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+## Installation, Update, De-Installation
+
+### Requirements
+
+- PHP 5.3.2 or later (*)
+- MediaWiki 1.22 or later
+- [Composer][composer]
+
+Further required software packages will be installed automatically. It is *not*
+necessary to install any dependencies anymore. Composer will take care of that.
+
+(*) To use the *[Html](components.md#component-html)* component in [custom
+layouts](customization.md#creating-a-custom-layout) you need at least PHP 5.3.6.
+
+### Installation
+
+If unsure try the detailed installation instructions for
+[Windows](installation-windows.md) or [Linux](installation-linux.md).
+
+Here is the short version:
+
+1. On a command line go to your MediaWiki installation directory
+4. Open the `composer.local.json` file in an editor and add the Chameleon skin
+   to the `require` section:
+   ```
+   "require": {
+       "mediawiki/chameleon-skin": "~1.0"
+   }
+   ```
+   * Remark 1: If you do not have a `composer.local.json` file (MediaWiki <1.25),
+     use `composer.json` instead.
+   
+   * Remark 2: If you do not have a `composer.json` file (MediaWiki <1.23.5),
+     copy `composer.json.example` to `composer.json` first.
+3. With Composer installed, run
+   `composer update "mediawiki/chameleon-skin"`
+4. To set Chameleon as the default skin, open `LocalSettings.php` in an editor,
+   find `$wgDefaultSkin` and amend it: `$wgDefaultSkin='chameleon';`
+5. __Done:__ Navigate to _Special:Version_ on your wiki to verify that the skin
+   is successfully installed.
+
+If you run into problems, try the
+[troubleshooting](installation-troubleshooting.md).
+
+### Update
+
+From your MediaWiki installation directory run `composer update
+"mediawiki/chameleon-skin"`
+
+### De-installation
+
+Before de-installation make sure you secure (move, backup) any custom files you
+might want to retain.
+
+Remove the Chameleon skin from the `composer.local.json` file. Then run
+`composer update "mediawiki/chameleon-skin"` from the MediaWiki installation
+directory.
+
+[composer]: https://getcomposer.org/