diff --git a/src/manifest.json b/src/manifest.json
index c8be39b4..760c9ba3 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -563,7 +563,8 @@
 			"type": "flow",
 			"title": "Flow",
 			"config": { "app": "keepiq" },
-			"_note": "The shared CnFlowDetail canvas over the same single engine. Controls render in the NC app sidebar so the canvas keeps full width."
+			"sidebarComponent": "FlowDetailSidebar",
+			"_note": "The shared CnFlowDetail canvas over the same single engine. Controls render in the NC app sidebar (sidebarComponent) so the canvas keeps full width; canvas and sidebar share useFlowStore. The _note claimed this before the field existed, so #/flows/new -- and every #/flows/:id -- rendered a bare canvas with no way to name, describe, trigger or step-edit the flow. Mirrors pipelinq#1490."
 		}
 	],
 	"observability": {
diff --git a/src/registry.js b/src/registry.js
index 183b58c3..13d2e084 100644
--- a/src/registry.js
+++ b/src/registry.js
@@ -46,6 +46,7 @@ import ApplicationRegisterView from './views/ApplicationRegisterView.vue'
 import CertificateInventoryView from './views/CertificateInventoryView.vue'
 import EmergencyAccessView from './views/EmergencyAccessView.vue'
 import EphemeralSendAccess from './views/EphemeralSendAccess.vue'
+import FlowDetailSidebar from './views/flows/FlowDetailSidebar.vue'
 import HealthReportView from './views/HealthReportView.vue'
 import LinkShareAccess from './views/LinkShareAccess.vue'
 import LockScreen from './views/LockScreen.vue'
@@ -55,6 +56,12 @@ import SecretList from './views/SecretList.vue'
 import SecretRequestFill from './views/SecretRequestFill.vue'
 
 export default {
+	// --- Flows (ADR-110 Decision 4). Only the SIDEBAR is an app component;
+	//     the list and the canvas are the shared `flows` / `flow-detail`
+	//     manifest page types. CnFlowSidebar has to mount in the NC app
+	//     sidebar for the canvas to keep full width. ---
+	FlowDetailSidebar: { kind: 'page', component: FlowDetailSidebar },
+
 	LockScreen: { kind: 'page', component: LockScreen },
 	SecretList: { kind: 'page', component: SecretList },
 	SecretDetail: { kind: 'page', component: SecretDetail },
diff --git a/src/views/flows/FlowDetailSidebar.vue b/src/views/flows/FlowDetailSidebar.vue
new file mode 100644
index 00000000..fff85173
--- /dev/null
+++ b/src/views/flows/FlowDetailSidebar.vue
@@ -0,0 +1,26 @@
+<!-- SPDX-License-Identifier: EUPL-1.2 -->
+<!-- Copyright (C) 2026 Conduction B.V. -->
+<!--
+  The flow controls, in Nextcloud's app sidebar. Shares `useFlowStore` with the
+  canvas, which is why neither needs props from the other. Save/Run live on
+  CnFlowDetail's toolbar; the shared `flow-detail` page type handles them.
+
+  Without this, `#/flows/:id` (and `#/flows/new`, which is the same route with
+  the literal id `new`) renders a bare canvas: the toolbar can save and run a
+  flow but nothing can name it, describe it, pick its trigger or edit a step,
+  because every one of those controls lives in CnFlowSidebar. Mirrors
+  pipelinq/src/views/flows/FlowDetailSidebar.vue (pipelinq#1490).
+-->
+<template>
+	<CnFlowSidebar />
+</template>
+
+<script>
+import { CnFlowSidebar } from '@conduction/nextcloud-vue'
+
+export default {
+	name: 'FlowDetailSidebar',
+
+	components: { CnFlowSidebar },
+}
+</script>