diff --git a/packages/app/src/pages/layout/sidebar-items.tsx b/packages/app/src/pages/layout/sidebar-items.tsx
index 75dada05f0..058bb5a0db 100644
--- a/packages/app/src/pages/layout/sidebar-items.tsx
+++ b/packages/app/src/pages/layout/sidebar-items.tsx
@@ -16,6 +16,7 @@ import { getAvatarColors, type LocalProject, useLayout } from "@/context/layout"
 import { useNotification } from "@/context/notification"
 import { usePermission } from "@/context/permission"
 import { messageAgentColor } from "@/utils/agent"
+import { sessionTitle } from "@/utils/session-title"
 import { sessionPermissionRequest } from "../session/composer/session-request-tree"
 import { hasProjectPermissions } from "./helpers"
 
@@ -101,42 +102,46 @@ const SessionRow = (props: {
   warmPress: () => void
   warmFocus: () => void
   cancelHoverPrefetch: () => void
-}): JSX.Element => (
-  <A
-    href={`/${props.slug}/session/${props.session.id}`}
-    class={`flex items-center gap-1 min-w-0 w-full text-left focus:outline-none ${props.dense ? "py-0.5" : "py-1"}`}
-    onPointerDown={props.warmPress}
-    onPointerEnter={props.warmHover}
-    onPointerLeave={props.cancelHoverPrefetch}
-    onFocus={props.warmFocus}
-    onClick={() => {
-      props.setHoverSession(undefined)
-      if (props.sidebarOpened()) return
-      props.clearHoverProjectSoon()
-    }}
-  >
-    <div
-      class="shrink-0 size-6 flex items-center justify-center"
-      style={{ color: props.tint() ?? "var(--icon-interactive-base)" }}
+}) => {
+  const title = () => sessionTitle(props.session.title)
+
+  return (
+    <A
+      href={`/${props.slug}/session/${props.session.id}`}
+      class={`flex items-center gap-1 min-w-0 w-full text-left focus:outline-none ${props.dense ? "py-0.5" : "py-1"}`}
+      onPointerDown={props.warmPress}
+      onPointerEnter={props.warmHover}
+      onPointerLeave={props.cancelHoverPrefetch}
+      onFocus={props.warmFocus}
+      onClick={() => {
+        props.setHoverSession(undefined)
+        if (props.sidebarOpened()) return
+        props.clearHoverProjectSoon()
+      }}
     >
-      <Switch fallback={<Icon name="dash" size="small" class="text-icon-weak" />}>
-        <Match when={props.isWorking()}>
-          <Spinner class="size-[15px]" />
-        </Match>
-        <Match when={props.hasPermissions()}>
-          <div class="size-1.5 rounded-full bg-surface-warning-strong" />
-        </Match>
-        <Match when={props.hasError()}>
-          <div class="size-1.5 rounded-full bg-text-diff-delete-base" />
-        </Match>
-        <Match when={props.unseenCount() > 0}>
-          <div class="size-1.5 rounded-full bg-text-interactive-base" />
-        </Match>
-      </Switch>
-    </div>
-    <span class="text-14-regular text-text-strong min-w-0 flex-1 truncate">{props.session.title}</span>
-  </A>
-)
+      <div
+        class="shrink-0 size-6 flex items-center justify-center"
+        style={{ color: props.tint() ?? "var(--icon-interactive-base)" }}
+      >
+        <Switch fallback={<Icon name="dash" size="small" class="text-icon-weak" />}>
+          <Match when={props.isWorking()}>
+            <Spinner class="size-[15px]" />
+          </Match>
+          <Match when={props.hasPermissions()}>
+            <div class="size-1.5 rounded-full bg-surface-warning-strong" />
+          </Match>
+          <Match when={props.hasError()}>
+            <div class="size-1.5 rounded-full bg-text-diff-delete-base" />
+          </Match>
+          <Match when={props.unseenCount() > 0}>
+            <div class="size-1.5 rounded-full bg-text-interactive-base" />
+          </Match>
+        </Switch>
+      </div>
+      <span class="text-14-regular text-text-strong min-w-0 flex-1 truncate">{title()}</span>
+    </A>
+  )
+}
 
 const SessionHoverPreview = (props: {
   mobile?: boolean
@@ -319,7 +324,7 @@ export const SessionItem = (props: SessionItemProps): JSX.Element => {
             fallback={
               <Tooltip
                 placement={props.mobile ? "bottom" : "right"}
-                value={props.session.title}
+                value={sessionTitle(props.session.title)}
                 gutter={10}
                 class="min-w-0 w-full"
               >
diff --git a/packages/app/src/pages/session/message-timeline.tsx b/packages/app/src/pages/session/message-timeline.tsx
index e1d6da1958..cbabbda72d 100644
--- a/packages/app/src/pages/session/message-timeline.tsx
+++ b/packages/app/src/pages/session/message-timeline.tsx
@@ -29,6 +29,7 @@ import { useSettings } from "@/context/settings"
 import { useSDK } from "@/context/sdk"
 import { useSync } from "@/context/sync"
 import { messageAgentColor } from "@/utils/agent"
+import { sessionTitle } from "@/utils/session-title"
 import { parseCommentNote, readCommentMetadata } from "@/utils/comment-note"
 import { makeTimer } from "@solid-primitives/timer"
 
@@ -43,7 +44,6 @@ type MessageComment = {
 
 const emptyMessages: MessageType[] = []
 const idle = { type: "idle" as const }
-
 type UserActions = {
   fork?: (input: { sessionID: string; messageID: string }) => Promise<void> | void
   revert?: (input: { sessionID: string; messageID: string }) => Promise<void> | void
@@ -291,6 +291,7 @@ export function MessageTimeline(props: {
     return sync.session.get(id)
   })
   const titleValue = createMemo(() => info()?.title)
+  const titleLabel = createMemo(() => sessionTitle(titleValue()))
   const shareUrl = createMemo(() => info()?.share?.url)
   const shareEnabled = createMemo(() => sync.data.config.share !== "disabled")
   const parentID = createMemo(() => info()?.parentID)
@@ -399,7 +400,7 @@ export function MessageTimeline(props: {
 
   const openTitleEditor = () => {
     if (!sessionID()) return
-    setTitle({ editing: true, draft: titleValue() ?? "" })
+    setTitle({ editing: true, draft: titleLabel() ?? "" })
     requestAnimationFrame(() => {
       titleRef?.focus()
       titleRef?.select()
@@ -417,7 +418,7 @@ export function MessageTimeline(props: {
     if (titleMutation.isPending) return
 
     const next = title.draft.trim()
-    if (!next || next === (titleValue() ?? "")) {
+    if (!next || next === (titleLabel() ?? "")) {
       setTitle("editing", false)
       return
     }
@@ -532,7 +533,9 @@ export function MessageTimeline(props: {
   }
 
   function DialogDeleteSession(props: { sessionID: string }) {
-    const name = createMemo(() => sync.session.get(props.sessionID)?.title ?? language.t("command.session.new"))
+    const name = createMemo(
+      () => sessionTitle(sync.session.get(props.sessionID)?.title) ?? language.t("command.session.new"),
+    )
     const handleDelete = async () => {
       await deleteSession(props.sessionID)
       dialog.close()
@@ -673,7 +676,7 @@ export function MessageTimeline(props: {
                           </div>
                         </Show>
                       </div>
-                      <Show when={titleValue() || title.editing}>
+                      <Show when={titleLabel() || title.editing}>
                         <Show
                           when={title.editing}
                           fallback={
@@ -681,7 +684,7 @@ export function MessageTimeline(props: {
                               class="text-14-medium text-text-strong truncate grow-1 min-w-0"
                               onDblClick={openTitleEditor}
                             >
-                              {titleValue()}
+                              {titleLabel()}
                             </h1>
                           }
                         >
diff --git a/packages/app/src/utils/session-title.ts b/packages/app/src/utils/session-title.ts
new file mode 100644
index 0000000000..ca04c01047
--- /dev/null
+++ b/packages/app/src/utils/session-title.ts
@@ -0,0 +1,7 @@
+const pattern = /^(New session|Child session) - \d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/
+
+export function sessionTitle(title?: string) {
+  if (!title) return title
+  const match = title.match(pattern)
+  return match?.[1] ?? title
+}