diff --git a/app/db/models/workflow.py b/app/db/models/workflow.py
index 883e5c062..c44b8f5b7 100644
--- a/app/db/models/workflow.py
+++ b/app/db/models/workflow.py
@@ -1,10 +1,10 @@
 from builtins import list as builtin_list
 from datetime import datetime
-from typing import Any, Optional
+from typing import Any, Optional, Self
 
 from sqlalchemy import JSON, Index, Integer, String, and_, or_, select, update
 from sqlalchemy.ext.asyncio import AsyncSession
-from sqlalchemy.orm import Mapped, mapped_column
+from sqlalchemy.orm import Mapped, Session, mapped_column
 
 from app.db.base import Base, get_id_column
 
@@ -55,16 +55,18 @@ class Workflow(Base):
     )
 
     @classmethod
-    def get_enabled_workflows(cls, db):
+    def get_enabled_workflows(cls, db: Session) -> list[Self]:
+        """读取全部未暂停的工作流。"""
         return list(db.execute(select(cls).where(cls.state != 'P')).scalars().all())
 
     @classmethod
-    async def async_get_enabled_workflows(cls, db: AsyncSession):
+    async def async_get_enabled_workflows(cls, db: AsyncSession) -> list[Self]:
+        """异步读取全部未暂停的工作流。"""
         result = await db.execute(select(cls).where(cls.state != 'P'))
         return list(result.scalars().all())
 
     @classmethod
-    def get_timer_triggered_workflows(cls, db):
+    def get_timer_triggered_workflows(cls, db: Session) -> list[Self]:
         """获取定时触发的工作流"""
         return list(db.execute(select(cls).where(
             and_(
@@ -77,7 +79,7 @@ class Workflow(Base):
         )).scalars().all())
 
     @classmethod
-    async def async_get_timer_triggered_workflows(cls, db: AsyncSession):
+    async def async_get_timer_triggered_workflows(cls, db: AsyncSession) -> list[Self]:
         """异步获取定时触发的工作流"""
         result = await db.execute(select(cls).where(
             and_(
@@ -91,7 +93,7 @@ class Workflow(Base):
         return list(result.scalars().all())
 
     @classmethod
-    def get_event_triggered_workflows(cls, db):
+    def get_event_triggered_workflows(cls, db: Session) -> list[Self]:
         """获取事件触发的工作流"""
         return list(db.execute(select(cls).where(
             and_(
@@ -101,7 +103,7 @@ class Workflow(Base):
         )).scalars().all())
 
     @classmethod
-    async def async_get_event_triggered_workflows(cls, db: AsyncSession):
+    async def async_get_event_triggered_workflows(cls, db: AsyncSession) -> list[Self]:
         """异步获取事件触发的工作流"""
         result = await db.execute(select(cls).where(
             and_(
@@ -112,38 +114,45 @@ class Workflow(Base):
         return list(result.scalars().all())
 
     @classmethod
-    def get_by_name(cls, db, name: str):
-        return db.execute(select(cls).where(cls.name == name)).scalars().first()
+    def get_by_name(cls, db: Session, name: str) -> Optional[Self]:
+        """在调用方会话中按名称查询工作流。"""
+        workflow: Optional[Self] = db.execute(select(cls).where(cls.name == name)).scalars().first()
+        return workflow
 
     @classmethod
-    async def async_get_by_name(cls, db: AsyncSession, name: str):
+    async def async_get_by_name(cls, db: AsyncSession, name: str) -> Optional[Self]:
+        """在调用方异步会话中按名称查询工作流。"""
         result = await db.execute(select(cls).where(cls.name == name))
-        return result.scalars().first()
+        workflow: Optional[Self] = result.scalars().first()
+        return workflow
 
     @classmethod
-    def update_state(cls, db, wid: int, state: str):
+    def update_state(cls, db: Session, wid: int, state: str) -> bool:
+        """在调用方事务中暂存指定工作流状态。"""
         db.execute(update(cls).where(cls.id == wid).values(state=state))
         return True
 
     @classmethod
-    async def async_update_state(cls, db: AsyncSession, wid: int, state: str):
+    async def async_update_state(cls, db: AsyncSession, wid: int, state: str) -> bool:
         """在调用方持有的异步事务中暂存工作流状态。"""
         await db.execute(update(cls).where(cls.id == wid).values(state=state))
         return True
 
     @classmethod
-    def start(cls, db, wid: int):
+    def start(cls, db: Session, wid: int) -> bool:
+        """在调用方事务中暂存运行中状态。"""
         db.execute(update(cls).where(cls.id == wid).values(state='R'))
         return True
 
     @classmethod
-    async def async_start(cls, db: AsyncSession, wid: int):
+    async def async_start(cls, db: AsyncSession, wid: int) -> bool:
         """在调用方持有的异步事务中暂存运行中状态。"""
         await db.execute(update(cls).where(cls.id == wid).values(state='R'))
         return True
 
     @classmethod
-    def fail(cls, db, wid: int, result: str):
+    def fail(cls, db: Session, wid: int, result: str) -> bool:
+        """暂存未暂停工作流的失败结果和执行时间。"""
         db.execute(update(cls).where(
             and_(cls.id == wid, cls.state != "P")
         ).values(
@@ -154,7 +163,7 @@ class Workflow(Base):
         return True
 
     @classmethod
-    async def async_fail(cls, db: AsyncSession, wid: int, result: str):
+    async def async_fail(cls, db: AsyncSession, wid: int, result: str) -> bool:
         """在调用方持有的异步事务中暂存失败结果。"""
         await db.execute(update(cls).where(
             and_(cls.id == wid, cls.state != "P")
@@ -166,7 +175,8 @@ class Workflow(Base):
         return True
 
     @classmethod
-    def success(cls, db, wid: int, result: Optional[str] = None):
+    def success(cls, db: Session, wid: int, result: Optional[str] = None) -> bool:
+        """暂存未暂停工作流的成功结果并递增运行次数。"""
         db.execute(update(cls).where(
             and_(cls.id == wid, cls.state != "P")
         ).values(
@@ -178,7 +188,7 @@ class Workflow(Base):
         return True
 
     @classmethod
-    async def async_success(cls, db: AsyncSession, wid: int, result: Optional[str] = None):
+    async def async_success(cls, db: AsyncSession, wid: int, result: Optional[str] = None) -> bool:
         """在调用方持有的异步事务中暂存成功结果。"""
         await db.execute(update(cls).where(
             and_(cls.id == wid, cls.state != "P")
@@ -191,7 +201,8 @@ class Workflow(Base):
         return True
 
     @classmethod
-    def reset(cls, db, wid: int, reset_count: Optional[bool] = False):
+    def reset(cls, db: Session, wid: int, reset_count: Optional[bool] = False) -> bool:
+        """清空执行上下文，可选择同时重置运行次数。"""
         db.execute(update(cls).where(cls.id == wid).values(
             state='W',
             result=None,
@@ -203,7 +214,7 @@ class Workflow(Base):
         return True
 
     @classmethod
-    async def async_reset(cls, db: AsyncSession, wid: int, reset_count: Optional[bool] = False):
+    async def async_reset(cls, db: AsyncSession, wid: int, reset_count: Optional[bool] = False) -> bool:
         """在调用方持有的异步事务中暂存执行状态重置。"""
         await db.execute(update(cls).where(cls.id == wid).values(
             state='W',
@@ -216,8 +227,9 @@ class Workflow(Base):
         return True
 
     @classmethod
-    def update_current_action(cls, db, wid: int, action_id: str, context: dict,
-                              execution_state: Optional[dict] = None):
+    def update_current_action(cls, db: Session, wid: int, action_id: str, context: dict[str, object],
+                              execution_state: Optional[dict[str, object]] = None) -> bool:
+        """去重记录已执行动作并暂存上下文和执行状态。"""
         workflow = db.execute(select(cls).where(cls.id == wid)).scalars().first()
         current_actions = []
         if workflow and workflow.current_action:
@@ -234,8 +246,8 @@ class Workflow(Base):
         return True
 
     @classmethod
-    async def async_update_current_action(cls, db: AsyncSession, wid: int, action_id: str, context: dict,
-                                          execution_state: Optional[dict] = None):
+    async def async_update_current_action(cls, db: AsyncSession, wid: int, action_id: str, context: dict[str, object],
+                                          execution_state: Optional[dict[str, object]] = None) -> bool:
         """在调用方持有的异步事务中暂存动作进度。"""
         # 先获取当前current_action
         result = await db.execute(select(cls.current_action).where(cls.id == wid))
diff --git a/docs/code-quality.md b/docs/code-quality.md
index 67ecd6bc0..3e33c4820 100644
--- a/docs/code-quality.md
+++ b/docs/code-quality.md
@@ -75,7 +75,7 @@ uv run --locked --no-sync python scripts/architecture/complexity.py
 回调和返回值类型；全仓错误计数为零并不保证单独纳入 strict frontier 后也为零。
 
 2026-10-16 开始逐文件清理类型债务，`app/domain/title.py` 通过局部可空类型声明保留
-既有搜索解析行为，并纳入严格清单；当前清单共 127 个文件（126 个生产文件和 1 个脚本）。
+既有搜索解析行为，并纳入严格清单；当前清单共 128 个文件（127 个生产文件和 1 个脚本）。
 每个治理提交聚焦一个生产文件及其必要测试、门禁配置、真实下降基线和指标文档。
 验收同时检查完整严格清单与全宿主 Linux 分析，避免 `follow_imports = skip` 隐藏依赖
 签名冲突；不通过忽略诊断或放宽类型合同接受回退。最新文件清单以 `mypy.ini` 为准，
diff --git a/docs/refactor/optimization-checklist.md b/docs/refactor/optimization-checklist.md
index 1187b6045..5a1aac921 100644
--- a/docs/refactor/optimization-checklist.md
+++ b/docs/refactor/optimization-checklist.md
@@ -106,9 +106,9 @@ ARCH-201 至 ARCH-204 均达到实现、验证、提交、推送和远端门禁
 | Model/Oper 事务债务 | 0 | 自建 Session、自动事务装饰器、直接 commit/rollback 等基线均为零 |
 | Module Contract | 215 specs / 211 methods / 263 calls | 动态方法名为 0；分类事实富化通过显式合同进入插件调度，旧 YAML 分类方法已移除；download 新增 custom_words 可选参数，旧 provider 签名通过显式合同兼容 |
 | Event Contract | 53 | 均已有 payload model，但当前全部是 diagnostic enforcement |
-| Python 源码量 | 372,609 行 | 本次重新扫描物理行数，排除 `app/plugins/**`；74 个文件超过 1,000 行，12 个超过 2,000 行；源码尺寸仅作观察 |
+| Python 源码量 | 372,621 行 | 本次重新扫描物理行数，排除 `app/plugins/**`；74 个文件超过 1,000 行，12 个超过 2,000 行；源码尺寸仅作观察 |
 | 长方法 | 309 个超过 80 行 | 本次 AST 扫描排除 `app/plugins/**`；61 个超过 150 行，17 个超过 250 行；新增函数仍受 C901/嵌套深度门禁约束 |
-| 全量 mypy 历史债务 | 8,702 / 428 文件 | 通知排版补齐 Slack 消息块类型，历史债务减少 2 项；工作流资源过滤改用领域对象调用过滤链，恢复的节点输出在消费前归一化，并收紧可空资源列表的类型低水位；消息媒体交互类型债务已清零，canonical Facade 与 endpoint 类型边界已补齐，低水位只允许继续下降；微信 ClawBot 入站 item_list 媒体解析改为按子项键名分派后，类型错误减少 4 项；站点解析器分享率改用浮点初值，类型错误减少 20 项；本次下载与文件安全修复再减少 3 项；Transmission 进度回退值归一化再减少 2 项，逐文件逐错误码无增长 |
+| 全量 mypy 历史债务 | 8,662 / 427 文件 | 通知排版补齐 Slack 消息块类型，历史债务减少 2 项；工作流资源过滤改用领域对象调用过滤链，恢复的节点输出在消费前归一化，并收紧可空资源列表的类型低水位；消息媒体交互类型债务已清零，canonical Facade 与 endpoint 类型边界已补齐，低水位只允许继续下降；微信 ClawBot 入站 item_list 媒体解析改为按子项键名分派后，类型错误减少 4 项；站点解析器分享率改用浮点初值，类型错误减少 20 项；本次下载与文件安全修复再减少 3 项；Transmission 进度回退值归一化再减少 2 项，逐文件逐错误码无增长 |
 | Ruff 历史诊断 | 98 | 低水位门禁通过，但规则集只覆盖 `E4/E7/E9/F/I` |
 | 覆盖率固定基线 | Application 80.00%，Domain 80.00% | Chain、Runtime、Agent、Adapter、Startup 未进入包级覆盖率门禁 |
 
diff --git a/mypy.ini b/mypy.ini
index 9a1878ec1..fb44771ba 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -119,6 +119,7 @@ files =
     app/db/models/systemconfig.py,
     app/db/models/user.py,
     app/db/models/userconfig.py,
+    app/db/models/workflow.py,
     app/db/uow.py,
     app/startup/initializers/routers.py,
     app/startup/initializers/workflow.py,
diff --git a/tests/fixtures/architecture/mypy-baseline.json b/tests/fixtures/architecture/mypy-baseline.json
index 7b3307f0b..9566bfb52 100644
--- a/tests/fixtures/architecture/mypy-baseline.json
+++ b/tests/fixtures/architecture/mypy-baseline.json
@@ -993,10 +993,6 @@
     "no-untyped-def": 20,
     "type-arg": 1
   },
-  "app/db/models/workflow.py": {
-    "no-untyped-def": 27,
-    "type-arg": 4
-  },
   "app/db/oper/agentchat.py": {
     "type-arg": 6
   },
@@ -1039,8 +1035,6 @@
   },
   "app/db/oper/workflow.py": {
     "arg-type": 1,
-    "no-any-return": 6,
-    "no-untyped-call": 3,
     "no-untyped-def": 1,
     "union-attr": 3
   },