diff --git a/sideci.yml b/sideci.yml
new file mode 100644
index 0000000..305fc15
--- /dev/null
+++ b/sideci.yml
@@ -0,0 +1,8 @@
+linter:
+  rubocop:
+    root_dir: 'sideci_demo'
+
+  phpmd:
+    root_dir: 'sideci_demo'
+    options:
+      rule: 'phpmd.xml'
diff --git a/sideci_demo/phpmd.xml b/sideci_demo/phpmd.xml
new file mode 100644
index 0000000..b9887c5
--- /dev/null
+++ b/sideci_demo/phpmd.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<ruleset name="SideCI demo rule set">
+  <rule ref="rulesets/cleancode.xml" />
+  <rule ref="rulesets/controversial.xml">
+    <exclude name="CamelCaseClassName"></exclude>
+    <exclude name="CamelCasePropertyName"></exclude>
+    <exclude name="CamelCaseMethodName"></exclude>
+    <exclude name="CamelCaseParameterName"></exclude>
+    <exclude name="CamelCaseVariableName"></exclude>
+  </rule>
+  <rule ref="rulesets/design.xml" />
+  <rule ref="rulesets/naming.xml" />
+  <rule ref="rulesets/unusedcode.xml" />
+</ruleset>
diff --git a/sideci_demo/phpmd_demo.php b/sideci_demo/phpmd_demo.php
new file mode 100644
index 0000000..e135d58
--- /dev/null
+++ b/sideci_demo/phpmd_demo.php
@@ -0,0 +1,51 @@
+<?php
+
+use Github\Client;
+
+class Repository
+{
+    private $owner;
+    private $name;
+    private $public;
+    private $branches;
+
+    const PublicVisibility = 'public';
+
+    /**
+     * @param string $owner
+     * @param string $name
+     * @param string $visibility
+     */
+    public function Repository(string $owner, string $name, string $visibility)
+    {
+        $this->owner = $owner;
+        $this->name = $name;
+        $this->public = $visibility === PublicVisibility;
+        $this->client = new Client($_SERVER['API_TOKEN']);
+    }
+
+    /**
+     * @return string
+     */
+    public function getFullName(): string
+    {
+        return $this->owner . $this->name;
+    }
+
+    /**
+     * @return bool
+     */
+    public function getPublic(): bool
+    {
+        return $this->public;
+    }
+
+    /**
+     * @param string $title
+     * @param string $description
+     */
+    public function createIssue(string $title, string $description)
+    {
+        $this->client->createIssue($this->getFullName, $title, $description);
+    }
+}