diff --git a/src/Command/ExtractCommand.php b/src/Command/ExtractCommand.php
index 8498294..f69082a 100644
--- a/src/Command/ExtractCommand.php
+++ b/src/Command/ExtractCommand.php
@@ -3,9 +3,14 @@
 
 use modmore\Gitify\BaseCommand;
 use modmore\Gitify\Gitify;
+use modTransportPackage;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+use xPDOTransport;
 
 /**
  * Class BuildCommand
@@ -32,6 +37,13 @@ protected function configure()
                 InputArgument::IS_ARRAY | InputArgument::OPTIONAL,
                 'Specify the data partition key (folder name), or keys separated by a space, that you want to extract. '
             )
+            ->addOption(
+                'packages',
+                'p',
+                InputOption::VALUE_NEGATABLE,
+                'Skip extracting installed package when set.',
+                true
+            )
         ;
     }
 
@@ -77,6 +89,10 @@ protected function execute(InputInterface $input, OutputInterface $output)
             }
         }
 
+        if ($input->getOption('packages')) {
+            $this->extractPackages();
+        }
+
         $output->writeln('Done! ' . $this->getRunStats());
         return 0;
     }
@@ -447,4 +463,55 @@ protected function filterPathSegment($path)
         }
         return \modResource::filterPathSegment($this->modx, $path, $options);
     }
+
+    private function extractPackages(): void
+    {
+        $this->output->writeln('<info>Extracting installed packages...</info>');
+        $file = GITIFY_WORKING_DIR . '.gitify';
+        $data = Yaml::parseFile($file);
+
+        $result = $this->modx->call('transport.modTransportPackage', 'listPackages', [
+            &$this->modx,
+            1,
+            0,
+            0,
+            ''
+        ]);
+
+        $providers = [];
+        /** @var modTransportPackage $package */
+        foreach ($result['collection'] as $package) {
+            $signature = $package->get('signature');
+            $sig = xPDOTransport::parseSignature($signature);
+
+            if (!$provider = $package->getOne('Provider')) {
+                $this->output->writeln("- <comment>Package {$sig[0]} is not assigned to a provider, skipping</comment>");
+                continue;
+            }
+
+            $providerKey = $provider->get('name');
+            if (!isset($providers[$providerKey])) {
+                $providers[$providerKey] = [
+                    'service_url' => $provider->get('service_url')
+                ];
+                if ($provider->get('description')) {
+                    $providers[$providerKey]['description'] = $provider->get('description');
+                }
+                if ($provider->get('username')) {
+                    $providers[$providerKey]['username'] = $provider->get('username');
+                }
+                if ($provider->get('api_key') && !file_exists(GITIFY_WORKING_DIR . '.' . $providerKey . '.key')) {
+                    $key = $provider->get('api_key');
+                    file_put_contents(GITIFY_WORKING_DIR . '.' . $providerKey . '.key', $key);
+                    $providers[$providerKey]['api_key'] = '.' . $providerKey . '.key';
+                }
+            }
+
+            $providers[$providerKey]['packages'][] = $signature;
+        }
+        $data['packages'] = $providers;
+
+        file_put_contents($file, Gitify::toYAML($data));
+        $this->output->writeln('<info>Packages updated.</info>');
+    }
 }
diff --git a/src/Command/InstallPackageCommand.php b/src/Command/InstallPackageCommand.php
index 843d1e2..ddec644 100644
--- a/src/Command/InstallPackageCommand.php
+++ b/src/Command/InstallPackageCommand.php
@@ -9,6 +9,7 @@
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Question\ChoiceQuestion;
 use Symfony\Component\Console\Question\ConfirmationQuestion;
+use xPDOTransport;
 
 /**
  * Class InstallPackageCommand
@@ -235,6 +236,37 @@ private function install($package, $provider = 0, array $installOptions = [])
             return false;
         }
 
+        $verbosity = $this->input->getOption('all') ? OutputInterface::VERBOSITY_VERBOSE : OutputInterface::VERBOSITY_NORMAL;
+
+        $installed = $this->modx->getObject('transport.modTransportPackage', [
+            'signature' => $package,
+            'provider' => $provider->get('id'),
+        ]);
+        if ($installed) {
+            $this->output->writeln("- <info>$package</info> is already installed, skipping", $verbosity);
+            return true;
+        }
+
+        [$name, $version] = xPDOTransport::parseSignature($package);
+        $c = $this->modx->newQuery('transport.modTransportPackage');
+        $c->where([
+            'provider' => $provider->get('id'),
+            'signature:LIKE' => $name . '-%',
+        ]);
+        $c->sortby('installed', 'DESC'); // @todo is this sufficient to get highest installed version
+
+        /** @var \modTransportPackage $lastVersion */
+        $lastVersion = $this->modx->getObject('transport.modTransportPackage', $c);
+        if ($lastVersion) {
+            $sig = xPDOTransport::parseSignature($lastVersion->get('signature'));
+            $installedVersion = $sig[1];
+
+            if (version_compare($installedVersion, $version, '>=')) {
+                $this->output->writeln("- <info>$package</info>, found higher version {$installedVersion} already installed", $verbosity);
+                return true;
+            }
+        }
+
         // Download and install the package from the chosen provider
         $completed = $this->download($package, $provider, $installOptions);
         if (!$completed) {
@@ -482,6 +514,7 @@ private function download($packageName, $provider, $options = []) {
 
                 // Grab the package object
                 $obj = $response->getObject();
+                /** @var \modTransportPackage $package */
                 if ($package = $this->modx->getObject('transport.modTransportPackage', ['signature' => $obj['signature']])) {
                     // Install the package
                     return $package->install($options);