diff --git a/spring-modulith-apt/src/main/java/org/springframework/modulith/apt/package-info.java b/spring-modulith-apt/src/main/java/org/springframework/modulith/apt/package-info.java
new file mode 100644
index 00000000..32b61973
--- /dev/null
+++ b/spring-modulith-apt/src/main/java/org/springframework/modulith/apt/package-info.java
@@ -0,0 +1,7 @@
+/**
+ * An annotation processor to extract Javadoc from application code for inclusion in generated architecture
+ * documentation.
+ *
+ * @since 1.3
+ */
+package org.springframework.modulith.apt;
diff --git a/spring-modulith-docs/src/main/java/org/springframework/modulith/docs/metadata/package-info.java b/spring-modulith-docs/src/main/java/org/springframework/modulith/docs/metadata/package-info.java
new file mode 100644
index 00000000..eda55503
--- /dev/null
+++ b/spring-modulith-docs/src/main/java/org/springframework/modulith/docs/metadata/package-info.java
@@ -0,0 +1,6 @@
+/**
+ * Method and type documentation metadata.
+ *
+ * @since 1.3
+ */
+package org.springframework.modulith.docs.metadata;
diff --git a/spring-modulith-docs/src/main/java/org/springframework/modulith/docs/util/package-info.java b/spring-modulith-docs/src/main/java/org/springframework/modulith/docs/util/package-info.java
new file mode 100644
index 00000000..1d711870
--- /dev/null
+++ b/spring-modulith-docs/src/main/java/org/springframework/modulith/docs/util/package-info.java
@@ -0,0 +1,6 @@
+/**
+ * General utilities for the context of documentation generation.
+ *
+ * @since 1.3
+ */
+package org.springframework.modulith.docs.util;
diff --git a/spring-modulith-junit/src/main/java/org/springframework/modulith/junit/diff/package-info.java b/spring-modulith-junit/src/main/java/org/springframework/modulith/junit/diff/package-info.java
new file mode 100644
index 00000000..47dedad8
--- /dev/null
+++ b/spring-modulith-junit/src/main/java/org/springframework/modulith/junit/diff/package-info.java
@@ -0,0 +1,6 @@
+/**
+ * Project differences detection implementation.
+ *
+ * @since 1.3
+ */
+package org.springframework.modulith.junit.diff;
diff --git a/spring-modulith-junit/src/main/java/org/springframework/modulith/junit/package-info.java b/spring-modulith-junit/src/main/java/org/springframework/modulith/junit/package-info.java
new file mode 100644
index 00000000..c95e06a1
--- /dev/null
+++ b/spring-modulith-junit/src/main/java/org/springframework/modulith/junit/package-info.java
@@ -0,0 +1,6 @@
+/**
+ * JUnit extension to optimize test case execution depending of the changes made to an application.
+ *
+ * @since 1.3
+ */
+package org.springframework.modulith.junit;