diff --git a/apps/repl/app/templates/edit/header.gts b/apps/repl/app/templates/edit/header.gts
index 10bc393fc..35faf6be4 100644
--- a/apps/repl/app/templates/edit/header.gts
+++ b/apps/repl/app/templates/edit/header.gts
@@ -26,6 +26,7 @@ import { Share } from './share.gts';
           <FaIcon @icon={{faEmber}} @size="3x" class="-mb-3 -mt-2" />
           <span class="sr-only">Ember.JS homepage</span>
         </a>
+        <span class="sr-only">Limber, a playground and REPL</span>
       </h1>
 
       {{#if (notInIframe)}}
diff --git a/apps/repl/app/templates/edit/share.gts b/apps/repl/app/templates/edit/share.gts
index d5d9d22d9..b29fe42be 100644
--- a/apps/repl/app/templates/edit/share.gts
+++ b/apps/repl/app/templates/edit/share.gts
@@ -23,7 +23,13 @@ const isShowing = tracked(false);
 
 export const Share = <template>
   <Modal as |m|>
-    <button data-share-button type="button" {{on "click" m.open}} {{m.focusOnClose}}>
+    <button
+      data-share-button
+      type="button"
+      aria-label="Share"
+      {{on "click" m.open}}
+      {{m.focusOnClose}}
+    >
       <span class="sm:inline-flex hidden">Share</span>
       <FaIcon @icon={{faShareFromSquare}} />
     </button>
diff --git a/apps/repl/public/llms.txt b/apps/repl/public/llms.txt
new file mode 100644
index 000000000..65c8629bb
--- /dev/null
+++ b/apps/repl/public/llms.txt
@@ -0,0 +1,23 @@
+# Limber
+
+> Limber is a playground and REPL that runs in the browser. It compiles and renders Ember (gjs, gts, hbs), Svelte, Vue, React (jsx), Mermaid, and markdown with live code fences. The document lives in the URL, so a link shares the whole program.
+
+The app has no server side. All compilation happens in the browser of the visitor.
+
+## Use
+
+- [Editor](https://limber.glimdown.com/edit): the playground. The `format` query parameter selects the language, and `t` (plain text) or `c` (compressed text) holds the document.
+- [Output only](https://limber.glimdown.com/output): renders a document with no editor, for an iframe.
+
+## Docs
+
+- [Overview](https://limber.glimdown.com/docs)
+- [Editor options](https://limber.glimdown.com/docs/editor): query parameters that control the editor
+- [Embedding](https://limber.glimdown.com/docs/embedding): how to embed the playground in an iframe
+- [ember-repl](https://limber.glimdown.com/docs/ember-repl): the Ember library that compiles and renders documents
+- [repl-sdk](https://limber.glimdown.com/docs/repl-sdk): the framework-agnostic compiler library
+- [Related projects](https://limber.glimdown.com/docs/related)
+
+## Source
+
+- [GitHub repository](https://github.com/NullVoxPopuli/limber)