diff --git a/src/test/java/com/runtimematrix/architecture/LayerBoundaryTest.java b/src/test/java/com/runtimematrix/architecture/LayerBoundaryTest.java
new file mode 100644
index 0000000..30e6a84
--- /dev/null
+++ b/src/test/java/com/runtimematrix/architecture/LayerBoundaryTest.java
@@ -0,0 +1,62 @@
+package com.runtimematrix.architecture;
+
+import com.tngtech.archunit.core.domain.JavaClasses;
+import com.tngtech.archunit.core.importer.ClassFileImporter;
+import com.tngtech.archunit.lang.ArchRule;
+import com.tngtech.archunit.library.Architectures.layeredArchitecture;
+import com.tngtech.archunit.library.dependencies.SlicesRuleDefinition;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static com.tngtech.archunit.library.DependencyRules.NO_CLASSES_DEPEND_ON_UPPER_LAYERS;
+
+/** ADR-001 레이어 경계 Arquillian 테스트 */
+@DisplayName("아키텍처 경계 검증")
+class LayerBoundaryTest {
+
+    private JavaClasses classes;
+
+    @BeforeEach
+    void setUp() {
+        classes = new ClassFileImporter().importPackages("com.runtimematrix");
+    }
+
+    @Test
+    @DisplayName("Controller는 Service에만 접근 가능")
+    void controller_should_only_access_service() {
+        ArchRule rule = layeredArchitecture()
+            .layer("Controller").definedBy("..controller..")
+            .layer("Service").definedBy("..service..")
+            .layer("Repository").definedBy("..repository..")
+            .layer("Domain").definedBy("..domain..")
+            .whereLayer("Controller").mayOnlyAccessLayers("Service", "Domain");
+        rule.check(classes);
+    }
+
+    @Test
+    @DisplayName("Service는 Repository와 Domain에만 접근 가능")
+    void service_should_only_access_repository_and_domain() {
+        ArchRule rule = layeredArchitecture()
+            .layer("Controller").definedBy("..controller..")
+            .layer("Service").definedBy("..service..")
+            .layer("Repository").definedBy("..repository..")
+            .layer("Domain").definedBy("..domain..")
+            .whereLayer("Service").mayOnlyAccessLayers("Repository", "Domain");
+        rule.check(classes);
+    }
+
+    @Test
+    @DisplayName("하위 레이어는 상위 레이어에 의존하지 않음")
+    void no_upward_dependencies() {
+        NO_CLASSES_DEPEND_ON_UPPER_LAYERS.check(classes);
+    }
+
+    @Test
+    @DisplayName("패키지 간 순환 의존성 없음")
+    void no_cyclic_dependencies() {
+        ArchRule rule = SlicesRuleDefinition.slices()
+            .matching("com.runtimematrix.(*)..").should().beFreeOfCycles();
+        rule.check(classes);
+    }
+}