diff --git a/site/index.html b/site/index.html
index 3435a16..ae25cdc 100644
--- a/site/index.html
+++ b/site/index.html
@@ -4,6 +4,18 @@
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>PayFlow · a human does not read every line</title>
+<meta name="description" content="An AI agent built this payment system from a frozen spec, guarded by a four layer verification pyramid. 73.1% mutation kill rate, zero hand written test cases.">
+<meta property="og:type" content="website">
+<meta property="og:url" content="https://mariusargatu.github.io/PayFlow/">
+<meta property="og:title" content="PayFlow: a human does not read every line">
+<meta property="og:description" content="An AI agent built this payment system from a frozen spec. Four automatic checks make it safe to ship: 73.1% mutation kill rate, zero hand written test cases.">
+<meta property="og:image" content="https://mariusargatu.github.io/PayFlow/og.png">
+<meta property="og:image:width" content="1280">
+<meta property="og:image:height" content="640">
+<meta name="twitter:card" content="summary_large_image">
+<meta name="twitter:title" content="PayFlow: a human does not read every line">
+<meta name="twitter:description" content="An AI agent built this payment system from a frozen spec, guarded by a four layer verification pyramid. 73.1% mutation kill rate, zero hand written test cases.">
+<meta name="twitter:image" content="https://mariusargatu.github.io/PayFlow/og.png">
 <style>
   :root{
     --bg:#0A0E14; --surface:#10151D; --surface-2:#141A24; --terminal:#0C0F14;
diff --git a/site/og.png b/site/og.png
new file mode 100644
index 0000000..1ad8360
Binary files /dev/null and b/site/og.png differ