diff --git a/packages/cli/src/components/sequoia-comments.js b/packages/cli/src/components/sequoia-comments.js
index 7639bed..3b6ea0a 100644
--- a/packages/cli/src/components/sequoia-comments.js
+++ b/packages/cli/src/components/sequoia-comments.js
@@ -11,6 +11,14 @@
* 1. The `document-uri` attribute on the element
* 2. A tag in the document head
*
+ * Custom reply button:
+ * Place any element with slot="reply-button" to replace the default Bluesky/Blacksky buttons.
+ * It stays in the light DOM, so your page CSS applies to it normally.
+ * Only practical with post-uri, since that's the only time the URL is known at authoring time:
+ *
Comments
-