diff --git a/.jules/bolt.md b/.jules/bolt.md
new file mode 100644
index 0000000000..4c138e4dcb
--- /dev/null
+++ b/.jules/bolt.md
@@ -0,0 +1,3 @@
+## 2024-04-28 - Component Array Sorting Performance
+**Learning:** In React components like `ConversationsSidebar`, copying and sorting arrays on every render (e.g., `[...conversations].sort(...)`) causes unnecessary object allocation and CPU overhead, especially if the component has local state causing frequent re-renders (like input selection). Additionally, when dealing with standard ISO 8601 timestamp strings, allocating `new Date()` objects purely for chronological sorting is an expensive anti-pattern.
+**Action:** Always wrap array mapping/sorting in `useMemo` when deriving lists from props. Furthermore, use lexicographical string comparison (`b.localeCompare(a)`) to sort ISO 8601 date strings instead of parsing them into `Date` objects.
diff --git a/apps/app/src/components/ConversationsSidebar.tsx b/apps/app/src/components/ConversationsSidebar.tsx
index 75d768bee2..ee6319c5e9 100644
--- a/apps/app/src/components/ConversationsSidebar.tsx
+++ b/apps/app/src/components/ConversationsSidebar.tsx
@@ -2,7 +2,7 @@
  * Conversations sidebar component — left sidebar with conversation list.
  */
 
-import { useEffect, useRef, useState } from "react";
+import { useEffect, useMemo, useRef, useState } from "react";
 import { useApp } from "../AppContext";
 
 interface ConversationsSidebarProps {
@@ -54,11 +54,11 @@ export function ConversationsSidebar({
     }
   }, [editingId]);
 
-  const sortedConversations = [...conversations].sort((a, b) => {
-    const aTime = new Date(a.updatedAt).getTime();
-    const bTime = new Date(b.updatedAt).getTime();
-    return bTime - aTime;
-  });
+  const sortedConversations = useMemo(() => {
+    // ⚡ Bolt: Memoize the sorting and use lexicographical string comparison
+    // for ISO 8601 timestamps to avoid expensive new Date() allocations on every render.
+    return [...conversations].sort((a, b) => b.updatedAt.localeCompare(a.updatedAt));
+  }, [conversations]);
 
   const handleDoubleClick = (conv: { id: string; title: string }) => {
     setEditingId(conv.id);