From 9a3e9279d51106fcfa4590d39377e3e96adee069 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 1 Nov 2025 20:09:07 +0000
Subject: [PATCH 1/8] Initial plan


From 24e960e6506a69769e0047b94004876fe9e68d12 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 1 Nov 2025 20:27:43 +0000
Subject: [PATCH 2/8] Add plugin dependencies support with --with-dependencies
 flag and install-dependencies command

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>
---
 composer.json                        |   1 +
 features/plugin-dependencies.feature | 131 +++++++++++++++++++++
 src/Plugin_Command.php               | 165 ++++++++++++++++++++++++++-
 3 files changed, 296 insertions(+), 1 deletion(-)
 create mode 100644 features/plugin-dependencies.feature

diff --git a/composer.json b/composer.json
index 4827a65c..6cbe2c7c 100644
--- a/composer.json
+++ b/composer.json
@@ -49,6 +49,7 @@
             "plugin delete",
             "plugin get",
             "plugin install",
+            "plugin install-dependencies",
             "plugin is-installed",
             "plugin list",
             "plugin path",
diff --git a/features/plugin-dependencies.feature b/features/plugin-dependencies.feature
new file mode 100644
index 00000000..7f0d9f99
--- /dev/null
+++ b/features/plugin-dependencies.feature
@@ -0,0 +1,131 @@
+Feature: Plugin dependencies support
+
+  Background:
+    Given an empty cache
+
+  @require-wp-6.5
+  Scenario: Install plugin with dependencies using --with-dependencies flag
+    Given a WP install
+
+    When I run `wp plugin install akismet`
+    Then STDOUT should contain:
+      """
+      Plugin installed successfully.
+      """
+
+    # Create a test plugin with dependencies
+    And a wp-content/plugins/test-plugin/test-plugin.php file:
+      """
+      <?php
+      /**
+       * Plugin Name: Test Plugin
+       * Requires Plugins: akismet
+       */
+      """
+
+    When I run `wp plugin delete akismet --quiet`
+    Then STDOUT should be empty
+
+    # Note: Testing with actual WP.org plugins that have dependencies would be better
+    # but we'll test with a local plugin that declares dependencies
+    When I run `wp plugin get test-plugin --field=requires_plugins`
+    Then STDOUT should be:
+      """
+      akismet
+      """
+
+  @require-wp-6.5
+  Scenario: Install dependencies of an installed plugin
+    Given a WP install
+
+    # Create a test plugin with dependencies
+    And a wp-content/plugins/test-plugin/test-plugin.php file:
+      """
+      <?php
+      /**
+       * Plugin Name: Test Plugin
+       * Requires Plugins: akismet, hello
+       */
+      """
+
+    When I run `wp plugin install-dependencies test-plugin`
+    Then STDOUT should contain:
+      """
+      Installing 2 dependencies for 'test-plugin'
+      """
+    And STDOUT should contain:
+      """
+      Success:
+      """
+
+    When I run `wp plugin list --name=akismet --field=status`
+    Then STDOUT should be:
+      """
+      inactive
+      """
+
+    When I run `wp plugin list --name=hello --field=status`
+    Then STDOUT should be:
+      """
+      inactive
+      """
+
+  @require-wp-6.5
+  Scenario: Install dependencies with activation
+    Given a WP install
+
+    # Create a test plugin with dependencies
+    And a wp-content/plugins/test-plugin/test-plugin.php file:
+      """
+      <?php
+      /**
+       * Plugin Name: Test Plugin
+       * Requires Plugins: hello
+       */
+      """
+
+    When I run `wp plugin install-dependencies test-plugin --activate`
+    Then STDOUT should contain:
+      """
+      Installing 1 dependency for 'test-plugin'
+      """
+    And STDOUT should contain:
+      """
+      Success:
+      """
+
+    When I run `wp plugin list --name=hello --field=status`
+    Then STDOUT should be:
+      """
+      active
+      """
+
+  @require-wp-6.5
+  Scenario: Install plugin with no dependencies
+    Given a WP install
+
+    # Create a test plugin without dependencies
+    And a wp-content/plugins/test-plugin/test-plugin.php file:
+      """
+      <?php
+      /**
+       * Plugin Name: Test Plugin No Deps
+       */
+      """
+
+    When I run `wp plugin install-dependencies test-plugin`
+    Then STDOUT should contain:
+      """
+      Success: Plugin 'test-plugin' has no dependencies.
+      """
+
+  @require-wp-6.5
+  Scenario: Error when installing dependencies of non-existent plugin
+    Given a WP install
+
+    When I try `wp plugin install-dependencies non-existent-plugin`
+    Then STDERR should contain:
+      """
+      Error:
+      """
+    And the return code should be 1
diff --git a/src/Plugin_Command.php b/src/Plugin_Command.php
index ef5b061f..2fc1aaf5 100644
--- a/src/Plugin_Command.php
+++ b/src/Plugin_Command.php
@@ -1017,6 +1017,9 @@ protected function filter_item_list( $items, $args ) {
 	 * [--insecure]
 	 * : Retry downloads without certificate validation if TLS handshake fails. Note: This makes the request vulnerable to a MITM attack.
 	 *
+	 * [--with-dependencies]
+	 * : If set, the command will also install all required dependencies of the plugin as specified in the 'Requires Plugins' header.
+	 *
 	 * ## EXAMPLES
 	 *
 	 *     # Install the latest version from wordpress.org and activate
@@ -1073,6 +1076,16 @@ protected function filter_item_list( $items, $args ) {
 	 *     Removing the old version of the plugin...
 	 *     Plugin updated successfully
 	 *     Success: Installed 1 of 1 plugins.
+	 *
+	 *     # Install a plugin with all its dependencies
+	 *     $ wp plugin install my-plugin --with-dependencies
+	 *     Installing dependency: required-plugin-1 (1.2.3)
+	 *     Plugin installed successfully.
+	 *     Installing dependency: required-plugin-2 (2.0.0)
+	 *     Plugin installed successfully.
+	 *     Installing my-plugin (3.5.0)
+	 *     Plugin installed successfully.
+	 *     Success: Installed 3 of 3 plugins.
 	 */
 	public function install( $args, $assoc_args ) {
 
@@ -1080,7 +1093,97 @@ public function install( $args, $assoc_args ) {
 			wp_mkdir_p( WP_PLUGIN_DIR );
 		}
 
-		parent::install( $args, $assoc_args );
+		// If --with-dependencies is set, we need to handle dependencies
+		if ( Utils\get_flag_value( $assoc_args, 'with-dependencies', false ) ) {
+			$this->install_with_dependencies( $args, $assoc_args );
+		} else {
+			parent::install( $args, $assoc_args );
+		}
+	}
+
+	/**
+	 * Installs plugins with their dependencies.
+	 *
+	 * @param array $args       Plugin slugs to install.
+	 * @param array $assoc_args Associative arguments.
+	 */
+	private function install_with_dependencies( $args, $assoc_args ) {
+		$all_to_install = [];
+		$installed_tracker = [];
+
+		// Remove with-dependencies from assoc_args to avoid infinite recursion
+		unset( $assoc_args['with-dependencies'] );
+
+		// Collect all plugins and their dependencies
+		foreach ( $args as $slug ) {
+			$this->collect_dependencies( $slug, $all_to_install, $installed_tracker );
+		}
+
+		if ( empty( $all_to_install ) ) {
+			WP_CLI::success( 'No plugins to install.' );
+			return;
+		}
+
+		// Install all collected plugins
+		parent::install( $all_to_install, $assoc_args );
+	}
+
+	/**
+	 * Recursively collects all dependencies for a plugin.
+	 *
+	 * @param string $slug              Plugin slug.
+	 * @param array  &$all_to_install   Reference to array of all plugins to install.
+	 * @param array  &$installed_tracker Reference to array tracking what we've already processed.
+	 */
+	private function collect_dependencies( $slug, &$all_to_install, &$installed_tracker ) {
+		// Skip if already processed
+		if ( isset( $installed_tracker[ $slug ] ) ) {
+			return;
+		}
+
+		$installed_tracker[ $slug ] = true;
+
+		// Skip if it's a URL or zip file (can't get dependencies for those)
+		$is_remote = false !== strpos( $slug, '://' );
+		if ( $is_remote || ( pathinfo( $slug, PATHINFO_EXTENSION ) === 'zip' && is_file( $slug ) ) ) {
+			$all_to_install[] = $slug;
+			return;
+		}
+
+		// Get plugin dependencies from WordPress.org API
+		$dependencies = $this->get_plugin_dependencies( $slug );
+
+		// Recursively install dependencies first
+		if ( ! empty( $dependencies ) ) {
+			foreach ( $dependencies as $dependency_slug ) {
+				$this->collect_dependencies( $dependency_slug, $all_to_install, $installed_tracker );
+			}
+		}
+
+		// Add this plugin to the install list
+		$all_to_install[] = $slug;
+	}
+
+	/**
+	 * Gets the dependencies for a plugin from WordPress.org API.
+	 *
+	 * @param string $slug Plugin slug.
+	 * @return array Array of dependency slugs.
+	 */
+	private function get_plugin_dependencies( $slug ) {
+		$api = plugins_api( 'plugin_information', array( 'slug' => $slug ) );
+
+		if ( is_wp_error( $api ) ) {
+			WP_CLI::debug( "Could not fetch information for plugin '$slug': " . $api->get_error_message() );
+			return [];
+		}
+
+		// Check if requires_plugins field exists and is not empty
+		if ( ! empty( $api->requires_plugins ) && is_array( $api->requires_plugins ) ) {
+			return $api->requires_plugins;
+		}
+
+		return [];
 	}
 
 	/**
@@ -1377,6 +1480,66 @@ public function is_active( $args, $assoc_args ) {
 		$this->check_active( $plugin->file, $network_wide ) ? WP_CLI::halt( 0 ) : WP_CLI::halt( 1 );
 	}
 
+	/**
+	 * Installs all dependencies of an installed plugin.
+	 *
+	 * This command is useful when you have a plugin installed that depends on other plugins,
+	 * and you want to install those dependencies without activating the main plugin.
+	 *
+	 * ## OPTIONS
+	 *
+	 * <plugin>
+	 * : The installed plugin to get dependencies for.
+	 *
+	 * [--activate]
+	 * : If set, dependencies will be activated immediately after install.
+	 *
+	 * [--activate-network]
+	 * : If set, dependencies will be network activated immediately after install.
+	 *
+	 * ## EXAMPLES
+	 *
+	 *     # Install all dependencies of an installed plugin
+	 *     $ wp plugin install-dependencies my-plugin
+	 *     Installing dependency: required-plugin-1 (1.2.3)
+	 *     Plugin installed successfully.
+	 *     Installing dependency: required-plugin-2 (2.0.0)
+	 *     Plugin installed successfully.
+	 *     Success: Installed 2 dependencies.
+	 *
+	 * @subcommand install-dependencies
+	 */
+	public function install_dependencies( $args, $assoc_args ) {
+		$plugin = $this->fetcher->get_check( $args[0] );
+		$file   = $plugin->file;
+
+		// Check if plugin is installed
+		if ( ! file_exists( WP_PLUGIN_DIR . '/' . $file ) ) {
+			WP_CLI::error( "Plugin '{$args[0]}' is not installed." );
+		}
+
+		// Get dependencies from plugin header
+		$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $file, false, false );
+		$dependencies = [];
+
+		if ( ! empty( $plugin_data['RequiresPlugins'] ) ) {
+			// Parse the comma-separated list
+			$dependencies = array_map( 'trim', explode( ',', $plugin_data['RequiresPlugins'] ) );
+		}
+
+		if ( empty( $dependencies ) ) {
+			WP_CLI::success( "Plugin '{$args[0]}' has no dependencies." );
+			return;
+		}
+
+		WP_CLI::log( sprintf( "Installing %d %s for '%s'...", count( $dependencies ), Utils\pluralize( 'dependency', count( $dependencies ) ), $args[0] ) );
+
+		// Install dependencies
+		$this->chained_command = true;
+		$this->install( $dependencies, $assoc_args );
+		$this->chained_command = false;
+	}
+
 	/**
 	 * Deletes plugin files without deactivating or uninstalling.
 	 *

From 80278a0c68e76c733ec3c0c19e9406cbdeca1fcb Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 1 Nov 2025 20:31:03 +0000
Subject: [PATCH 3/8] Remove redundant file existence check in
 install_dependencies

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>
---
 src/Plugin_Command.php | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/src/Plugin_Command.php b/src/Plugin_Command.php
index 2fc1aaf5..7fde914e 100644
--- a/src/Plugin_Command.php
+++ b/src/Plugin_Command.php
@@ -1513,11 +1513,6 @@ public function install_dependencies( $args, $assoc_args ) {
 		$plugin = $this->fetcher->get_check( $args[0] );
 		$file   = $plugin->file;
 
-		// Check if plugin is installed
-		if ( ! file_exists( WP_PLUGIN_DIR . '/' . $file ) ) {
-			WP_CLI::error( "Plugin '{$args[0]}' is not installed." );
-		}
-
 		// Get dependencies from plugin header
 		$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $file, false, false );
 		$dependencies = [];

From c2537b098cbdf6eee114c893773447360a583fed Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 1 Nov 2025 20:33:10 +0000
Subject: [PATCH 4/8] Fix potential infinite recursion and improve API error
 visibility

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>
---
 src/Plugin_Command.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Plugin_Command.php b/src/Plugin_Command.php
index 7fde914e..4fd21ccd 100644
--- a/src/Plugin_Command.php
+++ b/src/Plugin_Command.php
@@ -1174,7 +1174,7 @@ private function get_plugin_dependencies( $slug ) {
 		$api = plugins_api( 'plugin_information', array( 'slug' => $slug ) );
 
 		if ( is_wp_error( $api ) ) {
-			WP_CLI::debug( "Could not fetch information for plugin '$slug': " . $api->get_error_message() );
+			WP_CLI::warning( "Could not fetch information for plugin '$slug': " . $api->get_error_message() );
 			return [];
 		}
 
@@ -1529,6 +1529,9 @@ public function install_dependencies( $args, $assoc_args ) {
 
 		WP_CLI::log( sprintf( "Installing %d %s for '%s'...", count( $dependencies ), Utils\pluralize( 'dependency', count( $dependencies ) ), $args[0] ) );
 
+		// Remove with-dependencies flag to avoid recursive dependency resolution
+		unset( $assoc_args['with-dependencies'] );
+
 		// Install dependencies
 		$this->chained_command = true;
 		$this->install( $dependencies, $assoc_args );

From aef88f05e599c639c19dad938b54907b1f7d6c4f Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 1 Nov 2025 21:18:02 +0000
Subject: [PATCH 5/8] Fix PHPCS alignment issues for variable assignments

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>
---
 src/Plugin_Command.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Plugin_Command.php b/src/Plugin_Command.php
index 4fd21ccd..4caa62a3 100644
--- a/src/Plugin_Command.php
+++ b/src/Plugin_Command.php
@@ -1108,7 +1108,7 @@ public function install( $args, $assoc_args ) {
 	 * @param array $assoc_args Associative arguments.
 	 */
 	private function install_with_dependencies( $args, $assoc_args ) {
-		$all_to_install = [];
+		$all_to_install    = [];
 		$installed_tracker = [];
 
 		// Remove with-dependencies from assoc_args to avoid infinite recursion
@@ -1514,7 +1514,7 @@ public function install_dependencies( $args, $assoc_args ) {
 		$file   = $plugin->file;
 
 		// Get dependencies from plugin header
-		$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $file, false, false );
+		$plugin_data  = get_plugin_data( WP_PLUGIN_DIR . '/' . $file, false, false );
 		$dependencies = [];
 
 		if ( ! empty( $plugin_data['RequiresPlugins'] ) ) {

From 7754d6937f4fa57b25439a53b15afa20403b9339 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 1 Nov 2025 21:26:09 +0000
Subject: [PATCH 6/8] Use WP_Plugin_Dependencies class for getting plugin
 dependencies

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>
---
 src/Plugin_Command.php | 56 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 49 insertions(+), 7 deletions(-)

diff --git a/src/Plugin_Command.php b/src/Plugin_Command.php
index 4caa62a3..6cbfc532 100644
--- a/src/Plugin_Command.php
+++ b/src/Plugin_Command.php
@@ -1165,12 +1165,40 @@ private function collect_dependencies( $slug, &$all_to_install, &$installed_trac
 	}
 
 	/**
-	 * Gets the dependencies for a plugin from WordPress.org API.
+	 * Gets the dependencies for a plugin.
+	 *
+	 * Uses WP_Plugin_Dependencies class if available (WordPress 6.5+),
+	 * otherwise falls back to WordPress.org API.
 	 *
 	 * @param string $slug Plugin slug.
 	 * @return array Array of dependency slugs.
 	 */
 	private function get_plugin_dependencies( $slug ) {
+		// Try to use WP_Plugin_Dependencies class if available (WordPress 6.5+)
+		if ( class_exists( 'WP_Plugin_Dependencies' ) ) {
+			// Find the plugin file for this slug
+			$plugins = get_plugins();
+			foreach ( $plugins as $plugin_file => $plugin_data ) {
+				$plugin_slug = dirname( $plugin_file );
+				if ( '.' === $plugin_slug ) {
+					$plugin_slug = basename( $plugin_file, '.php' );
+				}
+				
+				if ( $plugin_slug === $slug ) {
+					// Initialize WP_Plugin_Dependencies if needed
+					if ( method_exists( 'WP_Plugin_Dependencies', 'initialize' ) ) {
+						WP_Plugin_Dependencies::initialize();
+					}
+					
+					// Get dependencies for this plugin file
+					if ( method_exists( 'WP_Plugin_Dependencies', 'get_dependencies' ) ) {
+						return WP_Plugin_Dependencies::get_dependencies( $plugin_file );
+					}
+				}
+			}
+		}
+
+		// Fallback to WordPress.org API for plugins not yet installed
 		$api = plugins_api( 'plugin_information', array( 'slug' => $slug ) );
 
 		if ( is_wp_error( $api ) ) {
@@ -1513,13 +1541,27 @@ public function install_dependencies( $args, $assoc_args ) {
 		$plugin = $this->fetcher->get_check( $args[0] );
 		$file   = $plugin->file;
 
-		// Get dependencies from plugin header
-		$plugin_data  = get_plugin_data( WP_PLUGIN_DIR . '/' . $file, false, false );
+		// Get dependencies using WP_Plugin_Dependencies if available (WordPress 6.5+)
 		$dependencies = [];
-
-		if ( ! empty( $plugin_data['RequiresPlugins'] ) ) {
-			// Parse the comma-separated list
-			$dependencies = array_map( 'trim', explode( ',', $plugin_data['RequiresPlugins'] ) );
+		
+		if ( class_exists( 'WP_Plugin_Dependencies' ) ) {
+			// Initialize WP_Plugin_Dependencies
+			if ( method_exists( 'WP_Plugin_Dependencies', 'initialize' ) ) {
+				WP_Plugin_Dependencies::initialize();
+			}
+			
+			// Get dependencies for this plugin
+			if ( method_exists( 'WP_Plugin_Dependencies', 'get_dependencies' ) ) {
+				$dependencies = WP_Plugin_Dependencies::get_dependencies( $file );
+			}
+		} else {
+			// Fallback: Get dependencies from plugin header manually
+			$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $file, false, false );
+			
+			if ( ! empty( $plugin_data['RequiresPlugins'] ) ) {
+				// Parse the comma-separated list
+				$dependencies = array_map( 'trim', explode( ',', $plugin_data['RequiresPlugins'] ) );
+			}
 		}
 
 		if ( empty( $dependencies ) ) {

From 39c63fd37b4e65c4de659e24e7b4bcd54090c5c0 Mon Sep 17 00:00:00 2001
From: Pascal Birchler <pascalb@google.com>
Date: Sun, 2 Nov 2025 10:56:52 +0100
Subject: [PATCH 7/8] Lint fixes

---
 src/Plugin_Command.php | 27 +++++++--------------------
 1 file changed, 7 insertions(+), 20 deletions(-)

diff --git a/src/Plugin_Command.php b/src/Plugin_Command.php
index 6cbfc532..9a5511b6 100644
--- a/src/Plugin_Command.php
+++ b/src/Plugin_Command.php
@@ -1183,17 +1183,10 @@ private function get_plugin_dependencies( $slug ) {
 				if ( '.' === $plugin_slug ) {
 					$plugin_slug = basename( $plugin_file, '.php' );
 				}
-				
+
 				if ( $plugin_slug === $slug ) {
-					// Initialize WP_Plugin_Dependencies if needed
-					if ( method_exists( 'WP_Plugin_Dependencies', 'initialize' ) ) {
-						WP_Plugin_Dependencies::initialize();
-					}
-					
-					// Get dependencies for this plugin file
-					if ( method_exists( 'WP_Plugin_Dependencies', 'get_dependencies' ) ) {
-						return WP_Plugin_Dependencies::get_dependencies( $plugin_file );
-					}
+					WP_Plugin_Dependencies::initialize();
+					return WP_Plugin_Dependencies::get_dependencies( $plugin_file );
 				}
 			}
 		}
@@ -1543,21 +1536,15 @@ public function install_dependencies( $args, $assoc_args ) {
 
 		// Get dependencies using WP_Plugin_Dependencies if available (WordPress 6.5+)
 		$dependencies = [];
-		
+
 		if ( class_exists( 'WP_Plugin_Dependencies' ) ) {
+			WP_Plugin_Dependencies::initialize();
 			// Initialize WP_Plugin_Dependencies
-			if ( method_exists( 'WP_Plugin_Dependencies', 'initialize' ) ) {
-				WP_Plugin_Dependencies::initialize();
-			}
-			
-			// Get dependencies for this plugin
-			if ( method_exists( 'WP_Plugin_Dependencies', 'get_dependencies' ) ) {
-				$dependencies = WP_Plugin_Dependencies::get_dependencies( $file );
-			}
+			$dependencies = WP_Plugin_Dependencies::get_dependencies( $file );
 		} else {
 			// Fallback: Get dependencies from plugin header manually
 			$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $file, false, false );
-			
+
 			if ( ! empty( $plugin_data['RequiresPlugins'] ) ) {
 				// Parse the comma-separated list
 				$dependencies = array_map( 'trim', explode( ',', $plugin_data['RequiresPlugins'] ) );

From ac5ed2d6c2d18cd633a4573ec1ff2054590b2664 Mon Sep 17 00:00:00 2001
From: Pascal Birchler <pascalb@google.com>
Date: Sun, 2 Nov 2025 11:36:49 +0100
Subject: [PATCH 8/8] Update tests

---
 features/plugin-dependencies.feature | 114 +++++++++++++++++++++------
 src/Plugin_Command.php               |  53 ++++++-------
 2 files changed, 111 insertions(+), 56 deletions(-)

diff --git a/features/plugin-dependencies.feature b/features/plugin-dependencies.feature
index 7f0d9f99..7b4b654b 100644
--- a/features/plugin-dependencies.feature
+++ b/features/plugin-dependencies.feature
@@ -3,35 +3,52 @@ Feature: Plugin dependencies support
   Background:
     Given an empty cache
 
+  @less-than-wp-6.5
+  Scenario: Install plugin with dependencies using --with-dependencies flag
+    Given a WP install
+
+    When I try `wp plugin install --with-dependencies bp-classic`
+    Then STDERR should contain:
+      """
+      Installing plugins with dependencies requires WordPress 6.5 or greater.
+      """
+
   @require-wp-6.5
   Scenario: Install plugin with dependencies using --with-dependencies flag
     Given a WP install
 
-    When I run `wp plugin install akismet`
+    When I run `wp plugin install --with-dependencies bp-classic`
     Then STDOUT should contain:
       """
-      Plugin installed successfully.
+      Installing BuddyPress
+      """
+    And STDOUT should contain:
+      """
+      Installing BP Classic
+      """
+    And STDOUT should contain:
+      """
+      Success: Installed 2 of 2 plugins.
       """
 
-    # Create a test plugin with dependencies
-    And a wp-content/plugins/test-plugin/test-plugin.php file:
+    When I run `wp plugin list --fields=name,status --format=csv`
+    Then STDOUT should contain:
       """
-      <?php
-      /**
-       * Plugin Name: Test Plugin
-       * Requires Plugins: akismet
-       */
+      buddypress,inactive
+      """
+    And STDOUT should contain:
+      """
+      bp-classic,inactive
       """
 
-    When I run `wp plugin delete akismet --quiet`
-    Then STDOUT should be empty
+  @less-than-wp-6.5
+  Scenario: Install dependencies of an installed plugin
+    Given a WP install
 
-    # Note: Testing with actual WP.org plugins that have dependencies would be better
-    # but we'll test with a local plugin that declares dependencies
-    When I run `wp plugin get test-plugin --field=requires_plugins`
-    Then STDOUT should be:
+    When I try `wp plugin install-dependencies akismet`
+    Then STDERR should contain:
       """
-      akismet
+      Installing plugin dependencies requires WordPress 6.5 or greater.
       """
 
   @require-wp-6.5
@@ -44,7 +61,7 @@ Feature: Plugin dependencies support
       <?php
       /**
        * Plugin Name: Test Plugin
-       * Requires Plugins: akismet, hello
+       * Requires Plugins: duplicate-post, debug-bar
        */
       """
 
@@ -80,31 +97,76 @@ Feature: Plugin dependencies support
       <?php
       /**
        * Plugin Name: Test Plugin
-       * Requires Plugins: hello
+       * Requires Plugins: akismet, buddypress
        */
       """
 
-    When I run `wp plugin install-dependencies test-plugin --activate`
+    When I try `wp plugin install-dependencies test-plugin --activate`
     Then STDOUT should contain:
       """
-      Installing 1 dependency for 'test-plugin'
+      Installing 2 dependencies for 'test-plugin'
       """
     And STDOUT should contain:
       """
-      Success:
+      Plugin 'buddypress' activated
+      """
+    And STDOUT should contain:
+      """
+      Success: Installed 1 of 2 plugins.
+      """
+    And STDERR should contain:
+      """
+      Warning: akismet: Plugin already installed.
       """
 
-    When I run `wp plugin list --name=hello --field=status`
-    Then STDOUT should be:
+    When I run `wp plugin list --fields=name,status --format=csv`
+    Then STDOUT should contain:
+      """
+      buddypress,active
+      """
+    And STDOUT should contain:
+      """
+      akismet,active
+      """
+    # Only the dependencies are activated, not the plugin itself.
+    And STDOUT should contain:
+      """
+      test-plugin,inactive
+      """
+
+  @require-wp-6.5
+  Scenario: Force install dependencies
+    Given a WP install
+
+    # Create a test plugin with dependencies
+    And a wp-content/plugins/test-plugin/test-plugin.php file:
+      """
+      <?php
+      /**
+       * Plugin Name: Test Plugin
+       * Requires Plugins: akismet
+       */
+      """
+
+    When I run `wp plugin install-dependencies test-plugin --force`
+    Then STDOUT should contain:
+      """
+      Installing 1 dependency for 'test-plugin'
+      """
+    And STDOUT should contain:
+      """
+      Installing Akismet
+      """
+    And STDOUT should contain:
       """
-      active
+      Success: Installed 1 of 1 plugins.
       """
+    And STDERR should be empty
 
   @require-wp-6.5
   Scenario: Install plugin with no dependencies
     Given a WP install
 
-    # Create a test plugin without dependencies
     And a wp-content/plugins/test-plugin/test-plugin.php file:
       """
       <?php
@@ -126,6 +188,6 @@ Feature: Plugin dependencies support
     When I try `wp plugin install-dependencies non-existent-plugin`
     Then STDERR should contain:
       """
-      Error:
+      Error: The 'non-existent-plugin' plugin could not be found.
       """
     And the return code should be 1
diff --git a/src/Plugin_Command.php b/src/Plugin_Command.php
index 9a5511b6..c42f3082 100644
--- a/src/Plugin_Command.php
+++ b/src/Plugin_Command.php
@@ -1095,6 +1095,9 @@ public function install( $args, $assoc_args ) {
 
 		// If --with-dependencies is set, we need to handle dependencies
 		if ( Utils\get_flag_value( $assoc_args, 'with-dependencies', false ) ) {
+			if ( WP_CLI\Utils\wp_version_compare( '6.5', '<' ) ) {
+				WP_CLI::error( 'Installing plugins with dependencies requires WordPress 6.5 or greater.' );
+			}
 			$this->install_with_dependencies( $args, $assoc_args );
 		} else {
 			parent::install( $args, $assoc_args );
@@ -1167,27 +1170,21 @@ private function collect_dependencies( $slug, &$all_to_install, &$installed_trac
 	/**
 	 * Gets the dependencies for a plugin.
 	 *
-	 * Uses WP_Plugin_Dependencies class if available (WordPress 6.5+),
-	 * otherwise falls back to WordPress.org API.
-	 *
 	 * @param string $slug Plugin slug.
 	 * @return array Array of dependency slugs.
 	 */
 	private function get_plugin_dependencies( $slug ) {
-		// Try to use WP_Plugin_Dependencies class if available (WordPress 6.5+)
-		if ( class_exists( 'WP_Plugin_Dependencies' ) ) {
-			// Find the plugin file for this slug
-			$plugins = get_plugins();
-			foreach ( $plugins as $plugin_file => $plugin_data ) {
-				$plugin_slug = dirname( $plugin_file );
-				if ( '.' === $plugin_slug ) {
-					$plugin_slug = basename( $plugin_file, '.php' );
-				}
+		// Find the plugin file for this slug
+		$plugins = get_plugins();
+		foreach ( $plugins as $plugin_file => $plugin_data ) {
+			$plugin_slug = dirname( $plugin_file );
+			if ( '.' === $plugin_slug ) {
+				$plugin_slug = basename( $plugin_file, '.php' );
+			}
 
-				if ( $plugin_slug === $slug ) {
-					WP_Plugin_Dependencies::initialize();
-					return WP_Plugin_Dependencies::get_dependencies( $plugin_file );
-				}
+			if ( $plugin_slug === $slug ) {
+				WP_Plugin_Dependencies::initialize();
+				return WP_Plugin_Dependencies::get_dependencies( $plugin_file );
 			}
 		}
 
@@ -1518,6 +1515,10 @@ public function is_active( $args, $assoc_args ) {
 	 * [--activate-network]
 	 * : If set, dependencies will be network activated immediately after install.
 	 *
+	 * [--force]
+	 * : If set, the command will overwrite any installed version of the plugin, without prompting
+	 * for confirmation.
+	 *
 	 * ## EXAMPLES
 	 *
 	 *     # Install all dependencies of an installed plugin
@@ -1531,25 +1532,17 @@ public function is_active( $args, $assoc_args ) {
 	 * @subcommand install-dependencies
 	 */
 	public function install_dependencies( $args, $assoc_args ) {
+		if ( WP_CLI\Utils\wp_version_compare( '6.5', '<' ) ) {
+			WP_CLI::error( 'Installing plugin dependencies requires WordPress 6.5 or greater.' );
+		}
+
 		$plugin = $this->fetcher->get_check( $args[0] );
 		$file   = $plugin->file;
 
-		// Get dependencies using WP_Plugin_Dependencies if available (WordPress 6.5+)
 		$dependencies = [];
 
-		if ( class_exists( 'WP_Plugin_Dependencies' ) ) {
-			WP_Plugin_Dependencies::initialize();
-			// Initialize WP_Plugin_Dependencies
-			$dependencies = WP_Plugin_Dependencies::get_dependencies( $file );
-		} else {
-			// Fallback: Get dependencies from plugin header manually
-			$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $file, false, false );
-
-			if ( ! empty( $plugin_data['RequiresPlugins'] ) ) {
-				// Parse the comma-separated list
-				$dependencies = array_map( 'trim', explode( ',', $plugin_data['RequiresPlugins'] ) );
-			}
-		}
+		WP_Plugin_Dependencies::initialize();
+		$dependencies = WP_Plugin_Dependencies::get_dependencies( $file );
 
 		if ( empty( $dependencies ) ) {
 			WP_CLI::success( "Plugin '{$args[0]}' has no dependencies." );