feat: 增加最小工单依赖规则 (#8)

tests/test_harness_docs.py

@@ -57,6 +57,24 @@ class TaskTemplateTests(unittest.TestCase):
         check_task_template(errors)
         self.assertEqual(errors, [])
 
+    def test_task_template_requires_dependency_fields(self) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            template = root / ".gitea" / "issue_template" / "task.md"
+            template.parent.mkdir(parents=True)
+            template.write_text(
+                "## 文档影响\n"
+                "- [ ] 不影响长期文档，原因：\n"
+                "- [ ] 更新架构与代码地图\n"
+                "- [ ] 更新业务规则与术语\n"
+                "- [ ] 更新常见修改或故障排查\n",
+                encoding="utf-8",
+            )
+            errors: list[str] = []
+            check_task_template(errors, root)
+        self.assertIn("单元任务模板缺少：## 依赖与并行", errors)
+        self.assertIn("单元任务模板缺少：- 前置工单：无 / #编号", errors)
+
 
 class AgentRuleTests(unittest.TestCase):
     def test_agent_efficiency_sections_are_required(self) -> None: