diff --git a/src/Backend.php b/src/Backend.php
index bb10cc6..8cea70c 100644
--- a/src/Backend.php
+++ b/src/Backend.php
@@ -19,7 +19,6 @@ use dcCore;
 use dcPage;
 use dcFavorites;
 use dcNsProcess;
-use Dotclear\App;
 use Dotclear\Helper\File\Files;
 
 /**
@@ -71,15 +70,23 @@ class Backend extends dcNsProcess
                 );
             },
 
-            // Add actions to improve
-            'improveTaskAdd' => function (Tasks $actions): void {
-                $dir = __DIR__ . DIRECTORY_SEPARATOR . 'Task' . DIRECTORY_SEPARATOR;
-                foreach (Files::scandir($dir) as $file) {
-                    if (str_ends_with($file, '.php') && is_file($dir . $file)) {
-                        $class = __NAMESPACE__ . '\\Task\\' . basename($file, '.php');
-                        $actions->add(new $class());
-                    }
-                }
+            // Add taks to improve
+            'improveTaskAdd' => function (Tasks $tasks): void {
+                $tasks
+                    ->add(new Task\CssHeader())
+                    ->add(new Task\DcDeprecated())
+                    ->add(new Task\DcStore())
+                    ->add(new Task\EndOfFile())
+                    ->add(new Task\GitShields())
+                    ->add(new Task\LicenseFile())
+                    ->add(new Task\NewLine())
+                    ->add(new Task\PhpCsFixer())
+                    ->add(new Task\PhpHeader())
+                    ->add(new Task\PhpStan())
+                    ->add(new Task\Po2Php())
+                    ->add(new Task\Tab())
+                    ->add(new Task\Zip())
+                    ;
             },
         ]);
 
diff --git a/src/Config.php b/src/Config.php
index 9670b91..930684c 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -97,10 +97,10 @@ class Config extends dcNsProcess
         $items    = [];
         $settings = dcCore::app()->blog->settings->get(My::id());
 
-        foreach ($improve->tasks->dump() as $action) {
+        foreach ($improve->tasks->dump() as $task) {
             $items[] = (new Para())->items([
-                (new Checkbox(['disabled[]', 'disabled_' . $action->id()], $action->isDisabled()))->value($action->id()),
-                (new Label($action->id(), Label::OUTSIDE_LABEL_AFTER))->class('classic')->for('disabled_' . $action->id()),
+                (new Checkbox(['disabled[]', 'disabled_' . $task->properties->id], $task->isDisabled()))->value($task->properties->id),
+                (new Label($task->properties->id, Label::OUTSIDE_LABEL_AFTER))->class('classic')->for('disabled_' . $task->properties->id),
             ]);
         }
 
diff --git a/src/Core.php b/src/Core.php
index cfbe946..4b85a2b 100644
--- a/src/Core.php
+++ b/src/Core.php
@@ -14,7 +14,6 @@ declare(strict_types=1);
 
 namespace Dotclear\Plugin\improve;
 
-use ArrayObject;
 use dcCore;
 use dcLog;
 use dcModuleDefine;
@@ -32,9 +31,6 @@ class Core
     /** @var    Tasks   $tasks  The tasks stack instance */
     public readonly Tasks $tasks;
 
-    /** @var    array<int,string>   $disabled   Disabled tasks modules */
-    private $disabled = [];
-
     /** @var    array<string,array>     $logs   Logs by actions modules */
     private $logs = [];
 
@@ -55,8 +51,10 @@ class Core
     protected function __construct()
     {
         $this->tasks = new Tasks();
+
+        // mark some tasks as disabled (by settings)
         $disable = explode(';', (string) dcCore::app()->blog?->settings->get(My::id())->get('disabled'));
-        foreach($disable as $id) {
+        foreach ($disable as $id) {
             $this->tasks->get($id)?->disable();
         }
     }
@@ -153,26 +151,26 @@ class Core
         return $lines;
     }
 
-    public function fixModule(dcModuleDefine $module, array $actions): float
+    public function fixModule(dcModuleDefine $module, array $tasks): float
     {
         $time_start = microtime(true);
 
         $workers = [];
-        foreach ($actions as $action) {
-            if ($this->tasks->get($action)?->isConfigured() 
-                && $this->tasks->get($action)?->isDisabled() === false
+        foreach ($tasks as $id) {
+            if (!$this->tasks->get($id)?->isDisabled()
+                && $this->tasks->get($id)?->isConfigured()
             ) {
-                $workers[] = $this->tasks->get($action);
+                $workers[] = $this->tasks->get($id);
             }
         }
-        foreach ($workers as $action) {
+        foreach ($workers as $task) {
             // trace all path and action in logs
-            $this->logs[My::id()][__('Begin')][] = $action->id();
+            $this->logs[My::id()][__('Begin')][] = $task->properties->id;
             // info: set current module
-            $action->setModule($module);
-            $action->setPath(__('Begin'), '', true);
+            $task->setModule($module);
+            $task->setPath(__('Begin'), '', true);
             // action: open module
-            $action->openModule();
+            $task->openModule();
         }
         if (!$module->get('root_writable') || !is_writable($module->get('root'))) {
             throw new Exception(__('Module path is not writable'));
@@ -182,61 +180,63 @@ class Core
             if (!file_exists($file[0])) {
                 continue;
             }
-            foreach ($workers as $action) {
+            foreach ($workers as $task) {
                 // trace all path and action in logs
-                $this->logs[My::id()][$file[0]][] = $action->id();
+                $this->logs[My::id()][$file[0]][] = $task->properties->id;
                 // info: set current path
-                $action->setPath($file[0], $file[1], $file[2]);
+                $task->setPath($file[0], $file[1], $file[2]);
             }
             if (!$file[2]) {
-                foreach ($workers as $action) {
+                foreach ($workers as $task) {
                     // action: open a directory. full path
-                    $action->openDirectory();
+                    $task->openDirectory();
                 }
             } else {
-                foreach ($workers as $action) {
+                foreach ($workers as $task) {
                     // action: before openning a file. full path, extension
-                    $action->openFile();
+                    $task->openFile();
                 }
                 if (in_array($file[1], self::$readfile_extensions)) {
                     if (false !== ($content = file_get_contents($file[0]))) {
                         $no_content = empty($content);
-                        foreach ($workers as $action) {
+                        foreach ($workers as $task) {
                             // action: read a file content. full path, extension, content
-                            $action->readFile($content);
+                            $task->readFile($content);
                             if (empty($content) && !$no_content) {
                                 throw new Exception(sprintf(
                                     __('File content has been removed: %s by %s'),
                                     $file[0],
-                                    $action->name()
+                                    $task->properties->name
                                 ));
                             }
                         }
                         Files::putContent($file[0], $content);
                     }
-                    foreach ($workers as $action) {
+                    foreach ($workers as $task) {
                         // action: after closing a file. full path, extension
-                        $action->closeFile();
+                        $task->closeFile();
                     }
                 }
             }
         }
-        foreach ($workers as $action) {
+        foreach ($workers as $task) {
             // trace all path and action in logs
-            $this->logs[My::id()][__('End')][] = $action->id();
+            $this->logs[My::id()][__('End')][] = $task->properties->id;
             // info: set current module
-            $action->setPath(__('End'), '', true);
+            $task->setPath(__('End'), '', true);
             // action: close module
-            $action->closeModule();
+            $task->closeModule();
         }
         // info: get acions reports
-        foreach ($workers as $action) {
-            $this->logs[$action->id()] = $action->getLogs();
+        foreach ($workers as $task) {
+            $logs = [];
             foreach ($this->has_log as $type => $v) {
-                if ($action->hasLog($type)) {
+                if (!$task->{$type}->empty()) {
+                    $logs[$type]          = $task->{$type}->dump();
                     $this->has_log[$type] = true;
                 }
             }
+            $this->logs[$task->properties->id] = $logs;
         }
 
         return round(microtime(true) - $time_start, 5);
diff --git a/src/Manage.php b/src/Manage.php
index a32dc01..5c58ca1 100644
--- a/src/Manage.php
+++ b/src/Manage.php
@@ -42,14 +42,14 @@ use Exception;
  */
 class Manage extends dcNsProcess
 {
-    /** @var Core $improve  improve core instance */
-    private static $improve = null;
-    /** @var string $type   Current module(s) type */
-    private static $type = 'plugin';
-    /** @var string $module Current module id */
-    private static $module = '-';
-    /** @var Action|null $action Current action module */
-    private static $action = null;
+    /** @var    string  $type   Current module(s) type */
+    private static string $type = 'plugin';
+
+    /** @var    string  $module     Current module id */
+    private static string $module = '-';
+
+    /** @var    null|Task   $task   Current action module */
+    private static ?Task $task = null;
 
     public static function init(): bool
     {
@@ -61,6 +61,212 @@ class Manage extends dcNsProcess
         return static::$init;
     }
 
+    public static function process(): bool
+    {
+        if (!static::$init) {
+            return false;
+        }
+
+        self::$type   = self::getType();
+        self::$module = self::getModule();
+        self::$task   = self::getTask();
+
+        $log_id = '';
+        $done   = self::setPreferences();
+
+        if (!empty($_POST['fix'])) {
+            if (empty($_POST['actions'])) {
+                dcAdminNotices::addWarningNotice(__('No action selected'));
+            } elseif (self::$module == '-') {
+                dcAdminNotices::addWarningNotice(__('No module selected'));
+            } else {
+                try {
+                    $time = Core::instance()->fixModule(
+                        self::$type == 'plugin' ? dcCore::app()->plugins->getDefine(self::$module) : dcCore::app()->themes->getDefine(self::$module),
+                        $_POST['actions']
+                    );
+                    $log_id = Core::instance()->writeLogs();
+                    dcCore::app()->blog?->triggerBlog();
+
+                    if (Core::instance()->hasLog('error')) {
+                        $notice = ['type' => dcAdminNotices::NOTICE_ERROR, 'msg' => __('Fix of "%s" complete in %s secondes with errors')];
+                    } elseif (Core::instance()->hasLog('warning')) {
+                        $notice = ['type' => dcAdminNotices::NOTICE_WARNING, 'msg' => __('Fix of "%s" complete in %s secondes with warnings')];
+                    } elseif (Core::instance()->hasLog('success')) {
+                        $notice = ['type' => dcAdminNotices::NOTICE_SUCCESS, 'msg' => __('Fix of "%s" complete in %s secondes')];
+                    } else {
+                        $notice = ['type' => dcAdminNotices::NOTICE_SUCCESS, 'msg' => __('Fix of "%s" complete in %s secondes without messages')];
+                    }
+                    dcAdminNotices::addNotice($notice['type'], sprintf($notice['msg'], self::$module, $time));
+
+                    $done = true;
+                } catch (Exception $e) {
+                    dcCore::app()->error->add($e->getMessage());
+                    $done = false;
+                }
+            }
+        }
+
+        if ($done) {
+            dcCore::app()->adminurl?->redirect('admin.plugin.' . My::id(), ['type' => self::$type, 'module' => self::$module, 'upd' => $log_id]);
+        }
+
+        return true;
+    }
+
+    public static function render(): void
+    {
+        if (!static::$init) {
+            return;
+        }
+
+        dcPage::openModule(
+            My::name(),
+            dcPage::jsModuleLoad(My::id() . '/js/index.js') .
+            (self::$task === null ? '' : self::$task->header())
+        );
+
+        echo
+        dcPage::breadcrumb([
+            __('Plugins')                                                                                                                 => '',
+            My::name()                                                                                                                    => '',
+            empty($_REQUEST['config']) ? (self::$type == 'theme' ? __('Themes actions') : __('Plugins actions')) : __('Configure module') => '',
+        ]) .
+        dcPage::notices();
+
+        if (empty($_REQUEST['config'])) {
+            self::displayActions();
+        } else {
+            self::displayConfigurator();
+        }
+
+        dcPage::closeModule();
+    }
+
+    private static function displayConfigurator(): void
+    {
+        $back_url = $_REQUEST['redir'] ?? dcCore::app()->adminurl?->get('admin.plugin.' . My::id(), ['type' => self::$type]);
+
+        if (null === self::$task) {
+            echo '
+            <p class="warning">' . __('Unknow module') . '</p>
+            <p><a class="back" href="' . $back_url . '">' . __('Back') . '</a></p>';
+        } else {
+            $redir = $_REQUEST['redir'] ?? dcCore::app()->adminurl?->get('admin.plugin.' . My::id(), ['type' => self::$type, 'config' => self::$task->properties->id]);
+            $res   = self::$task->configure($redir);
+
+            echo '
+            <h3>' . sprintf(__('Configure module "%s"'), self::$task->properties->name) . '</h3>
+            <p><a class="back" href="' . $back_url . '">' . __('Back') . '</a></p>
+            <h4>' . Html::escapeHTML(self::$task->properties->description) . '</h4>' .
+
+            (new Form('form-actions'))->method('post')->action(dcCore::app()->adminurl?->get('admin.plugin.' . My::id()))->fields([
+                empty($res) ? (new Text('p', __('Nothing to configure')))->class('message') : (new Text('', $res)),
+                (new Para())->class('clear')->items([
+                    (new Submit(['save']))->value(__('Save')),
+                    (new Hidden('type', self::$type)),
+                    (new Hidden('config', self::$task->properties->id)),
+                    (new Hidden('redir', $redir)),
+                    dcCore::app()->formNonce(false),
+                ]),
+            ])->render();
+        }
+    }
+
+    private static function displayActions(): void
+    {
+        echo
+        (new Form('improve_menu'))->method('get')->action(dcCore::app()->adminurl?->get('admin.plugin.' . My::id()))->fields([
+            (new Para())->class('anchor-nav')->items([
+                (new Label(__('Goto:'), Label::OUTSIDE_LABEL_BEFORE))->for('type')->class('classic'),
+                (new Select('type'))->default(self::$type)->items([__('Plugins') => 'plugin', __('Themes') => 'theme']),
+                (new Submit('simenu'))->value(__('Save')),
+                (new Hidden('p', My::id())),
+            ]),
+        ])->render();
+
+        $combo_modules = self::comboModules();
+        if (count($combo_modules) == 1) {
+            echo '<p class="message">' . __('No module to manage') . '</p>';
+        } else {
+            echo '<p /><form action="' . dcCore::app()->adminurl?->get('admin.plugin.' . My::id()) . '" method="post" id="form-actions">' .
+            '<table><caption>' . __('List of available tasks') . '</caption><thead><tr>' .
+            '<th colspan="2" class="first">' . __('Task') . '</td>' .
+            '<th scope="col">' . __('Description') . '</td>' .
+            '<th scope="col">' . __('Configuration') . '</td>' .
+            (DC_DEBUG ? '<th scope="col">' . __('Priority') . '</td>' : '') . /* @phpstan-ignore-line */
+            '</tr></thead><tbody>';
+            foreach (Core::instance()->tasks->dump() as $task) {
+                if ($task->isDisabled() || !in_array(self::$type, $task->properties->types)) {
+                    continue;
+                }
+                echo
+                '<tr class="line' . ($task->isConfigured() ? '' : ' offline') . '">' .
+                '<td class="minimal">' .
+                (new Checkbox(
+                    ['actions[]', 'action_' . $task->properties->id],
+                    in_array($task->properties->id, self::getPreference()) && $task->isConfigured()
+                ))->value($task->properties->id)->disabled(!$task->isConfigured())->render() .
+                '</td>' .
+                '<td class="minimal nowrap">' .
+                (new Label(Html::escapeHTML($task->properties->name), Label::OUTSIDE_LABEL_AFTER))->for('action_' . $task->properties->id)->class('classic')->render() .
+                '</td>' .
+                '<td class="maximal">' . $task->properties->description . '</td>' .
+                '<td class="minimal nowrap modules">' . (
+                    false === $task->properties->configurator ? '' :
+                        '<a class="module-config" href="' . dcCore::app()->adminurl?->get('admin.plugin.' . My::id(), ['type' => self::$type, 'config' => $task->properties->id]) .
+                        '" title="' . sprintf(__("Configure action '%s'"), $task->properties->name) . '">' . __('Configure') . '</a>'
+                ) . '</td>' .
+                (DC_DEBUG ? '<td class="minimal"><span class="debug">' . $task->properties->priority . '</span></td>' : '') . /* @phpstan-ignore-line */
+                '</tr>';
+            }
+
+            echo '</tbody></table>' .
+            (new Div())->class('two-cols')->items([
+                (new Para())->class('col left')->items([
+                    (new Checkbox('save_preferences', !empty($_POST['save_preferences'])))->value(1),
+                    (new Label(__('Save fields selection as preference'), Label::OUTSIDE_LABEL_AFTER))->for('save_preferences')->class('classic'),
+                ]),
+                (new Para())->class('col right')->items([
+                    (new Label(__('Select a module:'), Label::OUTSIDE_LABEL_BEFORE))->for('module')->class('classic'),
+                    (new Select('module'))->default(self::$module)->items($combo_modules),
+                    (new Submit('fix'))->value(__('Fix it')),
+                    (new Hidden(['type'], self::$type)),
+                    dcCore::app()->formNonce(false),
+                ]),
+            ])->render() .
+            '<br class="clear" />
+            </form>';
+
+            if (!empty($_REQUEST['upd']) && !dcCore::app()->blog?->settings->get(My::id())->get('nodetails')) {
+                $logs = Core::instance()->parseLogs((int) $_REQUEST['upd']);
+
+                if (!empty($logs)) {
+                    echo '<div class="fieldset"><h4>' . __('Details') . '</h4>';
+                    foreach ($logs as $path => $types) {
+                        echo '<h5>' . $path . '</h5>';
+                        foreach ($types as $type => $tools) {
+                            echo '<div class="' . $type . '"><ul>';
+                            foreach ($tools as $tool => $msgs) {
+                                $a = Core::instance()->tasks->get($tool);
+                                if (null !== $a) {
+                                    echo '<li>' . $a->properties->name . '<ul>';
+                                    foreach ($msgs as $msg) {
+                                        echo '<li>' . $msg . '</li>';
+                                    }
+                                }
+                                echo '</ul></li>';
+                            }
+                            echo '</ul></div>';
+                        }
+                        echo '';
+                    }
+                    echo '</div>';
+                }
+            }
+        }
+    }
+
     private static function getType(): string
     {
         return $_REQUEST['type'] ?? 'plugin';
@@ -76,9 +282,9 @@ class Manage extends dcNsProcess
         return $module;
     }
 
-    private static function getAction(): ?Action
+    private static function getTask(): ?Task
     {
-        return empty($_REQUEST['config']) ? null : self::$improve->tasks->get($_REQUEST['config']);
+        return empty($_REQUEST['config']) ? null : Core::instance()->tasks->get($_REQUEST['config']);
     }
 
     private static function getPreference(bool $all = false): array
@@ -105,9 +311,9 @@ class Manage extends dcNsProcess
             $preferences              = self::getPreference(true);
             $preferences[self::$type] = [];
             if (!empty($_POST['actions'])) {
-                foreach (self::$improve->tasks->dump() as $action) {
-                    if (!$action->isDisabled() && in_array(self::$type, $action->types()) && in_array($action->id(), $_POST['actions'])) {
-                        $preferences[self::$type][] = $action->id();
+                foreach (Core::instance()->tasks->dump() as $task) {
+                    if (!$task->isDisabled() && in_array(self::$type, $task->properties->types) && in_array($task->properties->id, $_POST['actions'])) {
+                        $preferences[self::$type][] = $task->properties->id;
                     }
                 }
             }
@@ -151,211 +357,4 @@ class Manage extends dcNsProcess
 
         return array_merge([__('Select a module') => '-'], $combo_modules);
     }
-
-    public static function process(): bool
-    {
-        if (!static::$init) {
-            return false;
-        }
-
-        self::$improve = Core::instance();
-        self::$type    = self::getType();
-        self::$module  = self::getModule();
-        self::$action  = self::getAction();
-
-        $log_id = '';
-        $done   = self::setPreferences();
-
-        if (!empty($_POST['fix'])) {
-            if (empty($_POST['actions'])) {
-                dcAdminNotices::addWarningNotice(__('No action selected'));
-            } elseif (self::$module == '-') {
-                dcAdminNotices::addWarningNotice(__('No module selected'));
-            } else {
-                try {
-                    $time = self::$improve->fixModule(
-                        self::$type == 'plugin' ? dcCore::app()->plugins->getDefine(self::$module) : dcCore::app()->themes->getDefine(self::$module),
-                        $_POST['actions']
-                    );
-                    $log_id = self::$improve->writeLogs();
-                    dcCore::app()->blog?->triggerBlog();
-
-                    if (self::$improve->hasLog('error')) {
-                        $notice = ['type' => dcAdminNotices::NOTICE_ERROR, 'msg' => __('Fix of "%s" complete in %s secondes with errors')];
-                    } elseif (self::$improve->hasLog('warning')) {
-                        $notice = ['type' => dcAdminNotices::NOTICE_WARNING, 'msg' => __('Fix of "%s" complete in %s secondes with warnings')];
-                    } elseif (self::$improve->hasLog('success')) {
-                        $notice = ['type' => dcAdminNotices::NOTICE_SUCCESS, 'msg' => __('Fix of "%s" complete in %s secondes')];
-                    } else {
-                        $notice = ['type' => dcAdminNotices::NOTICE_SUCCESS, 'msg' => __('Fix of "%s" complete in %s secondes without messages')];
-                    }
-                    dcAdminNotices::addNotice($notice['type'], sprintf($notice['msg'], self::$module, $time));
-
-                    $done = true;
-                } catch (Exception $e) {
-                    dcCore::app()->error->add($e->getMessage());
-                    $done = false;
-                }
-            }
-        }
-
-        if ($done) {
-            dcCore::app()->adminurl?->redirect('admin.plugin.' . My::id(), ['type' => self::$type, 'module' => self::$module, 'upd' => $log_id]);
-        }
-
-        return true;
-    }
-
-    public static function render(): void
-    {
-        if (!static::$init) {
-            return;
-        }
-
-        dcPage::openModule(
-            My::name(),
-            dcPage::jsModuleLoad(My::id() . '/js/index.js') .
-            (self::$action === null ? '' : self::$action->header())
-        );
-
-        echo
-        dcPage::breadcrumb([
-            __('Plugins')                                                                                                                 => '',
-            My::name()                                                                                                                    => '',
-            empty($_REQUEST['config']) ? (self::$type == 'theme' ? __('Themes actions') : __('Plugins actions')) : __('Configure module') => '',
-        ]) .
-        dcPage::notices();
-
-        if (empty($_REQUEST['config'])) {
-            self::displayActions();
-        } else {
-            self::displayConfigurator();
-        }
-
-        dcPage::closeModule();
-    }
-
-    private static function displayConfigurator(): void
-    {
-        $back_url = $_REQUEST['redir'] ?? dcCore::app()->adminurl?->get('admin.plugin.' . My::id(), ['type' => self::$type]);
-
-        if (null === self::$action) {
-            echo '
-            <p class="warning">' . __('Unknow module') . '</p>
-            <p><a class="back" href="' . $back_url . '">' . __('Back') . '</a></p>';
-        } else {
-            $redir = $_REQUEST['redir'] ?? dcCore::app()->adminurl?->get('admin.plugin.' . My::id(), ['type' => self::$type, 'config' => self::$action->id()]);
-            $res   = self::$action->configure($redir);
-
-            echo '
-            <h3>' . sprintf(__('Configure module "%s"'), self::$action->name()) . '</h3>
-            <p><a class="back" href="' . $back_url . '">' . __('Back') . '</a></p>
-            <h4>' . Html::escapeHTML(self::$action->description()) . '</h4>' .
-
-            (new Form('form-actions'))->method('post')->action(dcCore::app()->adminurl?->get('admin.plugin.' . My::id()))->fields([
-                empty($res) ? (new Text('p', __('Nothing to configure')))->class('message') : (new Text('', $res)),
-                (new Para())->class('clear')->items([
-                    (new Submit(['save']))->value(__('Save')),
-                    (new Hidden('type', self::$type)),
-                    (new Hidden('config', self::$action->id())),
-                    (new Hidden('redir', $redir)),
-                    dcCore::app()->formNonce(false),
-                ]),
-            ])->render();
-        }
-    }
-
-    private static function displayActions(): void
-    {
-        echo
-        (new Form('improve_menu'))->method('get')->action(dcCore::app()->adminurl?->get('admin.plugin.' . My::id()))->fields([
-            (new Para())->class('anchor-nav')->items([
-                (new Label(__('Goto:'), Label::OUTSIDE_LABEL_BEFORE))->for('type')->class('classic'),
-                (new Select('type'))->default(self::$type)->items([__('Plugins') => 'plugin', __('Themes') => 'theme']),
-                (new Submit('simenu'))->value(__('Save')),
-                (new Hidden('p', My::id())),
-            ]),
-        ])->render();
-
-        $combo_modules = self::comboModules();
-        if (count($combo_modules) == 1) {
-            echo '<p class="message">' . __('No module to manage') . '</p>';
-        } else {
-            echo '<form action="' . dcCore::app()->adminurl?->get('admin.plugin.' . My::id()) . '" method="post" id="form-actions">' .
-            '<table><caption class="hidden">' . __('Actions') . '</caption><thead><tr>' .
-            '<th colspan="2" class="first">' . __('Action') . '</td>' .
-            '<th scope="col">' . __('Description') . '</td>' .
-            '<th scope="col">' . __('Configuration') . '</td>' .
-            (DC_DEBUG ? '<th scope="col">' . __('Priority') . '</td>' : '') . /* @phpstan-ignore-line */
-            '</tr></thead><tbody>';
-            foreach (self::$improve->tasks->dump() as $action) {
-                if ($action->isDisabled() || !in_array(self::$type, $action->types())) {
-                    continue;
-                }
-                echo
-                '<tr class="line' . ($action->isConfigured() ? '' : ' offline') . '">' .
-                '<td class="minimal">' .
-                (new Checkbox(
-                    ['actions[]', 'action_' . $action->id()],
-                    in_array($action->id(), self::getPreference()) && $action->isConfigured()
-                ))->value($action->id())->disabled(!$action->isConfigured())->render() .
-                '</td>' .
-                '<td class="minimal nowrap">' .
-                (new Label(Html::escapeHTML($action->name()), Label::OUTSIDE_LABEL_AFTER))->for('action_' . $action->id())->class('classic')->render() .
-                '</td>' .
-                '<td class="maximal">' . $action->description() . '</td>' .
-                '<td class="minimal nowrap modules">' . (
-                    false === $action->configurator() ? '' :
-                        '<a class="module-config" href="' . dcCore::app()->adminurl?->get('admin.plugin.' . My::id(), ['type' => self::$type, 'config' => $action->id()]) .
-                        '" title="' . sprintf(__("Configure action '%s'"), $action->name()) . '">' . __('Configure') . '</a>'
-                ) . '</td>' .
-                (DC_DEBUG ? '<td class="minimal"><span class="debug">' . $action->priority() . '</span></td>' : '') . /* @phpstan-ignore-line */
-                '</tr>';
-            }
-
-            echo '</tbody></table>' .
-            (new Div())->class('two-cols')->items([
-                (new Para())->class('col left')->items([
-                    (new Checkbox('save_preferences', !empty($_POST['save_preferences'])))->value(1),
-                    (new Label(__('Save fields selection as preference'), Label::OUTSIDE_LABEL_AFTER))->for('save_preferences')->class('classic'),
-                ]),
-                (new Para())->class('col right')->items([
-                    (new Label(__('Select a module:'), Label::OUTSIDE_LABEL_BEFORE))->for('module')->class('classic'),
-                    (new Select('module'))->default(self::$module)->items($combo_modules),
-                    (new Submit('fix'))->value(__('Fix it')),
-                    (new Hidden(['type'], self::$type)),
-                    dcCore::app()->formNonce(false),
-                ]),
-            ])->render() .
-            '<br class="clear" />
-            </form>';
-
-            if (!empty($_REQUEST['upd']) && !dcCore::app()->blog?->settings->get(My::id())->get('nodetails')) {
-                $logs = self::$improve->parseLogs((int) $_REQUEST['upd']);
-
-                if (!empty($logs)) {
-                    echo '<div class="fieldset"><h4>' . __('Details') . '</h4>';
-                    foreach ($logs as $path => $types) {
-                        echo '<h5>' . $path . '</h5>';
-                        foreach ($types as $type => $tools) {
-                            echo '<div class="' . $type . '"><ul>';
-                            foreach ($tools as $tool => $msgs) {
-                                $a = self::$improve->tasks->get($tool);
-                                if (null !== $a) {
-                                    echo '<li>' . $a->name() . '<ul>';
-                                    foreach ($msgs as $msg) {
-                                        echo '<li>' . $msg . '</li>';
-                                    }
-                                }
-                                echo '</ul></li>';
-                            }
-                            echo '</ul></div>';
-                        }
-                        echo '';
-                    }
-                    echo '</div>';
-                }
-            }
-        }
-    }
 }
diff --git a/src/Task.php b/src/Task.php
index 26cb5a1..f3ea646 100644
--- a/src/Task.php
+++ b/src/Task.php
@@ -14,101 +14,65 @@ declare(strict_types=1);
 
 namespace Dotclear\Plugin\improve;
 
-use ArrayObject;
-use dcCore;
 use dcModuleDefine;
-use dcPage;
 use Dotclear\Helper\Network\Http;
 
 /**
  * Improve action class helper
  */
-abstract class AbstractTask
+abstract class Task
 {
-    /** @var dcModuleDefine  Current module */
-    protected $module;
+    /** @var    TaskDescriptor  Task descriptor instance */
+    public readonly TaskDescriptor $properties;
 
-    /** @var string     Current full path */
-    protected $path_full = '';
+    /** @var    TaskMessages    Task success messages instance */
+    public readonly TaskMessages $success;
 
-    /** @var string     Current file extension */
-    protected $path_extension = '';
+    /** @var    TaskMessages    Task warning messages instance */
+    public readonly TaskMessages $warning;
 
-    /** @var boolean    Current path is directory */
-    protected $path_is_dir = null;
+    /** @var    TaskMessages    Task error messages instance */
+    public readonly TaskMessages $error;
 
-    /** @var string The child class name */
-    private $class_name = '';
+    /** @var    TaskSettings    Task settings instance */
+    protected readonly TaskSettings $settings;
 
-    /** @var array<string, array>  Messages logs */
-    private $logs = ['success' => [], 'warning' => [], 'error' => []];
-
-    /** @var array<string>  Action module settings */
-    private $settings = [];
-
-    /** @var array List of allowed properties */
-    protected static $allowed_properties = ['id', 'name', 'description', 'priority', 'configurator', 'types'];
+    /** @var    dcModuleDefine  Current module */
+    protected dcModuleDefine $module;
 
     /** @var    bool    Is disabled action */
-    private $disabled = false;
+    private bool $disabled = false;
 
-    /** @var string Module id */
-    private $id = '';
+    /** @var    string  Current full path */
+    protected string $path_full = '';
 
-    /** @var string Module name */
-    private $name = '';
+    /** @var    string  Current file extension */
+    protected string $path_extension = '';
 
-    /** @var string Module description */
-    private $description = '';
-
-    /** @var integer Module id */
-    private $priority = 500;
-
-    /** @var boolean Module has config page */
-    private $configurator = false;
-
-    /** @var array Module supported types */
-    private $types = ['plugin'];
+    /** @var    null|bool    Current path is directory */
+    protected ?bool $path_is_dir = null;
 
     /**
      * Action constructor inits properties and settings of a child class.
      */
     final public function __construct()
     {
-        $this->class_name = str_replace(__NAMESPACE__ . '\\Task\\', '', get_called_class());
+        $this->success    = new TaskMessages();
+        $this->warning    = new TaskMessages();
+        $this->error      = new TaskMessages();
+        $this->properties = $this->getProperties();
+        $this->settings   = new TaskSettings($this->properties->id);
         $this->module     = new dcModuleDefine('undefined');
 
-        $settings = dcCore::app()->blog?->settings->get(My::id())->get('settings_' . $this->class_name);
-        if (null != $settings) {
-            $settings = json_decode($settings, true);
-        }
-        $this->settings = is_array($settings) ? $settings : [];
-
         $this->init();
-
-        // can overload priority by settings
-        if (1 < ($p = (int) dcCore::app()->blog?->settings->get(My::id())->get('priority_' . $this->class_name))) {
-            $this->priority = $p;
-        }
     }
 
     /**
-     * Set action as disabled.
+     * Get task description.
+     *
+     * @return     TaskDescriptor   The task description
      */
-    final public function disable()
-    {
-        $this->disabled = true;
-    }
-
-    /**
-     * Check if actio is disabled.
-     * 
-     * @return  bool True on disabled
-     */
-    final public function isDisabled()
-    {
-        return $this->disabled;
-    }
+    abstract protected function getProperties(): TaskDescriptor;
 
     /**
      * Action initialisation function.
@@ -120,135 +84,47 @@ abstract class AbstractTask
      */
     abstract protected function init(): bool;
 
-    /// @name Properties methods
-    //@{
     /**
-     * Get a definition property of action class
+     * Get a setting.
      *
-     * @param      string   $key     a property or setting id
+     * @param   string  $key    The setting ID
      *
-     * @return     mixed    Value of property or setting of action.
+     * @return  mixed   Value of property or setting of action.
      */
     final public function get(string $key)
     {
-        if (isset($this->settings[$key])) {
-            return $this->settings[$key];
-        }
-
-        return null;
-    }
-
-    /** Get action module id */
-    final public function id(): string
-    {
-        return $this->id;
-    }
-
-    /** Get action module name */
-    final public function name(): string
-    {
-        return $this->name;
-    }
-
-    /** Get action module description */
-    final public function description(): string
-    {
-        return $this->description;
-    }
-
-    /** Get action module priority */
-    final public function priority(): int
-    {
-        return $this->priority;
-    }
-
-    /** Get action module configuration url if any */
-    final public function configurator(): bool
-    {
-        return $this->configurator;
-    }
-
-    /** Get action module supported types */
-    final public function types(): array
-    {
-        return $this->types;
+        return $this->settings->get($key);
     }
 
     /**
-     * Set properties of action class
-     *
-     * @param      array    $properties   Properties
-     *
-     * @return     boolean              Success
+     * Set task as disabled.
      */
-    final protected function setProperties(array $properties): bool
+    final public function disable()
     {
-        foreach ($properties as $key => $value) {
-            if (in_array($key, self::$allowed_properties)) {
-                $this->{$key} = $value;
-            }
-        }
-
-        return true;
-    }
-    //@}
-
-    /// @name Settings methods
-    //@{
-    /**
-     * Get a settings of action class
-     *
-     * @param      string $setting     a settings id
-     *
-     * @return     mixed  A setting of action.
-     */
-    final protected function getSetting(string $setting)
-    {
-        return $this->settings[$setting] ?? null;
+        $this->disabled = true;
     }
 
     /**
-     * Set one or more setting of action class
+     * Check if task is disabled.
      *
-     * @param      mixed  $settings     one or more settings
-     * @param      mixed  $value        value for a single setting
-     *
-     * @return     mixed  A setting of action.
+     * @return  bool True on disabled
      */
-    final protected function setSettings($settings, $value = null)
+    final public function isDisabled()
     {
-        $settings = is_array($settings) ? $settings : [$settings => $value];
-        foreach ($settings as $k => $v) {
-            $this->settings[$k] = $v;
-        }
-
-        return true;
+        return $this->disabled;
     }
 
     /**
-     * Redirection after settings update
+     * Do HTTP redirection.
      *
-     * This save settings update before redirect.
+     * Used after settings form validation to save settings.
      *
-     * @param      string $url      redirect url after settings update
+     * @param   string  $url    The URL redirection
      */
-    final protected function redirect(string $url): bool
+    final protected function redirect(string $url): void
     {
-        if (!is_null(dcCore::app()->blog)) {
-            dcCore::app()->blog->settings->get(My::id())->put(
-                'settings_' . $this->class_name,
-                json_encode($this->settings),
-                'string',
-                null,
-                true,
-                true
-            );
-            dcCore::app()->blog->triggerBlog();
-            dcPage::addSuccessNotice(__('Configuration successfully updated'));
-        }
+        $this->settings->save();
         Http::redirect($url);
-
-        return true;
     }
 
     /**
@@ -285,7 +161,6 @@ abstract class AbstractTask
     {
         return null;
     }
-    //@}
 
     /**
      * Set in class var current module definitions.
@@ -314,6 +189,10 @@ abstract class AbstractTask
         $this->path_extension = $path_extension;
         $this->path_is_dir    = $path_is_dir;
 
+        $this->success->path($path_full);
+        $this->warning->path($path_full);
+        $this->error->path($path_full);
+
         return true;
     }
 
@@ -374,133 +253,4 @@ abstract class AbstractTask
         return null;
     }
     //@}
-
-    /// @name Logs methods
-    //@{
-    /**
-     * Set an action log.
-     *
-     * Log must be use every time an action something happen.
-     *
-     * @param      string $type        type of message, can be error, warning, succes
-     * @param      string $message     message to log
-     *
-     * @return     boolean  True if message is logged.
-     */
-    final public function setLog(string $type, string $message): bool
-    {
-        if (empty($this->path_full) || !array_key_exists($type, $this->logs)) {
-            return false;
-        }
-        $this->logs[$type][$this->path_full][] = $message;
-
-        return true;
-    }
-
-    /**
-     * Check if action class has log of given type.
-     *
-     * @param      string $type        type of message, can be error, warning, succes
-     *
-     * @return     boolean  True if messages exist.
-     */
-    final public function hasLog(string $type): bool
-    {
-        return array_key_exists($type, $this->logs) && !empty($this->logs[$type]);
-    }
-
-    /**
-     * Get action logs.
-     *
-     * @param      string|null $type        type of message, can be error, warning, succes
-     *
-     * @return     array  Arry of given type of log or all if type is null
-     */
-    final public function getLogs($type = null): array
-    {
-        if (null === $type) {
-            return $this->logs;
-        }
-        if (empty($this->path_full)
-            || !array_key_exists($type, $this->logs)
-            || !array_key_exists($this->path_full, $this->logs[$type])
-        ) {
-            return [];
-        }
-
-        return $this->logs[$type][$this->path_full];
-    }
-
-    /**
-     * Set a log of type error.
-     */
-    final public function setError(string $message): bool
-    {
-        return $this->setLog('error', $message);
-    }
-
-    /**
-     * Check logs of type error exists.
-     */
-    final public function hasError(): bool
-    {
-        return !empty($this->getLogs('error'));
-    }
-
-    /**
-     * Get logs of type error.
-     */
-    final public function getErrors(): array
-    {
-        return $this->getLogs('error');
-    }
-
-    /**
-     * Set a log of type warning.
-     */
-    final public function setWarning(string $message): bool
-    {
-        return $this->setLog('warning', $message);
-    }
-
-    /**
-     * Check logs of type error warnings.
-     */
-    final public function hasWarning(): bool
-    {
-        return !empty($this->getLogs('warning'));
-    }
-
-    /**
-     * Get logs of type warning.
-     */
-    final public function getWarnings(): array
-    {
-        return $this->getLogs('warning');
-    }
-
-    /**
-     * Set a log of type success.
-     */
-    final public function setSuccess(string $message): bool
-    {
-        return $this->setLog('success', $message);
-    }
-
-    /**
-     * Check logs of type error success.
-     */
-    final public function hasSuccess(): bool
-    {
-        return !empty($this->getLogs('success'));
-    }
-
-    /**
-     * Get logs of type success.
-     */
-    final public function getSuccess(): array
-    {
-        return $this->getLogs('success');
-    }
-    //@}
 }
diff --git a/src/Task/CssHeader.php b/src/Task/CssHeader.php
index 5fbd047..91b5f31 100644
--- a/src/Task/CssHeader.php
+++ b/src/Task/CssHeader.php
@@ -27,13 +27,16 @@ use Dotclear\Helper\Html\Form\{
     Textarea
 };
 use Dotclear\Helper\Html\Html;
-use Dotclear\Plugin\improve\AbstractTask;
+use Dotclear\Plugin\improve\{
+    Task,
+    TaskDescriptor
+};
 use Exception;
 
 /**
  * Improve action module php header
  */
-class cssheader extends AbstractTask
+class CssHeader extends Task
 {
     /** @var string Exemple of header */
     private static $exemple = <<<EOF
@@ -73,17 +76,20 @@ class cssheader extends AbstractTask
     /** @var string Settings bloc content */
     private $bloc_content = '';
 
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'cssheader',
+            name: __('CSS header'),
+            description: __('Add or remove phpdoc header bloc from css file'),
+            configurator: true,
+            types: ['plugin', 'theme'],
+            priority: 340
+        );
+    }
+
     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',
@@ -92,7 +98,7 @@ class cssheader extends AbstractTask
             __('Remove existing bloc header')      => 'remove',
         ];
 
-        $bloc_content       = $this->getSetting('bloc_content');
+        $bloc_content       = $this->settings->get('bloc_content');
         $this->bloc_content = is_string($bloc_content) ? $bloc_content : '';
 
         return true;
@@ -100,13 +106,13 @@ class cssheader extends AbstractTask
 
     public function isConfigured(): bool
     {
-        return !empty($this->getSetting('bloc_action'));
+        return !empty($this->settings->get('bloc_action'));
     }
 
     public function configure($url): ?string
     {
         if (!empty($_POST['save'])) {
-            $this->setSettings([
+            $this->settings->set([
                 'bloc_action'       => !empty($_POST['bloc_action']) ? $_POST['bloc_action'] : '',
                 'bloc_content'      => !empty($_POST['bloc_content']) ? $_POST['bloc_content'] : '',
                 'exclude_locales'   => !empty($_POST['exclude_locales']),
@@ -121,16 +127,16 @@ class cssheader extends AbstractTask
                 // bloc_action
                 (new Para())->items([
                     (new Label(__('Action:'), Label::OUTSIDE_LABEL_BEFORE))->for('bloc_action'),
-                    (new Select('bloc_action'))->default($this->getSetting('bloc_action'))->items($this->action_bloc),
+                    (new Select('bloc_action'))->default($this->settings->get('bloc_action'))->items($this->action_bloc),
                 ]),
                 // exclude_locales
                 (new Para())->items([
-                    (new Checkbox('exclude_locales', !empty($this->getSetting('exclude_locales'))))->value(1),
+                    (new Checkbox('exclude_locales', !empty($this->settings->get('exclude_locales'))))->value(1),
                     (new Label(__('Do not add bloc to files from "locales" and "libs" folder'), Label::OUTSIDE_LABEL_AFTER))->for('exclude_locales')->class('classic'),
                 ]),
                 // exclude_templates
                 (new Para())->items([
-                    (new Checkbox('exclude_templates', !empty($this->getSetting('exclude_templates'))))->value(1),
+                    (new Checkbox('exclude_templates', !empty($this->settings->get('exclude_templates'))))->value(1),
                     (new Label(__('Do not add bloc to files from "tpl" and "default-templates" folder'), Label::OUTSIDE_LABEL_AFTER))->for('exclude_templates')->class('classic'),
                 ]),
             ]),
@@ -157,7 +163,7 @@ class cssheader extends AbstractTask
     public function openModule(): ?bool
     {
         if (is_null(dcCore::app()->auth)) {
-            $this->setWarning(__('Auth is not set'));
+            $this->warning->add(__('Auth is not set'));
 
             return null;
         }
@@ -165,7 +171,7 @@ class cssheader extends AbstractTask
         $bloc = trim($this->bloc_content);
 
         if (empty($bloc)) {
-            $this->setWarning(__('bloc is empty'));
+            $this->warning->add(__('bloc is empty'));
 
             return null;
         }
@@ -195,11 +201,11 @@ class cssheader extends AbstractTask
                     (string) $bloc
                 )
             );
-            $this->setSuccess(__('Prepare header info'));
+            $this->success->add(__('Prepare header info'));
 
             return null;
         } catch (Exception $e) {
-            $this->setError(__('Failed to parse bloc'));
+            $this->error->add(__('Failed to parse bloc'));
 
             return null;
         }
@@ -209,11 +215,11 @@ class cssheader extends AbstractTask
     {
         $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)(\/.*?|)$/', $this->path_full)
+        if (!empty($this->settings->get('exclude_locales'))   && preg_match('/\/(locales|libs)(\/.*?|)$/', $this->path_full)
+         || !empty($this->settings->get('exclude_templates')) && preg_match('/\/(tpl|default-templates)(\/.*?|)$/', $this->path_full)
         ) {
             if (!$skipped) {
-                $this->setSuccess(__('Skip directory'));
+                $this->success->add(__('Skip directory'));
             }
             $this->stop_scan = true;
         }
@@ -223,22 +229,22 @@ class cssheader extends AbstractTask
 
     public function readFile(&$content): ?bool
     {
-        if ($this->stop_scan || $this->path_extension != 'css' || $this->hasError()) {
+        if ($this->stop_scan || $this->path_extension != 'css' || !$this->error->empty()) {
             return null;
         }
-        if (empty($this->getSetting('bloc_action'))) {
+        if (empty($this->settings->get('bloc_action'))) {
             return null;
         }
         $clean = $this->deleteDocBloc($content);
-        if ($this->getSetting('bloc_action') == 'remove') {
+        if ($this->settings->get('bloc_action') == 'remove') {
             $content = $clean;
 
             return null;
         }
-        if ($content != $clean && $this->getSetting('bloc_action') == 'create') {
+        if ($content != $clean && $this->settings->get('bloc_action') == 'create') {
             return null;
         }
-        if ($content == $clean && $this->getSetting('bloc_action') == 'replace') {
+        if ($content == $clean && $this->settings->get('bloc_action') == 'replace') {
             return null;
         }
 
@@ -264,7 +270,7 @@ class cssheader extends AbstractTask
         );
         if ($count && $res) {
             $res = str_replace("\n * \n", "\n *\n", $res);
-            $this->setSuccess(__('Write new doc bloc content'));
+            $this->success->add(__('Write new doc bloc content'));
         }
 
         return (string) $res;
@@ -286,7 +292,7 @@ class cssheader extends AbstractTask
             $count
         );
         if ($count) {
-            $this->setSuccess(__('Delete old doc bloc content'));
+            $this->succes->set(__('Delete old doc bloc content'));
         }
 
         return (string) $res;
diff --git a/src/Task/DcDeprecated.php b/src/Task/DcDeprecated.php
index ed8087a..40f1183 100644
--- a/src/Task/DcDeprecated.php
+++ b/src/Task/DcDeprecated.php
@@ -18,35 +18,36 @@ use Dotclear\Helper\File\{
     Files,
     Path
 };
-use Dotclear\Plugin\improve\AbstractTask;
+use Dotclear\Plugin\improve\{
+    Task,
+    TaskDescriptor
+};
 
 /**
  * Improve action module Dotclear depreciated
  */
-class dcdeprecated extends AbstractTask
+class DcDeprecated extends Task
 {
     /** @var array Deprecated functions [filetype [pattern, deprecated, replacement, version, help link]] */
     private $deprecated = ['php' => [], 'js' => []];
 
-    protected function init(): bool
+    protected function getProperties(): TaskDescriptor
     {
-        $this->setProperties([
-            'id'          => 'dcdeprecated',
-            'name'        => __('Dotclear deprecated'),
-            'description' => __('Search for use of deprecated Dotclear functions'),
-            'priority'    => 520,
-            'types'       => ['plugin', 'theme'],
-        ]);
-        $this->loadDeprecatedDefinition();
-
-        return true;
+        return new TaskDescriptor(
+            id: 'dcdeprecated',
+            name: __('Dotclear deprecated'),
+            description: __('Search for use of deprecated Dotclear functions'),
+            configurator: false,
+            types: ['plugin', 'theme'],
+            priority: 520
+        );
     }
 
-    private function loadDeprecatedDefinition(): void
+    protected function init(): bool
     {
         $path = Path::real(__DIR__ . '/dcdeprecated');
         if (!$path || !is_dir($path) || !is_readable($path)) {
-            return;
+            return false;
         }
         $files = Files::scandir($path);
 
@@ -62,6 +63,8 @@ class dcdeprecated extends AbstractTask
                 $this->deprecated['js'] = array_merge($this->deprecated['js'], $tmp['js']);
             }
         }
+
+        return true;
     }
 
     public function isConfigured(): bool
@@ -76,7 +79,7 @@ class dcdeprecated extends AbstractTask
         }
         foreach ($this->deprecated[$this->path_extension] as $d) {
             if (preg_match('/' . $d[0] . '/i', $content)) {
-                $this->setWarning(sprintf(__('Possible use of deprecated "%s", you should use "%s" instead since Dotclear %s.'), $d[1], __($d[2]), $d[3]) . (empty($d[4]) ? '' : ' <a href="' . $d['4'] . '">' . __('Help') . '</a> '));
+                $this->warning->add(sprintf(__('Possible use of deprecated "%s", you should use "%s" instead since Dotclear %s.'), $d[1], __($d[2]), $d[3]) . (empty($d[4]) ? '' : ' <a href="' . $d['4'] . '">' . __('Help') . '</a> '));
             }
         }
 
diff --git a/src/Task/DcStore.php b/src/Task/DcStore.php
index 7838d05..12760c8 100644
--- a/src/Task/DcStore.php
+++ b/src/Task/DcStore.php
@@ -27,29 +27,35 @@ use Dotclear\Helper\Html\Form\{
 };
 use Dotclear\Helper\Html\XmlTag;
 use Dotclear\Helper\Text;
-use Dotclear\Plugin\improve\AbstractTask;
+use Dotclear\Plugin\improve\{
+    Task,
+    taskDescriptor
+};
 use Exception;
 
 /**
  * Improve action module dcstore.xml
  */
-class dcstore extends AbstractTask
+class DcStore extends Task
 {
     /** @var string Settings dcstore zip url pattern */
     private $pattern = '';
 
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'dcstore',
+            name: __('Store file'),
+            description: __('Re-create dcstore.xml file according to _define.php variables'),
+            configurator: true,
+            types: ['plugin', 'theme'],
+            priority: 420
+        );
+    }
+
     protected function init(): bool
     {
-        $this->setProperties([
-            'id'           => 'dcstore',
-            'name'         => __('Store file'),
-            'description'  => __('Re-create dcstore.xml file according to _define.php variables'),
-            'priority'     => 420,
-            'configurator' => true,
-            'types'        => ['plugin', 'theme'],
-        ]);
-
-        $pattern       = $this->getSetting('pattern');
+        $pattern       = $this->settings->get('pattern');
         $this->pattern = is_string($pattern) ? $pattern : '';
 
         return true;
@@ -57,13 +63,13 @@ class dcstore extends AbstractTask
 
     public function isConfigured(): bool
     {
-        return !empty($this->getSetting('pattern'));
+        return !empty($this->settings->get('pattern'));
     }
 
     public function configure($url): ?string
     {
         if (!empty($_POST['save']) && !empty($_POST['dcstore_pattern'])) {
-            $this->setSettings('pattern', (string) $_POST['dcstore_pattern']);
+            $this->settings->set('pattern', (string) $_POST['dcstore_pattern']);
             $this->redirect($url);
         }
 
@@ -85,7 +91,7 @@ class dcstore extends AbstractTask
     public function openModule(): ?bool
     {
         $content = $this->generateXML();
-        if ($this->hasError()) {
+        if (!$this->error->empty()) {
             return false;
         }
 
@@ -93,9 +99,9 @@ class dcstore extends AbstractTask
 
         try {
             Files::putContent($this->module->get('root') . DIRECTORY_SEPARATOR . 'dcstore.xml', $content);
-            $this->setSuccess(__('Write dcstore.xml file.'));
+            $this->success->add(__('Write dcstore.xml file.'));
         } catch (Exception $e) {
-            $this->setError(__('Failed to write dcstore.xml file'));
+            $this->error->add(__('Failed to write dcstore.xml file'));
 
             return false;
         }
@@ -113,37 +119,37 @@ class dcstore extends AbstractTask
 
         # name
         if (empty($this->module->get('name'))) {
-            $this->setError(__('unknow module name'));
+            $this->error->add(__('unknow module name'));
         }
         $rsp->insertNode(new XmlTag('name', $this->module->get('name')));
 
         # version
         if (empty($this->module->get('version'))) {
-            $this->setError(__('unknow module version'));
+            $this->error->add(__('unknow module version'));
         }
         $rsp->insertNode(new XmlTag('version', $this->module->get('version')));
 
         # author
         if (empty($this->module->get('author'))) {
-            $this->setError(__('unknow module author'));
+            $this->error->add(__('unknow module author'));
         }
         $rsp->insertNode(new XmlTag('author', $this->module->get('author')));
 
         # desc
         if (empty($this->module->get('desc'))) {
-            $this->setError(__('unknow module description'));
+            $this->error->add(__('unknow module description'));
         }
         $rsp->insertNode(new XmlTag('desc', $this->module->get('desc')));
 
         # repository
         if (empty($this->module->get('repository'))) {
-            $this->setError(__('no repository set in _define.php'));
+            $this->error->add(__('no repository set in _define.php'));
         }
 
         # file
         $file_pattern = $this->parseFilePattern();
         if (empty($file_pattern)) {
-            $this->setError(__('no zip file pattern set in configuration'));
+            $this->error->add(__('no zip file pattern set in configuration'));
         }
         $rsp->insertNode(new XmlTag('file', $file_pattern));
 
@@ -161,14 +167,14 @@ class dcstore extends AbstractTask
             }
         }
         if (empty($this->module->get('dc_min'))) {
-            $this->setWarning(__('no minimum dotclear version'));
+            $this->warning->add(__('no minimum dotclear version'));
         } else {
             $rsp->insertNode(new XmlTag('da:dcmin', $this->module->get('dc_min')));
         }
 
         # da details
         if (empty($this->module->get('details'))) {
-            $this->setWarning(__('no details URL'));
+            $this->warning->add(__('no details URL'));
         } else {
             $rsp->insertNode(new XmlTag('da:details', $this->module->get('details')));
         }
@@ -183,7 +189,7 @@ class dcstore extends AbstractTask
 
         # da support
         if (empty($this->module->get('support'))) {
-            $this->setWarning(__('no support URL'));
+            $this->warning->add(__('no support URL'));
         } else {
             $rsp->insertNode(new XmlTag('da:support', $this->module->get('support')));
         }
diff --git a/src/Task/EndOfFile.php b/src/Task/EndOfFile.php
index aa35b0a..05180b9 100644
--- a/src/Task/EndOfFile.php
+++ b/src/Task/EndOfFile.php
@@ -23,24 +23,30 @@ use Dotclear\Helper\Html\Form\{
     Note,
     Para
 };
-use Dotclear\Plugin\improve\AbstractTask;
+use Dotclear\Plugin\improve\{
+    Task,
+    TaskDescriptor
+};
 
 /**
  * Improve action module end of file
  */
-class endoffile extends AbstractTask
+class EndOfFile extends Task
 {
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'endoffile',
+            name: __('End of files'),
+            description: __('Remove php tag and empty lines from end of files'),
+            configurator: true,
+            types: ['plugin', 'theme'],
+            priority: 860
+        );
+    }
+
     protected function init(): bool
     {
-        $this->setProperties([
-            'id'           => 'endoffile',
-            'name'         => __('End of files'),
-            'description'  => __('Remove php tag and empty lines from end of files'),
-            'priority'     => 860,
-            'configurator' => true,
-            'types'        => ['plugin', 'theme'],
-        ]);
-
         return true;
     }
 
@@ -52,7 +58,7 @@ class endoffile extends AbstractTask
     public function configure($url): ?string
     {
         if (!empty($_POST['save'])) {
-            $this->setSettings('psr2', !empty($_POST['endoffile_psr2']));
+            $this->settings->set('psr2', !empty($_POST['endoffile_psr2']));
             $this->redirect($url);
         }
 
@@ -60,7 +66,7 @@ class endoffile extends AbstractTask
             (new Fieldset())->class('fieldset')->legend((new Legend(__('Contents'))))->fields([
                 // endoffile_psr2
                 (new Para())->items([
-                    (new Checkbox('endoffile_psr2', !empty($this->getSetting('psr2'))))->value(1),
+                    (new Checkbox('endoffile_psr2', !empty($this->settings->get('psr2'))))->value(1),
                     (new Label(__('Add a blank line to the end of file'), Label::OUTSIDE_LABEL_AFTER))->for('endoffile_psr2')->class('classic'),
                 ]),
                 (new Note())->text(__('PSR2 must have a blank line, whereas PSR12 must not.'))->class('form-note'),
@@ -77,9 +83,9 @@ class endoffile extends AbstractTask
             ['/(\s*)(\?>\s*)$/', '/\n+$/'],
             '',
             $content
-        ) . ($this->getSetting('psr2') ? "\n" : '');
+        ) . ($this->settings->get('psr2') ? "\n" : '');
         if ($content != $clean) {
-            $this->setSuccess(__('Replace end of file'));
+            $this->success->add(__('Replace end of file'));
             $content = $clean;
         }
 
diff --git a/src/Task/GitShields.php b/src/Task/GitShields.php
index 043a47d..70689e9 100644
--- a/src/Task/GitShields.php
+++ b/src/Task/GitShields.php
@@ -25,12 +25,15 @@ use Dotclear\Helper\Html\Form\{
     Note,
     Para
 };
-use Dotclear\Plugin\improve\AbstractTask;
+use Dotclear\Plugin\improve\{
+    Task,
+    TaskDescriptor
+};
 
 /**
  * Improve action module Github shields.io
  */
-class gitshields extends AbstractTask
+class GitShields extends Task
 {
     /** @var string Username of git repo */
     private $username = '';
@@ -60,33 +63,36 @@ class gitshields extends AbstractTask
         'license'   => '[![License](https://img.shields.io/github/license/%username%/%module%)](https://github.com/%username%/%module%/blob/master/LICENSE)',
     ];
 
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'gitshields',
+            name: __('Shields badges'),
+            description: __('Add and maintain shields.io badges to the REDAME.md file'),
+            configurator: true,
+            types: ['plugin', 'theme'],
+            priority: 380
+        );
+    }
+
     protected function init(): bool
     {
-        $this->setProperties([
-            'id'           => 'gitshields',
-            'name'         => __('Shields badges'),
-            'description'  => __('Add and maintain shields.io badges to the REDAME.md file'),
-            'priority'     => 380,
-            'configurator' => true,
-            'types'        => ['plugin', 'theme'],
-        ]);
-
-        $username        = $this->getSetting('username');
+        $username        = $this->settings->get('username');
         $this->username  = is_string($username) ? $username : '';
-        $this->dotaddict = (bool) $this->getSetting('dotaddict');
+        $this->dotaddict = (bool) $this->settings->get('dotaddict');
 
         return true;
     }
 
     public function isConfigured(): bool
     {
-        return !empty($this->getSetting('username'));
+        return !empty($this->settings->get('username'));
     }
 
     public function configure($url): ?string
     {
         if (!empty($_POST['save']) && !empty($_POST['username'])) {
-            $this->setSettings([
+            $this->settings->set([
                 'username'  => (string) $_POST['username'],
                 'dotaddict' => !empty($_POST['dotaddict']),
             ]);
@@ -158,7 +164,7 @@ class gitshields extends AbstractTask
             ));
         }
         $this->blocs = $blocs;
-        $this->setSuccess(__('Prepare custom shield info'));
+        $this->success->add(__('Prepare custom shield info'));
     }
 
     private function getDotclearVersion(): string
@@ -192,7 +198,7 @@ class gitshields extends AbstractTask
             $count
         );
         if ($count && $res) {
-            $this->setSuccess(__('Write new shield bloc'));
+            $this->success->add(__('Write new shield bloc'));
         }
 
         return (string) $res;
@@ -208,7 +214,7 @@ class gitshields extends AbstractTask
             $count
         );
         if ($count && $res) {
-            $this->setSuccess(__('Delete old shield bloc'));
+            $this->success->add(__('Delete old shield bloc'));
         }
 
         return (string) $res;
diff --git a/src/Task/LicenseFile.php b/src/Task/LicenseFile.php
index bbe796b..4292ba7 100644
--- a/src/Task/LicenseFile.php
+++ b/src/Task/LicenseFile.php
@@ -24,13 +24,16 @@ use Dotclear\Helper\Html\Form\{
     Para,
     Select
 };
-use Dotclear\Plugin\improve\AbstractTask;
+use Dotclear\Plugin\improve\{
+    Task,
+    TaskDescriptor
+};
 use Exception;
 
 /**
  * Improve action module license file
  */
-class licensefile extends AbstractTask
+class LicenseFile extends Task
 {
     /** @var array Possible license filenames */
     protected static $license_filenames = [
@@ -45,16 +48,20 @@ class licensefile extends AbstractTask
     /** @var array Action */
     private $action_full = [];
 
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'license',
+            name: __('License file'),
+            description: __('Add or remove full license file to module root'),
+            configurator: true,
+            types: ['plugin', 'theme'],
+            priority: 330
+        );
+    }
+
     protected function init(): bool
     {
-        $this->setProperties([
-            'id'           => 'license',
-            'name'         => __('License file'),
-            'description'  => __('Add or remove full license file to module root'),
-            'priority'     => 330,
-            'configurator' => true,
-            'types'        => ['plugin', 'theme'],
-        ]);
         $this->action_version = [
             __('no version selected')                          => '',
             __('gpl2 - GNU General Public License v2')         => 'gpl2',
@@ -82,7 +89,7 @@ class licensefile extends AbstractTask
     public function configure($url): ?string
     {
         if (!empty($_POST['save'])) {
-            $this->setSettings([
+            $this->settings->set([
                 'action_version' => !empty($_POST['action_version']) ? $_POST['action_version'] : '',
                 'action_full'    => !empty($_POST['action_full']) ? $_POST['action_full'] : '',
             ]);
@@ -94,12 +101,12 @@ class licensefile extends AbstractTask
                 // action_version
                 (new Para())->items([
                     (new Label(__('License version:'), Label::OUTSIDE_LABEL_BEFORE))->for('action_version'),
-                    (new Select('action_version'))->default($this->getSetting('action_version'))->items($this->action_version),
+                    (new Select('action_version'))->default($this->settings->get('action_version'))->items($this->action_version),
                 ]),
                 // action_full
                 (new Para())->items([
                     (new Label(__('Action on file:'), Label::OUTSIDE_LABEL_BEFORE))->for('action_full'),
-                    (new Select('action_full'))->default($this->getSetting('action_full'))->items($this->action_full),
+                    (new Select('action_full'))->default($this->settings->get('action_full'))->items($this->action_full),
                 ]),
             ]),
         ])->render();
@@ -107,12 +114,12 @@ class licensefile extends AbstractTask
 
     public function openModule(): ?bool
     {
-        if (in_array($this->getSetting('action_full'), ['remove', 'full','overwrite'])) {
-            $this->deleteFullLicense(($this->getSetting('action_full') == 'overwrite'));
+        if (in_array($this->settings->get('action_full'), ['remove', 'full','overwrite'])) {
+            $this->deleteFullLicense(($this->settings->get('action_full') == 'overwrite'));
         }
-        if (in_array($this->getSetting('action_full'), ['create', 'overwrite', 'full'])) {
-            if (empty($this->getSetting('action_version'))) {
-                $this->setWarning(__('No full license type selected'));
+        if (in_array($this->settings->get('action_full'), ['create', 'overwrite', 'full'])) {
+            if (empty($this->settings->get('action_version'))) {
+                $this->warning->add(__('No full license type selected'));
             } else {
                 $this->writeFullLicense();
             }
@@ -124,16 +131,16 @@ class licensefile extends AbstractTask
     private function writeFullLicense(): ?bool
     {
         try {
-            $full = file_get_contents(__DIR__ . DIRECTORY_SEPARATOR . 'licensefile' . DIRECTORY_SEPARATOR . $this->getSetting('action_version') . '.full.txt');
+            $full = file_get_contents(__DIR__ . DIRECTORY_SEPARATOR . 'licensefile' . DIRECTORY_SEPARATOR . $this->settings->get('action_version') . '.full.txt');
             if (empty($full)) {
-                $this->setError(__('Failed to load license content'));
+                $this->error->add(__('Failed to load license content'));
 
                 return null;
             }
             Files::putContent($this->module->get('root') . DIRECTORY_SEPARATOR . 'LICENSE', str_replace("\r\n", "\n", $full));
-            $this->setSuccess(__('Write new license file "LICENSE"'));
+            $this->success->add(__('Write new license file "LICENSE"'));
         } catch (Exception $e) {
-            $this->setError(__('Failed to write new license file'));
+            $this->error->add(__('Failed to write new license file'));
 
             return null;
         }
@@ -148,11 +155,11 @@ class licensefile extends AbstractTask
                 continue;
             }
             if (!Files::isDeletable($this->module->get('root') . DIRECTORY_SEPARATOR . $file)) {
-                $this->setWarning(sprintf(__('Old license file is not deletable (%s)'), $file));
+                $this->warning->add(sprintf(__('Old license file is not deletable (%s)'), $file));
             } elseif (!@unlink($this->module->get('root') . DIRECTORY_SEPARATOR . $file)) {
-                $this->setError(sprintf(__('Failed to delete old license file (%s)'), $file));
+                $this->error->add(sprintf(__('Failed to delete old license file (%s)'), $file));
             } else {
-                $this->setSuccess(sprintf(__('Delete old license file "%s"'), $file));
+                $this->success->add(sprintf(__('Delete old license file "%s"'), $file));
             }
         }
 
diff --git a/src/Task/NewLine.php b/src/Task/NewLine.php
index c18541c..f9e89dd 100644
--- a/src/Task/NewLine.php
+++ b/src/Task/NewLine.php
@@ -24,45 +24,49 @@ use Dotclear\Helper\Html\Form\{
     Para
 };
 use Dotclear\Plugin\improve\{
-    AbstractTask,
-    Core
+    Task,
+    Core,
+    TaskDescriptor
 };
 
 /**
  * Improve action module new line
  */
-class newline extends AbstractTask
+class NewLine extends Task
 {
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'newline',
+            name: __('Newlines'),
+            description: __('Replace bad and repetitive and empty newline by single newline in files'),
+            configurator: true,
+            types: ['plugin', 'theme'],
+            priority: 840
+        );
+    }
+
     protected function init(): bool
     {
-        $this->setProperties([
-            'id'           => 'newline',
-            'name'         => __('Newlines'),
-            'description'  => __('Replace bad and repetitive and empty newline by single newline in files'),
-            'priority'     => 840,
-            'configurator' => true,
-            'types'        => ['plugin', 'theme'],
-        ]);
-
         return true;
     }
 
     public function isConfigured(): bool
     {
-        return !empty($this->getSetting('extensions'));
+        return !empty($this->settings->get('extensions'));
     }
 
     public function configure($url): ?string
     {
         if (!empty($_POST['save']) && !empty($_POST['newline_extensions'])) {
-            $this->setSettings(
+            $this->settings->set(
                 'extensions',
                 Core::cleanExtensions($_POST['newline_extensions'])
             );
             $this->redirect($url);
         }
 
-        $ext = $this->getSetting('extensions');
+        $ext = $this->settings->get('extensions');
         if (!is_array($ext)) {
             $ext = [];
         }
@@ -81,7 +85,7 @@ class newline extends AbstractTask
 
     public function readFile(string &$content): ?bool
     {
-        $ext = $this->getSetting('extensions');
+        $ext = $this->settings->get('extensions');
         if (!is_array($ext) || !in_array($this->path_extension, $ext)) {
             return null;
         }
@@ -99,7 +103,7 @@ class newline extends AbstractTask
             )
         );
         if ($content != $clean) {
-            $this->setSuccess(__('Replace bad new lines'));
+            $this->success->add(__('Replace bad new lines'));
             $content = $clean;
         }
 
diff --git a/src/Task/PhpCsFixer.php b/src/Task/PhpCsFixer.php
index 3b1087d..a1dee17 100644
--- a/src/Task/PhpCsFixer.php
+++ b/src/Task/PhpCsFixer.php
@@ -29,15 +29,16 @@ use Dotclear\Helper\Html\Form\{
 };
 use Dotclear\Helper\Html\Html;
 use Dotclear\Plugin\improve\{
-    AbstractTask,
-    My
+    Task,
+    My,
+    TaskDescriptor
 };
 use Exception;
 
 /**
  * Improve action module PHP CS Fixer
  */
-class phpcsfixer extends AbstractTask
+class PhpCsFixer extends Task
 {
     /** @var array<int,string> Type of runtime errors */
     protected static $errors = [
@@ -59,17 +60,20 @@ class phpcsfixer extends AbstractTask
     /** @var string Settings PHP executable path */
     private $phpexe_path = '';
 
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'phpcsfixer',
+            name: __('PHP CS Fixer'),
+            description: __('Fix PSR coding style using Php CS Fixer'),
+            configurator: true,
+            types: ['plugin', 'theme'],
+            priority: 920
+        );
+    }
+
     protected function init(): bool
     {
-        $this->setProperties([
-            'id'           => 'phpcsfixer',
-            'name'         => __('PHP CS Fixer'),
-            'description'  => __('Fix PSR coding style using Php CS Fixer'),
-            'priority'     => 920,
-            'configurator' => true,
-            'types'        => ['plugin', 'theme'],
-        ]);
-
         $this->getPhpPath();
 
         if (null !== dcCore::app()->auth?->user_prefs) {
@@ -98,7 +102,7 @@ class phpcsfixer extends AbstractTask
     public function configure($url): ?string
     {
         if (!empty($_POST['save'])) {
-            $this->setSettings([
+            $this->settings->set([
                 'phpexe_path' => !empty($_POST['phpexe_path']) ? $_POST['phpexe_path'] : '',
             ]);
             $this->redirect($url);
@@ -142,18 +146,18 @@ class phpcsfixer extends AbstractTask
             exec($command, $output, $error);
             if (empty($output)) {
                 if (isset(self::$errors[$error])) {
-                    $this->setError(self::$errors[$error]);
+                    $this->error->add(self::$errors[$error]);
 
                     return false;
                 }
 
                 throw new Exception('oops');
             }
-            $this->setSuccess(sprintf('<pre>%s</pre>', implode('<br />', $output)));
+            $this->success->add(sprintf('<pre>%s</pre>', implode('<br />', $output)));
 
             return true;
         } catch (Exception $e) {
-            $this->setError(__('Failed to run php-cs-fixer'));
+            $this->error->add(__('Failed to run php-cs-fixer'));
 
             return false;
         }
@@ -164,7 +168,7 @@ class phpcsfixer extends AbstractTask
      */
     private function getPhpPath(): void
     {
-        $phpexe_path = $this->getSetting('phpexe_path');
+        $phpexe_path = $this->settings->get('phpexe_path');
         if (!is_string($phpexe_path)) {
             $phpexe_path = '';
         }
diff --git a/src/Task/PhpHeader.php b/src/Task/PhpHeader.php
index 9bc7070..9f33c76 100644
--- a/src/Task/PhpHeader.php
+++ b/src/Task/PhpHeader.php
@@ -27,13 +27,16 @@ use Dotclear\Helper\Html\Form\{
     Textarea
 };
 use Dotclear\Helper\Html\Html;
-use Dotclear\Plugin\improve\AbstractTask;
+use Dotclear\Plugin\improve\{
+    Task,
+    TaskDescriptor
+};
 use Exception;
 
 /**
  * Improve action module php header
  */
-class phpheader extends AbstractTask
+class PhpHeader extends Task
 {
     /** @var string Exemple of header */
     private static $exemple = <<<EOF
@@ -73,17 +76,20 @@ class phpheader extends AbstractTask
     /** @var string Settings bloc content */
     private $bloc_content = '';
 
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'phpheader',
+            name: __('PHP header'),
+            description: __('Add or remove phpdoc header bloc from php file'),
+            configurator: true,
+            types: ['plugin', 'theme'],
+            priority: 340
+        );
+    }
+
     protected function init(): bool
     {
-        $this->setProperties([
-            'id'           => 'phpheader',
-            'name'         => __('PHP header'),
-            'description'  => __('Add or remove phpdoc header bloc from php file'),
-            'priority'     => 340,
-            'configurator' => true,
-            'types'        => ['plugin', 'theme'],
-        ]);
-
         $this->action_bloc = [
             __('Do nothing')                       => 0,
             __('Add bloc if it does not exist')    => 'create',
@@ -92,7 +98,7 @@ class phpheader extends AbstractTask
             __('Remove existing bloc header')      => 'remove',
         ];
 
-        $bloc_content       = $this->getSetting('bloc_content');
+        $bloc_content       = $this->settings->get('bloc_content');
         $this->bloc_content = is_string($bloc_content) ? $bloc_content : '';
 
         return true;
@@ -100,13 +106,13 @@ class phpheader extends AbstractTask
 
     public function isConfigured(): bool
     {
-        return !empty($this->getSetting('bloc_action')) || !empty($this->getSetting('remove_old'));
+        return !empty($this->settings->get('bloc_action')) || !empty($this->settings->get('remove_old'));
     }
 
     public function configure($url): ?string
     {
         if (!empty($_POST['save'])) {
-            $this->setSettings([
+            $this->settings->set([
                 'bloc_action'     => !empty($_POST['bloc_action']) ? $_POST['bloc_action'] : '',
                 'bloc_content'    => !empty($_POST['bloc_content']) ? $_POST['bloc_content'] : '',
                 'remove_old'      => !empty($_POST['remove_old']),
@@ -120,16 +126,16 @@ class phpheader extends AbstractTask
                 // bloc_action
                 (new Para())->items([
                     (new Label(__('Action:'), Label::OUTSIDE_LABEL_BEFORE))->for('bloc_action'),
-                    (new Select('bloc_action'))->default($this->getSetting('bloc_action'))->items($this->action_bloc),
+                    (new Select('bloc_action'))->default($this->settings->get('bloc_action'))->items($this->action_bloc),
                 ]),
                 // remove_old
                 (new Para())->items([
-                    (new Checkbox('remove_old', !empty($this->getSetting('remove_old'))))->value(1),
+                    (new Checkbox('remove_old', !empty($this->settings->get('remove_old'))))->value(1),
                     (new Label(__('Remove old style bloc header (using #)'), Label::OUTSIDE_LABEL_AFTER))->for('remove_old')->class('classic'),
                 ]),
                 // exclude_locales
                 (new Para())->items([
-                    (new Checkbox('exclude_locales', !empty($this->getSetting('exclude_locales'))))->value(1),
+                    (new Checkbox('exclude_locales', !empty($this->settings->get('exclude_locales'))))->value(1),
                     (new Label(__('Do not add bloc to files from "locales" and "libs" folder'), Label::OUTSIDE_LABEL_AFTER))->for('exclude_locales')->class('classic'),
                 ]),
             ]),
@@ -156,7 +162,7 @@ class phpheader extends AbstractTask
     public function openModule(): ?bool
     {
         if (is_null(dcCore::app()->auth)) {
-            $this->setWarning(__('Auth is not set'));
+            $this->warning->add(__('Auth is not set'));
 
             return null;
         }
@@ -164,7 +170,7 @@ class phpheader extends AbstractTask
         $bloc = trim($this->bloc_content);
 
         if (empty($bloc)) {
-            $this->setWarning(__('bloc is empty'));
+            $this->waring->set(__('bloc is empty'));
 
             return null;
         }
@@ -194,11 +200,11 @@ class phpheader extends AbstractTask
                     (string) $bloc
                 )
             );
-            $this->setSuccess(__('Prepare header info'));
+            $this->success->add(__('Prepare header info'));
 
             return null;
         } catch (Exception $e) {
-            $this->setError(__('Failed to parse bloc'));
+            $this->error->add(__('Failed to parse bloc'));
 
             return null;
         }
@@ -208,9 +214,9 @@ class phpheader extends AbstractTask
     {
         $skipped         = $this->stop_scan;
         $this->stop_scan = false;
-        if (!empty($this->getSetting('exclude_locales')) && preg_match('/\/(locales|libs)(\/.*?|)$/', $this->path_full)) {
+        if (!empty($this->settings->get('exclude_locales')) && preg_match('/\/(locales|libs)(\/.*?|)$/', $this->path_full)) {
             if (!$skipped) {
-                $this->setSuccess(__('Skip directory'));
+                $this->success->add(__('Skip directory'));
             }
             $this->stop_scan = true;
         }
@@ -220,26 +226,26 @@ class phpheader extends AbstractTask
 
     public function readFile(&$content): ?bool
     {
-        if ($this->stop_scan || $this->path_extension != 'php' || $this->hasError()) {
+        if ($this->stop_scan || $this->path_extension != 'php' || !$this->error->empty()) {
             return null;
         }
 
-        if (!empty($this->getSetting('remove_old'))) {
+        if (!empty($this->settings->get('remove_old'))) {
             $content = $this->deleteOldBloc($content);
         }
-        if (empty($this->getSetting('bloc_action'))) {
+        if (empty($this->settings->get('bloc_action'))) {
             return null;
         }
         $clean = $this->deleteDocBloc($content);
-        if ($this->getSetting('bloc_action') == 'remove') {
+        if ($this->settings->get('bloc_action') == 'remove') {
             $content = $clean;
 
             return null;
         }
-        if ($content != $clean && $this->getSetting('bloc_action') == 'create') {
+        if ($content != $clean && $this->settings->get('bloc_action') == 'create') {
             return null;
         }
-        if ($content == $clean && $this->getSetting('bloc_action') == 'replace') {
+        if ($content == $clean && $this->settings->get('bloc_action') == 'replace') {
             return null;
         }
 
@@ -265,7 +271,7 @@ class phpheader extends AbstractTask
         );
         if ($count && $res) {
             $res = str_replace("\n * \n", "\n *\n", $res);
-            $this->setSuccess(__('Write new doc bloc content'));
+            $this->success->add(__('Write new doc bloc content'));
         }
 
         return (string) $res;
@@ -287,7 +293,7 @@ class phpheader extends AbstractTask
             $count
         );
         if ($count) {
-            $this->setSuccess(__('Delete old doc bloc content'));
+            $this->success->add(__('Delete old doc bloc content'));
         }
 
         return (string) $res;
@@ -309,7 +315,7 @@ class phpheader extends AbstractTask
             $count
         );
         if ($count) {
-            $this->setSuccess(__('Delete old style bloc content'));
+            $this->success->add(__('Delete old style bloc content'));
         }
 
         return (string) $res;
diff --git a/src/Task/PhpStan.php b/src/Task/PhpStan.php
index 3309ccc..f13c0c4 100644
--- a/src/Task/PhpStan.php
+++ b/src/Task/PhpStan.php
@@ -31,15 +31,16 @@ use Dotclear\Helper\Html\Form\{
 };
 use Dotclear\Helper\Html\Html;
 use Dotclear\Plugin\improve\{
-    AbstractTask,
-    My
+    Task,
+    My,
+    TaskDescriptor
 };
 use Exception;
 
 /**
  * Improve action module PHPStan
  */
-class phpstan extends AbstractTask
+class PhpStan extends Task
 {
     /** @var boolean User pref to use colored synthax */
     protected static $user_ui_colorsyntax = false;
@@ -56,23 +57,26 @@ class phpstan extends AbstractTask
     /** @var string Settings PHP executable path */
     private $phpexe_path = '';
 
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'phpstan',
+            name: __('PHPStan'),
+            description: __('Analyse php code using PHPStan'),
+            configurator: true,
+            types: ['plugin'],
+            priority: 910
+        );
+    }
+
     protected function init(): bool
     {
-        $this->setProperties([
-            'id'           => 'phpstan',
-            'name'         => __('PHPStan'),
-            'description'  => __('Analyse php code using PHPStan'),
-            'priority'     => 910,
-            'configurator' => true,
-            'types'        => ['plugin'],
-        ]);
-
         $this->getPhpPath();
 
-        $run_level       = $this->getSetting('run_level');
+        $run_level       = $this->settings->get('run_level');
         $this->run_level = is_int($run_level) ? $run_level : 5;
 
-        $ignored_vars       = $this->getSetting('ignored_vars');
+        $ignored_vars       = $this->settings->get('ignored_vars');
         $this->ignored_vars = is_string($ignored_vars) ? $ignored_vars : '';
 
         if (null !== dcCore::app()->auth?->user_prefs) {
@@ -101,7 +105,7 @@ class phpstan extends AbstractTask
     public function configure($url): ?string
     {
         if (!empty($_POST['save'])) {
-            $this->setSettings([
+            $this->settings->set([
                 'phpexe_path'     => (!empty($_POST['phpexe_path']) ? $_POST['phpexe_path'] : ''),
                 'run_level'       => (int) $_POST['run_level'],
                 'ignored_vars'    => (!empty($_POST['ignored_vars']) ? $_POST['ignored_vars'] : ''),
@@ -140,19 +144,19 @@ class phpstan extends AbstractTask
                 )->class('form-note'),
                 // ignored_default
                 (new Para())->items([
-                    (new Checkbox('ignored_default', !empty($this->getSetting('ignored_default'))))->value(1),
+                    (new Checkbox('ignored_default', !empty($this->settings->get('ignored_default'))))->value(1),
                     (new Label(__('Do not use rules from default ignored errors list.'), Label::OUTSIDE_LABEL_AFTER))->for('ignored_default')->class('classic'),
                 ]),
                 (new Note())->text(__('See ignored errors from configuration file below.'))->class('form-note'),
                 // split_report
                 (new Para())->items([
-                    (new Checkbox('split_report', !empty($this->getSetting('split_report'))))->value(1),
+                    (new Checkbox('split_report', !empty($this->settings->get('split_report'))))->value(1),
                     (new Label(__('Split report by file rather than all in the end.'), Label::OUTSIDE_LABEL_AFTER))->for('split_report')->class('classic'),
                 ]),
                 (new Note())->text(__('Enable this can cause timeout.'))->class('form-note'),
                 // clear_cache
                 (new Para())->items([
-                    (new Checkbox('clear_cache', !empty($this->getSetting('clear_cache'))))->value(1),
+                    (new Checkbox('clear_cache', !empty($this->settings->get('clear_cache'))))->value(1),
                     (new Label(__('Clear result cache before each analizes.'), Label::OUTSIDE_LABEL_AFTER))->for('clear_cache')->class('classic'),
                 ]),
                 (new Note())->text(__('Enable this can cause timeout.'))->class('form-note'),
@@ -174,7 +178,7 @@ class phpstan extends AbstractTask
     public function openModule(): bool
     {
         if (!$this->writeConf()) {
-            $this->setError(__('Failed to write phpstan configuration'));
+            $this->error->add(__('Failed to write phpstan configuration'));
 
             return false;
         }
@@ -184,27 +188,27 @@ class phpstan extends AbstractTask
 
     public function closeFile(): ?bool
     {
-        if (!$this->getSetting('split_report')
+        if (!$this->settings->get('split_report')
             || !in_array($this->path_extension, ['php', 'in'])
         ) {
             return null;
         }
 
-        $clear = $this->getSetting('clear_cache') ? $this->execClear($this->path_full) : true;
+        $clear = $this->settings->get('clear_cache') ? $this->execClear($this->path_full) : true;
 
         return $clear && $this->execFixer($this->path_full);
     }
 
     public function closeModule(): ?bool
     {
-        if ($this->getSetting('split_report')) {
+        if ($this->settings->get('split_report')) {
             return null;
         }
-        if ($this->hasError()) {
+        if (!$this->error->empty()) {
             return false;
         }
 
-        $clear = $this->getSetting('clear_cache') ? $this->execClear() : true;
+        $clear = $this->settings->get('clear_cache') ? $this->execClear() : true;
 
         return $clear && $this->execFixer();
     }
@@ -245,14 +249,14 @@ class phpstan extends AbstractTask
                 throw new Exception('oops');
             }
             if (count($output) < 4) {
-                $this->setSuccess($from_clear ? __('Cache cleared') : __('No errors found'));
+                $this->success->add($from_clear ? __('Cache cleared') : __('No errors found'));
             } else {
-                $this->setWarning(sprintf('<pre>%s</pre>', implode('<br />', $output)));
+                $this->warning->add(sprintf('<pre>%s</pre>', implode('<br />', $output)));
             }
 
             return true;
         } catch (Exception $e) {
-            $this->setError(__('Failed to run phpstan'));
+            $this->error->add(__('Failed to run phpstan'));
 
             return false;
         }
@@ -263,7 +267,7 @@ class phpstan extends AbstractTask
      */
     private function getPhpPath(): void
     {
-        $phpexe_path = $this->getSetting('phpexe_path');
+        $phpexe_path = $this->settings->get('phpexe_path');
         if (!is_string($phpexe_path)) {
             $phpexe_path = '';
         }
@@ -279,7 +283,7 @@ class phpstan extends AbstractTask
 
     private function writeConf(): bool
     {
-        $full    = $this->getSetting('ignored_default') ? '' : 'full.';
+        $full    = $this->settings->get('ignored_default') ? '' : 'full.';
         $content = str_replace(
             [
                 '%LEVEL%',
diff --git a/src/Task/Po2Php.php b/src/Task/Po2Php.php
index 6d2b2d4..7f606a8 100644
--- a/src/Task/Po2Php.php
+++ b/src/Task/Po2Php.php
@@ -15,12 +15,15 @@ declare(strict_types=1);
 namespace Dotclear\Plugin\improve\Task;
 
 use Dotclear\Helper\L10n;
-use Dotclear\Plugin\improve\AbstractTask;
+use Dotclear\Plugin\improve\{
+    Task,
+    TaskDescriptor
+};
 
 /**
  * Improve action module dcstore.xml
  */
-class po2php extends AbstractTask
+class Po2Php extends Task
 {
     /** @var string License bloc */
     private $license = <<<EOF
@@ -32,16 +35,20 @@ class po2php extends AbstractTask
          */
         EOF;
 
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'po2php',
+            name: __('Translation files'),
+            description: __('Compile existing translation .po files to fresh .lang.php files'),
+            configurator: false,
+            types: ['plugin', 'theme'],
+            priority: 310
+        );
+    }
+
     protected function init(): bool
     {
-        $this->setProperties([
-            'id'          => 'po2php',
-            'name'        => __('Translation files'),
-            'description' => __('Compile existing translation .po files to fresh .lang.php files'),
-            'priority'    => 310,
-            'types'       => ['plugin', 'theme'],
-        ]);
-
         return true;
     }
 
@@ -57,9 +64,9 @@ class po2php extends AbstractTask
         }
 
         if (L10n::generatePhpFileFromPo(substr($this->path_full, 0, -3), $this->license)) {
-            $this->setSuccess(__('Compile .po file to .lang.php'));
+            $this->success->add(__('Compile .po file to .lang.php'));
         } else {
-            $this->setError(__('Failed to compile .po file'));
+            $this->error->add(__('Failed to compile .po file'));
         }
 
         return true;
diff --git a/src/Task/Tab.php b/src/Task/Tab.php
index 6158040..c3536b9 100644
--- a/src/Task/Tab.php
+++ b/src/Task/Tab.php
@@ -14,23 +14,30 @@ declare(strict_types=1);
 
 namespace Dotclear\Plugin\improve\Task;
 
-use Dotclear\Plugin\improve\AbstractTask;
+use Dotclear\Plugin\improve\{
+    Task,
+    TaskDescriptor
+};
 
 /**
  * Improve action module tab
  */
-class tab extends AbstractTask
+class Tab extends Task
 {
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'tab',
+            name: __('Tabulations'),
+            description: __('Replace tabulation by four space in php files'),
+            configurator: false,
+            types: ['plugin', 'theme'],
+            priority: 820
+        );
+    }
+
     protected function init(): bool
     {
-        $this->setProperties([
-            'id'          => 'tab',
-            'name'        => __('Tabulations'),
-            'description' => __('Replace tabulation by four space in php files'),
-            'priority'    => 820,
-            'types'       => ['plugin', 'theme'],
-        ]);
-
         return true;
     }
 
@@ -41,7 +48,7 @@ class tab extends AbstractTask
         }
         $clean = preg_replace('/(\t)/', '    ', $content);// . "\n";
         if ($content != $clean) {
-            $this->setSuccess(__('Replace tabulation by spaces'));
+            $this->success->add(__('Replace tabulation by spaces'));
             $content = $clean;
         }
 
diff --git a/src/Task/Zip.php b/src/Task/Zip.php
index 448618c..af4f4b3 100644
--- a/src/Task/Zip.php
+++ b/src/Task/Zip.php
@@ -29,12 +29,15 @@ use Dotclear\Helper\Html\Form\{
     Note,
     Para
 };
-use Dotclear\Plugin\improve\AbstractTask;
+use Dotclear\Plugin\improve\{
+    Task,
+    TaskDescriptor
+};
 
 /**
  * Improve action module zip
  */
-class zip extends AbstractTask
+class Zip extends Task
 {
     /** @var array List of excluded file pattern */
     public static $exclude = [
@@ -68,26 +71,29 @@ class zip extends AbstractTask
     /** @var string Settings Second package filename */
     private $secondpack_filename = '';
 
+    protected function getProperties(): TaskDescriptor
+    {
+        return new TaskDescriptor(
+            id: 'zip',
+            name: __('Zip module'),
+            description: __('Compress module into a ready to install package'),
+            configurator: true,
+            types: ['plugin', 'theme'],
+            priority: 980
+        );
+    }
+
     protected function init(): bool
     {
         require_once implode(DIRECTORY_SEPARATOR, [__DIR__, 'zip', 'Zip.php']);
 
-        $this->setProperties([
-            'id'           => 'zip',
-            'name'         => __('Zip module'),
-            'description'  => __('Compress module into a ready to install package'),
-            'priority'     => 980,
-            'configurator' => true,
-            'types'        => ['plugin', 'theme'],
-        ]);
-
-        $pack_excludefiles       = $this->getSetting('pack_excludefiles');
+        $pack_excludefiles       = $this->settings->get('pack_excludefiles');
         $this->pack_excludefiles = is_string($pack_excludefiles) ? $pack_excludefiles : '';
 
-        $pack_filename       = $this->getSetting('pack_filename');
+        $pack_filename       = $this->settings->get('pack_filename');
         $this->pack_filename = is_string($pack_filename) ? $pack_filename : '';
 
-        $secondpack_filename       = $this->getSetting('secondpack_filename');
+        $secondpack_filename       = $this->settings->get('secondpack_filename');
         $this->secondpack_filename = is_string($secondpack_filename) ? $secondpack_filename : '';
 
         return true;
@@ -95,13 +101,13 @@ class zip extends AbstractTask
 
     public function isConfigured(): bool
     {
-        return !empty($this->getSetting('pack_repository')) && !empty($this->getSetting('pack_filename'));
+        return !empty($this->settings->get('pack_repository')) && !empty($this->settings->get('pack_filename'));
     }
 
     public function configure($url): ?string
     {
         if (!empty($_POST['save'])) {
-            $this->setSettings([
+            $this->settings->set([
                 'pack_repository'     => !empty($_POST['pack_repository']) ? $_POST['pack_repository'] : '',
                 'pack_filename'       => !empty($_POST['pack_filename']) ? $_POST['pack_filename'] : '',
                 'secondpack_filename' => !empty($_POST['secondpack_filename']) ? $_POST['secondpack_filename'] : '',
@@ -117,7 +123,7 @@ class zip extends AbstractTask
                 // pack_repository
                 (new Para())->items([
                     (new Label(__('Path to repository:'), Label::OUTSIDE_LABEL_BEFORE))->for('pack_repository'),
-                    (new Input('pack_repository'))->size(65)->maxlenght(255)->value($this->getSetting('pack_repository')),
+                    (new Input('pack_repository'))->size(65)->maxlenght(255)->value($this->settings->get('pack_repository')),
                 ]),
                 (new Note())->text(sprintf(
                     __('Preconization: %s'),
@@ -129,18 +135,18 @@ class zip extends AbstractTask
                 // pack_filename
                 (new Para())->items([
                     (new Label(__('Name of exported package:'), Label::OUTSIDE_LABEL_BEFORE))->for('pack_filename'),
-                    (new Input('pack_filename'))->size(65)->maxlenght(255)->value($this->getSetting('pack_filename')),
+                    (new Input('pack_filename'))->size(65)->maxlenght(255)->value($this->settings->get('pack_filename')),
                 ]),
                 (new Note())->text(sprintf(__('Preconization: %s'), '%type%-%id%'))->class('form-note'),
                 // secondpack_filename
                 (new Para())->items([
                     (new Label(__('Name of second exported package:'), Label::OUTSIDE_LABEL_BEFORE))->for('secondpack_filename'),
-                    (new Input('secondpack_filename'))->size(65)->maxlenght(255)->value($this->getSetting('secondpack_filename')),
+                    (new Input('secondpack_filename'))->size(65)->maxlenght(255)->value($this->settings->get('secondpack_filename')),
                 ]),
                 (new Note())->text(sprintf(__('Preconization: %s'), '%type%-%id%-%version%'))->class('form-note'),
                 // pack_overwrite
                 (new Para())->items([
-                    (new Checkbox('pack_overwrite', !empty($this->getSetting('pack_overwrite'))))->value(1),
+                    (new Checkbox('pack_overwrite', !empty($this->settings->get('pack_overwrite'))))->value(1),
                     (new Label(__('Overwrite existing languages'), Label::OUTSIDE_LABEL_AFTER))->for('pack_overwrite')->class('classic'),
                 ]),
             ]),
@@ -148,12 +154,12 @@ class zip extends AbstractTask
                 // pack_excludefiles
                 (new Para())->items([
                     (new Label(__('Extra files to exclude from package:'), Label::OUTSIDE_LABEL_BEFORE))->for('pack_excludefiles'),
-                    (new Input('pack_excludefiles'))->size(65)->maxlenght(255)->value($this->getSetting('pack_excludefiles')),
+                    (new Input('pack_excludefiles'))->size(65)->maxlenght(255)->value($this->settings->get('pack_excludefiles')),
                 ]),
                 (new Note())->text(sprintf(__('By default all these files are always removed from packages : %s'), implode(', ', self::$exclude)))->class('form-note'),
                 // pack_nocomment
                 (new Para())->items([
-                    (new Checkbox('pack_nocomment', !empty($this->getSetting('pack_nocomment'))))->value(1),
+                    (new Checkbox('pack_nocomment', !empty($this->settings->get('pack_nocomment'))))->value(1),
                     (new Label(__('Remove comments from files'), Label::OUTSIDE_LABEL_AFTER))->for('pack_nocomment')->class('classic'),
                 ]),
             ]),
@@ -166,15 +172,15 @@ class zip extends AbstractTask
             self::$exclude,
             explode(',', $this->pack_excludefiles)
         );
-        $this->setSuccess(sprintf(__('Prepare excluded files "%s"'), implode(', ', $exclude)));
-        if (!empty($this->getSetting('pack_nocomment'))) {
+        $this->success->add(sprintf(__('Prepare excluded files "%s"'), implode(', ', $exclude)));
+        if (!empty($this->settings->get('pack_nocomment'))) {
             zip\Zip::$remove_comment = true;
-            $this->setSuccess(__('Prepare comment removal'));
+            $this->success->add(__('Prepare comment removal'));
         }
-        if (!empty($this->getSetting('pack_filename'))) {
+        if (!empty($this->settings->get('pack_filename'))) {
             $this->zipModule($this->pack_filename, $exclude);
         }
-        if (!empty($this->getSetting('secondpack_filename'))) {
+        if (!empty($this->settings->get('secondpack_filename'))) {
             $this->zipModule($this->secondpack_filename, $exclude);
         }
 
@@ -198,14 +204,14 @@ class zip extends AbstractTask
         foreach ($parts as $i => $part) {
             $parts[$i] = Files::tidyFileName($part);
         }
-        $path = $this->getSetting('pack_repository') . '/' . implode('/', $parts) . '.zip';
-        if (file_exists($path) && empty($this->getSetting('pack_overwrite'))) {
-            $this->setWarning(__('Destination filename already exists'));
+        $path = $this->settings->get('pack_repository') . '/' . implode('/', $parts) . '.zip';
+        if (file_exists($path) && empty($this->settings->get('pack_overwrite'))) {
+            $this->warning->add(__('Destination filename already exists'));
 
             return;
         }
         if (!is_dir(dirname($path)) || !is_writable(dirname($path))) {
-            $this->setError(__('Destination path is not writable'));
+            $this->error->add(__('Destination path is not writable'));
 
             return;
         }
@@ -229,6 +235,6 @@ class zip extends AbstractTask
         $zip->write();
         unset($zip);
 
-        $this->setSuccess(sprintf(__('Zip module into "%s"'), $path));
+        $this->success->add(sprintf(__('Zip module into "%s"'), $path));
     }
 }
diff --git a/src/TaskDescriptor.php b/src/TaskDescriptor.php
new file mode 100644
index 0000000..8ebb9ff
--- /dev/null
+++ b/src/TaskDescriptor.php
@@ -0,0 +1,55 @@
+<?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;
+
+use dcCore;
+
+/**
+ * Task description.
+ */
+class TaskDescriptor
+{
+    /** @var    string  The priority overload settings prefix  */
+    public const PREFIX = 'priority_';
+
+    /** @var    int     $priority   The task priority */
+    public readonly int $priority;
+
+    /**
+     * Constructor sets all properties
+     *
+     * @param   string  $id             The task ID
+     * @param   string  $name           The task translated name
+     * @param   string  $description    The task short descripton
+     * @param   bool    $configurator   The task has configuration form
+     * @param   array   $types          The task supported modules types
+     * @param   int     $priority   The task default priority
+     */
+    public function __construct(
+        public readonly string $id,
+        public readonly string $name,
+        public readonly string $description,
+        public readonly array $types,
+        public readonly bool $configurator,
+        int $priority = 500
+    ) {
+        // Overload task priority from settings
+        if (!is_null(dcCore::app()->blog) && 1 < ($p = (int) dcCore::app()->blog?->settings->get(My::id())->get(self::PREFIX . $this->id))) {
+            $this->priority = $p;
+        } else {
+            $this->priority = abs($priority);
+        }
+    }
+}
diff --git a/src/TaskMessages.php b/src/TaskMessages.php
new file mode 100644
index 0000000..3487cce
--- /dev/null
+++ b/src/TaskMessages.php
@@ -0,0 +1,79 @@
+<?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;
+
+/**
+ * Task messages group.
+ */
+class TaskMessages
+{
+    /** @ var   array<string,array>     $stack  The messages by path stack */
+    private array $stack;
+
+    /** @ var   string  $path  The current path */
+    private string $path = 'root';
+
+    /**
+     * Set current working path.
+     *
+     * @param   string  $path    The path
+     */
+    public function path(string $path = 'root'): void
+    {
+        $this->path = $path;
+    }
+
+    /**
+     * Check if there are messages.
+     *
+     * return   bool    True if not empty
+     */
+    public function empty(): bool
+    {
+        return empty($this->stack);
+    }
+
+    /**
+     * Add a message for current path.
+     *
+     * @param   string  $message    The message
+     */
+    public function add(string $message): void
+    {
+        $this->stack[$this->path][] = $message;
+    }
+
+    /**
+     * Get a path messages.
+     *
+     * @param   string  The path
+     *
+     * @return  array   The messages
+     */
+    public function get(string $path): array
+    {
+        return $this->stack[$path] ?? [];
+    }
+
+    /**
+     * Get all messages
+     *
+     * @return  array<string,array>     The messages stack
+     */
+    public function dump(): array
+    {
+        return $this->stack;
+    }
+}
diff --git a/src/TaskSettings.php b/src/TaskSettings.php
new file mode 100644
index 0000000..2ecc9e5
--- /dev/null
+++ b/src/TaskSettings.php
@@ -0,0 +1,90 @@
+<?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;
+
+use dcCore;
+
+/**
+ * Task settings management.
+ */
+class TaskSettings
+{
+    /** @var    string  The setting prefix  */
+    public const PREFIX = 'settings_';
+
+    /** @ var   array<string,mixed>     $stack  The settings stack */
+    private array $stack = [];
+
+    /**
+     * Constructor sets settings suffix.
+     *
+     * @param   string  $suffit     The settings suffix (ie taks id)
+     */
+    public function __construct(
+        private string $suffix
+    ) {
+        if (is_null(dcCore::app()->blog)) {
+            throw new Exception(__('Blog is not set'));
+        }
+
+        if (null !== ($settings = dcCore::app()->blog->settings->get(My::id())->get(self::PREFIX . $this->suffix))) {
+            $settings    = json_decode($settings, true);
+            $this->stack = is_array($settings) ? $settings : [];
+        }
+    }
+
+    /**
+     * Get a task setting.
+     *
+     * @param   string  $key    The setting ID
+     *
+     * @return  mixed   The setting value
+     */
+    public function get(string $key)
+    {
+        return $this->stack[$key] ?? null;
+    }
+
+    /**
+     * Set one or more setting(s).
+     *
+     * @param   mixed   $settings     one or more settings
+     * @param   mixed   $value        value for a single setting
+     */
+    public function set($settings, $value = null): void
+    {
+        foreach (is_array($settings) ? $settings : [$settings => $value] as $k => $v) {
+            $this->stack[$k] = $v;
+        }
+    }
+
+    /**
+     * Save settings.
+     */
+    public function save()
+    {
+        if (!is_null(dcCore::app()->blog)) {
+            dcCore::app()->blog->settings->get(My::id())->put(
+                self::PREFIX . $this->suffix,
+                json_encode($this->stack),
+                'string',
+                null,
+                true,
+                true
+            );
+            dcCore::app()->blog->triggerBlog();
+        }
+    }
+}
diff --git a/src/Tasks.php b/src/Tasks.php
index c78f9ad..d9db796 100644
--- a/src/Tasks.php
+++ b/src/Tasks.php
@@ -15,14 +15,13 @@ declare(strict_types=1);
 namespace Dotclear\Plugin\improve;
 
 use dcCore;
-use Exception;
 
 /**
  * The Tasks stack.
  */
 class Tasks
 {
-    /** @var    array<string,AbstractTask>   $stack   The tasks stack */
+    /** @var    array<string,Task>   $stack   The tasks stack */
     private array $stack = [];
 
     /**
@@ -33,21 +32,21 @@ class Tasks
         # --BEHAVIOR-- improveTaskAdd: Tasks
         dcCore::app()->callBehavior('improveTaskAdd', $this);
 
-        uasort($this->stack, fn ($a, $b) => $a->name() <=> $b->name());
-        uasort($this->stack, fn ($a, $b) => $a->priority() <=> $b->priority());
+        uasort($this->stack, fn ($a, $b) => $a->properties->name <=> $b->properties->name);
+        uasort($this->stack, fn ($a, $b) => $a->properties->priority <=> $b->properties->priority);
     }
 
     /**
      * Add an task.
      *
-     * @param   AbstractTask    $task   The task instance
+     * @param   Task    $task   The task instance
      *
      * @return  Tasks   Self instance
      */
-    public function add(AbstractTask $task): Tasks
+    public function add(Task $task): Tasks
     {
-        if (!isset($this->stack[$task->id()])) {
-            $this->stack[$task->id()] = $task;
+        if (!isset($this->stack[$task->properties->id])) {
+            $this->stack[$task->properties->id] = $task;
         }
 
         return $this;
@@ -56,7 +55,7 @@ class Tasks
     /**
      * Get all tasks.
      *
-     * @return  array<string,AbstractTask>  The tasks stack
+     * @return  array<string,Task>  The tasks stack
      */
     public function dump(): array
     {
@@ -68,9 +67,9 @@ class Tasks
      *
      * @param   string  $id     The task id
      *
-     * @return  null|AbstractTask   The task
+     * @return  null|Task   The task
      */
-    public function get(string $id): ?AbstractTask
+    public function get(string $id): ?Task
     {
         return $this->stack[$id] ?? null;
     }