diff --git a/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php b/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php
index ceaa403933..d8891093fb 100644
--- a/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php
+++ b/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php
@@ -50,6 +50,13 @@ class AddPlugin extends AbstractPluginCommand
         $this->container['filesystem']->mirror($temporaryDir, $targetDir);
         $output->writeln(" <comment>OK</comment>");
 
+        $output->write("Copying public files <info>".$manifest->getName()."</info>...");
+        $this->container['filesystem']->mirror(
+            $targetDir . DIRECTORY_SEPARATOR . 'public',
+            $this->container['root.path'] . DIRECTORY_SEPARATOR . 'www' . DIRECTORY_SEPARATOR . 'plugins' . DIRECTORY_SEPARATOR . $manifest->getName()
+        );
+        $output->writeln(" <comment>OK</comment>");
+
         $output->write("Removing temporary directory...");
         $this->container['filesystem']->remove($temporaryDir);
         $output->writeln(" <comment>OK</comment>");
diff --git a/lib/Alchemy/Phrasea/Plugin/Schema/PluginValidator.php b/lib/Alchemy/Phrasea/Plugin/Schema/PluginValidator.php
index 0b0cadbdde..416b09d2aa 100644
--- a/lib/Alchemy/Phrasea/Plugin/Schema/PluginValidator.php
+++ b/lib/Alchemy/Phrasea/Plugin/Schema/PluginValidator.php
@@ -29,6 +29,7 @@ class PluginValidator
     {
         $this->ensureComposer($directory);
         $this->ensureManifest($directory);
+        $this->ensureDir($directory . DIRECTORY_SEPARATOR . 'public');
 
         $manifest = $directory . DIRECTORY_SEPARATOR . 'manifest.json';
         $data = @json_decode(@file_get_contents($manifest));
@@ -58,6 +59,13 @@ class PluginValidator
         $this->ensureFile($composer);
     }
 
+    private function ensureDir($dir)
+    {
+        if (!file_exists($dir) || !is_dir($dir) || !is_readable($dir)) {
+            throw new PluginValidationException(sprintf('Missing mandatory directory %s', $dir));
+        }
+    }
+
     private function ensureFile($file)
     {
         if (!file_exists($file) || !is_file($file) || !is_readable($file)) {
diff --git a/tests/Alchemy/Tests/Phrasea/Command/Plugin/AddPluginTest.php b/tests/Alchemy/Tests/Phrasea/Command/Plugin/AddPluginTest.php
index f5949dc939..b3816695b3 100644
--- a/tests/Alchemy/Tests/Phrasea/Command/Plugin/AddPluginTest.php
+++ b/tests/Alchemy/Tests/Phrasea/Command/Plugin/AddPluginTest.php
@@ -62,6 +62,10 @@ class AddPluginTest extends PluginCommandTestCase
             ->with('tempdir', self::$DI['app']['plugins.directory'].'/TestPlugin');
 
         self::$DI['app']['filesystem']->expects($this->at(1))
+            ->method('mirror')
+            ->with(self::$DI['app']['plugins.directory'].'/TestPlugin/public', self::$DI['app']['root.path'].'/www/plugins/TestPlugin');
+
+        self::$DI['app']['filesystem']->expects($this->at(2))
             ->method('remove')
             ->with('tempdir');
 
diff --git a/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/PluginDir/TestPlugin/public/.placeholder b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/PluginDir/TestPlugin/public/.placeholder
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/PluginDirInstalled/TestPlugin/public/.placeholder b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/PluginDirInstalled/TestPlugin/public/.placeholder
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginInvalidManifest/public/.placeholder b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginInvalidManifest/public/.placeholder
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginMissingComposer/public/.placeholder b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginMissingComposer/public/.placeholder
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginMissingManifest/public/.placeholder b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginMissingManifest/public/.placeholder
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginNoPublicDirectory/composer.json b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginNoPublicDirectory/composer.json
new file mode 100644
index 0000000000..9e71751641
--- /dev/null
+++ b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginNoPublicDirectory/composer.json
@@ -0,0 +1,10 @@
+{
+    "name" : "test/test",
+    "description" : "test file",
+    "license" : "MIT",
+    "autoload": {
+        "psr-0": {
+            "Vendor" : "src"
+        }
+    }
+}
diff --git a/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginNoPublicDirectory/manifest.json b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginNoPublicDirectory/manifest.json
new file mode 100644
index 0000000000..c732805a54
--- /dev/null
+++ b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginNoPublicDirectory/manifest.json
@@ -0,0 +1,25 @@
+{
+    "name": "TestPlugin",
+    "description" : "A custom class connector",
+    "keywords"    : ["connector"],
+    "authors" : [
+        {
+            "name"     : "Author name",
+            "homepage" : "http://example.com",
+            "email"    : "email@example.com"
+        }
+    ],
+    "homepage" : "http://example.com/project/example",
+    "license"     : "MIT",
+    "version"     : "0.1",
+    "minimum-phraseanet-version": "3.8",
+    "maximum-phraseanet-version": "3.9",
+    "services" : [
+        {
+            "class": "Vendor\\PluginService"
+        }
+    ],
+    "extra" : {
+        "property" : "value"
+    }
+}
diff --git a/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginNoPublicDirectory/src/Vendor/PluginService.php b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginNoPublicDirectory/src/Vendor/PluginService.php
new file mode 100644
index 0000000000..19b9dfd44a
--- /dev/null
+++ b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginNoPublicDirectory/src/Vendor/PluginService.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace Vendor;
+
+use Alchemy\Phrasea\Application as PhraseaApplication;
+use Silex\Application;
+use Alchemy\Phrasea\Plugin\PluginProviderInterface;
+
+class PluginService implements PluginProviderInterface
+{
+    public function register(Application $app)
+    {
+        $app['plugin-test'] = 'hello world';
+    }
+
+    public function boot(Application $app)
+    {
+    }
+
+    public static function create(PhraseaApplication $app)
+    {
+        return new static();
+    }
+}
diff --git a/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginWrongManifest/public/.placeholder b/tests/Alchemy/Tests/Phrasea/Plugin/Fixtures/WrongPlugins/TestPluginWrongManifest/public/.placeholder
new file mode 100644
index 0000000000..e69de29bb2