diff --git a/lib/antora-link-checker-extension.js b/lib/antora-link-checker-extension.js
index 185f6433..a5aecf9f 100644
--- a/lib/antora-link-checker-extension.js
+++ b/lib/antora-link-checker-extension.js
@@ -1,3 +1,6 @@
+// This extension stops the Antora site generator from building the site after checking internal links (xrefs).
+// As a result, the output is a list of broken links rather than a documentation site.
+
 module.exports.register = (context) => {
 	context.on('documentsConverted', () => {
 		context.stop()