diff --git a/dreamcode.md b/dreamcode.md
index 352b848..66a623e 100644
--- a/dreamcode.md
+++ b/dreamcode.md
@@ -66,6 +66,19 @@ copilotExtension.on(
   }
 );
 
+copilotExtension.registerFunction({
+  name: "sayHi",
+  parameters: {
+    name: {
+      type: "string",
+      description: "The name of the person to say hi to",
+    },
+  },
+  async run({ name }, { octokit, log }) {
+    return `Hello, ${name}!`;
+  },
+});
+
 createServer(createNodeMiddleware(copilotExtension)).listen(3000);
 copilotExtension.log.info("Listening on http://localhost:3000");
 ```