diff --git a/CHANGELOG.md b/CHANGELOG.md
index 05b10c9..3390c42 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ Follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) · versioned wi
 ## [Unreleased]
 
 ### Changed
+- **Engine support namespace migration.** ElevenLabs browser state, custom engine cards, and local-container discovery
+  now use a private scope with explicit compatibility exports and a `window.TTVC.engines` API.
 - **Routing namespace migration.** Route configuration, sound selection, speed previews, routing tests, and routing-log
   rendering now use a private scope with live compatibility accessors and a `window.TTVC.routing` API.
 - **Voice-source namespace migration.** Source URL management, filtering, source metadata normalization, and library
diff --git a/VERSION b/VERSION
index 3b3fac8..5297a1a 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.24.78
+1.24.79
diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index 1adf4a7..8bf824c 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -68,6 +68,7 @@ Done incrementally as global-scope ordered files (no ES-module change needed) 
 - ✅ Voice-clone audio, recording, and design controls use a private scope with explicit compatibility exports.
 - ✅ Voice-source discovery and import helpers use a private scope with explicit source-list/import compatibility exports.
 - ✅ TTS routing configuration and routing-log UI use a private scope with live route/sound compatibility accessors.
+- ✅ Engine browser, custom-card, and local-container helpers use a private scope with an explicit namespace API.
 - ✅ `static/css/resource-diagnostics.css` — isolated Performance/resource diagnostic panel styles.
 - ✅ `static/css/background-jobs.css` — isolated background-job history and retry-panel styles.
 - ✅ `static/css/voice-design.css` — isolated Voice Design form, samples, and preview-match styles.
diff --git a/static/index.html b/static/index.html
index 78527b0..e6ce042 100644
--- a/static/index.html
+++ b/static/index.html
@@ -10,7 +10,7 @@
   <meta name="format-detection" content="telephone=no">
   <meta name="color-scheme" content="light dark">
   <meta name="theme-color" content="#2563EB">
-  <meta name="app-version" content="1.24.78">
+  <meta name="app-version" content="1.24.79">
   <link rel="manifest" href="/manifest.webmanifest">
   <link rel="icon" href="/static/icon.svg" type="image/svg+xml">
   <link rel="apple-touch-icon" href="/static/icon.svg">
@@ -27,12 +27,12 @@
 
   <!-- ── Core styles (local — no CDN dependency for first paint) ────────── -->
   <link rel="stylesheet" href="/static/vendor/mdi/materialdesignicons.min.css">
-  <link rel="stylesheet" href="/static/style.css?v=1.24.78">
-  <link rel="stylesheet" href="/static/css/resource-diagnostics.css?v=1.24.78">
-  <link rel="stylesheet" href="/static/css/background-jobs.css?v=1.24.78">
-  <link rel="stylesheet" href="/static/css/voice-design.css?v=1.24.78">
-  <link rel="stylesheet" href="/static/css/rehearser.css?v=1.24.78">
-  <link rel="stylesheet" href="/static/css/audiobook.css?v=1.24.78">
+  <link rel="stylesheet" href="/static/style.css?v=1.24.79">
+  <link rel="stylesheet" href="/static/css/resource-diagnostics.css?v=1.24.79">
+  <link rel="stylesheet" href="/static/css/background-jobs.css?v=1.24.79">
+  <link rel="stylesheet" href="/static/css/voice-design.css?v=1.24.79">
+  <link rel="stylesheet" href="/static/css/rehearser.css?v=1.24.79">
+  <link rel="stylesheet" href="/static/css/audiobook.css?v=1.24.79">
 
 
   <!-- ── Flag icons — non-blocking (loaded async, icons appear after JS) ── -->
@@ -397,7 +397,7 @@ window.toggleNavTree = function(treeId, chevronId) {
 </script>
 
 <!-- loader.js: fetches sections → loads JS modules → removes skeleton -->
-<script src="/static/loader.js?v=1.24.78"></script>
+<script src="/static/loader.js?v=1.24.79"></script>
 
 </body>
 </html>
diff --git a/static/js/engines.js b/static/js/engines.js
index a64f71d..dcde276 100644
--- a/static/js/engines.js
+++ b/static/js/engines.js
@@ -1,5 +1,7 @@
 // ── ElevenLabs Voice Library Browser ──────────────────────────────────────
 
+(function (root) {
+
 let _elevenLabsBrowserReady = false;
 function initElevenLabsBrowser() {
   if (_elevenLabsBrowserReady || !$('el-browser-card')) return;
@@ -846,3 +848,18 @@ function renderLocalContainers(containers) {
 }
 
 document.querySelectorAll('.dc-refresh-btn').forEach(b => b.addEventListener('click', loadLocalContainers));
+
+Object.assign(root, {
+  _elevenLabsBrowserReady, initElevenLabsBrowser, _localContainersLoadSeq,
+  loadCustomEngineCards, saveCustomEngineCards, DC_USE_MAP, DC_ROLE_USE,
+  editCustomEngineCard, _lastLocalContainers, cardType, _dcSkel,
+  fetchLocalContainersWithRetry, loadLocalContainers, renderLocalContainers,
+});
+root.TTVC = root.TTVC || {};
+root.TTVC.engines = root.TTVC.engines || {};
+Object.assign(root.TTVC.engines, {
+  browser: { init: initElevenLabsBrowser },
+  cards: { load: loadCustomEngineCards, save: saveCustomEngineCards, edit: editCustomEngineCard },
+  containers: { load: loadLocalContainers, render: renderLocalContainers },
+});
+})(window);