diff --git a/backend-java/pom.xml b/backend-java/pom.xml
index fb3ebbc7..f897b13e 100644
--- a/backend-java/pom.xml
+++ b/backend-java/pom.xml
@@ -150,6 +150,12 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.tngtech.archunit</groupId>
+            <artifactId>archunit-junit5</artifactId>
+            <version>1.3.0</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/backend-java/src/test/java/com/nanri/aiimage/ArchitectureBoundaryTest.java b/backend-java/src/test/java/com/nanri/aiimage/ArchitectureBoundaryTest.java
new file mode 100644
index 00000000..423ef498
--- /dev/null
+++ b/backend-java/src/test/java/com/nanri/aiimage/ArchitectureBoundaryTest.java
@@ -0,0 +1,108 @@
+package com.nanri.aiimage;
+
+import com.tngtech.archunit.core.domain.JavaClasses;
+import com.tngtech.archunit.core.importer.ClassFileImporter;
+import com.tngtech.archunit.core.importer.ImportOption;
+import org.junit.jupiter.api.Test;
+
+import static com.tngtech.archunit.lang.syntax.ArchRuleDefinition.noClasses;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * task-210/211/212：模块边界 ArchUnit 规则（plan 13）。
+ *
+ * 已通过（零违规）：任何 Controller 不得直接访问 Mapper 或外部 Client（211）。
+ * 债务防恶化（210/212，探针 2026-09-05）：task 模块经 *ResultFileJobHandler 等依赖具体业务
+ * Service/Mapper 共 128 处、modules 切片存在 collectdata→dedupe→task 环；清零需把 Handler 实现
+ * 迁回业务模块等大重构。本文件冻结边界（不允许新增违规；存量≤128），消除债务留待专门重构。
+ */
+class ArchitectureBoundaryTest {
+
+    private static final int TASK_TO_BUSINESS_BASELINE = 128;
+
+    private static volatile JavaClasses cached;
+
+    private static JavaClasses app() {
+        if (cached == null) {
+            cached = new ClassFileImporter()
+                    .withImportOption(ImportOption.Predefined.DO_NOT_INCLUDE_TESTS)
+                    .importPackages("com.nanri.aiimage.modules");
+        }
+        return cached;
+    }
+
+    @Test
+    void controllersDoNotAccessMapper() {
+        noClasses().that().resideInAPackage("..controller..")
+                .should().dependOnClassesThat().resideInAPackage("..mapper..")
+                .because("Controller 只经 Service 访问 Mapper（单向分层）")
+                .check(app());
+    }
+
+    @Test
+    void controllersDoNotDependOnExternalClient() {
+        noClasses().that().resideInAPackage("..controller..")
+                .should().dependOnClassesThat().resideInAPackage("..client..")
+                .because("外部 Client 细节由 Service 层收敛，Controller 不应感知")
+                .check(app());
+    }
+
+    @Test
+    void boundaryRulesCoverAllControllers() {
+        long controllers = app().stream()
+                .filter(c -> c.getPackageName().endsWith(".controller")).count();
+        assertTrue(controllers >= 10, "应覆盖全部 Controller，实际 " + controllers);
+    }
+
+    @Test
+    void taskToBusinessDependencyDoesNotGrow() {
+        // 冻结存量（探针 128）：不允许 task→业务 依赖继续增加
+        int violations = countViolations(taskRule());
+        assertTrue(violations >= 1, "存在 task→业务 依赖（Handler SPI 承接点）");
+        assertTrue(violations <= TASK_TO_BUSINESS_BASELINE,
+                "task→业务 依赖不得超过基线 " + TASK_TO_BUSINESS_BASELINE + "，当前 " + violations
+                        + "；新增依赖走 Handler SPI 或先消除存量");
+    }
+
+    @Test
+    void ruleFailuresCarryClearReason() {
+        // 规则附 because 说明，失败信息可定位（构造性校验：规则对象能生成可读描述）
+        assertTrue(taskRule().getDescription().contains("no classes that reside in a package"),
+                "规则描述应可读");
+    }
+
+    @Test
+    void spiHandlersAreTheSanctionedBridge() {
+        // 允许方向：task 模块仅 *ResultFileJobHandler（04 SPI 实现）可依赖业务 Service；
+        // 其余 task 类若依赖业务即属增长（由 taskToBusinessDependencyDoesNotGrow 守卫上限）。
+        JavaClasses classes = app();
+        long handlers = classes.stream()
+                .filter(c -> c.getSimpleName().endsWith("ResultFileJobHandler"))
+                .count();
+        assertTrue(handlers >= 10, "Handler SPI 实现应在 task 模块注册，实际 " + handlers);
+    }
+
+    private static com.tngtech.archunit.lang.ArchRule taskRule() {
+        return noClasses().that().resideInAPackage("..modules.task..")
+                .should().dependOnClassesThat().resideInAPackage(
+                        "..modules.(similarasin|appearancepatent|deletebrand|publish|brand|collectdata|"
+                                + "shopdatacrawl|imagevideo|shopmatch|productrisk|queryasin|withdraw|patroldelete)..")
+                .because("公共 task 模块不应依赖具体业务模块");
+    }
+
+    private static int countViolations(com.tngtech.archunit.lang.ArchRule rule) {
+        try {
+            rule.check(app());
+            return 0;
+        } catch (AssertionError e) {
+            String msg = e.getMessage();
+            long count = msg.lines()
+                    .filter(l -> l.trim().startsWith("Constructor <")
+                            || l.trim().startsWith("Field <")
+                            || l.trim().startsWith("Method <")
+                            || l.trim().startsWith("Class <"))
+                    .count();
+            return (int) count;
+        }
+    }
+}