diff --git a/src/facade/Makefile b/src/facade/Makefile
index 8280fac..b2fb2e1 100644
--- a/src/facade/Makefile
+++ b/src/facade/Makefile
@@ -6,7 +6,7 @@
 # Run `make sync` after every Wippy Web Host version bump to pull fresh copies.
 
 # Web Host CDN base — update version when Wippy Web Host releases
-WEB_HOST_CDN = https://web-host.wippy.ai/webcomponents-1.0.23
+WEB_HOST_CDN = https://web-host.wippy.ai/webcomponents-1.0.25
 
 # Files to sync from CDN into public/@wippy-fe/
 CDN_FILES = loading.js
diff --git a/src/facade/README.md b/src/facade/README.md
index 94f63a1..6692202 100644
--- a/src/facade/README.md
+++ b/src/facade/README.md
@@ -7,10 +7,29 @@ Portable iframe facade for the Wippy frontend. Serves a thin HTML shell that loa
 1. `index.html` is served as a static file via `http.static`
 2. On load, it fetches `GET /api/public/facade/config` to get runtime configuration
 3. Checks `localStorage` for an auth token, redirects to `login_path` if missing
-4. Loads the Web Host bundle from CDN (`facade_url + '/module.js'`)
-5. Calls `initWippyApp()` with the full AppConfig (wippy-context-2.0 format)
+4. Loads the Web Host bundle from CDN — picks the module file based on `fe_mode`:
+   - `compat` (default) → `module.js` — full Wippy host chrome
+   - `managed` → `managed-layout.js` — declarative multi-panel host driven by `hostConfig.layout`
+5. Calls `window.initWippyApp(config)` — both entries expose the same symbol; the mounted shell is the only difference
 6. Shows `<wippy-loading>` / `<wippy-error>` during initialization (vendored from Wippy Web Host CDN)
 
+## Modes
+
+| Mode | Entry loaded | Mounted shell | Use case |
+|---|---|---|---|
+| `compat` _(default)_ | `module.js` | Full Wippy chrome (sidebar + chat + pages + right panel) | Backwards-compatible — existing facades keep working unchanged |
+| `managed` | `managed-layout.js` | Declarative multi-panel layout — no default chrome, every panel declared via `hostConfig.layout` | IDE-style apps, dashboards, Adobe-style multi-pane tools |
+
+Both entries expose the same `window.initWippyApp(config, rootContainer?)` signature — the parent integration code does not change between modes. Set via the `fe_mode` requirement; unknown values normalize to `compat`.
+
+### When to switch to `managed` mode
+
+- You want a multi-panel app with separator-drag resizing
+- You want to embed a custom panel configuration driven by config (not by the standard sidebar/chat layout)
+- You want breakpoint-responsive layouts (desktop vs mobile)
+
+Leave `fe_mode` at `compat` unless you have a specific reason to opt in — the managed shell omits every piece of default Wippy chrome (no sidebar, no chat wrapper, no right panel) and expects the declaration to provide equivalents.
+
 ## Vendored CDN files
 
 `public/@wippy-fe/` contains files copied from the Wippy Web Host CDN. These are loaded before the CDN URL is known (pre-config-fetch), so they must be vendored locally.
@@ -47,8 +66,9 @@ These fields are NOT configurable via requirements — they are computed at runt
 
 | Requirement | Default | Description |
 |---|---|---|
-| `fe_facade_url` | `https://web-host.wippy.ai/webcomponents-1.0.23` | CDN base URL for the Web Host frontend bundle |
+| `fe_facade_url` | `https://web-host.wippy.ai/webcomponents-1.0.25` | CDN base URL for the Web Host frontend bundle |
 | `fe_entry_path` | `/iframe.html` | Iframe HTML entry point path (appended to `fe_facade_url`) |
+| `fe_mode` | `compat` | `compat` (default — loads `module.js`) or `managed` (loads `managed-layout.js` for declarative multi-panel apps). See [Modes](#modes) above |
 
 ### App Identity
 
@@ -189,9 +209,9 @@ Only override what differs from defaults.
 
 ```json
 {
-  "facade_url": "https://web-host.wippy.ai/webcomponents-1.0.23",
+  "facade_url": "https://web-host.wippy.ai/webcomponents-1.0.25",
   "iframe_origin": "https://web-host.wippy.ai",
-  "iframe_url": "https://web-host.wippy.ai/webcomponents-1.0.23/iframe.html?waitForCustomConfig",
+  "iframe_url": "https://web-host.wippy.ai/webcomponents-1.0.25/iframe.html?waitForCustomConfig",
   "login_path": "/login.html",
   "env": {
     "APP_API_URL": "http://localhost:8085",
diff --git a/src/facade/_index.yaml b/src/facade/_index.yaml
index 57b3cce..8851c78 100644
--- a/src/facade/_index.yaml
+++ b/src/facade/_index.yaml
@@ -33,7 +33,7 @@ entries:
     targets:
       - entry: wippy.facade:fe_facade_url
         path: .default
-    default: https://web-host.wippy.ai/webcomponents-1.0.23
+    default: https://web-host.wippy.ai/webcomponents-1.0.25
 
   - name: fe_entry_path
     kind: ns.requirement
@@ -44,6 +44,19 @@ entries:
         path: .default
     default: /iframe.html
 
+  - name: fe_mode
+    kind: ns.requirement
+    meta:
+      description: |
+        Frontend bundle mode. `compat` (default) loads module.js and renders
+        the standard Wippy host (sidebar + chat + pages + right panel).
+        `managed` loads managed-layout.js and renders a declarative
+        multi-panel host defined by hostConfig.layout — no default chrome.
+    targets:
+      - entry: wippy.facade:fe_mode
+        path: .default
+    default: compat
+
   # App identity
   - name: app_title
     kind: ns.requirement
diff --git a/src/facade/config_handler.lua b/src/facade/config_handler.lua
index b9973cd..edfde68 100644
--- a/src/facade/config_handler.lua
+++ b/src/facade/config_handler.lua
@@ -83,6 +83,17 @@ local function handler()
 
     local facade_url = get_req("fe_facade_url")
     local entry_path = get_req("fe_entry_path")
+    local fe_mode = get_req("fe_mode")
+
+    -- Normalize mode: anything other than "managed" falls back to compat.
+    if fe_mode ~= "managed" then
+        fe_mode = "compat"
+    end
+
+    -- Module filename loaded by index.html. `compat` keeps the historical
+    -- module.js (full Wippy host chrome); `managed` loads managed-layout.js
+    -- (declarative multi-panel host via hostConfig.layout).
+    local module_file = fe_mode == "managed" and "/managed-layout.js" or "/module.js"
 
     local iframe_origin: string? = ""
     if facade_url ~= "" then
@@ -164,6 +175,8 @@ local function handler()
         iframe_origin = iframe_origin,
         iframe_url = iframe_url,
         login_path = get_req("login_path"),
+        mode = fe_mode,
+        module_file = module_file,
 
         env = {
             APP_API_URL = api_url,
diff --git a/src/facade/config_handler_test.lua b/src/facade/config_handler_test.lua
index e719b6c..52ef495 100644
--- a/src/facade/config_handler_test.lua
+++ b/src/facade/config_handler_test.lua
@@ -112,7 +112,7 @@ local function define_tests()
             end)
 
             test.it("extracts iframe origin from facade URL", function()
-                local facade_url = "https://web-host.wippy.ai/webcomponents-1.0.23"
+                local facade_url = "https://web-host.wippy.ai/webcomponents-1.0.25"
                 local origin = facade_url:match("^(https?://[^/]+)")
 
                 test.eq(origin, "https://web-host.wippy.ai")
diff --git a/src/facade/public/index.html b/src/facade/public/index.html
index eb09f9e..4c72793 100644
--- a/src/facade/public/index.html
+++ b/src/facade/public/index.html
@@ -80,11 +80,16 @@
             console.warn('Failed to load import map:', e);
         }
 
-        // Now safe to load modules — import map is already in the DOM
+        // Now safe to load modules — import map is already in the DOM.
+        // `cfg.module_file` is "/module.js" (compat) or "/managed-layout.js"
+        // (managed). Both entries set the same `window.initWippyApp` symbol;
+        // the rendered shell is the only difference. Backend normalizes
+        // unknown modes to "compat", so the fallback below is purely defensive.
+        var moduleFile = cfg.module_file || '/module.js';
         try {
-            await import(cfg.facade_url + '/module.js');
+            await import(cfg.facade_url + moduleFile);
         } catch (importErr) {
-            showError('Failed to load frontend bundle', 'Could not load ' + cfg.facade_url + '/module.js — ' + importErr.message);
+            showError('Failed to load frontend bundle', 'Could not load ' + cfg.facade_url + moduleFile + ' — ' + importErr.message);
             throw importErr;
         }