diff --git a/docs/index.html b/docs/index.html
index 854e488..95aca56 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -1170,6 +1170,12 @@ <h2>Insights & Signal Finder</h2>
   </main>
 
   <script type="module">
+    // Auto-redirect to Preview interface (Production is deprecated with known bugs)
+    // Allow ?legacy=1 to bypass redirect for testing
+    if (!window.location.search.includes('legacy=1')) {
+      window.location.replace('./preview/');
+    }
+    
     let activeThemes = new Set([
       "image",
       "labor",
diff --git a/docs/interfaces.md b/docs/interfaces.md
index 244267a..d19ff86 100644
--- a/docs/interfaces.md
+++ b/docs/interfaces.md
@@ -34,7 +34,7 @@ Stable, proven interface for general collection exploration and research.
 - **Data Source**: `docs/data/sekula_inventory.json` (CSV-compatible format)
 
 ### Status
-⚠️ **Deprecated**: Known performance issues with large datasets (freezing, slow rendering). Users are automatically redirected to Preview v2.x for the best experience.
+⚠️ **Deprecated**: Known performance issues with large datasets (freezing, slow rendering). Users are automatically redirected to Preview v2.x for the best experience. To access the legacy Production interface for testing purposes, append `?legacy=1` to the URL.
 
 ### Features
 - **Virtual Shelf**: Books rendered as colored spines in LC call number order