diff --git a/.changeset/auto-session-title.md b/.changeset/auto-session-title.md
new file mode 100644
index 000000000..e7715103d
--- /dev/null
+++ b/.changeset/auto-session-title.md
@@ -0,0 +1,5 @@
+---
+"@moonshot-ai/kimi-code": patch
+---
+
+Automatically generate concise session titles after the first turn without overwriting custom titles.
diff --git a/apps/kimi-code/src/tui/controllers/session-event-handler.ts b/apps/kimi-code/src/tui/controllers/session-event-handler.ts
index ff30b5e50..9feb7cf17 100644
--- a/apps/kimi-code/src/tui/controllers/session-event-handler.ts
+++ b/apps/kimi-code/src/tui/controllers/session-event-handler.ts
@@ -393,22 +393,28 @@ export class SessionEventHandler {
   }
 
   /**
-   * Best-effort auto title: while the session has no title yet, ask the
-   * engine to generate one from the first prompts after each completed turn.
-   * The engine keeps custom titles untouched and dedupes in-flight requests;
-   * a resolved `undefined` (no managed login / no prompt yet) just retries on
-   * the next turn, while a rejection (v1 engine, dead RPC) disables further
-   * attempts for this session. The generated title lands through the regular
-   * `session.meta.updated` event.
+   * Best-effort auto title: after each completed turn, ask the engine to
+   * generate a title from the first prompts until one lands. The engine
+   * overwrites the prompt-derived easy title but never a custom title
+   * (enforced server-side), and dedupes in-flight requests. A resolved string
+   * means a title was applied — stop asking so later turns don't regenerate
+   * over it; a resolved `undefined` (no managed login / no prompt yet / a
+   * custom title) just retries on the next turn; a rejection (v1 engine,
+   * dead RPC) disables further attempts for this session. The generated
+   * title lands through the regular `session.meta.updated` event.
    */
   private requestSessionTitleGeneration(): void {
     if (this.titleGenerationDisabled) return;
-    const { sessionId, sessionTitle } = this.host.state.appState;
+    const { sessionId } = this.host.state.appState;
     if (sessionId.length === 0) return;
-    if (typeof sessionTitle === 'string' && sessionTitle.trim().length > 0) return;
-    void this.host.harness.generateSessionTitle({ id: sessionId }).catch(() => {
-      this.titleGenerationDisabled = true;
-    });
+    void this.host.harness.generateSessionTitle({ id: sessionId }).then(
+      (title) => {
+        if (title !== undefined) this.titleGenerationDisabled = true;
+      },
+      () => {
+        this.titleGenerationDisabled = true;
+      },
+    );
   }
 
   private handleStepBegin(event: TurnStepStartedEvent): void {
diff --git a/apps/kimi-code/test/tui/controllers/session-event-handler-title.test.ts b/apps/kimi-code/test/tui/controllers/session-event-handler-title.test.ts
index 7fb56e5ff..c5de0435d 100644
--- a/apps/kimi-code/test/tui/controllers/session-event-handler-title.test.ts
+++ b/apps/kimi-code/test/tui/controllers/session-event-handler-title.test.ts
@@ -84,13 +84,24 @@ describe('session auto title generation', () => {
     expect(harness.generateSessionTitle).toHaveBeenCalledWith({ id: 's1' });
   });
 
-  it('does not request a title when the session already has one', () => {
-    const { host, harness } = makeHost({ sessionTitle: 'custom title' });
+  it('requests a title after a turn ends even when an easy title exists', () => {
+    const { host, harness } = makeHost({ sessionTitle: '首条 prompt 的截断标题' });
     const handler = new SessionEventHandler(host);
 
     handler.handleEvent(turnEndedEvent(), vi.fn());
 
-    expect(harness.generateSessionTitle).not.toHaveBeenCalled();
+    expect(harness.generateSessionTitle).toHaveBeenCalledWith({ id: 's1' });
+  });
+
+  it('stops requesting after a title was generated', async () => {
+    const { host, harness } = makeHost({ generateTitle: async () => '生成的标题' });
+    const handler = new SessionEventHandler(host);
+
+    handler.handleEvent(turnEndedEvent(), vi.fn());
+    await flushMicrotasks();
+    handler.handleEvent(turnEndedEvent(), vi.fn());
+
+    expect(harness.generateSessionTitle).toHaveBeenCalledTimes(1);
   });
 
   it('keeps requesting after an unavailable (undefined) result', async () => {