Clarify Moodle compatibility range (4.2 - 5.2) and editor modes in README

README.md

@@ -2,18 +2,38 @@
 
 [![Preview in Moodle Playground](https://raw.githubusercontent.com/ateeducacion/action-moodle-playground-pr-preview/refs/heads/main/assets/playground-preview-button.svg)](https://moodle-playground.com/?blueprint-url=https://raw.githubusercontent.com/exelearning/mod_exescorm/refs/heads/main/blueprint.json)
 
-Activity-type module to create and edit SCORM packages with eXeLearning (online).
+Activity-type module to create and edit SCORM packages with eXeLearning inside Moodle.
 
-You need the eXeLearning online version installed (ws28 or higher) and access to its configuration files to run
-this module.
+The plugin can run in either of two editing modes, selected by the site administrator under _Site administration > Plugins > Activity modules > eXeLearning (SCORM) > Editor mode_:
+
+* **eXeLearning Online (remote server, default)** — connects to an existing eXeLearning Online instance using its base URL and signing key. This is the default mode shipped by the plugin and the recommended choice when an organisation operates a shared eXeLearning Online deployment.
+* **Embedded editor (integrated)** — a self-contained build of the eXeLearning editor ships with the plugin (or can be installed by an administrator from the plugin settings page). It runs directly inside Moodle, so **no external server is required**.
+
+Both modes produce the same kind of activity; pick the one that best fits your infrastructure.
 
 ## Compatibility
 
-This plugin version is tested for:
+This plugin works on every supported Moodle release from **Moodle 4.2** (the minimum required, see `version.php`: `$plugin->requires = 2023042400`) up to the latest Moodle 5.2.x stable. It is verified on the LTS branches commonly deployed in production:
+
+| Moodle branch         | Status                                |
+| --------------------- | ------------------------------------- |
+| 4.2.x                 | Supported (minimum required version)  |
+| 4.3.x                 | Supported                             |
+| 4.4.x                 | Supported                             |
+| 4.5.x (LTS)           | Supported                             |
+| 5.0.x                 | Supported                             |
+| 5.1.x                 | Supported                             |
+| 5.2.x (latest stable) | Supported                             |
+
+Older Moodle releases (3.x, 4.0 and 4.1) are **not** supported. The plugin is expected to keep working with newer Moodle releases as they appear; if you find an incompatibility please open an issue at <https://github.com/exelearning/mod_exescorm/issues>.
 
-* Moodle 4.1.3+ (Build: 20230526)
-* Moodle 3.11.10+ (Build: 20221007)
-* Moodle 3.9.2+ (Build: 20200929)
+### Requirements
+
+* **Moodle**: 4.2 or later (see table above).
+* **PHP**: any version required by the Moodle release in use — the plugin does not add extra PHP requirements on top of Moodle's own.
+* **Database**: any database supported by the Moodle release in use.
+* **Browser**: any modern, evergreen browser with JavaScript enabled.
+* **Required for _eXeLearning Online_ mode (default)**: an eXeLearning Online instance and access to its configuration files / signing key. Not needed when running the plugin in _Embedded editor_ mode.
 
 ## Installation
 
@@ -81,9 +101,14 @@ The admin-installed version takes priority over the bundled one. If neither sour
 
 For development setup, build instructions, and contributing guidelines, see [DEVELOPMENT.md](DEVELOPMENT.md).
 
+## Support
+
+Please report bugs and feature requests on the GitHub issue tracker:
+<https://github.com/exelearning/mod_exescorm/issues>
+
 ## About
 
-Copyright 2023:
+Copyright 2023-2026:
 Centro Nacional de Desarrollo Curricular en Sistemas no Propietarios (CeDeC) /
 INTEF (Instituto Nacional de Tecnologías Educativas y de Formación del Profesorado)