diff --git a/AGENTS.md b/AGENTS.md
index 027f644..9264928 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -22,7 +22,7 @@ Packages are plain WordPress **attachments** — there is no custom post type.
 
 | Area | Files |
 |------|-------|
-| Bootstrap | `exelearning.php` (`require_once` for every class), `includes/class-exelearning.php` (creates components; most register their own hooks), `includes/class-upgrader.php` (option migrations keyed on `exelearning_db_version`) |
+| Bootstrap | `exelearning.php` (`require_once` for every class), `includes/class-exelearning.php` (creates components; most register their own hooks), `includes/class-upgrader.php` (option migrations keyed on `exelearning_db_version`), `includes/class-filesystem.php` (shared recursive delete) |
 | Ingestion | `includes/class-elp-upload-handler.php` (upload, extraction, delete cleanup), `includes/class-elp-file-service.php` |
 | Reprocessing | `includes/class-elp-reprocessor.php` (class `ExeLearning_Reprocessor`), used by REST save/reprocess, the Media Library bulk action and `wp exelearning reprocess` (`includes/class-cli-command.php`); `includes/class-content-hash-aliases.php` keeps retired hashes as redirects (ADR-68-01) |
 | Content delivery | `includes/class-content-proxy.php`: `GET /wp-json/exelearning/v1/content/{hash}/{file}` with security headers and CSP. A generated `.htaccess` blocks direct HTML/SVG/XML access under `uploads/exelearning/` (Apache only); the `exelearning_content_origin` filter serves content from a separate host |
diff --git a/exelearning.php b/exelearning.php
index 01bebc5..0c0a39b 100644
--- a/exelearning.php
+++ b/exelearning.php
@@ -39,6 +39,7 @@
 require_once EXELEARNING_PLUGIN_DIR . 'includes/class-activator.php';
 require_once EXELEARNING_PLUGIN_DIR . 'includes/class-deactivator.php';
 require_once EXELEARNING_PLUGIN_DIR . 'includes/class-exelearning.php';
+require_once EXELEARNING_PLUGIN_DIR . 'includes/class-filesystem.php';
 require_once EXELEARNING_PLUGIN_DIR . 'includes/class-i18n.php';
 require_once EXELEARNING_PLUGIN_DIR . 'includes/class-mime-types.php';
 
diff --git a/includes/class-elp-file-service.php b/includes/class-elp-file-service.php
index e2900b2..d9c3f2a 100644
--- a/includes/class-elp-file-service.php
+++ b/includes/class-elp-file-service.php
@@ -2,7 +2,7 @@
 /**
  * ELP File Service for eXeLearning.
  *
- * Handles validation, parsing, and extraction of .elp/.elpx files.
+ * Handles validation, parsing, and extraction of .elpx packages.
  * Replaces the external exelearning/elp-parser library with inline logic
  * using native PHP ZipArchive and SimpleXML.
  *
@@ -16,7 +16,7 @@
 /**
  * Class ExeLearning_Elp_File_Service.
  *
- * Provides methods to validate, parse, and extract .elp files.
+ * Provides methods to validate, parse, and extract .elpx packages.
  */
 class ExeLearning_Elp_File_Service {
 
@@ -51,7 +51,7 @@ class ExeLearning_Elp_File_Service {
 	/**
 	 * Parses an ELP file and populates version and metadata.
 	 *
-	 * @param string $file_path Path to the .elp file.
+	 * @param string $file_path Path to the .elpx file.
 	 * @return true|WP_Error True on success, WP_Error on failure.
 	 */
 	public function parse( string $file_path ) {
@@ -170,7 +170,7 @@ private function extract_v3_metadata( SimpleXMLElement $xml ) {
 	/**
 	 * Extracts the ELP file contents to a directory.
 	 *
-	 * @param string $file_path   Path to the .elp file.
+	 * @param string $file_path   Path to the .elpx file.
 	 * @param string $destination Directory to extract to.
 	 * @return true|WP_Error True on success, WP_Error on failure.
 	 */
@@ -453,9 +453,9 @@ protected function get_zip_instance(): ZipArchive {
 	}
 
 	/**
-	 * Validates an .elp file and returns parsed data.
+	 * Validates an .elpx package and returns parsed data.
 	 *
-	 * @param string $file_path Path to the .elp file.
+	 * @param string $file_path Path to the .elpx file.
 	 * @return array|WP_Error Array with parsed data or WP_Error on failure.
 	 */
 	public function validate_elp_file( string $file_path ) {
diff --git a/includes/class-elp-reprocessor.php b/includes/class-elp-reprocessor.php
index c136299..5cc43dc 100644
--- a/includes/class-elp-reprocessor.php
+++ b/includes/class-elp-reprocessor.php
@@ -420,7 +420,7 @@ public function cleanup_by_hash( $hash ) {
 		$folder     = trailingslashit( $upload_dir['basedir'] ) . 'exelearning/' . $hash . '/';
 
 		if ( is_dir( $folder ) ) {
-			ExeLearning_Styles_Service::recursive_delete( $folder );
+			ExeLearning_Filesystem::recursive_delete( $folder );
 		}
 	}
 
diff --git a/includes/class-elp-upload-block.php b/includes/class-elp-upload-block.php
index f87e19d..7cde2b6 100644
--- a/includes/class-elp-upload-block.php
+++ b/includes/class-elp-upload-block.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * Registers the eXeLearning .elp upload block.
+ * Registers the eXeLearning .elpx upload block.
  *
  * @package Exelearning
  */
diff --git a/includes/class-elp-upload-handler.php b/includes/class-elp-upload-handler.php
index 607a467..bded416 100644
--- a/includes/class-elp-upload-handler.php
+++ b/includes/class-elp-upload-handler.php
@@ -2,7 +2,7 @@
 /**
  * File upload handler for eXeLearning files.
  *
- * This class validates and extracts .elp files upon upload.
+ * This class validates and extracts .elpx packages upon upload.
  *
  * @package Exelearning
  */
@@ -14,7 +14,7 @@
 /**
  * Class ExeLearning_Elp_Upload_Handler.
  *
- * Processes the .elp file uploads.
+ * Processes .elpx package uploads.
  */
 class ExeLearning_Elp_Upload_Handler {
 
@@ -58,9 +58,9 @@ public function register() {
 	}
 
 	/**
-	 * Processes .elp file uploads.
+	 * Processes .elpx package uploads.
 	 *
-	 * Checks if the uploaded file is a valid .elp (zip) file, verifies its structure,
+	 * Checks if the uploaded file is a valid .elpx (zip) package, verifies its structure,
 	 * and extracts it to a secure folder with a unique hash.
 	 *
 	 * @param array $upload The upload data.
@@ -82,7 +82,7 @@ public function process_elp_upload( $upload ) {
 			return $upload;
 		}
 
-		// Validate the .elp file using the ELP File Service.
+		// Validate the package using the ELP File Service.
 		$elp_service = new ExeLearning_Elp_File_Service();
 		$result      = $elp_service->validate_elp_file( $file );
 
@@ -113,7 +113,7 @@ public function process_elp_upload( $upload ) {
 		if ( is_wp_error( $extract_result ) ) {
 			// Remove any partially extracted files so a rejected upload leaves no
 			// orphaned directory behind.
-			ExeLearning_Styles_Service::recursive_delete( $destination );
+			ExeLearning_Filesystem::recursive_delete( $destination );
 			wp_delete_file( $file );
 			return array( 'error' => $extract_result->get_error_message() );
 		}
@@ -152,9 +152,6 @@ public function process_elp_upload( $upload ) {
 			300
 		);
 
-		// Optionally, remove the original .elp file.
-		// Example: unlink( $file ).
-
 		return $upload;
 	}
 
@@ -220,7 +217,7 @@ public function exelearning_delete_extracted_folder( $post_id ) {
 			$full_path  = trailingslashit( $upload_dir['basedir'] ) . 'exelearning/' . $directory . '/';
 
 			if ( is_dir( $full_path ) ) {
-				ExeLearning_Styles_Service::recursive_delete( $full_path );
+				ExeLearning_Filesystem::recursive_delete( $full_path );
 			}
 		}
 	}
diff --git a/includes/class-exelearning-editor.php b/includes/class-exelearning-editor.php
index 75d9b28..b52dece 100644
--- a/includes/class-exelearning-editor.php
+++ b/includes/class-exelearning-editor.php
@@ -2,7 +2,7 @@
 /**
  * Editor integration class for eXeLearning.
  *
- * Handles the fullscreen editor modal for editing .elp files.
+ * Handles the fullscreen editor modal for editing .elpx packages.
  *
  * @package Exelearning
  */
diff --git a/includes/class-exelearning-rest-api.php b/includes/class-exelearning-rest-api.php
index 567253e..b24e032 100644
--- a/includes/class-exelearning-rest-api.php
+++ b/includes/class-exelearning-rest-api.php
@@ -629,8 +629,8 @@ private function validate_elp_file_path( $attachment_id ) {
 	/**
 	 * Clean up extraction directory by hash.
 	 *
-	 * Unlike cleanup_old_extraction(), this takes a hash directly instead of
-	 * reading it from meta (which may already be updated to the new hash).
+	 * Takes the hash directly instead of reading it from meta, which may
+	 * already point at the new extraction.
 	 *
 	 * @param string $hash Extraction hash to clean up.
 	 */
diff --git a/includes/class-filesystem.php b/includes/class-filesystem.php
new file mode 100644
index 0000000..029bf70
--- /dev/null
+++ b/includes/class-filesystem.php
@@ -0,0 +1,40 @@
+<?php
+/**
+ * Filesystem helpers shared by the plugin.
+ *
+ * @package Exelearning
+ */
+
+if ( ! defined( 'WPINC' ) ) {
+	die;
+}
+
+/**
+ * Class ExeLearning_Filesystem.
+ */
+class ExeLearning_Filesystem {
+
+	/**
+	 * Recursively delete a directory. Safe to call on a missing path.
+	 *
+	 * @param string $dir Absolute path.
+	 * @return void
+	 */
+	public static function recursive_delete( $dir ) {
+		if ( ! file_exists( $dir ) ) {
+			return;
+		}
+		if ( is_link( $dir ) || is_file( $dir ) ) {
+			wp_delete_file( $dir );
+			return;
+		}
+		$items = scandir( $dir );
+		if ( false === $items ) {
+			return;
+		}
+		foreach ( array_diff( $items, array( '.', '..' ) ) as $item ) {
+			self::recursive_delete( $dir . DIRECTORY_SEPARATOR . $item );
+		}
+		@rmdir( $dir ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_rmdir,WordPress.PHP.NoSilencedErrors.Discouraged
+	}
+}
diff --git a/includes/class-styles-service.php b/includes/class-styles-service.php
index 3e5835b..9a53ae2 100644
--- a/includes/class-styles-service.php
+++ b/includes/class-styles-service.php
@@ -347,7 +347,7 @@ public static function delete_uploaded( $slug ) {
 		}
 		$dir = trailingslashit( self::get_storage_dir() ) . $slug;
 		if ( is_dir( $dir ) ) {
-			self::recursive_delete( $dir );
+			ExeLearning_Filesystem::recursive_delete( $dir );
 		}
 		unset( $registry['uploaded'][ $slug ] );
 		self::save_registry( $registry );
@@ -401,13 +401,13 @@ public static function install_from_zip( $zip_path, $orig_name = '' ) {
 
 		$extract_result = ExeLearning_Style_Package::extract_safely( $zip_path, $dest, $validation['prefix'] );
 		if ( is_wp_error( $extract_result ) ) {
-			self::recursive_delete( $dest );
+			ExeLearning_Filesystem::recursive_delete( $dest );
 			return $extract_result;
 		}
 
 		$css_files = ExeLearning_Style_Package::find_css_files( $dest );
 		if ( empty( $css_files ) ) {
-			self::recursive_delete( $dest );
+			ExeLearning_Filesystem::recursive_delete( $dest );
 			return new WP_Error(
 				'style_no_css',
 				__( 'The uploaded style does not contain any stylesheet.', 'exelearning' )
@@ -615,28 +615,4 @@ public static function allocate_unique_slug( $requested ) {
 		}
 		return $slug;
 	}
-
-	/**
-	 * Recursively delete a directory. Safe to call on a missing path.
-	 *
-	 * @param string $dir Absolute path.
-	 * @return void
-	 */
-	public static function recursive_delete( $dir ) {
-		if ( ! file_exists( $dir ) ) {
-			return;
-		}
-		if ( is_link( $dir ) || is_file( $dir ) ) {
-			wp_delete_file( $dir );
-			return;
-		}
-		$items = scandir( $dir );
-		if ( false === $items ) {
-			return;
-		}
-		foreach ( array_diff( $items, array( '.', '..' ) ) as $item ) {
-			self::recursive_delete( $dir . DIRECTORY_SEPARATOR . $item );
-		}
-		@rmdir( $dir ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_rmdir,WordPress.PHP.NoSilencedErrors.Discouraged
-	}
 }
diff --git a/includes/integrations/class-media-library.php b/includes/integrations/class-media-library.php
index 17d0c26..7862dff 100644
--- a/includes/integrations/class-media-library.php
+++ b/includes/integrations/class-media-library.php
@@ -393,7 +393,7 @@ public function render_elp_column( $column_name, $post_id ) {
 			return;
 		}
 
-		// Check if it is an .elp file using metadata.
+		// Only extracted eXeLearning packages carry this meta.
 		$is_elp = get_post_meta( $post_id, '_exelearning_extracted', true );
 
 		if ( $is_elp ) {
diff --git a/tests/unit/DeveloperHooksTest.php b/tests/unit/DeveloperHooksTest.php
index 2ae3254..f1bb95d 100644
--- a/tests/unit/DeveloperHooksTest.php
+++ b/tests/unit/DeveloperHooksTest.php
@@ -42,7 +42,7 @@ public function tear_down() {
 		delete_option( ExeLearning_Styles_Service::OPTION_REGISTRY );
 		$storage = ExeLearning_Styles_Service::get_storage_dir();
 		if ( is_dir( $storage ) ) {
-			ExeLearning_Styles_Service::recursive_delete( $storage );
+			ExeLearning_Filesystem::recursive_delete( $storage );
 		}
 		parent::tear_down();
 	}
diff --git a/tests/unit/ElpFileServiceTest.php b/tests/unit/ElpFileServiceTest.php
index 96dfa70..225d698 100644
--- a/tests/unit/ElpFileServiceTest.php
+++ b/tests/unit/ElpFileServiceTest.php
@@ -554,7 +554,7 @@ public function test_extract_refuses_an_archive_over_the_size_budget() {
 		$this->assertSame( 'elp_too_large', $result->get_error_code() );
 		$this->assertSame( array(), glob( trailingslashit( $destination ) . '*' ) );
 
-		ExeLearning_Styles_Service::recursive_delete( $destination );
+		ExeLearning_Filesystem::recursive_delete( $destination );
 	}
 
 	/**
@@ -594,7 +594,7 @@ public function test_extract_fails_when_an_entry_cannot_be_written() {
 		$result = $this->service->extract( $archive, trailingslashit( $destination ) );
 
 		wp_delete_file( $archive );
-		ExeLearning_Styles_Service::recursive_delete( $destination );
+		ExeLearning_Filesystem::recursive_delete( $destination );
 
 		$this->assertInstanceOf( 'WP_Error', $result );
 		$this->assertSame( 'elp_mkdir_failed', $result->get_error_code() );
@@ -616,7 +616,7 @@ public function test_extract_entry_creates_directory_entries() {
 		$this->assertTrue( $result );
 		$this->assertDirectoryExists( $destination . '/media' );
 
-		ExeLearning_Styles_Service::recursive_delete( $destination );
+		ExeLearning_Filesystem::recursive_delete( $destination );
 	}
 
 	/**
diff --git a/tests/unit/ElpUploadHandlerTest.php b/tests/unit/ElpUploadHandlerTest.php
index f6e6fde..a0966f1 100644
--- a/tests/unit/ElpUploadHandlerTest.php
+++ b/tests/unit/ElpUploadHandlerTest.php
@@ -40,7 +40,7 @@ public function set_up() {
 	 */
 	public function tear_down() {
 		foreach ( $this->cleanup_paths as $path ) {
-			ExeLearning_Styles_Service::recursive_delete( $path );
+			ExeLearning_Filesystem::recursive_delete( $path );
 		}
 		$this->cleanup_paths = array();
 		parent::tear_down();
diff --git a/tests/unit/FilesystemTest.php b/tests/unit/FilesystemTest.php
new file mode 100644
index 0000000..bb18919
--- /dev/null
+++ b/tests/unit/FilesystemTest.php
@@ -0,0 +1,45 @@
+<?php
+/**
+ * Tests for ExeLearning_Filesystem.
+ *
+ * @package Exelearning
+ */
+
+/**
+ * Class FilesystemTest.
+ *
+ * @covers ExeLearning_Filesystem
+ */
+class FilesystemTest extends WP_UnitTestCase {
+
+	/**
+	 * Deleting a path that is not there returns early and, crucially, does not
+	 * walk up and take a sibling with it.
+	 */
+	public function test_recursive_delete_handles_missing_path_gracefully() {
+		$bystander = sys_get_temp_dir() . '/deltree-keep-' . uniqid();
+		mkdir( $bystander, 0755, true );
+		file_put_contents( $bystander . '/keep.txt', 'keep' ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_file_put_contents
+
+		$missing = sys_get_temp_dir() . '/does-not-exist-' . uniqid();
+		$this->assertDirectoryDoesNotExist( $missing, 'Precondition: the path must be absent.' );
+
+		ExeLearning_Filesystem::recursive_delete( $missing );
+
+		$this->assertDirectoryDoesNotExist( $missing );
+		$this->assertFileExists( $bystander . '/keep.txt', 'A sibling directory was deleted.' );
+
+		ExeLearning_Filesystem::recursive_delete( $bystander );
+	}
+
+	public function test_recursive_delete_removes_nested_files() {
+		$root = sys_get_temp_dir() . '/deltree-' . uniqid();
+		mkdir( $root . '/inner/deep', 0755, true );
+		file_put_contents( $root . '/a.txt', 'a' );
+		file_put_contents( $root . '/inner/b.txt', 'b' );
+		file_put_contents( $root . '/inner/deep/c.txt', 'c' );
+		$this->assertDirectoryExists( $root );
+		ExeLearning_Filesystem::recursive_delete( $root );
+		$this->assertDirectoryDoesNotExist( $root );
+	}
+}
diff --git a/tests/unit/RestApiTest.php b/tests/unit/RestApiTest.php
index 6388e85..233287a 100644
--- a/tests/unit/RestApiTest.php
+++ b/tests/unit/RestApiTest.php
@@ -47,7 +47,7 @@ public function tear_down() {
 		global $wp_rest_server;
 		$wp_rest_server = null;
 		foreach ( $this->cleanup_paths as $path ) {
-			ExeLearning_Styles_Service::recursive_delete( $path );
+			ExeLearning_Filesystem::recursive_delete( $path );
 		}
 		$this->cleanup_paths = array();
 		parent::tear_down();
diff --git a/tests/unit/ShortcodesTest.php b/tests/unit/ShortcodesTest.php
index 41cb8b4..b4a9cc7 100644
--- a/tests/unit/ShortcodesTest.php
+++ b/tests/unit/ShortcodesTest.php
@@ -40,7 +40,7 @@ public function set_up() {
 	 */
 	public function tear_down() {
 		foreach ( $this->cleanup_paths as $path ) {
-			ExeLearning_Styles_Service::recursive_delete( $path );
+			ExeLearning_Filesystem::recursive_delete( $path );
 		}
 		$this->cleanup_paths = array();
 		parent::tear_down();
diff --git a/tests/unit/StylePackageTest.php b/tests/unit/StylePackageTest.php
index b8b3e3f..cf3de28 100644
--- a/tests/unit/StylePackageTest.php
+++ b/tests/unit/StylePackageTest.php
@@ -32,7 +32,7 @@ class StylePackageTest extends WP_UnitTestCase {
 	public function tear_down() {
 		foreach ( $this->temp_dirs as $dir ) {
 			if ( is_dir( $dir ) ) {
-				ExeLearning_Styles_Service::recursive_delete( $dir );
+				ExeLearning_Filesystem::recursive_delete( $dir );
 			}
 		}
 		parent::tear_down();
diff --git a/tests/unit/StylesServiceTest.php b/tests/unit/StylesServiceTest.php
index 5bd1185..c575df0 100644
--- a/tests/unit/StylesServiceTest.php
+++ b/tests/unit/StylesServiceTest.php
@@ -30,7 +30,7 @@ public function tear_down() {
 		delete_option( ExeLearning_Styles_Service::OPTION_DISABLED_STYLES );
 		$storage = ExeLearning_Styles_Service::get_storage_dir();
 		if ( is_dir( $storage ) ) {
-			ExeLearning_Styles_Service::recursive_delete( $storage );
+			ExeLearning_Filesystem::recursive_delete( $storage );
 		}
 		parent::tear_down();
 	}
@@ -432,37 +432,6 @@ public function test_get_registry_survives_garbage_option_value() {
 		$this->assertSame( array(), $r['disabled_builtins'] );
 	}
 
-	/**
-	 * Deleting a path that is not there returns early and, crucially, does not
-	 * walk up and take a sibling with it.
-	 */
-	public function test_recursive_delete_handles_missing_path_gracefully() {
-		$bystander = sys_get_temp_dir() . '/deltree-keep-' . uniqid();
-		mkdir( $bystander, 0755, true );
-		file_put_contents( $bystander . '/keep.txt', 'keep' ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_file_put_contents
-
-		$missing = sys_get_temp_dir() . '/does-not-exist-' . uniqid();
-		$this->assertDirectoryDoesNotExist( $missing, 'Precondition: the path must be absent.' );
-
-		ExeLearning_Styles_Service::recursive_delete( $missing );
-
-		$this->assertDirectoryDoesNotExist( $missing );
-		$this->assertFileExists( $bystander . '/keep.txt', 'A sibling directory was deleted.' );
-
-		ExeLearning_Styles_Service::recursive_delete( $bystander );
-	}
-
-	public function test_recursive_delete_removes_nested_files() {
-		$root = sys_get_temp_dir() . '/deltree-' . uniqid();
-		mkdir( $root . '/inner/deep', 0755, true );
-		file_put_contents( $root . '/a.txt', 'a' );
-		file_put_contents( $root . '/inner/b.txt', 'b' );
-		file_put_contents( $root . '/inner/deep/c.txt', 'c' );
-		$this->assertDirectoryExists( $root );
-		ExeLearning_Styles_Service::recursive_delete( $root );
-		$this->assertDirectoryDoesNotExist( $root );
-	}
-
 	public function test_build_theme_registry_override_respects_enabled_flag() {
 		$zip_path = $this->make_zip(
 			array(