Marketplace package catalogue

* Modules, themes, and extensions
* Publisher profiles and verification metadata
* Installed-package tracking
* Semantic version compatibility checks
* PHP, Laravel, and Content Manager compatibility checks
* Dependency resolution
* SHA-256 checksum validation
* Package signature requirements
* Installation and update history
* Enable and disable controls
* Removal handling
* Rollback records
* Licence records
* Marketplace administration UI
* Authenticated REST endpoints
* Console audit and synchronisation commands
* Permissions and sidebar integration
* Feature tests

Modules/Marketplace/Services/CompatibilityChecker.php

@@ -0,0 +1,17 @@
+<?php
+namespace Modules\Marketplace\Services;
+use Illuminate\Support\Facades\App;
+final class CompatibilityChecker
+{
+    public function __construct(private VersionConstraint $constraints=new VersionConstraint()) {}
+    public function check(array $manifest): array
+    {
+        $errors=[];
+        $php=(string)($manifest['php'] ?? '*'); $laravel=(string)($manifest['laravel'] ?? '*');
+        $platform=(string)($manifest['content_manager'] ?? '*'); $platformVersion=(string) config('app.version','1.0.0');
+        if (!$this->constraints->matches(PHP_VERSION,$php)) $errors[]="Requires PHP $php; running ".PHP_VERSION.'.';
+        if (!$this->constraints->matches(App::version(),$laravel)) $errors[]="Requires Laravel $laravel; running ".App::version().'.';
+        if (!$this->constraints->matches($platformVersion,$platform)) $errors[]="Requires Content Manager $platform; running $platformVersion.";
+        return ['compatible'=>$errors===[],'errors'=>$errors];
+    }
+}