diff --git a/layers/registry/app/components/SkillDetail.vue b/layers/registry/app/components/SkillDetail.vue
index 88b29434..0c33c78a 100644
--- a/layers/registry/app/components/SkillDetail.vue
+++ b/layers/registry/app/components/SkillDetail.vue
@@ -2335,7 +2335,7 @@ useHead(computed(() => ({
           >
             <SkillBehaviors
               v-if="data.raw || behaviors.length"
-              :behaviors="data.sourceFacts.behaviors"
+              :behaviors="data.sourceFacts.behaviors ?? null"
               :readings="behaviorReadings"
             />
             <SkillThirdPartyChecks
diff --git a/test/unit/skill-detail-duplicate-canonical-path.nuxt.test.ts b/test/unit/skill-detail-duplicate-canonical-path.nuxt.test.ts
index 1c9530e9..579c17c0 100644
--- a/test/unit/skill-detail-duplicate-canonical-path.nuxt.test.ts
+++ b/test/unit/skill-detail-duplicate-canonical-path.nuxt.test.ts
@@ -1,6 +1,7 @@
 import { mockNuxtImport, mountSuspended } from '@nuxt/test-utils/runtime'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { reactive, ref } from 'vue'
+import SkillBehaviors from '../../layers/registry/app/components/_SkillBehaviors.vue'
 
 const route = reactive({
   path: '/gh/mirror/multi/shared-skill',
@@ -216,4 +217,16 @@ describe('skillDetail duplicate-group canonical URL', () => {
 
     wrapper.unmount()
   })
+
+  it('passes null behaviors when a raw snapshot lacks them', async () => {
+    const wrapper = await mountSuspended(
+      await import('../../layers/registry/app/components/SkillDetail.vue').then(module => module.default),
+      { props: { owner: 'mirror', repo: 'multi', name: 'shared-skill' } },
+    )
+
+    const panel = wrapper.findComponent(SkillBehaviors)
+    expect(panel.exists()).toBe(true)
+    expect(panel.props('behaviors')).toBe(null)
+    wrapper.unmount()
+  })
 })