" />
+    
+    <!-- Open Graph / Facebook -->
+    <meta property="og:type" content="website" />
+    <meta property="og:url" content="https://opencodeintel.com/" />
+    <meta property="og:title" content="OpenCodeIntel – Understand Any Codebase" />
+    <meta property="og:description" content="Stop feeling lost in unfamiliar codebases. Semantic code search powered by AI. Index your repos and search by meaning, not just keywords." />
+    <meta property="og:image" content="https://opencodeintel.com/og-image.png" />
+    <meta property="og:image:width" content="1200" />
+    <meta property="og:image:height" content="630" />
+    <meta property="og:site_name" content="OpenCodeIntel" />
+    
+    <!-- Twitter -->
+    <meta name="twitter:card" content="summary_large_image" />
+    <meta name="twitter:url" content="https://opencodeintel.com/" />
+    <meta name="twitter:title" content="OpenCodeIntel – Understand Any Codebase" />
+    <meta name="twitter:description" content="Stop feeling lost in unfamiliar codebases. Semantic code search powered by AI. Index your repos and search by meaning, not just keywords." />
+    <meta name="twitter:image" content="https://opencodeintel.com/og-image.png" />
+    
+    <!-- Additional SEO -->
+    <meta name="robots" content="index, follow" />
+    <meta name="googlebot" content="index, follow" />
+    
+    <!-- Fonts -->
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap" rel="stylesheet">
-    <title>OpenCodeIntel – Understand Any Codebase</title>
+    
+    <!-- JSON-LD Structured Data -->
+    <script type="application/ld+json">
+    {
+      "@context": "https://schema.org",
+      "@type": "SoftwareApplication",
+      "name": "OpenCodeIntel",
+      "applicationCategory": "DeveloperApplication",
+      "operatingSystem": "Web",
+      "description": "Semantic code search powered by AI. Index your repos and search by meaning, not just keywords.",
+      "url": "https://opencodeintel.com/",
+      "offers": {
+        "@type": "Offer",
+        "price": "0",
+        "priceCurrency": "USD"
+      },
+      "author": {
+        "@type": "Organization",
+        "name": "OpenCodeIntel"
+      }
+    }
+    </script>
   </head>
   <body>
     <div id="root"></div>
diff --git a/frontend/public/og-image.png b/frontend/public/og-image.png
new file mode 100644
index 0000000..79fbe09
Binary files /dev/null and b/frontend/public/og-image.png differ
diff --git a/frontend/public/og-image.svg b/frontend/public/og-image.svg
new file mode 100644
index 0000000..31447f4
--- /dev/null
+++ b/frontend/public/og-image.svg
@@ -0,0 +1,61 @@
+<svg width="1200" height="630" xmlns="http://www.w3.org/2000/svg">
+  <defs>
+    <linearGradient id="bg" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#0a0a0f"/>
+      <stop offset="100%" style="stop-color:#1a1a2e"/>
+    </linearGradient>
+    <linearGradient id="accent" x1="0%" y1="0%" x2="100%" y2="0%">
+      <stop offset="0%" style="stop-color:#6366f1"/>
+      <stop offset="100%" style="stop-color:#8b5cf6"/>
+    </linearGradient>
+  </defs>
+  
+  <!-- Background -->
+  <rect width="1200" height="630" fill="url(#bg)"/>
+  
+  <!-- Grid pattern -->
+  <pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse">
+    <path d="M 40 0 L 0 0 0 40" fill="none" stroke="#ffffff08" stroke-width="1"/>
+  </pattern>
+  <rect width="1200" height="630" fill="url(#grid)"/>
+  
+  <!-- Accent line -->
+  <rect x="80" y="200" width="120" height="4" fill="url(#accent)" rx="2"/>
+  
+  <!-- Logo/Title -->
+  <text x="80" y="280" font-family="Inter, system-ui, sans-serif" font-size="64" font-weight="700" fill="#ffffff">
+    OpenCodeIntel
+  </text>
+  
+  <!-- Tagline -->
+  <text x="80" y="350" font-family="Inter, system-ui, sans-serif" font-size="32" font-weight="400" fill="#a1a1aa">
+    Understand Any Codebase
+  </text>
+  
+  <!-- Description -->
+  <text x="80" y="420" font-family="Inter, system-ui, sans-serif" font-size="24" font-weight="400" fill="#71717a">
+    Semantic code search powered by AI
+  </text>
+  
+  <!-- Code snippet decoration -->
+  <rect x="750" y="180" width="370" height="270" rx="12" fill="#16161e" stroke="#27272a" stroke-width="1"/>
+  <circle cx="775" cy="205" r="6" fill="#f87171"/>
+  <circle cx="795" cy="205" r="6" fill="#fbbf24"/>
+  <circle cx="815" cy="205" r="6" fill="#4ade80"/>
+  
+  <text x="775" y="250" font-family="JetBrains Mono, monospace" font-size="16" fill="#6366f1">const</text>
+  <text x="830" y="250" font-family="JetBrains Mono, monospace" font-size="16" fill="#ffffff">search</text>
+  <text x="905" y="250" font-family="JetBrains Mono, monospace" font-size="16" fill="#6366f1">=</text>
+  <text x="920" y="250" font-family="JetBrains Mono, monospace" font-size="16" fill="#fbbf24">"auth logic"</text>
+  
+  <text x="775" y="290" font-family="JetBrains Mono, monospace" font-size="16" fill="#71717a">// finds: login, oauth,</text>
+  <text x="775" y="320" font-family="JetBrains Mono, monospace" font-size="16" fill="#71717a">// jwt validation...</text>
+  
+  <text x="775" y="370" font-family="JetBrains Mono, monospace" font-size="16" fill="#4ade80">✓ 47 results</text>
+  <text x="775" y="400" font-family="JetBrains Mono, monospace" font-size="16" fill="#71717a">across 12 files</text>
+  
+  <!-- URL -->
+  <text x="80" y="560" font-family="Inter, system-ui, sans-serif" font-size="20" font-weight="500" fill="#6366f1">
+    opencodeintel.com
+  </text>
+</svg>
diff --git a/frontend/public/robots.txt b/frontend/public/robots.txt
new file mode 100644
index 0000000..5a114a1
--- /dev/null
+++ b/frontend/public/robots.txt
@@ -0,0 +1,15 @@
+# OpenCodeIntel - Robots.txt
+# https://opencodeintel.com
+
+User-agent: *
+Allow: /
+
+# Disallow authenticated/private routes
+Disallow: /dashboard
+Disallow: /github/callback
+Disallow: /login
+Disallow: /signup
+Disallow: /api/
+
+# Sitemap location
+Sitemap: https://opencodeintel.com/sitemap.xml
diff --git a/frontend/public/sitemap.xml b/frontend/public/sitemap.xml
new file mode 100644
index 0000000..dd5c364
--- /dev/null
+++ b/frontend/public/sitemap.xml
@@ -0,0 +1,93 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  <url>
+    <loc>https://opencodeintel.com/</loc>
+    <changefreq>weekly</changefreq>
+    <priority>1.0</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs</loc>
+    <changefreq>weekly</changefreq>
+    <priority>0.9</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/quickstart</loc>
+    <changefreq>weekly</changefreq>
+    <priority>0.9</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/mcp-setup</loc>
+    <changefreq>weekly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/mcp-tools</loc>
+    <changefreq>weekly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/mcp-examples</loc>
+    <changefreq>weekly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/features/search</loc>
+    <changefreq>monthly</changefreq>
+    <priority>0.7</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/features/dependencies</loc>
+    <changefreq>monthly</changefreq>
+    <priority>0.7</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/features/impact</loc>
+    <changefreq>monthly</changefreq>
+    <priority>0.7</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/features/style</loc>
+    <changefreq>monthly</changefreq>
+    <priority>0.7</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/deployment/docker</loc>
+    <changefreq>monthly</changefreq>
+    <priority>0.6</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/deployment/self-host</loc>
+    <changefreq>monthly</changefreq>
+    <priority>0.6</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/api</loc>
+    <changefreq>weekly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/api/repositories</loc>
+    <changefreq>monthly</changefreq>
+    <priority>0.7</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/api/search</loc>
+    <changefreq>monthly</changefreq>
+    <priority>0.7</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/api/analysis</loc>
+    <changefreq>monthly</changefreq>
+    <priority>0.7</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/architecture</loc>
+    <changefreq>monthly</changefreq>
+    <priority>0.6</priority>
+  </url>
+  <url>
+    <loc>https://opencodeintel.com/docs/contributing</loc>
+    <changefreq>monthly</changefreq>
+    <priority>0.6</priority>
+  </url>
+</urlset>
