fix(chat): harden session auto-title and keep a single no-tool LLM call

- Add session_auto_title prompts, finalize_auto_title (reject prose, truncate, fallback).
- Third-round naming: one model.chat(system, user) with empty tools; reuse executor.model.
- Extend worker title tests for garbage model output.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_oclaw_worker_title.py

@@ -14,8 +14,11 @@ class _DummyResp:
 
 
 class _DummyModel:
+    def __init__(self, content: str = "第三轮标题") -> None:
+        self._content = content
+
     def chat(self, _messages, _tools, on_token=None):  # noqa: ANN001
-        return _DummyResp("第三轮标题")
+        return _DummyResp(self._content)
 
 
 def test_worker_third_round_title_generation_updates_stage3(tmp_path: Path) -> None:
@@ -57,3 +60,45 @@ def test_worker_third_round_title_generation_updates_stage3(tmp_path: Path) -> N
     assert renamed is not None
     assert str(getattr(renamed, "title", "") or "") == "第三轮标题"
     assert str(store.get_setting(f"AIA_SESSION_AUTO_TITLE_STAGE:{sid}") or "") == "3"
+
+
+def test_worker_third_round_rejects_prose_title_uses_fallback(tmp_path: Path) -> None:
+    store = SqliteStore(str(tmp_path / "worker-title-fb.sqlite"))
+    tenant = store.create_tenant("Team")
+    user = store.create_user_account(
+        tenant_id=str(tenant["id"]),
+        username="tester",
+        display_name="Tester",
+        role="owner",
+        password_hash=hashlib.sha256("test-pass".encode("utf-8")).hexdigest(),
+        is_active=True,
+    )
+    session = store.create_session_for_user(
+        title="第一轮标题",
+        tenant_id=str(tenant["id"]),
+        user_id=str(user["id"]),
+    )
+    sid = str(session.id)
+    store.set_setting(f"AIA_SESSION_AUTO_TITLE_STAGE:{sid}", "1")
+    store.add_message(session_id=sid, role="user", content="第一轮问题")
+    store.add_message(session_id=sid, role="assistant", content="第一轮回答")
+    store.add_message(session_id=sid, role="user", content="第二轮问题")
+    store.add_message(session_id=sid, role="assistant", content="第二轮回答")
+
+    msg = StandardMessage(
+        session_id=sid,
+        tenant_id=str(tenant["id"]),
+        user_id=str(user["id"]),
+        role="member",
+        channel="admin_chat",
+        text="第三轮问题",
+        attachments=[],
+        metadata={"lang": "zh"},
+    )
+    garbage = "您好！我是 Claude Code，一个软件工程助手。" + "x" * 80
+    _maybe_generate_title_on_third_round(store=store, msg=msg, model=_DummyModel(content=garbage))
+
+    renamed = store.get_session(sid)
+    assert renamed is not None
+    assert str(getattr(renamed, "title", "") or "") == "第一轮问题"
+    assert str(store.get_setting(f"AIA_SESSION_AUTO_TITLE_STAGE:{sid}") or "") == "3"

tests/test_session_auto_title.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from oclaw.runtime.session_auto_title import AUTO_TITLE_CHAR_MAX, finalize_auto_title, should_reject_auto_title
+
+
+def test_should_reject_long_prose() -> None:
+    blob = "您好！我是 Claude Code，一个软件工程助手。" + "x" * 80
+    assert should_reject_auto_title(blob) is True
+
+
+def test_should_reject_claude_code_intro() -> None:
+    assert should_reject_auto_title("Hello! I am Claude Code, a software engineering assistant.") is True
+
+
+def test_should_accept_short_title() -> None:
+    assert should_reject_auto_title("告警查询配置") is False
+
+
+def test_finalize_truncates_fallback() -> None:
+    long_fb = "一二三四五六七八九十11121314151617181920"
+    out = finalize_auto_title(raw="x" * 100, fallback=long_fb)
+    assert len(out) == AUTO_TITLE_CHAR_MAX
+    assert out == long_fb[:AUTO_TITLE_CHAR_MAX]
+
+
+def test_finalize_uses_model_when_sane() -> None:
+    assert finalize_auto_title(raw="  网管同步  ", fallback="fallback") == "网管同步"