diff --git a/PROJECT_STATUS.md b/PROJECT_STATUS.md
index 1a673a3..0fbd7e6 100644
--- a/PROJECT_STATUS.md
+++ b/PROJECT_STATUS.md
@@ -18,6 +18,9 @@ maintenance-first support.
 
 ## Timeline
 
+- **2026-07-31:** Added locally verified Open Graph/Twitter image metadata and
+  SoftwareApplication structured data to the public landing layout; production
+  deployment remains separate.
 - **2026-07-29:** Added an owned `/changelog` with verified release outcomes and
   direct GitHub Roadmap and Source links.
 - **2026-07-13:** Shipped authenticated RSS/Atom reading and OPML import.
diff --git a/landing-astro/src/layouts/Layout.astro b/landing-astro/src/layouts/Layout.astro
index f5d30f2..487c205 100644
--- a/landing-astro/src/layouts/Layout.astro
+++ b/landing-astro/src/layouts/Layout.astro
@@ -32,10 +32,25 @@ const SITE_URL = 'https://read.significanthobbies.com';
     <meta property="og:site_name" content="Library Reader" />
     <meta property="og:title" content={title} />
     <meta property="og:description" content={description} />
+    <meta property="og:image" content={`${SITE_URL}/icon.svg`} />
 
     <meta name="twitter:card" content="summary_large_image" />
     <meta name="twitter:title" content={title} />
     <meta name="twitter:description" content={description} />
+    <meta name="twitter:image" content={`${SITE_URL}/icon.svg`} />
+    <script
+      is:inline
+      type="application/ld+json"
+      set:html={JSON.stringify({
+        '@context': 'https://schema.org',
+        '@type': 'SoftwareApplication',
+        name: 'Library Reader',
+        url: SITE_URL,
+        description,
+        applicationCategory: 'ProductivityApplication',
+        operatingSystem: 'Web',
+      })}
+    />
   </head>
   <body class="antialiased">
     <slot />
diff --git a/public/api-ai.json b/public/api-ai.json
index 5db0f0d..ebbdbdb 100644
--- a/public/api-ai.json
+++ b/public/api-ai.json
@@ -21,7 +21,7 @@
     {
       "id": "login",
       "url": "https://read.significanthobbies.com/login",
-      "md": null,
+      "md": "https://read.significanthobbies.com/login.md",
       "kind": "static",
       "description": "Sign in"
     }
diff --git a/public/login.md b/public/login.md
new file mode 100644
index 0000000..a84bd39
--- /dev/null
+++ b/public/login.md
@@ -0,0 +1,11 @@
+# Sign in to Reader
+
+Reader uses Google sign-in to open a private research library.
+
+## Privacy boundary
+
+- Saved articles, PDFs, highlights, notes, lists, boards, and AI conversations are private.
+- This public page explains the sign-in boundary; it does not expose account data.
+- Personal library routes are intentionally excluded from the public sitemap and agent catalog.
+
+Sign in: https://read.significanthobbies.com/login
diff --git a/public/sitemap.xml b/public/sitemap.xml
index 5a022e9..89838c7 100644
--- a/public/sitemap.xml
+++ b/public/sitemap.xml
@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url><loc>https://read.significanthobbies.com/</loc></url>
-  <url><loc>https://read.significanthobbies.com/api/ai</loc></url>
   <url><loc>https://read.significanthobbies.com/index.md</loc></url>
   <url><loc>https://read.significanthobbies.com/llms.txt</loc></url>
   <url><loc>https://read.significanthobbies.com/login</loc></url>
diff --git a/src/agent-edge.mjs b/src/agent-edge.mjs
index fcb20de..44b08b7 100644
--- a/src/agent-edge.mjs
+++ b/src/agent-edge.mjs
@@ -39,7 +39,7 @@ export const AGENT_SURFACE = {
       {
         "id": "login",
         "url": "https://read.significanthobbies.com/login",
-        "md": null,
+        "md": "https://read.significanthobbies.com/login.md",
         "kind": "static",
         "description": "Sign in"
       }
