diff --git a/mateclaw-ui/src/views/Wiki/__tests__/failureOpen.test.ts b/mateclaw-ui/src/views/Wiki/__tests__/failureOpen.test.ts
new file mode 100644
index 00000000..5fc9a01d
--- /dev/null
+++ b/mateclaw-ui/src/views/Wiki/__tests__/failureOpen.test.ts
@@ -0,0 +1,44 @@
+import { describe, expect, it, vi } from 'vitest'
+import { openWikiFailureItem } from '../utils/failureOpen'
+
+describe('openWikiFailureItem', () => {
+  it('switches to the owning workspace before opening a cross-workspace KB', async () => {
+    const calls: string[] = []
+    const workspaceStore = {
+      currentWorkspaceId: 'ws-a',
+      switchWorkspace: vi.fn(async (id: string) => {
+        calls.push(`switch:${id}`)
+      }),
+    }
+    const wikiStore = {
+      selectKB: vi.fn(async (id: string, mode: 'browse' | 'manage') => {
+        calls.push(`select:${id}:${mode}`)
+      }),
+    }
+
+    await openWikiFailureItem(
+      { kbId: 'kb-2', workspaceId: 'ws-b' },
+      { workspaceStore, wikiStore },
+    )
+
+    expect(calls).toEqual(['switch:ws-b', 'select:kb-2:browse'])
+  })
+
+  it('opens directly when the failure item belongs to the active workspace', async () => {
+    const workspaceStore = {
+      currentWorkspaceId: 'ws-a',
+      switchWorkspace: vi.fn(),
+    }
+    const wikiStore = {
+      selectKB: vi.fn(async () => {}),
+    }
+
+    await openWikiFailureItem(
+      { kbId: 'kb-1', workspaceId: 'ws-a' },
+      { workspaceStore, wikiStore },
+    )
+
+    expect(workspaceStore.switchWorkspace).not.toHaveBeenCalled()
+    expect(wikiStore.selectKB).toHaveBeenCalledWith('kb-1', 'browse')
+  })
+})
diff --git a/mateclaw-ui/src/views/Wiki/components/WikiFailureCenter.vue b/mateclaw-ui/src/views/Wiki/components/WikiFailureCenter.vue
index a5dded70..35ac860a 100644
--- a/mateclaw-ui/src/views/Wiki/components/WikiFailureCenter.vue
+++ b/mateclaw-ui/src/views/Wiki/components/WikiFailureCenter.vue
@@ -16,7 +16,7 @@
     </button>
 
     <div v-show="!collapsed" class="fc-body">
-      <div v-for="it in items" :key="it.rawId" class="fc-row" @click="$emit('open', it.kbId)">
+      <div v-for="it in items" :key="it.rawId" class="fc-row" @click="$emit('open', it)">
         <span class="fc-badge" :class="rowKind(it)">{{ t(`wiki.status.${it.processingStatus}`) }}</span>
         <div class="fc-main">
           <div class="fc-line1">
@@ -25,7 +25,7 @@
           </div>
           <div class="fc-msg" :title="it.errorMessage || it.warningMessage || ''">{{ friendly(it) }}</div>
         </div>
-        <button class="fc-open" @click.stop="$emit('open', it.kbId)">{{ t('wiki.failureCenter.open') }}</button>
+        <button class="fc-open" @click.stop="$emit('open', it)">{{ t('wiki.failureCenter.open') }}</button>
       </div>
     </div>
   </section>
@@ -36,7 +36,7 @@ import { ref, onMounted } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { wikiApi, type WikiFailureItem } from '@/api/index'
 
-defineEmits<{ (e: 'open', kbId: string): void }>()
+defineEmits<{ (e: 'open', item: WikiFailureItem): void }>()
 
 const { t } = useI18n()
 const items = ref<WikiFailureItem[]>([])
diff --git a/mateclaw-ui/src/views/Wiki/index.vue b/mateclaw-ui/src/views/Wiki/index.vue
index 190258e0..4ee755e7 100644
--- a/mateclaw-ui/src/views/Wiki/index.vue
+++ b/mateclaw-ui/src/views/Wiki/index.vue
@@ -48,18 +48,21 @@ import { ref, reactive, watch, onMounted, computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useRoute, useRouter } from 'vue-router'
 import { useWikiStore, type WikiKB } from '@/stores/useWikiStore'
-import { wikiApi } from '@/api/index'
+import { useWorkspaceStore } from '@/stores/useWorkspaceStore'
+import { wikiApi, type WikiFailureItem } from '@/api/index'
 import { mcConfirm } from '@/components/common/useConfirm'
 import { mcToast } from '@/composables/useMcToast'
 import WikiLibrary from './components/WikiLibrary.vue'
 import WikiWorkspace from './components/WikiWorkspace.vue'
 import WikiFailureCenter from './components/WikiFailureCenter.vue'
+import { openWikiFailureItem } from './utils/failureOpen'
 
 const route = useRoute()
 const router = useRouter()
 
 const { t } = useI18n()
 const store = useWikiStore()
+const workspaceStore = useWorkspaceStore()
 
 // The cross-KB failure center spans every workspace, so it is admin-only —
 // mirrors the gate on the backing endpoint.
@@ -95,10 +98,8 @@ async function enterKB(id: number) {
   await store.selectKB(id, 'browse')
 }
 
-// The failure center emits a Snowflake kbId as a string — keep it a string end
-// to end (snowflake-precision-ok) and let the store cast satisfy its signature.
-async function openFromFailureCenter(kbId: string) {
-  await store.selectKB(kbId as unknown as number, 'browse')
+async function openFromFailureCenter(item: WikiFailureItem) {
+  await openWikiFailureItem(item, { workspaceStore, wikiStore: store })
 }
 
 async function enterKBManage(id: number) {
diff --git a/mateclaw-ui/src/views/Wiki/utils/failureOpen.ts b/mateclaw-ui/src/views/Wiki/utils/failureOpen.ts
new file mode 100644
index 00000000..dee0a9f8
--- /dev/null
+++ b/mateclaw-ui/src/views/Wiki/utils/failureOpen.ts
@@ -0,0 +1,27 @@
+export interface WikiFailureOpenItem {
+  kbId: string
+  workspaceId?: string | null
+}
+
+export interface WikiFailureOpenDeps {
+  workspaceStore: {
+    currentWorkspaceId: string | null
+    switchWorkspace: (id: string) => Promise<void> | void
+  }
+  wikiStore: {
+    // The wiki store is still typed as number in places, but Snowflake KB IDs
+    // are passed as strings at runtime to avoid precision loss.
+    selectKB: (id: any, mode: 'browse' | 'manage') => Promise<void> | void
+  }
+}
+
+export async function openWikiFailureItem(
+  item: WikiFailureOpenItem,
+  deps: WikiFailureOpenDeps,
+) {
+  const targetWorkspaceId = item.workspaceId || null
+  if (targetWorkspaceId && deps.workspaceStore.currentWorkspaceId !== targetWorkspaceId) {
+    await deps.workspaceStore.switchWorkspace(targetWorkspaceId)
+  }
+  await deps.wikiStore.selectKB(item.kbId, 'browse')
+}