diff --git a/apps/app/src/components-v2/layout/AppSidebar.stories.ts b/apps/app/src/components-v2/layout/AppSidebar.stories.ts
index c5ffe438..1800e2e1 100644
--- a/apps/app/src/components-v2/layout/AppSidebar.stories.ts
+++ b/apps/app/src/components-v2/layout/AppSidebar.stories.ts
@@ -1,5 +1,5 @@
 import type { Meta, StoryObj } from '@storybook/vue3-vite'
-import { navFixture, orgA, userFixture, withPinia } from '@/stories/v2/_helpers'
+import { orgA, userFixture, withPinia } from '@/stories/v2/_helpers'
 import AppSidebar from '@/components-v2/layout/AppSidebar.vue'
 import { useAuthStore } from '@/stores/useAuthStore'
 import { useShellUiStore } from '@/stores/useShellUiStore'
@@ -10,6 +10,9 @@ import { useShellUiStore } from '@/stores/useShellUiStore'
  * via WorkspaceSwitcher, useAuthStore. Each story seeds both stores on a
  * fresh Pinia. The desktop <aside> is `hidden lg:flex`, so view at a
  * viewport ≥ 1024px to see the permanent column.
+ *
+ * Plan 2.5 P4 (AD-2.5-B1): SidebarNav reads APP_NAVIGATION directly; no
+ * `groups` prop is threaded through AppSidebar.
  */
 const meta: Meta<typeof AppSidebar> = {
   title: 'v2 Shell/AppSidebar',
@@ -21,7 +24,6 @@ export default meta
 type Story = StoryObj<typeof AppSidebar>
 
 export const Expanded: Story = {
-  args: { groups: navFixture },
   decorators: [
     withPinia(() => {
       const auth = useAuthStore()
@@ -34,21 +36,17 @@ export const Expanded: Story = {
       shellUi.sidebarCollapsed = false
     }),
   ],
-  render: args => ({
+  render: () => ({
     components: { AppSidebar },
-    setup() {
-      return { args }
-    },
     template: `
       <div class="flex h-[600px]">
-        <AppSidebar :groups="args.groups" />
+        <AppSidebar />
       </div>
     `,
   }),
 }
 
 export const Collapsed: Story = {
-  args: { groups: navFixture },
   decorators: [
     withPinia(() => {
       const auth = useAuthStore()
@@ -61,14 +59,11 @@ export const Collapsed: Story = {
       shellUi.sidebarCollapsed = true
     }),
   ],
-  render: args => ({
+  render: () => ({
     components: { AppSidebar },
-    setup() {
-      return { args }
-    },
     template: `
       <div class="flex h-[600px]">
-        <AppSidebar :groups="args.groups" />
+        <AppSidebar />
       </div>
     `,
   }),
diff --git a/apps/app/src/components-v2/layout/AppSidebar.vue b/apps/app/src/components-v2/layout/AppSidebar.vue
index 171f3837..355a2c92 100644
--- a/apps/app/src/components-v2/layout/AppSidebar.vue
+++ b/apps/app/src/components-v2/layout/AppSidebar.vue
@@ -19,8 +19,11 @@
  *     teleported overlay. By unmounting on desktop we guarantee no modal backdrop /
  *     focus-trapped dialog can appear on wide viewports regardless of mobileOpen state.
  *
- * nav groups arrive as a prop — this file must NOT import @/navigation directly
- * (components-v2 import boundary; the layout page supplies nav data).
+ * Nav data: as of Plan 2.5 P4, SidebarNav reads APP_NAVIGATION from
+ * @/config/navigation directly — no prop is threaded through AppSidebar.
+ * The components-v2 import boundary still applies to @/navigation (the v1
+ * source), but @/config/navigation is the unclassified central registry
+ * and is consumed in-place by SidebarNav.
  *
  * Deliberate simplification: crewli-starter's bespoke Teleport tooltip (shown in
  * collapsed mode for nav items) is NOT ported here. SidebarNav already provides
@@ -41,19 +44,10 @@ import { computed } from 'vue'
 import { breakpointsTailwind, useBreakpoints } from '@vueuse/core'
 import Drawer from 'primevue/drawer'
 import { useShellUiStore } from '@/stores/useShellUiStore'
-import type { V2NavGroup } from '@/types/v2/nav'
 import SidebarHeader from '@/components-v2/layout/SidebarHeader.vue'
 import SidebarNav from '@/components-v2/layout/SidebarNav.vue'
 import WorkspaceSwitcher from '@/components-v2/layout/WorkspaceSwitcher.vue'
 
-defineProps<{
-  /**
-   * Nav groups passed in from the layout — components-v2 files may NOT
-   * import from @/navigation; the parent layout supplies this.
-   */
-  groups: V2NavGroup[]
-}>()
-
 const shell = useShellUiStore()
 
 // Shared breakpoint signal — must match SidebarHeader and the CSS `lg:` boundary (1024px).
@@ -84,10 +78,7 @@ const mobileVisible = computed<boolean>({
     :class="shell.sidebarCollapsed ? 'w-16' : 'w-64'"
   >
     <SidebarHeader />
-    <SidebarNav
-      :groups="groups"
-      :collapsed="shell.sidebarCollapsed"
-    />
+    <SidebarNav :collapsed="shell.sidebarCollapsed" />
     <WorkspaceSwitcher :collapsed="shell.sidebarCollapsed" />
   </aside>
 
@@ -119,10 +110,7 @@ const mobileVisible = computed<boolean>({
     }"
   >
     <SidebarHeader />
-    <SidebarNav
-      :groups="groups"
-      :collapsed="false"
-    />
+    <SidebarNav :collapsed="false" />
     <WorkspaceSwitcher :collapsed="false" />
   </Drawer>
 </template>
diff --git a/apps/app/src/components-v2/layout/SidebarNav.stories.ts b/apps/app/src/components-v2/layout/SidebarNav.stories.ts
index c44d619f..9b00074c 100644
--- a/apps/app/src/components-v2/layout/SidebarNav.stories.ts
+++ b/apps/app/src/components-v2/layout/SidebarNav.stories.ts
@@ -1,13 +1,13 @@
 import type { Meta, StoryObj } from '@storybook/vue3-vite'
 import { useRouter } from 'vue-router'
-import { navFixture } from '@/stories/v2/_helpers'
 import SidebarNav from '@/components-v2/layout/SidebarNav.vue'
 
 /**
- * SidebarNav needs no Pinia, but vue-router is installed app-wide in
- * preview.ts (the component uses useRoute + RouterLink). The
- * WithActiveItem story pushes the `events` route in setup so the
- * Evenementen item renders in its active state.
+ * SidebarNav now reads APP_NAVIGATION from `@/config/navigation` directly
+ * (AD-2.5-B1 / Plan 2.5 P4). The previous `groups` prop is gone — stories
+ * only vary the `collapsed` axis and the active route. vue-router is
+ * installed app-wide in preview.ts; the WithActiveItem story pushes the
+ * `v2-dashboard` route so the Dashboard item renders in its active state.
  */
 const meta: Meta<typeof SidebarNav> = {
   title: 'v2 Shell/SidebarNav',
@@ -22,7 +22,7 @@ export default meta
 type Story = StoryObj<typeof SidebarNav>
 
 export const Expanded: Story = {
-  args: { groups: navFixture, collapsed: false },
+  args: { collapsed: false },
   render: args => ({
     components: { SidebarNav },
     setup() {
@@ -30,14 +30,14 @@ export const Expanded: Story = {
     },
     template: `
       <div class="w-64 bg-[var(--p-content-background)]">
-        <SidebarNav :groups="args.groups" :collapsed="args.collapsed" />
+        <SidebarNav :collapsed="args.collapsed" />
       </div>
     `,
   }),
 }
 
 export const Collapsed: Story = {
-  args: { groups: navFixture, collapsed: true },
+  args: { collapsed: true },
   render: args => ({
     components: { SidebarNav },
     setup() {
@@ -45,26 +45,26 @@ export const Collapsed: Story = {
     },
     template: `
       <div class="w-16 bg-[var(--p-content-background)]">
-        <SidebarNav :groups="args.groups" :collapsed="args.collapsed" />
+        <SidebarNav :collapsed="args.collapsed" />
       </div>
     `,
   }),
 }
 
 export const WithActiveItem: Story = {
-  args: { groups: navFixture, collapsed: false },
+  args: { collapsed: false },
   render: args => ({
     components: { SidebarNav },
     setup() {
       const router = useRouter()
 
-      router.push({ name: 'events' })
+      router.push({ name: 'v2-dashboard' })
 
       return { args }
     },
     template: `
       <div class="w-64 bg-[var(--p-content-background)]">
-        <SidebarNav :groups="args.groups" :collapsed="args.collapsed" />
+        <SidebarNav :collapsed="args.collapsed" />
       </div>
     `,
   }),
diff --git a/apps/app/src/components-v2/layout/SidebarNav.vue b/apps/app/src/components-v2/layout/SidebarNav.vue
index 7fac0a39..36365f3c 100644
--- a/apps/app/src/components-v2/layout/SidebarNav.vue
+++ b/apps/app/src/components-v2/layout/SidebarNav.vue
@@ -1,71 +1,145 @@
 <script setup lang="ts">
+/**
+ * SidebarNav — registry-driven sidebar (AD-2.5-B1 / Plan 2.5 P4).
+ *
+ * Reads `APP_NAVIGATION` directly from `@/config/navigation`. This is the
+ * single source of truth for sidebar items and breadcrumb derivation
+ * (the breadcrumb side is served by `useNavBreadcrumb` over the same
+ * registry). Prior to P4, this component received a `groups` prop the
+ * parent layout built from `@/navigation/vertical`; the prop chain
+ * (OrganizerLayoutV2 → AppSidebar → SidebarNav) is removed.
+ *
+ * Render contract:
+ *   - Top-level leaf nodes (routeName set, no children) render as a row.
+ *   - Top-level branch nodes (children set) render their label as a
+ *     section heading followed by their children as rows.
+ *   - Nodes without a `routeName` render as a non-clickable row
+ *     (label-only) — dormant placeholders until their v2 page lands.
+ */
+
 import { useRoute } from 'vue-router'
 import type { RouteLocationRaw } from 'unplugin-vue-router'
 import Icon from '@/components/Icon.vue'
-import { isNavItemActive } from '@/components-v2/layout/sidebarNavActive'
-import type { V2NavGroup, V2NavItem } from '@/types/v2/nav'
+import { APP_NAVIGATION, type NavItem } from '@/config/navigation'
 
 defineProps<{
-  groups: V2NavGroup[]
   collapsed: boolean
 }>()
 
 const route = useRoute()
 
-function checkActive(item: V2NavItem): boolean {
-  return isNavItemActive(item, route.name)
+function isActive(item: NavItem): boolean {
+  if (!item.routeName)
+    return false
+
+  const current = route.name
+
+  if (typeof current !== 'string')
+    return false
+
+  return current === item.routeName
+    || current.startsWith(`${item.routeName}-`)
 }
 
-// Cast V2NavItem.to (vue-router generic RouteLocationRaw) to the typed version
-// expected by RouterLinkTyped. V2NavItem.to values are always named-route objects
-// from the RouteNamedMap so the cast is sound.
-function itemTo(item: V2NavItem): RouteLocationRaw {
-  return item.to as RouteLocationRaw
+// NavItem.routeName values come from APP_NAVIGATION and are always valid
+// named routes from the RouteNamedMap when present — the cast to the typed
+// RouterLink RouteLocationRaw is sound. Items without routeName render via
+// the non-clickable branch (see template) so this function is never called
+// for them.
+function itemTo(item: NavItem): RouteLocationRaw {
+  return { name: item.routeName } as RouteLocationRaw
 }
 </script>
 
 <template>
-  <!--
-    .nav        → flex-1 min-h-0 overflow-y-auto py-3.5 px-2.5 [scrollbar-width:thin]
-    .nav-group  → mt-[18px] (only from the second group onward, via CSS sibling selector →
-    Tailwind cannot express `+ .nav-group { margin-top }` on a class without
-    a group-based trick; using first:mt-0 / not-first:mt-[18px] via the
-    :not(:first-child) pseudo equivalent — `[&:not(:first-child)]:mt-[18px]`)
-    .nav-label  → text-[11px] font-semibold text-surface-500 dark:text-surface-400
-    uppercase tracking-[0.06em] px-2.5 pb-1.5 whitespace-nowrap overflow-hidden
-    .nav-item   → flex items-center gap-3 py-[9px] px-2.5 rounded-md
-    text-surface-600 dark:text-surface-300 text-[13.5px] font-medium
-    transition-[background,color] duration-150 whitespace-nowrap relative
-    cursor-pointer w-full text-start min-w-0
-    .nav-item:hover       → hover:bg-surface-100 dark:hover:bg-surface-800 hover:text-surface-900 dark:hover:text-surface-0
-    .nav-item.active      → bg-primary-50 dark:bg-primary-950 text-primary-600 dark:text-primary-400 font-semibold
-    .nav-item.active::before → the left accent bar — inexpressible in Tailwind without a plugin
-    (position:absolute left:-10px, custom width:3px, height:18px,
-    background:primary, transform:translateY(-50%)). Using <style scoped>.
-    .nav-item .iconify    → text-[18px] flex-shrink-0  (handled by Icon's own sizing via :size)
-    .count      → ms-auto text-[11px] font-semibold bg-surface-100 dark:bg-surface-800
-    text-surface-500 dark:text-surface-400 px-1.5 py-px rounded-full
-    .nav-item.active .count → bg-primary-600 dark:bg-primary-500 text-white
-  -->
   <nav class="flex-1 min-h-0 overflow-y-auto py-3.5 px-2.5 [scrollbar-width:thin]">
-    <div
-      v-for="(group, gi) in groups"
-      :key="gi"
-      class="[&:not(:first-child)]:mt-[18px]"
+    <template
+      v-for="topItem in APP_NAVIGATION"
+      :key="topItem.key"
     >
-      <!-- Group label: hidden in collapsed mode -->
+      <!-- Branch node: section label + children -->
       <div
-        v-if="group.label && !collapsed"
-        class="text-[11px] font-semibold text-surface-500 dark:text-surface-400 uppercase tracking-[0.06em] px-2.5 pb-1.5 whitespace-nowrap overflow-hidden"
+        v-if="topItem.children"
+        class="[&:not(:first-child)]:mt-[18px]"
       >
-        {{ group.label }}
+        <div
+          v-if="!collapsed"
+          class="text-[11px] font-semibold text-surface-500 dark:text-surface-400 uppercase tracking-[0.06em] px-2.5 pb-1.5 whitespace-nowrap overflow-hidden"
+        >
+          {{ topItem.label }}
+        </div>
+
+        <template
+          v-for="child in topItem.children"
+          :key="child.key"
+        >
+          <!-- Leaf with route -->
+          <RouterLink
+            v-if="child.routeName"
+            v-slot="{ href, navigate }"
+            :to="itemTo(child)"
+            custom
+          >
+            <a
+              :href="href"
+              class="flex items-center gap-3 py-[9px] rounded-md text-[13.5px] font-medium transition-[background,color] duration-150 whitespace-nowrap relative cursor-pointer w-full text-start min-w-0"
+              :class="[
+                collapsed ? 'justify-center px-0' : 'px-2.5',
+                isActive(child)
+                  ? 'nav-item-active bg-primary-50 dark:bg-primary-950 text-primary-600 dark:text-primary-400 font-semibold'
+                  : 'text-surface-600 dark:text-surface-300 hover:bg-surface-100 dark:hover:bg-surface-800 hover:text-surface-900 dark:hover:text-surface-0',
+              ]"
+              :aria-current="isActive(child) ? 'page' : undefined"
+              :aria-label="child.label"
+              :title="collapsed ? child.label : undefined"
+              @click="navigate"
+            >
+              <Icon
+                v-if="child.icon"
+                :name="child.icon"
+                :size="18"
+                class="flex-shrink-0"
+              />
+
+              <span
+                v-if="!collapsed"
+                class="overflow-hidden text-ellipsis min-w-0"
+              >
+                {{ child.label }}
+              </span>
+            </a>
+          </RouterLink>
+
+          <!-- Leaf without route: dormant placeholder -->
+          <div
+            v-else
+            class="flex items-center gap-3 py-[9px] rounded-md text-[13.5px] font-medium whitespace-nowrap relative w-full text-start min-w-0 text-surface-400 dark:text-surface-500 cursor-not-allowed"
+            :class="collapsed ? 'justify-center px-0' : 'px-2.5'"
+            :aria-disabled="true"
+            :title="collapsed ? child.label : undefined"
+          >
+            <Icon
+              v-if="child.icon"
+              :name="child.icon"
+              :size="18"
+              class="flex-shrink-0"
+            />
+
+            <span
+              v-if="!collapsed"
+              class="overflow-hidden text-ellipsis min-w-0"
+            >
+              {{ child.label }}
+            </span>
+          </div>
+        </template>
       </div>
 
+      <!-- Top-level leaf with route -->
       <RouterLink
-        v-for="item in group.items"
-        :key="item.id"
+        v-else-if="topItem.routeName"
         v-slot="{ href, navigate }"
-        :to="itemTo(item)"
+        :to="itemTo(topItem)"
         custom
       >
         <a
@@ -73,44 +147,54 @@ function itemTo(item: V2NavItem): RouteLocationRaw {
           class="flex items-center gap-3 py-[9px] rounded-md text-[13.5px] font-medium transition-[background,color] duration-150 whitespace-nowrap relative cursor-pointer w-full text-start min-w-0"
           :class="[
             collapsed ? 'justify-center px-0' : 'px-2.5',
-            checkActive(item)
+            isActive(topItem)
               ? 'nav-item-active bg-primary-50 dark:bg-primary-950 text-primary-600 dark:text-primary-400 font-semibold'
               : 'text-surface-600 dark:text-surface-300 hover:bg-surface-100 dark:hover:bg-surface-800 hover:text-surface-900 dark:hover:text-surface-0',
           ]"
-          :aria-current="checkActive(item) ? 'page' : undefined"
-          :aria-label="item.label"
-          :title="collapsed ? item.label : undefined"
+          :aria-current="isActive(topItem) ? 'page' : undefined"
+          :aria-label="topItem.label"
+          :title="collapsed ? topItem.label : undefined"
           @click="navigate"
         >
           <Icon
-            :name="item.icon"
+            v-if="topItem.icon"
+            :name="topItem.icon"
             :size="18"
             class="flex-shrink-0"
           />
 
-          <!-- Text label: hidden in collapsed mode -->
           <span
             v-if="!collapsed"
             class="overflow-hidden text-ellipsis min-w-0"
           >
-            {{ item.label }}
-          </span>
-
-          <!-- Count badge: hidden in collapsed mode -->
-          <span
-            v-if="item.count != null && !collapsed"
-            class="ms-auto text-[11px] font-semibold px-1.5 py-px rounded-full"
-            :class="[
-              checkActive(item)
-                ? 'bg-primary-600 dark:bg-primary-500 text-white'
-                : 'bg-surface-100 dark:bg-surface-800 text-surface-500 dark:text-surface-400',
-            ]"
-          >
-            {{ item.count }}
+            {{ topItem.label }}
           </span>
         </a>
       </RouterLink>
-    </div>
+
+      <!-- Top-level leaf without route: dormant placeholder -->
+      <div
+        v-else
+        class="flex items-center gap-3 py-[9px] rounded-md text-[13.5px] font-medium whitespace-nowrap relative w-full text-start min-w-0 text-surface-400 dark:text-surface-500 cursor-not-allowed"
+        :class="collapsed ? 'justify-center px-0' : 'px-2.5'"
+        :aria-disabled="true"
+        :title="collapsed ? topItem.label : undefined"
+      >
+        <Icon
+          v-if="topItem.icon"
+          :name="topItem.icon"
+          :size="18"
+          class="flex-shrink-0"
+        />
+
+        <span
+          v-if="!collapsed"
+          class="overflow-hidden text-ellipsis min-w-0"
+        >
+          {{ topItem.label }}
+        </span>
+      </div>
+    </template>
   </nav>
 </template>
 
diff --git a/apps/app/src/components-v2/layout/WorkspaceSwitcher.vue b/apps/app/src/components-v2/layout/WorkspaceSwitcher.vue
index c69cefd3..ea4bdd57 100644
--- a/apps/app/src/components-v2/layout/WorkspaceSwitcher.vue
+++ b/apps/app/src/components-v2/layout/WorkspaceSwitcher.vue
@@ -23,7 +23,7 @@ import type { Organisation } from '@/types/auth'
 
 defineProps<{
   /**
-   * When true (collapsed sidebar), hide the name/sub meta text and
+   * When true (collapsed sidebar), hide the name meta text and
    * show only the logo square — mirrors crewli-starter's collapsed prop.
    */
   collapsed?: boolean
@@ -43,8 +43,6 @@ interface WorkspaceDisplay {
   id: string
   initials: string
   name: string
-  /** The role string is the relevant context identifier in Crewli. */
-  sub: string
   gradient: [string, string]
 }
 
@@ -60,7 +58,6 @@ function buildDisplay(org: Organisation): WorkspaceDisplay {
     id: org.id,
     initials,
     name: org.name,
-    sub: org.role,
     gradient: computeOrgGradient(org.id),
   }
 }
@@ -129,7 +126,7 @@ function selectOrg(ws: WorkspaceDisplay): void {
         {{ current.initials }}
       </span>
 
-      <!-- Meta: name + sub (hidden in collapsed mode) -->
+      <!-- Meta: name (hidden in collapsed mode) -->
       <!-- .ws-switcher .meta: flex-1, min-w-0, flex-col, line-height, text-left -->
       <span
         v-if="!collapsed && current"
@@ -139,10 +136,6 @@ function selectOrg(ws: WorkspaceDisplay): void {
         <span class="truncate text-[13.5px] font-semibold text-[var(--p-text-color)]">
           {{ current.name }}
         </span>
-        <!-- .ws-switcher .meta .sub: text-[11.5px], muted, truncate -->
-        <span class="truncate text-[11.5px] text-[var(--p-text-muted-color)]">
-          {{ current.sub }}
-        </span>
       </span>
 
       <!-- Chevron (.ws-switcher .chev: color fg-subtle, flex-shrink-0) -->
@@ -185,12 +178,10 @@ function selectOrg(ws: WorkspaceDisplay): void {
             :style="{ background: `linear-gradient(135deg, ${ws.gradient[0]}, ${ws.gradient[1]})` }"
           >{{ ws.initials }}</span>
 
-          <!-- Name + sub stack -->
+          <!-- Name -->
           <span>
             <!-- .pop-ws .opt .name -->
             <div class="text-[14px] font-semibold text-[var(--p-text-color)]">{{ ws.name }}</div>
-            <!-- .pop-ws .opt .sub -->
-            <div class="mt-[2px] text-[12.5px] text-[var(--p-text-muted-color)]">{{ ws.sub }}</div>
           </span>
 
           <!-- Check mark for active org (.pop-ws .opt .check-mark) -->
diff --git a/apps/app/src/components-v2/layout/__tests__/AppSidebar.spec.ts b/apps/app/src/components-v2/layout/__tests__/AppSidebar.spec.ts
index 32cce9b2..399c68c8 100644
--- a/apps/app/src/components-v2/layout/__tests__/AppSidebar.spec.ts
+++ b/apps/app/src/components-v2/layout/__tests__/AppSidebar.spec.ts
@@ -4,11 +4,14 @@
  * Strategy: mount with @vue/test-utils stubs for all heavy children (SidebarHeader,
  * SidebarNav, WorkspaceSwitcher, Drawer) so we test only:
  *   1. Renders the 3 child components (SidebarHeader, SidebarNav, WorkspaceSwitcher).
- *   2. Passes `groups` prop to SidebarNav.
- *   3. Mobile Drawer v-model:visible wires to shell.mobileOpen (get path).
- *   4. Drawer close (v-model:visible = false) calls shell.setMobileOpen(false).
- *   5. Drawer is NOT rendered when isMobile=false (desktop); IS rendered when isMobile=true.
- *   6. Desktop <aside> applies correct width class based on sidebarCollapsed.
+ *   2. Mobile Drawer v-model:visible wires to shell.mobileOpen (get path).
+ *   3. Drawer close (v-model:visible = false) calls shell.setMobileOpen(false).
+ *   4. Drawer is NOT rendered when isMobile=false (desktop); IS rendered when isMobile=true.
+ *   5. Desktop <aside> applies correct width class based on sidebarCollapsed.
+ *
+ * Plan 2.5 P4 (AD-2.5-B1): the `groups` prop was retired from AppSidebar/SidebarNav;
+ * SidebarNav now reads APP_NAVIGATION from `@/config/navigation` directly. The
+ * prior "passes groups prop to SidebarNav" assertion is therefore gone.
  *
  * Stubs: Drawer is stubbed with a simple slot passthrough so we can inspect
  * whether its `visible` prop is correctly bound to the store.
@@ -22,7 +25,6 @@ import { ref } from 'vue'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { useShellUiStore } from '@/stores/useShellUiStore'
 import AppSidebar from '@/components-v2/layout/AppSidebar.vue'
-import type { V2NavGroup } from '@/types/v2/nav'
 
 // ---------------------------------------------------------------------------
 // Mock @vueuse/core so we can control `isMobile` per test.
@@ -42,19 +44,6 @@ vi.mock('@vueuse/core', () => ({
   }),
 }))
 
-// ---------------------------------------------------------------------------
-// A minimal nav group fixture
-// ---------------------------------------------------------------------------
-
-const testGroups: V2NavGroup[] = [
-  {
-    label: 'Main',
-    items: [
-      { id: 'dashboard', label: 'Dashboard', icon: 'tabler-home', to: { name: 'dashboard' } },
-    ],
-  },
-]
-
 // ---------------------------------------------------------------------------
 // Stubs
 // ---------------------------------------------------------------------------
@@ -77,8 +66,8 @@ const globalStubs = {
   SidebarHeader: { name: 'SidebarHeader', template: '<div class="sidebar-header-stub" />' },
   SidebarNav: {
     name: 'SidebarNav',
-    props: ['groups', 'collapsed'],
-    template: '<div class="sidebar-nav-stub" :data-collapsed="collapsed" :data-groups-count="groups.length" />',
+    props: ['collapsed'],
+    template: '<div class="sidebar-nav-stub" :data-collapsed="collapsed" />',
   },
   WorkspaceSwitcher: {
     name: 'WorkspaceSwitcher',
@@ -87,9 +76,8 @@ const globalStubs = {
   },
 }
 
-function mountSidebar(groups: V2NavGroup[] = testGroups) {
+function mountSidebar() {
   return mount(AppSidebar, {
-    props: { groups },
     global: {
       plugins: [createPinia()],
       stubs: globalStubs,
@@ -127,14 +115,6 @@ describe('AppSidebar', () => {
     expect(wrapper.find('.workspace-switcher-stub').exists()).toBe(true)
   })
 
-  it('passes groups prop to SidebarNav', () => {
-    const wrapper = mountSidebar()
-    const nav = wrapper.find('.sidebar-nav-stub')
-
-    // Our stub renders data-groups-count from the groups prop
-    expect(nav.attributes('data-groups-count')).toBe(String(testGroups.length))
-  })
-
   // -------------------------------------------------------------------------
   // Drawer v-if: mount/unmount based on isMobile
   // -------------------------------------------------------------------------
diff --git a/apps/app/src/components-v2/layout/__tests__/WorkspaceSwitcher.spec.ts b/apps/app/src/components-v2/layout/__tests__/WorkspaceSwitcher.spec.ts
new file mode 100644
index 00000000..83e099d6
--- /dev/null
+++ b/apps/app/src/components-v2/layout/__tests__/WorkspaceSwitcher.spec.ts
@@ -0,0 +1,86 @@
+/**
+ * WorkspaceSwitcher.spec.ts — regression coverage for AD-2.5-W1.
+ *
+ * Scope: assert that the workspace switcher no longer renders a "sub" line
+ * (previously the role string sourced from org.role). The full popover /
+ * org-switch behaviour is left to Storybook visual coverage; this file
+ * exists solely as the AD-2.5-W1 lock against re-introduction of the sub
+ * meta line in the trigger or in the popover row.
+ */
+
+import { createPinia, setActivePinia } from 'pinia'
+import { mount } from '@vue/test-utils'
+import { beforeEach, describe, expect, it } from 'vitest'
+import { useAuthStore } from '@/stores/useAuthStore'
+import WorkspaceSwitcher from '@/components-v2/layout/WorkspaceSwitcher.vue'
+import type { Organisation, User } from '@/types/auth'
+
+const userFixture: User = {
+  id: 'usr_01',
+  first_name: 'Bert',
+  last_name: 'Hausmans',
+  full_name: 'Bert Hausmans',
+  date_of_birth: null,
+  email: 'bert@hausmans.nl',
+  phone: null,
+  timezone: 'Europe/Amsterdam',
+  locale: 'nl',
+  avatar: null,
+}
+
+const orgFixture: Organisation = {
+  id: 'org_a',
+  name: 'Festival Crew NL',
+  slug: 'festival-crew-nl',
+  role: 'org_admin',
+}
+
+const globalStubs = {
+  Icon: { template: '<span class="icon-stub" />' },
+  Popover: {
+    name: 'Popover',
+    template: '<div class="popover-stub"><slot /></div>',
+    methods: {
+      toggle() {},
+      hide() {},
+    },
+  },
+}
+
+function mountSwitcher() {
+  setActivePinia(createPinia())
+
+  const auth = useAuthStore()
+
+  auth.user = userFixture
+  auth.organisations = [orgFixture]
+
+  return mount(WorkspaceSwitcher, {
+    props: { collapsed: false },
+    global: {
+      stubs: globalStubs,
+    },
+  })
+}
+
+describe('WorkspaceSwitcher', () => {
+  beforeEach(() => {
+    setActivePinia(createPinia())
+  })
+
+  it('does not render a sub line (AD-2.5-W1)', () => {
+    const wrapper = mountSwitcher()
+
+    // Role string used to back the sub line — must not leak into rendered output.
+    expect(wrapper.text()).not.toContain(orgFixture.role)
+
+    // No selector / class tied to the removed sub element.
+    expect(wrapper.html()).not.toMatch(/workspace-sub|ws-sub|meta-sub/)
+  })
+
+  it('renders the workspace name', () => {
+    const wrapper = mountSwitcher()
+
+    expect(wrapper.text()).toContain(orgFixture.name)
+  })
+})
diff --git a/apps/app/src/config/navigation.ts b/apps/app/src/config/navigation.ts
index d285173b..1872fa83 100644
--- a/apps/app/src/config/navigation.ts
+++ b/apps/app/src/config/navigation.ts
@@ -3,10 +3,11 @@
 // Future extensions (role filtering, feature flags, dynamic ordering) are
 // explicit follow-up RFCs — DO NOT add those fields here without one.
 //
-// As of Plan 2.5 P1, only one v2 route exists (/v2/dashboard → v2-dashboard).
-// As pages-v2/ grows, add an entry per route here so both the sidebar (via
-// SidebarNav, wired in P4) and the breadcrumb (via useNavBreadcrumb) update
-// from one place.
+// As of Plan 2.5 P4, SidebarNav consumes this directly. Only the Dashboard
+// entry currently has a v2 route (v2-dashboard); all other entries are
+// dormant placeholders (routeName: undefined) until their respective
+// pages-v2/<page>.vue lands. Cross-app linking to v1 routes is NOT allowed
+// — dormant items render as label-only non-clickable in the sidebar.
 
 export interface NavItem {
 
@@ -41,4 +42,51 @@ export const APP_NAVIGATION: NavItem[] = [
     routeName: 'v2-dashboard',
     icon: 'tabler-home',
   },
+
+  // TODO: assign route when v2-events page lands
+  {
+    key: 'events',
+    label: 'Evenementen',
+    icon: 'tabler-calendar-event',
+  },
+  {
+    key: 'beheer',
+    label: 'Beheer',
+    children: [
+      // TODO: assign route when v2-organisation page lands
+      {
+        key: 'organisation',
+        label: 'Mijn Organisatie',
+        icon: 'tabler-building',
+      },
+
+      // TODO: assign route when v2-members page lands
+      {
+        key: 'members',
+        label: 'Leden',
+        icon: 'tabler-users',
+      },
+
+      // TODO: assign route when v2-organisation-companies page lands
+      {
+        key: 'organisation-companies',
+        label: 'Bedrijven',
+        icon: 'tabler-building',
+      },
+
+      // TODO: assign route when v2-organisation-form-failures page lands
+      {
+        key: 'organisation-form-failures',
+        label: 'Form failures',
+        icon: 'tabler-alert-triangle',
+      },
+
+      // TODO: assign route when v2-organisation-settings page lands
+      {
+        key: 'organisation-settings',
+        label: 'Instellingen',
+        icon: 'tabler-settings',
+      },
+    ],
+  },
 ]
diff --git a/apps/app/src/layouts/OrganizerLayoutV2.vue b/apps/app/src/layouts/OrganizerLayoutV2.vue
index b00561d1..713dc302 100644
--- a/apps/app/src/layouts/OrganizerLayoutV2.vue
+++ b/apps/app/src/layouts/OrganizerLayoutV2.vue
@@ -8,28 +8,24 @@
  * the ported PrimeVue shell pieces (AppSidebar / AppTopbar / RightDrawer)
  * and renders routed pages via <RouterView/> in the default slot.
  *
- * Nav data is sourced HERE: the layouts zone may import @/navigation,
- * whereas components-v2 may NOT (import-boundary matrix). orgNavItems is
- * folded into V2NavGroup[] by useV2Nav() and passed to AppSidebar :groups.
+ * Plan 2.5 P4 (AD-2.5-B1): SidebarNav now consumes APP_NAVIGATION from
+ * `@/config/navigation` directly. This layout no longer derives or
+ * passes nav data; the `useV2Nav(orgNavItems)` plumbing has been retired.
  *
  * No provide/inject: each shell piece reads its own state from
  * useShellUiStore / useAuthStore (RFC AD-G4). This layout wires
- * composition + nav data only; it owns no shell state.
+ * composition only; it owns no shell state.
  */
-import { orgNavItems } from '@/navigation/vertical'
-import { useV2Nav } from '@/composables/useV2Nav'
 import AppShellV2 from '@/layouts/components/AppShellV2.vue'
 import AppSidebar from '@/components-v2/layout/AppSidebar.vue'
 import AppTopbar from '@/components-v2/layout/AppTopbar.vue'
 import RightDrawer from '@/components-v2/layout/RightDrawer.vue'
-
-const { groups } = useV2Nav(orgNavItems)
 </script>
 
 <template>
   <AppShellV2>
     <template #sidebar>
-      <AppSidebar :groups="groups" />
+      <AppSidebar />
     </template>
 
     <template #topbar>
diff --git a/apps/app/tests/component/layouts/OrganizerLayoutV2.spec.ts b/apps/app/tests/component/layouts/OrganizerLayoutV2.spec.ts
index 7100b7a8..9b944d94 100644
--- a/apps/app/tests/component/layouts/OrganizerLayoutV2.spec.ts
+++ b/apps/app/tests/component/layouts/OrganizerLayoutV2.spec.ts
@@ -7,13 +7,15 @@ import OrganizerLayoutV2 from '@/layouts/OrganizerLayoutV2.vue'
 import AppShellV2 from '@/layouts/components/AppShellV2.vue'
 
 // Stub the 3 leaf shell components: this test verifies COMPOSITION
-// (right component in right slot + nav data forwarded), not their
-// internals (those have their own unit tests). Stubs keep jsdom free
-// of PrimeVue teleport/overlay/breakpoint machinery.
+// (right component in right slot), not their internals (those have
+// their own unit tests). Stubs keep jsdom free of PrimeVue teleport/
+// overlay/breakpoint machinery.
+//
+// Plan 2.5 P4 (AD-2.5-B1): AppSidebar no longer takes a `groups` prop
+// — SidebarNav reads APP_NAVIGATION from `@/config/navigation` directly.
 const AppSidebarStub = defineComponent({
   name: 'AppSidebarStub',
-  props: { groups: { type: Array, default: () => [] } },
-  template: '<aside data-testid="sidebar-stub" :data-groups-count="groups.length" />',
+  template: '<aside data-testid="sidebar-stub" />',
 })
 
 const AppTopbarStub = defineComponent({
@@ -59,15 +61,6 @@ describe('OrganizerLayoutV2 (wired shell)', () => {
     expect(wrapper.find('[data-testid="page"]').exists()).toBe(true)
   })
 
-  it('forwards orgNavItems folded into V2NavGroup[] to AppSidebar :groups', async () => {
-    const wrapper = await mountLayout()
-    const sidebar = wrapper.find('[data-testid="sidebar-stub"]')
-
-    // orgNavItems has link entries + a {heading:'Beheer'} → useV2Nav folds
-    // into ≥1 group. A non-zero count proves the nav chain is wired.
-    expect(Number(sidebar.attributes('data-groups-count'))).toBeGreaterThan(0)
-  })
-
   it('no longer renders the Plan-1 skeleton placeholders', async () => {
     const wrapper = await mountLayout()