diff --git a/public/robots.txt b/public/robots.txt
index a859c94..367b518 100644
--- a/public/robots.txt
+++ b/public/robots.txt
@@ -7,6 +7,10 @@ Allow: /
 # Sitemap location
 Sitemap: https://gemmology.dev/sitemap-index.xml
 
+# LLM crawler index (https://llmstxt.org/)
+LLM-Content: https://gemmology.dev/llms.txt
+Sitemap: https://gemmology.dev/llms.txt
+
 # Disallow API endpoints (served by separate worker)
 Disallow: /api/
 
diff --git a/src/layouts/BaseLayout.astro b/src/layouts/BaseLayout.astro
index 8bde178..c86ad2c 100644
--- a/src/layouts/BaseLayout.astro
+++ b/src/layouts/BaseLayout.astro
@@ -49,6 +49,9 @@ const fullTitle = isHome
     <!-- Canonical URL -->
     <link rel="canonical" href={canonicalURL} />
 
+    <!-- LLM crawler index (https://llmstxt.org/) -->
+    <link rel="alternate" type="text/plain" title="LLM index" href="/llms.txt" />
+
     <!-- Favicon -->
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <link rel="apple-touch-icon" href="/apple-touch-icon.png" />