diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..fa06938
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,97 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+This is ModuleUsersUI, a MikoPBX module that provides user rights management and access control functionality. It allows multi-user access to MikoPBX with role-based permissions and includes LDAP/AD authentication support.
+
+## Development Commands
+
+### Code Quality
+- Use `phpstan` to check code quality after creating or modifying PHP files
+- PHP version requirement: ^7.4 (platform version: 7.4.0)
+
+### JavaScript Build Process
+- Source JS files are in `public/assets/js/src/`
+- Compiled JS files are in `public/assets/js/`
+- Use Babel for JS compilation: `/Users/nb/PhpstormProjects/mikopbx/MikoPBXUtils/node_modules/.bin/babel "$INPUT_FILE" --out-dir "$OUTPUT_DIR" --source-maps inline --presets airbnb`
+
+### Dependencies
+- Run `composer install` to install PHP dependencies
+- Main dependency: `directorytree/ldaprecord` for LDAP functionality
+
+## Architecture Overview
+
+### Core Components
+1. **Module Structure** - Standard MikoPBX module following Phalcon framework patterns
+2. **Access Control System** - Multi-layered ACL implementation with role-based permissions
+3. **Authentication** - Dual authentication: local credentials and LDAP/AD integration
+4. **User Interface** - Tabbed interface using Semantic UI with Volt templating
+
+### Key Directories
+- `App/` - Main application logic (Controllers, Forms, Views, Providers)
+- `Lib/` - Core libraries and ACL system
+- `Models/` - Phalcon ORM models for database entities
+- `Setup/` - Module installation and configuration
+- `Messages/` - Internationalization files
+- `public/assets/` - Frontend assets (CSS, JS, images)
+
+### Database Models
+- `AccessGroups` - User access groups with permissions
+- `AccessGroupsRights` - Granular rights assignment to groups
+- `AccessGroupCDRFilter` - CDR filtering rules per group
+- `UsersCredentials` - User authentication credentials
+- `LdapConfig` - LDAP/AD server configuration
+
+### Controllers Architecture
+- `ModuleUsersUIBaseController` - Base controller with common functionality
+- `ModuleUsersUIController` - Main module interface (groups, users, LDAP tabs)
+- `AccessGroupsController` - Access group management
+- `AccessGroupsRightsController` - Rights assignment
+- `AccessGroupCDRFilterController` - CDR filtering configuration
+- `UsersCredentialsController` - User credential management
+- `LdapConfigController` - LDAP configuration
+
+### ACL System
+The module implements a sophisticated ACL system:
+- `UsersUIACL` - Main ACL modifier that integrates with MikoPBX core ACL
+- `CoreACL` and various `Module*ACL` classes - Define permissions for different MikoPBX modules
+- Role-based access with prefix: `Constants::MODULE_ROLE_PREFIX`
+- Dynamic permission assignment based on access group configuration
+
+### Authentication Flow
+1. `UsersUIAuthenticator` - Handles login authentication
+2. Supports both local password and LDAP authentication
+3. `UsersUILdapAuth` - LDAP authentication implementation
+4. Session management integrated with MikoPBX core
+
+### Frontend Architecture
+- Uses Semantic UI framework for styling
+- JavaScript modules for each tab functionality:
+  - `module-users-ui-index.js` - Main module initialization
+  - `module-users-ui-index-users.js` - Users tab functionality
+  - `module-users-ui-index-ldap.js` - LDAP configuration tab
+  - `module-users-ui-modify-ag.js` - Access group modification
+  - `module-users-ui-extensions-modify.js` - Extension modifications
+- Volt templating engine for server-side rendering
+
+### Configuration
+- `module.json` - Module metadata and release settings
+- `composer.json` - PHP dependencies and autoloading (PSR-4)
+- License: GPL-3.0-or-later
+
+## Development Patterns
+- Follow MikoPBX module development standards
+- Use Phalcon ORM for database operations
+- Implement proper ACL checks in all controllers
+- Maintain separation between frontend source and compiled assets
+- Use dependency injection container for service registration
+- Follow PSR-4 autoloading standards with namespace `Modules\ModuleUsersUI\`
+
+## Key Files to Understand
+- `App/Module.php` - Main module definition and service registration
+- `Setup/PbxExtensionSetup.php` - Module installation and sidebar integration
+- `Lib/UsersUIACL.php` - Core ACL modification logic
+- `Lib/UsersUIAuthenticator.php` - Authentication handler
+- `App/Controllers/ModuleUsersUIController.php` - Main controller
\ No newline at end of file
diff --git a/Lib/AnswerStructure.php b/Lib/AnswerStructure.php
new file mode 100644
index 0000000..712b75e
--- /dev/null
+++ b/Lib/AnswerStructure.php
@@ -0,0 +1,102 @@
+<?php
+/*
+ * MikoPBX - free phone system for small business
+ * Copyright © 2017-2023 Alexey Portnov and Nikolay Beketov
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace Modules\ModuleUsersUI\Lib;
+
+
+use MikoPBX\PBXCoreREST\Lib\PBXApiResult;
+
+/**
+ * Class AnswerStructure
+ *
+ * @package Modules\ModuleUsersUI\Lib
+ *
+ */
+class AnswerStructure
+{
+    /**
+     * Request result
+     *
+     * @var bool
+     */
+    public bool $success = false;
+
+    /**
+     * Array of result fields
+     *
+     * @var array
+     */
+    public array $data;
+
+    /**
+     * Error messages, description of failure
+     *
+     * @var array
+     */
+    public array $messages;
+
+    /**
+     * AnswerStructure constructor.
+     *
+     * @param PBXApiResult|null $res The PBXApiResult object to initialize from (optional).
+     */
+    public function __construct(PBXApiResult $res = null)
+    {
+        // Initialize default values
+        $this->success = false;
+        $this->data = [];
+        $this->messages = [];
+
+        // If PBXApiResult is provided, copy attributes
+        if ($res) {
+            $this->copyAttributesFrom($res);
+        }
+    }
+
+
+    /**
+     * Prepare structured result
+     *
+     * @return array The structured result as an array
+     */
+    public function getResult(): array
+    {
+        return [
+            'result'    => $this->success,
+            'data'      => $this->data,
+            'messages'  => $this->messages,
+        ];
+    }
+
+    /**
+     * Copies attributes from a PBXApiResult to this AnswerStructure.
+     *
+     * @param PBXApiResult $res The PBXApiResult object to copy attributes from.
+     */
+    private function copyAttributesFrom(PBXApiResult $res): void
+    {
+        // Iterate through the attributes of this object and copy values from PBXApiResult
+        foreach ($this as $attribute => $value) {
+            if (!empty($res->$attribute)) {
+                $this->$attribute = $res->$attribute;
+            }
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/Lib/UsersUILdapAuth.php b/Lib/UsersUILdapAuth.php
index 2de449e..0ba065d 100644
--- a/Lib/UsersUILdapAuth.php
+++ b/Lib/UsersUILdapAuth.php
@@ -24,6 +24,7 @@
 use LdapRecord\Container;
 use MikoPBX\Common\Handlers\CriticalErrorsHandler;
 use MikoPBX\Common\Providers\LoggerAuthProvider;
+use Modules\ModuleUsersUI\Lib\AnswerStructure;
 use Phalcon\Di\Injectable;
 
 include_once __DIR__ . '/../vendor/autoload.php';