diff --git a/src/shared/agent-hook-listener-jcode.test.ts b/src/shared/agent-hook-listener-jcode.test.ts
index b2aa8abaa9e..3d35729fa61 100644
--- a/src/shared/agent-hook-listener-jcode.test.ts
+++ b/src/shared/agent-hook-listener-jcode.test.ts
@@ -158,6 +158,31 @@ describe('shared agent-hook-listener: jcode', () => {
     })
   })
 
+  it('keeps the finished turn detail a completion notification needs', () => {
+    // Why: the desktop banner only fires when the done row carries a reply, a tool
+    // name, or a tool input (hasAgentNotificationDetail). A turn that ends with no
+    // assistant prose must therefore still carry its last tool.
+    ingest(state, {
+      event: 'turn_start',
+      session_id: 'session_jc_6',
+      model: 'claude-haiku-4-5',
+      source: 'chat'
+    })
+    ingest(state, {
+      event: 'pre_tool',
+      session_id: 'session_jc_6',
+      tool_name: 'write',
+      tool_input: '{"file_path":"SUMMARY.md","content":"# Summary"}'
+    })
+    const event = ingest(state, {
+      event: 'turn_end',
+      session_id: 'session_jc_6',
+      status: 'ok',
+      duration_ms: '18000'
+    })
+    expect(event?.payload).toMatchObject({ state: 'done', toolName: 'write' })
+  })
+
   it('clears the previous turn tool when a new turn starts', () => {
     ingest(state, {
       event: 'pre_tool',
diff --git a/src/shared/agent-hook-listener/providers/jcode-tool-fields.ts b/src/shared/agent-hook-listener/providers/jcode-tool-fields.ts
index 9220a9741b7..be1e794e95c 100644
--- a/src/shared/agent-hook-listener/providers/jcode-tool-fields.ts
+++ b/src/shared/agent-hook-listener/providers/jcode-tool-fields.ts
@@ -75,19 +75,14 @@ export function extractJcodeToolFields(
     // matching pre_tool preview survive the tool's completion instead of blanking.
     return toolUpdate({ toolName, toolInput: undefined }, { hasToolInputField: false })
   }
-  if (eventName === 'turn_start') {
-    // Why: a new turn starts with no tool; clearing both fields stops the previous
-    // turn's last tool from being shown as this turn's live work.
-    return toolUpdate({ toolName: undefined, toolInput: undefined }, { hasToolInputField: true })
-  }
   if (eventName === 'turn_end') {
+    // Why no tool clearing here: `turn_start` already resets the pane's tool cache
+    // for the next turn, and the completion notification needs the finished turn's
+    // detail (tool or reply) to be worth showing at all — same shape as Claude's Stop.
     const message =
       readString(hookPayload, 'last_assistant_text') ??
       readString(hookPayload, 'last_assistant_message')
-    return {
-      ...(message ? { lastAssistantMessage: message } : { clearLastAssistantMessage: true }),
-      ...toolUpdate({ toolName: undefined, toolInput: undefined }, { hasToolInputField: true })
-    }
+    return message ? { lastAssistantMessage: message } : {}
   }
   return {}
 }