diff --git a/designsafe/templates/snippets/js-bootstrap-accordion-open-via-url-hash.html b/designsafe/templates/snippets/js-bootstrap-accordion-open-via-url-hash.html
new file mode 100644
index 000000000..2b6cee479
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+++ b/designsafe/templates/snippets/js-bootstrap-accordion-open-via-url-hash.html
@@ -0,0 +1,94 @@
+<script type="module" id="js-bootstrap-accordion-open-via-url-hash">
+/* Accordion hash opener for Bootstrap 3 (djangocms-cascade v0.16.3)
+    1. Looks for URL hash.
+    2. Opens the corresponding collapse panel if present.
+    3. Intentionally defensive about id formats.
+*/
+(function () {
+  // run the core logic once jQuery is available
+  var run = function ($) {
+    $(function () {
+      try {
+        var hash = window.location.hash;
+        if (!hash) {
+          console.log('[accordion-hash] no hash present, exiting');
+          return;
+        }
+        // Prefer getElementById to avoid CSS selector escaping issues
+        var target = null;
+        var id = hash.replace('#', '');
+        try {
+          var el = document.getElementById(id);
+          if (el) {
+            console.log('[accordion-hash] found element by getElementById', el);
+            target = $(el);
+          } else {
+            console.log('[accordion-hash] no element found by getElementById');
+          }
+        } catch (e) {
+          console.log('[accordion-hash] getElementById threw', e);
+          target = null;
+        }
+        // If not found by id, try a safe selector (use CSS.escape if available)
+        if (!target || !target.length) {
+          var selector = hash;
+          if (id && window.CSS && typeof CSS.escape === 'function') {
+            selector = '#' + CSS.escape(id);
+          }
+          target = $(selector);
+        }
+        if (!target || !target.length) {
+          // still not found: try common cascade pattern: cmsplugin_<pluginid>_<index>
+          var candidate = '#cmsplugin_' + id + '_0';
+          console.log('[accordion-hash] trying candidate', candidate);
+          if ($(candidate).length) {
+            console.log('[accordion-hash] found candidate', candidate);
+            target = $(candidate);
+          }
+          // try collapse_ prefix
+          candidate = '#collapse_' + id;
+          console.log('[accordion-hash] trying candidate', candidate);
+          if ($(candidate).length) {
+            console.log('[accordion-hash] found candidate', candidate);
+            target = $(candidate);
+          }
+        }
+        if (!target || !target.length) return;
+        // Use bootstrap collapse API to show it (Bootstrap 3 jQuery plugin)
+        if (typeof target.collapse === 'function') {
+          console.log('[accordion-hash] calling target.collapse("show")');
+          target.collapse('show');
+        } else {
+          // fallback: add class used by BS3
+          console.log('[accordion-hash] collapse plugin not available, adding class "in"');
+          target.addClass('in');
+        }
+        // scroll to header if possible
+        var header = $('[href="#' + target.attr('id') + '"]');
+        var el = header.length ? header : target;
+        if (el.length) {
+          var pos = el.offset().top - 10;
+          console.log('[accordion-hash] scrolling to pos', pos);
+          $('html,body').animate({scrollTop: pos}, 250);
+        }
+      } catch (e) {
+        // fail loudly for debugging
+        console.error && console.error('accordion-hash error', e);
+      }
+    });
+  };
+
+  if (window.jQuery) {
+    run(window.jQuery);
+  } else {
+    // jQuery not yet available; wait for window load which should occur after scripts at bottom
+    window.addEventListener('load', function () {
+      if (window.jQuery) {
+        run(window.jQuery);
+      } else {
+        console.error && console.error('[accordion-hash] jQuery not found after window.load; aborting');
+      }
+    });
+  }
+})();
+</script>