diff --git a/.classpath b/.classpath
index 282ada5..68d13e3 100644
--- a/.classpath
+++ b/.classpath
@@ -13,6 +13,19 @@
 			<attribute name="test" value="true"/>
 		</attributes>
 	</classpathentry>
+	<classpathentry kind="src" output="bin/main" path="src/main/resources">
+		<attributes>
+			<attribute name="gradle_scope" value="main"/>
+			<attribute name="gradle_used_by_scope" value="main,test"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" output="bin/test" path="src/test/resources">
+		<attributes>
+			<attribute name="gradle_scope" value="test"/>
+			<attribute name="gradle_used_by_scope" value="test"/>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21/"/>
 	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
 	<classpathentry kind="output" path="bin/default"/>
diff --git a/src/main/java/conflux/CtxInstance.java b/src/main/java/conflux/CtxInstance.java
index 8791ae3..8e1f355 100644
--- a/src/main/java/conflux/CtxInstance.java
+++ b/src/main/java/conflux/CtxInstance.java
@@ -62,6 +62,16 @@ public final class CtxInstance implements CtxInterface {
     private final Map<String, Class<?>> keyTypes = new ConcurrentHashMap<>();
     private final Map<Key<?>, List<WeakReference<Listener<?>>>> listeners = new ConcurrentHashMap<>();
 
+    /**
+     * Protected no-argument constructor added to satisfy code analysis tools.
+     * <p>
+     * This constructor should not be used directly. It exists solely to comply with
+     * static analysis requirements (e.g., PMD) expecting at least one constructor.
+     */
+    protected CtxInstance() {
+        // Intentionally left blank
+    }
+
     /**
      * Stores or updates the value for a given key. If the key is used for the first
      * time, its type is recorded. If the key has been used before with a different