diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 000000000..1260d5803
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,10 @@
+# Check out all text files in UNIX format, with LF as end of line
+# Don't change this file. If you have any ideas about it, please
+# submit a separate issue about it and we'll discuss.
+# Why: - https://github.com/yegor256/qulice/issues/391
+#      - https://docs.github.com/en/get-started/getting-started-with-git/configuring-git-to-handle-line-endings
+
+* text=auto eol=lf
+*.java ident
+*.xml ident
+*.png binary
diff --git a/.github/workflows/pdd.yml b/.github/workflows/pdd.yml
new file mode 100644
index 000000000..25f6357fc
--- /dev/null
+++ b/.github/workflows/pdd.yml
@@ -0,0 +1,15 @@
+---
+name: pdd
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+jobs:
+  pdd:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+      - uses: g4s8/pdd-action@master
diff --git a/src/main/java/org/eolang/jeo/JeoMojo.java b/src/main/java/org/eolang/jeo/JeoMojo.java
index 91a4c7519..6f178fa36 100644
--- a/src/main/java/org/eolang/jeo/JeoMojo.java
+++ b/src/main/java/org/eolang/jeo/JeoMojo.java
@@ -32,6 +32,10 @@
  * Goal which touches a timestamp file.
  *
  * @since 0.1.0
+ * @todo #5:30min Add logging for the plugin entry point.
+ *  The plugin should log the entry point of the plugin. Maybe it should log the
+ *  list of already compiled classes. When it will be done, remove that
+ *  puzzle.
  */
 @Mojo(name = "optimize", defaultPhase = LifecyclePhase.PROCESS_CLASSES)
 public final class JeoMojo extends AbstractMojo {