diff --git a/app/application/commands.py b/app/application/commands.py
index 111028601..b5cdf240e 100644
--- a/app/application/commands.py
+++ b/app/application/commands.py
@@ -40,7 +40,8 @@ def get_command_object() -> Any:
 
 def get_commands() -> Dict[str, Any]:
     """返回全部已注册命令。"""
-    return get_command_object().get_commands()
+    commands: dict[str, object] = get_command_object().get_commands()
+    return commands
 
 
 def get_command(name: str) -> Optional[Any]:
@@ -69,7 +70,8 @@ def dispatch_command(
         normalized = f"/{normalized}"
     command_name = normalized.split()[0]
     matched = get_command(command_name)
-    if matched is None:
+    # Command.get 使用空字典表示未注册命令，不能将其报告为执行成功。
+    if not matched:
         available = [f"{name} - {info.get('description', '无描述')}" for name, info in get_commands().items()]
         raise ValueError(f"命令 {command_name} 不存在" + (f"；可用命令: {'; '.join(available)}" if available else ""))
     publish_event(
diff --git a/docs/code-quality.md b/docs/code-quality.md
index 0813003db..b45db38f1 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 99 个文件（98 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 100 个文件（99 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 deb769a09..dbeeb9e46 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 | 372,305 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 | 372,307 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 | 8,824 / 455 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 | 8,823 / 454 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 601b6126b..7d3e20ab3 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -73,6 +73,7 @@ files =
     app/application/security/twofactor.py,
     app/application/security/otp.py,
     app/application/security/token.py,
+    app/application/commands.py,
     app/application/outbox.py,
     app/application/torrent/cache.py,
     app/application/configuration.py,
diff --git a/tests/fixtures/architecture/mypy-baseline.json b/tests/fixtures/architecture/mypy-baseline.json
index 67860ceba..8746946ad 100644
--- a/tests/fixtures/architecture/mypy-baseline.json
+++ b/tests/fixtures/architecture/mypy-baseline.json
@@ -576,9 +576,6 @@
   "app/application/agent.py": {
     "no-any-return": 4
   },
-  "app/application/commands.py": {
-    "no-any-return": 1
-  },
   "app/application/dashboard.py": {
     "operator": 5
   },
diff --git a/tests/test_command_dispatch.py b/tests/test_command_dispatch.py
new file mode 100644
index 000000000..1220327ac
--- /dev/null
+++ b/tests/test_command_dispatch.py
@@ -0,0 +1,59 @@
+"""命令门面与真实注册表的缺省值契约回归。"""
+
+from unittest.mock import Mock
+
+import pytest
+
+from app.application import commands
+from app.command import Command
+from app.schemas.types import EventType, NotificationChannel
+
+
+@pytest.fixture
+def command_registry(monkeypatch):
+    """保留真实注册表查询逻辑，跳过单例初始化和外部服务装配。"""
+    registry = object.__new__(Command)
+    registry._commands = {
+        "/demo": {"description": "示例命令", "pid": "demo-plugin"},
+    }
+    monkeypatch.setattr(commands, "_command_class", lambda: registry)
+    return registry
+
+
+@pytest.mark.parametrize("command", ["/missing", " missing 参数 "])
+def test_missing_command_is_rejected_before_publishing(command_registry, command):
+    """真实注册表用空字典表示缺失，门面应报错且不发送执行事件。"""
+    assert command_registry.get("/missing") == {}
+    publish_event = Mock()
+
+    with pytest.raises(ValueError, match="命令 /missing 不存在.*示例命令"):
+        commands.dispatch_command(command, user_id="1", publish_event=publish_event)
+
+    publish_event.assert_not_called()
+
+
+def test_registered_command_keeps_arguments_and_channel(command_registry):
+    """已注册命令仍传递原参数、用户和渠道，并返回插件描述。"""
+    publish_event = Mock()
+    assert commands.get_commands() is command_registry._commands
+
+    result = commands.dispatch_command(
+        " demo 参数 ",
+        user_id="7",
+        channel=NotificationChannel.Wechat,
+        source="企业微信",
+        publish_event=publish_event,
+    )
+
+    publish_event.assert_called_once_with(
+        EventType.CommandExcute,
+        {
+            "cmd": "/demo 参数",
+            "user": "7",
+            "channel": NotificationChannel.Wechat,
+            "source": "企业微信",
+        },
+    )
+    assert result["command"] == "/demo 参数"
+    assert result["command_desc"] == "示例命令"
+    assert result["plugin_id"] == "demo-plugin"