Update README

README.md

@@ -4,3 +4,15 @@ _Very experimental and unofficial_
 
 Copilot-like ghost text code from [modeling-app](https://github.com/KittyCAD/modeling-app)
 by [Jess Frazelle](https://github.com/jessfraz) and based on [Cursor](https://cursor.sh/).
+
+## Documentation
+
+See the [demo source code](https://github.com/val-town/codemirror-codeium/tree/main/demo) for
+a reference to how it's used.
+
+```ts
+import { copilotPlugin } from "@val-town/codemirror-codeium";
+
+// This is a CodeMirror extension
+copilotPlugin();
+```

demo/index.html

@@ -14,7 +14,10 @@ <h1>
         >
       </h1>
       <p>by <a href="https://www.val.town/">val.town</a></p>
-      <p>⚠️ Hella experimental, very unofficial</p>
+      <p>
+        ⚠️ Hella experimental, very unofficial. Type in the box and it'll give
+        you AI autocompletions powered by Codeium.
+      </p>
 
       <h3>TypeScript environment in a web worker</h3>
       <div id="app">