refactor: migrate agent task query ownership

app/db/models/agenttask.py

@@ -4,7 +4,32 @@ from sqlalchemy import Boolean, Index, Integer, String, Text, select, update
 from sqlalchemy.orm import Mapped, Session, mapped_column
 
 from app.db.base import Base, execute_dml, get_id_column
-from app.db.decorators import db_query
+
+
+def _get_for_user_statement(
+        model: type["AgentTask"],
+        task_id: int,
+        user_id: Optional[str] = None,
+):
+    """构造按任务 ID 与可选用户归属收窄的查询语句。"""
+    statement = select(model).where(model.id == task_id)
+    if user_id is not None:
+        statement = statement.where(model.user_id == user_id)
+    return statement
+
+
+def _list_for_user_statement(
+        model: type["AgentTask"],
+        user_id: Optional[str] = None,
+        enabled: Optional[bool] = None,
+):
+    """构造按用户、启用状态和创建时间排序的任务列表语句。"""
+    statement = select(model)
+    if user_id is not None:
+        statement = statement.where(model.user_id == user_id)
+    if enabled is not None:
+        statement = statement.where(model.enabled.is_(enabled))
+    return statement.order_by(model.created_at.desc(), model.id.desc())
 
 
 class AgentTask(Base):
@@ -59,7 +84,6 @@ class AgentTask(Base):
         return task.id
 
     @classmethod
-    @db_query
     def get_for_user(
             cls,
             db: Session,
@@ -69,13 +93,11 @@ class AgentTask(Base):
         """
         按任务 ID 和可选用户 ID 查询 Agent 定时任务。
         """
-        statement = select(cls).where(cls.id == task_id)
-        if user_id is not None:
-            statement = statement.where(cls.user_id == user_id)
-        return db.execute(statement).scalars().first()
+        return db.execute(
+            _get_for_user_statement(cls, task_id=task_id, user_id=user_id)
+        ).scalars().first()
 
     @classmethod
-    @db_query
     def list_for_user(
             cls,
             db: Session,
@@ -85,13 +107,8 @@ class AgentTask(Base):
         """
         按用户和启用状态查询 Agent 定时任务。
         """
-        statement = select(cls)
-        if user_id is not None:
-            statement = statement.where(cls.user_id == user_id)
-        if enabled is not None:
-            statement = statement.where(cls.enabled.is_(enabled))
         return list(db.execute(
-            statement.order_by(cls.created_at.desc(), cls.id.desc())
+            _list_for_user_statement(cls, user_id=user_id, enabled=enabled)
         ).scalars().all())
 
     @classmethod

app/db/oper/agenttask.py

@@ -4,9 +4,16 @@ from datetime import datetime
 from typing import Optional
 from uuid import uuid4
 
+from sqlalchemy.orm import Session
+
 from app.db.base import DbOper
-from app.db.models.agenttask import AgentTask
+from app.db.models.agenttask import (
+    AgentTask,
+    _get_for_user_statement,
+    _list_for_user_statement,
+)
 from app.db.models.agenttaskrun import AgentTaskRun
+from app.db.uow import run_sync_transaction
 
 
 class AgentTaskOper(DbOper):
@@ -45,7 +52,19 @@ class AgentTaskOper(DbOper):
         """
         查询单个 Agent 定时任务。
         """
-        return AgentTask.get_for_user(self._db, task_id=task_id, user_id=user_id)
+        def query(session: Session) -> Optional[AgentTask]:
+            """在调用方会话中读取单个任务。"""
+            return session.execute(
+                _get_for_user_statement(
+                    AgentTask,
+                    task_id=task_id,
+                    user_id=user_id,
+                )
+            ).scalars().first()
+
+        if isinstance(self._db, Session):
+            return query(self._db)
+        return run_sync_transaction(query)
 
     def list(
             self,
@@ -55,7 +74,19 @@ class AgentTaskOper(DbOper):
         """
         查询 Agent 定时任务列表。
         """
-        return AgentTask.list_for_user(self._db, user_id=user_id, enabled=enabled)
+        def query(session: Session) -> list[AgentTask]:
+            """在调用方会话中读取任务列表。"""
+            return list(session.execute(
+                _list_for_user_statement(
+                    AgentTask,
+                    user_id=user_id,
+                    enabled=enabled,
+                )
+            ).scalars().all())
+
+        if isinstance(self._db, Session):
+            return query(self._db)
+        return run_sync_transaction(query)
 
     def update(
             self,

docs/refactor/backend-architecture-next-stage.md

@@ -426,8 +426,12 @@ flowchart TB
   回调交给 Command；commit/flush 失败回滚，事件或上报失败只传播原异常，不回滚已提交记录。
 - 同步/异步 `SubscribeChain.add` 方法长度从各 203 行降至 183/186 行；新增 9 个事务边界测试，
   覆盖成功顺序、commit/flush 失败、重复请求、Oper 不提交、事件失败、上报失败与真实落库。
-- Model 装饰器总数仍为 178：本切片绕开了继承自 `Base.create/async_create` 的自动提交，
-  但为保留既有 Model/旧 SDK 查询兼容未机械删除查询装饰器；ratchet 保持不增，后续切片继续下降。
+- Model 查询装饰器此前为 123 个：本切片绕开了继承自 `Base.create/async_create` 的自动提交，
+  并继续保留既有 Model/旧 SDK 查询兼容；本次 AgentTask 切片将查询装饰器减少到 121 个。
+  2026-08-23 已完成 AgentTask 查询切片：`AgentTaskOper.get/list` 直接在调用方 Session 中执行查询，
+  `AgentTask.get_for_user/list_for_user` 保留原签名和返回语义供旧调用方使用，但不再持有查询装饰器；
+  无 Session 的旧 Oper 入口继续由组合根兼容事务执行器承接。查询装饰器低水位由 123 降至 121，
+  归属过滤、启用状态过滤和创建时间/主键稳定排序由 canonical Oper 测试覆盖。
 
 #### ARCH-222：按风险迁移其余写用例
 
@@ -1191,7 +1195,7 @@ rollback:
 | 基线写入行为 | 默认命令可能覆盖 fixture | 所有默认/check 命令保证工作树不变；write 必须显式 scope |
 | 全功能 worker | 配置允许 >1，控制面会复制 | 启动期明确拒绝 >1；文档与配置一致 |
 | 健康接口 | 认证 `/system/ping` 为主 | 分离公开 live 与受限/安全 ready；失败原因可诊断 |
-| Model 事务装饰器 | 当前 123 个且全部只读；写装饰器 0 | 查询债务只降不增；写事务不回退到 Model/Base 隐式提交 |
+| Model 事务装饰器 | 当前 121 个且全部只读；写装饰器 0 | 查询债务只降不增；写事务不回退到 Model/Base 隐式提交 |
 | 新写用例事务 | 宿主写 Oper 已脱离 Base 隐式提交 | 100% 由入口/Application 边界拥有 Session/UoW |
 | 高频 Module 契约 | 212 个宿主能力显式登记 | 新观察到的宿主方法必须同步登记完整契约 |
 | Event payload | 53 类型全部登记 typed payload 与可靠性 | 新事件必须同步登记，不回退裸 dict |

docs/rules/10-data-and-persistent.md

@@ -84,7 +84,7 @@ Oper classes accept and return persistence values. Turning a `MediaInfo` or
 ### Transaction ownership ratchet
 
 - `tests/fixtures/architecture/transaction-debt-baseline.json` records the
-  existing Model transaction decorators. The current 123 decorators are query-only
+  existing Model transaction decorators. The current 121 decorators are query-only
   migration debt: they may decrease but must never increase or move to a new
   Model method. Both `db_update` and `async_db_update` must remain at zero.
 - New Model methods must not use `db_query`, `db_update`, `async_db_query`, or

tests/fixtures/architecture/transaction-debt-baseline.json

@@ -3,10 +3,10 @@
     "by_kind": {
       "async_db_query": 49,
       "async_db_update": 0,
-      "db_query": 74,
+      "db_query": 72,
       "db_update": 0
     },
-    "count": 123,
+    "count": 121,
     "methods": [
       {
         "decorator": "async_db_query",
@@ -28,16 +28,6 @@
         "file": "app/db/models/agentchat.py",
         "method": "AgentChat.list_by_page"
       },
-      {
-        "decorator": "db_query",
-        "file": "app/db/models/agenttask.py",
-        "method": "AgentTask.get_for_user"
-      },
-      {
-        "decorator": "db_query",
-        "file": "app/db/models/agenttask.py",
-        "method": "AgentTask.list_for_user"
-      },
       {
         "decorator": "db_query",
         "file": "app/db/models/agenttaskrun.py",

tests/test_db_plugin_message_agent_queries.py

@@ -13,6 +13,7 @@ from app.db.models.agenttask import AgentTask
 from app.db.models.downloadfailure import DownloadFailure
 from app.db.models.message import Message
 from app.db.models.plugindata import PluginData
+from app.db.oper.agenttask import AgentTaskOper
 
 
 @pytest.fixture(autouse=True)
@@ -307,6 +308,23 @@ def test_agenttask_get_for_user_enforces_ownership(db):
     assert AgentTask.get_for_user(db.session, task_id, user_id="bob") is None
 
 
+def test_agenttask_oper_reads_with_explicit_session(db, monkeypatch):
+    """AgentTaskOper 的宿主查询使用调用方 Session，不再经过旧事务兼容执行器。"""
+    task_id = AgentTask.add_task(db.session, **_task("canonical", user_id="alice"))
+
+    monkeypatch.setattr(
+        "app.db.oper.agenttask.run_sync_transaction",
+        lambda _query: pytest.fail("显式 Session 查询不应创建兼容事务"),
+    )
+
+    oper = AgentTaskOper(db.session)
+    task = oper.get(task_id, user_id="alice")
+    tasks = oper.list(user_id="alice", enabled=True)
+
+    assert task is not None and task.id == task_id
+    assert [item.id for item in tasks] == [task_id]
+
+
 def test_agenttask_list_for_user_filters_by_owner_and_enabled(db):
     """
     列表按归属与启用状态收窄，并按创建时间倒序。