[Backport v20-branch] Upgrading Guide for Altis v20

other-docs/guides/upgrading/README.md

@@ -12,16 +12,16 @@ specific version you are upgrading to. When upgrading multiple versions at once,
 all intermediate versions.
 
 To switch the version of Altis for your project, modify the version constraint for the `altis/altis` dependency in
-your `composer.json`. For example, to upgrade to Altis version 19.
+your `composer.json`. For example, to upgrade to Altis version 20.
 
 ```json
 {
     "name": "company-name/my-site",
     "require": {
-        "altis/altis": "^19.0.0"
+        "altis/altis": "^20.0.0"
     },
     "require-dev": {
-        "altis/local-server": "^19.0.0"
+        "altis/local-server": "^20.0.0"
     }
 }
 ```
@@ -43,6 +43,7 @@ with "BREAKING: " in the version release notes.
 
 ## Upgrade Guides
 
+- [Version 20](./v20.md)
 - [Version 19](./v19.md)
 - [Version 18](./v18.md)
 - [Version 17](./v17.md)

other-docs/guides/upgrading/v20.md

@@ -0,0 +1,87 @@
+---
+order: 20
+---
+
+# Upgrading to v20
+
+*If you are migrating from WordPress to Altis, check out the [migrating guide](../migrating/) first.*
+
+To upgrade to Altis v20, edit your `composer.json` and change the version constraint for `altis/altis` and any local environment
+modules to `^20.0.0`.
+
+```json
+{
+    "require": {
+        "altis/altis": "^20.0.0"
+    },
+    "require-dev": {
+        "altis/local-server": "^20.0.0"
+    },
+    "config": {
+        "platform": {
+            "php": "8.2"
+        }
+    }
+}
+```
+
+Once you have made these changes, run `composer update` and then run the `wp altis migrate` command:
+
+```sh
+# For cloud environments
+wp altis migrate
+
+# For local server
+composer server cli -- altis migrate
+```
+
+## Breaking Changes
+
+## Changes to the Altis platform
+
+Altis dev tools now come with `wp-browser` 4.x and `Codeception` 5.x This upgrade has some breaking changes. Please refer to
+the [wp-browser release notes](https://github.com/lucatume/wp-browser/releases/tag/4.0.0)
+and [Codeception release post](https://codeception.com/07-28-2022/codeception-5.html)
+
+## PHP
+
+We have added experimental support for PHP 8.3. This is not yet recommended for production use but you can test your code with
+PHP 8.3 in [Local Server](docs://local-server/).
+
+Refer to our [PHP Version Guide](docs://guides/updating-php/) for up-to-date compatibility, testing and upgrading information.
+
+## Headline Features
+
+## Node.js
+
+Altis now supports running Node.js applications alongside WordPress, utilizing WordPress as a headless API. See [our Node.js
+documentation](docs://cloud/nodejs/) for more information. This is an experimental feature, you can enable it in Local Server, and
+we welcome feedback.
+
+### WordPress 6.6.1
+
+WordPress 6.6 brings lots of new features, bug fixes, and improvements across the board. In particular, there are improvements
+in performance and accessibility, and new features and updates for the block editor (Gutenberg) and the block API.
+There have been theming improvements of interest to theme developers and designers.
+For developers, the Options API has been improved again, allowing more flexibility in fine-tuning your application performance.
+WordPress 6.6 also drops support for PHP7.0 and 7.1 but given Altis doesn't support PHP 7 at all, this will not affect your
+Altis sites. A number of new filter and action hooks have been added and improvements to modernise the code and apply coding
+standards have been made.
+
+See the
+[WordPress 6.6 Field Guide](https://make.wordpress.org/core/2024/06/25/wordpress-6-6-field-guide/) for more information.
+
+### Altis Core improvements
+
+Altis dev tools now come with `wp-browser` 4 and `Codeception` 5. This brings full support for PHP 8+. As well as improvements to
+both tools. See the [wp-browser release notes](https://github.com/lucatume/wp-browser/releases/tag/4.0.0)
+and [Codeception release post](https://codeception.com/07-28-2022/codeception-5.html)
+
+Local server now supports TablePlus as well as Sequel Ace.
+
+We have incorporated many updates to modules and libraries in Altis to bring in important bug fixes and improvements.
+
+### Documentation
+
+Our developer focused documentation has been improved again. As usual, feedback from our customers and partners is always welcome.
+Please [send us any feedback you have](mailto:[email protected]).