diff --git a/src/module/cssheader.php b/src/module/cssheader.php
new file mode 100644
index 0000000..c660168
--- /dev/null
+++ b/src/module/cssheader.php
@@ -0,0 +1,274 @@
+<?php
+/**
+ * @brief improve, a plugin for Dotclear 2
+ *
+ * @package Dotclear
+ * @subpackage Plugin
+ *
+ * @author Jean-Christian Denis and contributors
+ *
+ * @copyright Jean-Christian Denis
+ * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
+ */
+declare(strict_types=1);
+
+namespace Dotclear\Plugin\improve\Module;
+
+/* dotclear */
+use dcCore;
+
+/* improve */
+use Dotclear\Plugin\improve\Action;
+
+/* clearbricks */
+use form;
+use html;
+
+/* php */
+use Dotclear\Exception;
+
+/**
+ * Improve action module php header
+ */
+class cssheader extends Action
+{
+    /** @var string Exemple of header */
+    private static $exemple = <<<EOF
+        @brief %module_id%, a %module_type% for Dotclear 2
+
+        @package Dotclear
+        @subpackage \u%module_type%
+
+        @author %module_author%
+
+        @copyright %user_cn%
+        @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
+        EOF;
+
+    /** @var array<string> Allowed bloc replacement */
+    private $bloc_wildcards = [
+        '%year%',
+        '%module_id%',
+        '%module_name%',
+        '%module_author%',
+        '%module_type%',
+        '%user_cn%',
+        '%user_name%',
+        '%user_email%',
+        '%user_url%',
+    ];
+
+    /** @var array Allowed action for header */
+    private $action_bloc = [];
+
+    /** @var string Parsed bloc */
+    private $bloc = '';
+
+    /** @var boolean Stop parsing files */
+    private $stop_scan = false;
+
+    /** @var string Settings bloc content */
+    private $bloc_content = '';
+
+    protected function init(): bool
+    {
+        $this->setProperties([
+            'id'           => 'cssheader',
+            'name'         => __('CSS header'),
+            'description'  => __('Add or remove phpdoc header bloc from css file'),
+            'priority'     => 340,
+            'configurator' => true,
+            'types'        => ['plugin', 'theme'],
+        ]);
+
+        $this->action_bloc = [
+            __('Do nothing')                       => 0,
+            __('Add bloc if it does not exist')    => 'create',
+            __('Add and overwrite bloc')           => 'overwrite',
+            __('Overwrite bloc only if it exists') => 'replace',
+            __('Remove existing bloc header')      => 'remove',
+        ];
+
+        $bloc_content       = $this->getSetting('bloc_content');
+        $this->bloc_content = is_string($bloc_content) ? $bloc_content : '';
+
+        return true;
+    }
+
+    public function isConfigured(): bool
+    {
+        return !empty($this->getSetting('bloc_action'));
+    }
+
+    public function configure($url): ?string
+    {
+        if (!empty($_POST['save'])) {
+            $this->setSettings([
+                'bloc_action'       => !empty($_POST['bloc_action']) ? $_POST['bloc_action'] : '',
+                'bloc_content'      => !empty($_POST['bloc_content']) ? $_POST['bloc_content'] : '',
+                'exclude_locales'   => !empty($_POST['exclude_locales']),
+                'exclude_templates' => !empty($_POST['exclude_templates']),
+            ]);
+            $this->redirect($url);
+        }
+
+        return '
+        <p class="warning">' . __('This feature is experimental and not tested yet.') . '</p>
+
+        <p><label for="bloc_action">' . __('Action:') . '</label>' .
+        form::combo('bloc_action', $this->action_bloc, $this->getSetting('bloc_action')) . '
+        </p>
+
+        <p><label class="classic" for="exclude_locales">' .
+        form::checkbox('exclude_locales', 1, $this->getSetting('exclude_locales')) . ' ' .
+        __('Do not add bloc to files from "locales" and "libs" folder') .
+        '</label></p>
+
+        <p><label class="classic" for="exclude_templates">' .
+        form::checkbox('exclude_templates', 1, $this->getSetting('exclude_templates')) . ' ' .
+        __('Do not add bloc to files from "tpl" and "default-templates" folder') .
+        '</label></p>
+
+        <p>' . __('Bloc content:') . '</p>
+        <p class="area">' .
+        form::textarea('bloc_content', 50, 10, html::escapeHTML($this->bloc_content)) . '
+        </p><p class="form-note">' .
+        sprintf(
+            __('You can use wildcards %s'),
+            '%year%, %module_id%, %module_name%, %module_author%, %module_type%, %user_cn%, %user_name%, %user_email%, %user_url%'
+        ) . '<br />' . __('Do not put structural elements to the begining of lines.') . '</p>' .
+        '<div class="fieldset box"><h4>' . __('Exemple') . '</h4><pre class="code">' . self::$exemple . '</pre></div>';
+    }
+
+    public function openModule(): ?bool
+    {
+        $bloc = trim($this->bloc_content);
+
+        if (empty($bloc)) {
+            $this->setWarning(__('bloc is empty'));
+
+            return null;
+        }
+
+        $bloc = trim(str_replace("\r\n", "\n", $bloc));
+
+        try {
+            $this->bloc = (string) preg_replace_callback(
+                // use \u in bloc content for first_upper_case
+                '/(\\\u([a-z]{1}))/',
+                function ($str) {
+                    return ucfirst($str[2]);
+                },
+                str_replace(
+                    $this->bloc_wildcards,
+                    [
+                        date('Y'),
+                        $this->module['id'],
+                        $this->module['name'],
+                        $this->module['author'],
+                        $this->module['type'],
+                        dcCore::app()->auth->getInfo('user_cn'),
+                        dcCore::app()->auth->getinfo('user_name'),
+                        dcCore::app()->auth->getInfo('user_email'),
+                        dcCore::app()->auth->getInfo('user_url'),
+                    ],
+                    (string) $bloc
+                )
+            );
+            $this->setSuccess(__('Prepare header info'));
+
+            return null;
+        } catch (Exception $e) {
+            $this->setError(__('Failed to parse bloc'));
+
+            return null;
+        }
+    }
+
+    public function openDirectory(): ?bool
+    {
+        $skipped         = $this->stop_scan;
+        $this->stop_scan = false;
+        if (!empty($this->getSetting('exclude_locales'))   && preg_match('/\/(locales|libs)(\/.*?|)$/', $this->path_full)
+         || !empty($this->getSetting('exclude_templates')) && preg_match('/\/(tpl|default-templates)(\/.*?|)$/', $this->path_full)
+        ) {
+            if (!$skipped) {
+                $this->setSuccess(__('Skip directory'));
+            }
+            $this->stop_scan = true;
+        }
+
+        return null;
+    }
+
+    public function readFile(&$content): ?bool
+    {
+        if ($this->stop_scan || $this->path_extension != 'css' || $this->hasError()) {
+            return null;
+        }
+        if (empty($this->getSetting('bloc_action'))) {
+            return null;
+        }
+        $clean = $this->deleteDocBloc($content);
+        if ($this->getSetting('bloc_action') == 'remove') {
+            $content = $clean;
+
+            return null;
+        }
+        if ($content != $clean && $this->getSetting('bloc_action') == 'create') {
+            return null;
+        }
+        if ($content == $clean && $this->getSetting('bloc_action') == 'replace') {
+            return null;
+        }
+
+        $content = $this->writeDocBloc($clean);
+
+        return true;
+    }
+
+    /**
+     * Write bloc content in file content
+     *
+     * @param  string $content Old content
+     * @return string          New content
+     */
+    private function writeDocBloc(string $content): string
+    {
+        $res = preg_replace(
+            '/^(\/\*\*\n \*[\s|\n|\r\n]+)/',
+            "/**\n * " . str_replace("\n", "\n * ", trim($this->bloc)) . "\n */\n",
+            $content,
+            1,
+            $count
+        );
+        if ($count && $res) {
+            $res = str_replace("\n * \n", "\n *\n", $res);
+            $this->setSuccess(__('Write new doc bloc content'));
+        }
+
+        return (string) $res;
+    }
+
+    /**
+     * Delete bloc content in file content
+     *
+     * @param  string $content Old content
+     * @return string          New content
+     */
+    private function deleteDocBloc(string $content): string
+    {
+        $res = preg_replace(
+            '/^(\*[\n|\r\n]{0,1}\s\*\/\*\*.*?\s\*\*\/\s\*[\n|\r\n]+)/msi',
+            '',
+            $content,
+            -1,
+            $count
+        );
+        if ($count) {
+            $this->setSuccess(__('Delete old doc bloc content'));
+        }
+
+        return (string) $res;
+    }
+}