diff --git a/extension.json b/extension.json
index e89cdbc..42d5432 100644
--- a/extension.json
+++ b/extension.json
@@ -9,11 +9,32 @@
 	"license-name": "GPL-2.0-or-later",
 	"type": "other",
 	"requires": {
-		"MediaWiki": ">= 1.35.0"
+		"MediaWiki": ">= 1.38.0"
 	},
 	"config": {
 		"EnableMetaDescriptionFunctions": false,
-		"DescriptionMaxChars": 300
+		"DescriptionMaxChars": 300,
+		"DescriptionAlgorithm": "MediaWiki\\Extension\\Description2\\RemexDescriptionProvider",
+		"DescriptionRemoveElements": [
+			"table",
+			"div",
+			"script",
+			"style",
+			"figure",
+			"input",
+			"div.infobox",
+			"div.ambox",
+			"div.dmbox",
+			"ul.gallery",
+			".mw-editsection",
+			"sup.reference",
+			"ul.references",
+			".error",
+			".nomobile",
+			".noprint",
+			".noexcerpt",
+			".sortkey"
+		]
 	},
 	"ConfigRegistry": {
 		"Description2": "GlobalVarConfig::newInstance"
diff --git a/includes/Description2.php b/includes/Description2.php
index 6794e5d..3b6ce92 100644
--- a/includes/Description2.php
+++ b/includes/Description2.php
@@ -23,18 +23,10 @@ class Description2 {
 	 */
 	public static function setDescription( Parser $parser, $desc ) {
 		$parserOutput = $parser->getOutput();
-		if ( method_exists( $parserOutput, 'getPageProperty' ) ) {
-			// MW 1.38+
-			if ( $parserOutput->getPageProperty( 'description' ) !== null ) {
-				return;
-			}
-			$parserOutput->setPageProperty( 'description', $desc );
-		} else {
-			if ( $parserOutput->getProperty( 'description' ) !== false ) {
-				return;
-			}
-			$parserOutput->setProperty( 'description', $desc );
+		if ( $parserOutput->getPageProperty( 'description' ) !== null ) {
+			return;
 		}
+		$parserOutput->setPageProperty( 'description', $desc );
 	}
 
 	/**
diff --git a/includes/RemexDescriptionProvider.php b/includes/RemexDescriptionProvider.php
new file mode 100644
index 0000000..1fc42fa
--- /dev/null
+++ b/includes/RemexDescriptionProvider.php
@@ -0,0 +1,133 @@
+<?php
+
+namespace MediaWiki\Extension\Description2;
+
+use Config;
+use Wikimedia\RemexHtml\HTMLData;
+use Wikimedia\RemexHtml\Serializer\HtmlFormatter;
+use Wikimedia\RemexHtml\Serializer\Serializer;
+use Wikimedia\RemexHtml\Serializer\SerializerNode;
+use Wikimedia\RemexHtml\Tokenizer\Tokenizer;
+use Wikimedia\RemexHtml\TreeBuilder\Dispatcher;
+use Wikimedia\RemexHtml\TreeBuilder\TreeBuilder;
+
+class RemexDescriptionProvider implements DescriptionProvider {
+	/** @var string[] */
+	private array $toRemove;
+
+	/**
+	 * @param Config $config
+	 */
+	public function __construct( Config $config ) {
+		$this->toRemove = $config->get( 'DescriptionRemoveElements' );
+	}
+
+	/**
+	 * Extracts description from the HTML representation of a page.
+	 *
+	 * This algorithm:
+	 * 1. Looks for the first <hN> heading (potentially included in the ToC) and cuts the text to avoid unnecessary
+	 *    server load.
+	 * 2. Invokes RemexHTML to parse and reserialise the HTML representation.
+	 * 3. Comments are excluded.
+	 * 4. HTML elements are filtered by tag name and the 'class' attribute. Removals are dictated through the
+	 *    $wgDescriptionRemoveElements config variable.
+	 * 5. HTML tags are stripped, and only text is preserved.
+	 * 6. Strips white-space around the extract.
+	 *
+	 * This is more costly than the SimpleDescriptionProvider but is far more flexible and easier to manipulate by
+	 * editors.
+	 *
+	 * @param string $text
+	 * @return string
+	 */
+	public function derive( string $text ): ?string {
+		$formatter = new class( $options = [], $this->toRemove ) extends HtmlFormatter {
+
+			/** @var string[] */
+			private array $toRemove;
+
+			/**
+			 * @param array $options
+			 * @param array $toRemove
+			 */
+			public function __construct( $options, array $toRemove ) {
+				parent::__construct( $options );
+				$this->toRemove = $toRemove;
+			}
+
+			/**
+			 * Skips comments.
+			 *
+			 * @param SerializerNode $parent
+			 * @param string $text
+			 * @return void
+			 */
+			public function comment( SerializerNode $parent, $text ) {
+				return '';
+			}
+
+			/**
+			 * Strips out HTML tags leaving bare text, and strips out undesirable elements per configuration.
+			 *
+			 * @param SerializerNode $parent
+			 * @param SerializerNode $node
+			 * @param string $contents
+			 * @return void
+			 */
+			public function element( SerializerNode $parent, SerializerNode $node, $contents ) {
+				// Read CSS classes off the node into an array for later
+				$nodeClasses = $node->attrs->getValues()['class'] ?? null;
+				if ( $nodeClasses ) {
+					$nodeClasses = explode( ' ', $nodeClasses );
+				}
+
+				// Strip away elements matching our removal list. This only supports tags and classes.
+				foreach ( $this->toRemove as $selectorish ) {
+					$split = explode( '.', $selectorish );
+					$tagName = array_shift( $split );
+
+					if ( $tagName !== '' && $node->name !== $tagName ) {
+						continue;
+					}
+
+					if ( $split && ( !$nodeClasses || array_diff( $split, $nodeClasses ) ) ) {
+						continue;
+					}
+
+					return '';
+				}
+
+				return $contents;
+			}
+
+			/**
+			 * Skips document starter tags.
+			 *
+			 * @param string $fragmentNamespace
+			 * @param string $fragmentName
+			 * @return void
+			 */
+			public function startDocument( $fragmentNamespace, $fragmentName ) {
+				return '';
+			}
+		};
+
+		// Preserve only the first section
+		if ( preg_match( '/^.*?(?=<h[1-6]\b(?! id="mw-toc-heading"))/s', $text, $matches ) ) {
+			$text = $matches[0];
+		}
+
+		$serializer = new Serializer( $formatter );
+		$treeBuilder = new TreeBuilder( $serializer );
+		$dispatcher = new Dispatcher( $treeBuilder );
+		$tokenizer = new Tokenizer( $dispatcher, $text );
+
+		$tokenizer->execute( [
+			'fragmentNamespace' => HTMLData::NS_HTML,
+			'fragmentName' => 'body',
+		] );
+
+		return trim( $serializer->getResult() );
+	}
+}
diff --git a/includes/ServiceWiring.php b/includes/ServiceWiring.php
index 3358d00..26ff129 100644
--- a/includes/ServiceWiring.php
+++ b/includes/ServiceWiring.php
@@ -1,13 +1,14 @@
 <?php
 
 use MediaWiki\Extension\Description2\DescriptionProvider;
-use MediaWiki\Extension\Description2\SimpleDescriptionProvider;
 use MediaWiki\MediaWikiServices;
 
 return [
 	'Description2.DescriptionProvider' => static function (
 		MediaWikiServices $services
 	): DescriptionProvider {
-		return new SimpleDescriptionProvider();
+		// The provider implementation is determined by the $wgDescriptionAlgorithm variable.
+		$class = $services->getMainConfig()->get( 'DescriptionAlgorithm' );
+		return new $class( $services->getMainConfig() );
 	},
 ];
diff --git a/includes/SimpleDescriptionProvider.php b/includes/SimpleDescriptionProvider.php
index c94f08b..be9548f 100644
--- a/includes/SimpleDescriptionProvider.php
+++ b/includes/SimpleDescriptionProvider.php
@@ -2,7 +2,14 @@
 
 namespace MediaWiki\Extension\Description2;
 
+use Config;
+
 class SimpleDescriptionProvider implements DescriptionProvider {
+	/**
+	 * @param Config $config
+	 */
+	public function __construct( Config $config ) {
+	}
 
 	/**
 	 * Extracts description from the HTML representation of a page.