diff --git a/plugin-designs/golden-path-check/golden-path-check.vue b/plugin-designs/golden-path-check/golden-path-check.vue
index 11f26f2d7..0ddfa32d4 100644
--- a/plugin-designs/golden-path-check/golden-path-check.vue
+++ b/plugin-designs/golden-path-check/golden-path-check.vue
@@ -1,4 +1,5 @@
 <script setup>
+import { bundleTreeRoot } from '@map/utils/embedBase.js'
 /**
  * golden-path-check.vue — the capability-1 single-element SELF-TEST of the golden path.
  *
@@ -45,10 +46,15 @@ const manifest = ref(null)
  *   <tree>/<bundle>/<profile>/index.html
  * so the manifest sits three levels up. A host embedding the element directly can override with
  * the `tree-base` ATTRIBUTE (<golden-path-check tree-base="https://host/doxa-maps">). Falls back
- * to deriving it from location.pathname so a plain drop still resolves.
+ * to the bundle's own script URL (bundleTreeRoot), then to location.pathname for the dev server.
  */
 const treeBase = computed(() => {
   if (props.treeBase) return props.treeBase.replace(/\/+$/, '')
+  // The bundle's OWN script URL first. Embedded on a host page (/embed-test, a partner site) the
+  // DOCUMENT is the host's, so the page path below points at the host and the manifest fetch misses,
+  // which rendered an empty checklist. bundleTreeRoot() reads <tree>/<bundle>/<bundle>.js.
+  const fromScript = bundleTreeRoot()
+  if (fromScript) return fromScript.replace(/\/+$/, '')
   if (typeof location === 'undefined') return '.'
   const parts = location.pathname.split('/').filter(Boolean)
   // drop index.html + <profile> + <bundle> when they are present