feat(modules): harden module platform with event constants, validation checks, and CLI improvements

- Add ModuleEvents constants class with all 8 event strings; update dispatch call sites
- ValidateCommand: check AuthorizationPolicy container registration (check 20)
- ValidateCommand: warn on unknown event_listeners keys (check 21)
- make:module --simple flag for minimal manifests
- module:deactivate reverse-dependency warning
- 12 new PHPUnit tests covering all improvements

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/App/Module/ModuleEvents.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MintyPHP\App\Module;
+
+/**
+ * Central registry of all module event names dispatched by core.
+ *
+ * Modules reference these constants in their event_listeners manifest declarations
+ * and in listener implementations. ValidateCommand warns on unknown event names.
+ */
+final class ModuleEvents
+{
+    public const USER_LOGIN = 'user.login';
+    public const USER_LOGOUT = 'user.logout';
+    public const USER_CREATED = 'user.created';
+    public const USER_DELETED = 'user.deleted';
+    public const USER_ACTIVATED = 'user.activated';
+    public const USER_DEACTIVATED = 'user.deactivated';
+    public const USER_ASSIGNMENT_CHANGED = 'user.assignment_changed';
+    public const SCHEDULER_JOB_FAILED = 'scheduler.job_failed';
+
+    /** @return list<string> */
+    public static function all(): array
+    {
+        return [
+            self::USER_LOGIN,
+            self::USER_LOGOUT,
+            self::USER_CREATED,
+            self::USER_DELETED,
+            self::USER_ACTIVATED,
+            self::USER_DEACTIVATED,
+            self::USER_ASSIGNMENT_CHANGED,
+            self::SCHEDULER_JOB_FAILED,
+        ];
+    }
+
+    private function __construct()
+    {
+    }
+}

core/Console/Commands/Make/ModuleCommand.php

@@ -35,17 +35,22 @@ final class ModuleCommand extends Command
     public function usage(): string
     {
         return <<<'USAGE'
-        Usage: php bin/console make:module <module-id>
+        Usage: php bin/console make:module <module-id> [--simple]
 
         Arguments:
           module-id    Lowercase identifier (e.g. notifications, activity-log)
                        Must match [a-z][a-z0-9-]* pattern.
 
+        Options:
+          --simple     Generate a minimal manifest with only essential fields.
+                       Ideal for lightweight UI-only modules.
+
         Example:
           php bin/console make:module notifications
+          php bin/console make:module help-panel --simple
 
         Generates the full module directory structure with:
-          - module.php manifest (all fields, sensible defaults)
+          - module.php manifest (all fields or minimal with --simple)
           - ContainerRegistrar stub
           - AuthorizationPolicy stub
           - Empty pages/, templates/, web/css/, web/js/, tests/ directories
@@ -96,8 +101,11 @@ final class ModuleCommand extends Command
         }
 
         // Generate files
+        $simple = $options['simple'] ?? false;
         $files = [
-            'module.php' => self::manifestTemplate($moduleId, $pascalName, $snakeName),
+            'module.php' => $simple
+                ? self::simpleManifestTemplate($moduleId, $pascalName)
+                : self::manifestTemplate($moduleId, $pascalName, $snakeName),
             "lib/Module/{$pascalName}/{$pascalName}ContainerRegistrar.php" => self::registrarTemplate($pascalName),
             "lib/Module/{$pascalName}/{$pascalName}AuthorizationPolicy.php" => self::policyTemplate($pascalName, $snakeName),
         ];
@@ -199,6 +207,37 @@ final class ModuleCommand extends Command
         PHP;
     }
 
+    private static function simpleManifestTemplate(string $id, string $pascalName): string
+    {
+        $registrarClass = "\\MintyPHP\\Module\\{$pascalName}\\{$pascalName}ContainerRegistrar::class";
+        $policyClass = "\\MintyPHP\\Module\\{$pascalName}\\{$pascalName}AuthorizationPolicy::class";
+
+        return <<<PHP
+        <?php
+
+        /**
+         * {$pascalName} module manifest (minimal).
+         *
+         * Extend with routes, permissions, ui_slots, etc. as needed.
+         * See docs/howto-modul-erstellen.md for all available fields.
+         */
+        return [
+            'id' => '{$id}',
+            'version' => '0.1.0',
+            'enabled_by_default' => false,
+            'load_order' => 100,
+            'requires' => [],
+            'container_registrars' => [
+                {$registrarClass},
+            ],
+            'authorization_policies' => [
+                {$policyClass},
+            ],
+        ];
+
+        PHP;
+    }
+
     private static function registrarTemplate(string $pascalName): string
     {
         return <<<PHP

core/Console/Commands/Module/ValidateCommand.php

@@ -8,6 +8,7 @@ use MintyPHP\App\Module\Contracts\LayoutContextProvider;
 use MintyPHP\App\Module\Contracts\ModuleDeactivationHandler;
 use MintyPHP\App\Module\Contracts\SearchResourceProvider;
 use MintyPHP\App\Module\Contracts\SessionProvider;
+use MintyPHP\App\Module\ModuleEvents;
 use MintyPHP\App\Module\ModuleManifestLoader;
 use MintyPHP\Console\Command;
 use MintyPHP\Service\Access\AuthorizationPolicyInterface;
@@ -292,9 +293,63 @@ final class ValidateCommand extends Command
             }
         }
 
+        // 20. AuthorizationPolicy classes referenced in ContainerRegistrar source
+        $registrarSources = $this->loadRegistrarSources($moduleDir, $manifest->containerRegistrars);
+        foreach ($manifest->authorizationPolicies as $policyClass) {
+            if (!class_exists($policyClass)) {
+                continue; // Already reported by check 9
+            }
+            $shortName = (new \ReflectionClass($policyClass))->getShortName();
+            $found = false;
+            foreach ($registrarSources as $source) {
+                if (str_contains($source, $shortName)) {
+                    $found = true;
+                    break;
+                }
+            }
+            if (!$found) {
+                $warnings[] = "AuthorizationPolicy '{$shortName}' is not referenced in any ContainerRegistrar — may not be registered in the container";
+            }
+        }
+
+        // 21. Event listener keys reference known events
+        $knownEvents = ModuleEvents::all();
+        foreach ($manifest->eventListeners as $eventName => $handlers) {
+            if (!in_array($eventName, $knownEvents, true)) {
+                $warnings[] = "Event listener subscribes to unknown event '{$eventName}' — not defined in ModuleEvents";
+            }
+        }
+
         return [$errors, $warnings];
     }
 
+    /**
+     * @param list<class-string> $registrarClasses
+     * @return list<string> Source code of each registrar file
+     */
+    private function loadRegistrarSources(string $moduleDir, array $registrarClasses): array
+    {
+        $sources = [];
+        foreach ($registrarClasses as $class) {
+            if (!class_exists($class)) {
+                continue;
+            }
+            try {
+                $refClass = new \ReflectionClass($class);
+                $file = $refClass->getFileName();
+                if ($file !== false && is_file($file)) {
+                    $content = file_get_contents($file);
+                    if ($content !== false) {
+                        $sources[] = $content;
+                    }
+                }
+            } catch (\ReflectionException) {
+                // Skip unresolvable classes
+            }
+        }
+        return $sources;
+    }
+
     /**
      * @param list<string> &$errors
      */

core/Console/Runner/Module/ModuleRunner.php

@@ -227,25 +227,31 @@ final class ModuleRunner implements ModuleRunnerInterface
                 return 1;
             }
 
-            $manifest = ModuleManifestLoader::loadFromDisk(
+            $modulesDir = ModuleCliRuntime::projectRoot() . '/modules';
-                ModuleCliRuntime::projectRoot() . '/modules',
+            $manifest = ModuleManifestLoader::loadFromDisk($modulesDir, $moduleId);
-                $moduleId
+
-            );
+            // Check for reverse dependencies (other modules that require this one)
+            $dependents = $this->findReverseDependencies($modulesDir, $moduleId);
+            $warning = '';
+            if ($dependents !== []) {
+                $dependentList = implode(', ', $dependents);
+                $warning = "Warning: module(s) [{$dependentList}] declare '{$moduleId}' in their requires — deactivation may break them.\n";
+            }
 
             $handlerClass = $manifest->deactivationHandler;
             if ($handlerClass === null) {
-                $message = "Module '{$moduleId}' has no deactivation_handler declared — nothing to do.";
+                $message = $warning . "Module '{$moduleId}' has no deactivation_handler declared — nothing to do.";
                 return 0;
             }
 
             if (!class_exists($handlerClass)) {
-                $message = "Error: deactivation handler class '{$handlerClass}' not found.";
+                $message = $warning . "Error: deactivation handler class '{$handlerClass}' not found.";
                 return 1;
             }
 
             $container = $GLOBALS['minty_app_container'] ?? null;
             if (!$container instanceof AppContainer) {
-                $message = 'Error: app container is not initialized.';
+                $message = $warning . 'Error: app container is not initialized.';
                 return 1;
             }
             $handler = $container->has($handlerClass)
@@ -253,17 +259,17 @@ final class ModuleRunner implements ModuleRunnerInterface
                 : new $handlerClass();
 
             if (!$handler instanceof ModuleDeactivationHandler) {
-                $message = "Error: '{$handlerClass}' does not implement ModuleDeactivationHandler.";
+                $message = $warning . "Error: '{$handlerClass}' does not implement ModuleDeactivationHandler.";
                 return 1;
             }
 
             if ($dryRun) {
-                $message = "Dry-run: handler '{$handlerClass}' found and valid for module '{$moduleId}'.";
+                $message = $warning . "Dry-run: handler '{$handlerClass}' found and valid for module '{$moduleId}'.";
                 return 0;
             }
 
             $handler->deactivate($container);
-            $message = "Deactivation handler for module '{$moduleId}' completed.";
+            $message = $warning . "Deactivation handler for module '{$moduleId}' completed.";
 
             return 0;
         });
@@ -345,4 +351,34 @@ final class ModuleRunner implements ModuleRunnerInterface
             'message' => $step['error'] ?? $message,
         ];
     }
+
+    /**
+     * @return list<string> Module IDs that declare $targetId in their requires
+     */
+    private function findReverseDependencies(string $modulesDir, string $targetId): array
+    {
+        $dependents = [];
+        $entries = is_dir($modulesDir) ? (scandir($modulesDir) ?: []) : [];
+
+        foreach ($entries as $entry) {
+            if ($entry === '.' || $entry === '..' || $entry === $targetId) {
+                continue;
+            }
+            $manifestFile = $modulesDir . '/' . $entry . '/module.php';
+            if (!is_file($manifestFile)) {
+                continue;
+            }
+            try {
+                $manifest = ModuleManifestLoader::loadFromDisk($modulesDir, $entry);
+                if (in_array($targetId, $manifest->requires, true)) {
+                    $dependents[] = $entry;
+                }
+            } catch (\Throwable) {
+                // Skip unparseable manifests
+            }
+        }
+
+        sort($dependents);
+        return $dependents;
+    }
 }

core/Service/Auth/AuthService.php

@@ -3,6 +3,7 @@
 namespace MintyPHP\Service\Auth;
 
 use MintyPHP\App\Module\ModuleEventDispatcher;
+use MintyPHP\App\Module\ModuleEvents;
 use MintyPHP\Auth;
 use MintyPHP\Http\SessionStoreInterface;
 use MintyPHP\Repository\User\UserReadRepositoryInterface;
@@ -132,7 +133,7 @@ class AuthService
             'actor_tenant_id' => $this->currentTenantIdFromSession(),
         ]);
 
-        $this->eventDispatcher?->dispatch('user.login', [
+        $this->eventDispatcher?->dispatch(ModuleEvents::USER_LOGIN, [
             'user_id' => $userId,
             'provider' => 'local',
         ]);
@@ -226,7 +227,7 @@ class AuthService
             'metadata' => ['provider' => $loginProvider],
         ]);
 
-        $this->eventDispatcher?->dispatch('user.login', [
+        $this->eventDispatcher?->dispatch(ModuleEvents::USER_LOGIN, [
             'user_id' => $userId,
             'provider' => $loginProvider,
         ]);
@@ -290,7 +291,7 @@ class AuthService
         $actorUserId = (int) ($this->sessionUser()['id'] ?? 0);
         $actorTenantId = $this->currentTenantIdFromSession();
 
-        $this->eventDispatcher?->dispatch('user.logout', [
+        $this->eventDispatcher?->dispatch(ModuleEvents::USER_LOGOUT, [
             'user_id' => $actorUserId,
         ]);
 

core/Service/Scheduler/SchedulerRunService.php

@@ -3,6 +3,7 @@
 namespace MintyPHP\Service\Scheduler;
 
 use MintyPHP\App\Module\ModuleEventDispatcher;
+use MintyPHP\App\Module\ModuleEvents;
 use MintyPHP\Domain\Taxonomy\ScheduledJobRunStatus;
 use MintyPHP\Domain\Taxonomy\ScheduledJobTriggerType;
 use MintyPHP\Domain\Taxonomy\SchedulerRuntimeResult;
@@ -423,7 +424,7 @@ class SchedulerRunService
         }
 
         try {
-            $this->eventDispatcher->dispatch('scheduler.job_failed', [
+            $this->eventDispatcher->dispatch(ModuleEvents::SCHEDULER_JOB_FAILED, [
                 'job_id' => (int) ($job['id'] ?? 0),
                 'job_key' => (string) ($job['job_key'] ?? ''),
                 'label' => (string) ($job['label'] ?? ''),

core/Service/User/UserAccountService.php

@@ -3,6 +3,7 @@
 namespace MintyPHP\Service\User;
 
 use MintyPHP\App\Module\ModuleEventDispatcher;
+use MintyPHP\App\Module\ModuleEvents;
 use MintyPHP\I18n;
 use MintyPHP\Repository\Support\DatabaseSessionRepository;
 use MintyPHP\Repository\User\UserListQueryRepositoryInterface;
@@ -118,7 +119,7 @@ class UserAccountService
             'target_uuid' => (string) ($user['uuid'] ?? ''),
         ]);
 
-        $this->eventDispatcher?->dispatch('user.deleted', [
+        $this->eventDispatcher?->dispatch(ModuleEvents::USER_DELETED, [
             'user_id' => $userId,
             'uuid' => (string) ($user['uuid'] ?? ''),
             'actor_user_id' => $currentUserId,
@@ -191,7 +192,7 @@ class UserAccountService
         ]);
 
         foreach ($deletedUsers as $deletedUser) {
-            $this->eventDispatcher?->dispatch('user.deleted', [
+            $this->eventDispatcher?->dispatch(ModuleEvents::USER_DELETED, [
                 'user_id' => (int) $deletedUser['id'],
                 'uuid' => (string) $deletedUser['uuid'],
                 'actor_user_id' => $currentUserId,
@@ -336,7 +337,7 @@ class UserAccountService
             ],
         ]);
 
-        $this->eventDispatcher?->dispatch('user.created', [
+        $this->eventDispatcher?->dispatch(ModuleEvents::USER_CREATED, [
             'user_id' => $userId,
             'uuid' => is_string($uuid) ? $uuid : '',
             'actor_user_id' => $currentUserId,
@@ -467,7 +468,7 @@ class UserAccountService
             $tenantIds = $this->extractTenantIdsFromAssignments(
                 $this->safeAssignmentsForUser($userId)
             );
-            $eventType = ((int) $form['active'] === 1) ? 'user.activated' : 'user.deactivated';
+            $eventType = ((int) $form['active'] === 1) ? ModuleEvents::USER_ACTIVATED : ModuleEvents::USER_DEACTIVATED;
             $this->eventDispatcher?->dispatch($eventType, [
                 'user_id' => $userId,
                 'uuid' => (string) ($existing['uuid'] ?? ''),
@@ -521,7 +522,7 @@ class UserAccountService
         $tenantIds = $this->extractTenantIdsFromAssignments(
             $this->safeAssignmentsForUser($userId)
         );
-        $this->eventDispatcher?->dispatch($active ? 'user.activated' : 'user.deactivated', [
+        $this->eventDispatcher?->dispatch($active ? ModuleEvents::USER_ACTIVATED : ModuleEvents::USER_DEACTIVATED, [
             'user_id' => $userId,
             'uuid' => (string) ($user['uuid'] ?? ''),
             'display_name' => trim((string) ($user['display_name'] ?? '')),
@@ -587,7 +588,7 @@ class UserAccountService
             $tenantIds = $this->extractTenantIdsFromAssignments(
                 $this->safeAssignmentsForUser($targetUserId)
             );
-            $this->eventDispatcher?->dispatch($active ? 'user.activated' : 'user.deactivated', [
+            $this->eventDispatcher?->dispatch($active ? ModuleEvents::USER_ACTIVATED : ModuleEvents::USER_DEACTIVATED, [
                 'user_id' => $targetUserId,
                 'uuid' => (string) ($user['uuid'] ?? ''),
                 'display_name' => trim((string) ($user['display_name'] ?? '')),
@@ -801,7 +802,7 @@ class UserAccountService
             return;
         }
 
-        $this->eventDispatcher?->dispatch('user.assignment_changed', [
+        $this->eventDispatcher?->dispatch(ModuleEvents::USER_ASSIGNMENT_CHANGED, [
             'user_id' => $userId,
             'uuid' => (string) ($user['uuid'] ?? ''),
             'display_name' => trim((string) ($user['display_name'] ?? '')),

tests/App/Module/ModuleEventsTest.php

@@ -0,0 +1,69 @@
+<?php
+
+namespace MintyPHP\Tests\App\Module;
+
+use MintyPHP\App\Module\ModuleEvents;
+use PHPUnit\Framework\TestCase;
+
+final class ModuleEventsTest extends TestCase
+{
+    public function testAllConstantsAreReturnedByAll(): void
+    {
+        $reflection = new \ReflectionClass(ModuleEvents::class);
+        $constants = $reflection->getConstants();
+
+        self::assertNotEmpty($constants, 'ModuleEvents should define at least one constant');
+        self::assertSame(
+            array_values($constants),
+            ModuleEvents::all(),
+            'ModuleEvents::all() must return exactly the values of all class constants'
+        );
+    }
+
+    public function testConstantValuesMatchExpectedEventStrings(): void
+    {
+        self::assertSame('user.login', ModuleEvents::USER_LOGIN);
+        self::assertSame('user.logout', ModuleEvents::USER_LOGOUT);
+        self::assertSame('user.created', ModuleEvents::USER_CREATED);
+        self::assertSame('user.deleted', ModuleEvents::USER_DELETED);
+        self::assertSame('user.activated', ModuleEvents::USER_ACTIVATED);
+        self::assertSame('user.deactivated', ModuleEvents::USER_DEACTIVATED);
+        self::assertSame('user.assignment_changed', ModuleEvents::USER_ASSIGNMENT_CHANGED);
+        self::assertSame('scheduler.job_failed', ModuleEvents::SCHEDULER_JOB_FAILED);
+    }
+
+    public function testAllReturnsUniqueValues(): void
+    {
+        $all = ModuleEvents::all();
+        self::assertSame($all, array_unique($all), 'ModuleEvents::all() must not contain duplicates');
+    }
+
+    public function testClassIsNotInstantiable(): void
+    {
+        $reflection = new \ReflectionClass(ModuleEvents::class);
+        self::assertFalse($reflection->isInstantiable(), 'ModuleEvents should not be instantiable');
+    }
+
+    public function testDispatchCallSitesUseConstants(): void
+    {
+        $root = dirname(__DIR__, 3);
+        $files = [
+            $root . '/core/Service/Auth/AuthService.php',
+            $root . '/core/Service/User/UserAccountService.php',
+            $root . '/core/Service/Scheduler/SchedulerRunService.php',
+        ];
+
+        foreach ($files as $file) {
+            $content = file_get_contents($file);
+            self::assertIsString($content, "Could not read {$file}");
+
+            // Ensure no raw string dispatch calls remain (except in ternaries which use constants)
+            preg_match_all('/->dispatch\(\s*[\'"]([^"\']+)[\'"]\s*,/', $content, $matches);
+            self::assertSame(
+                [],
+                $matches[1],
+                basename($file) . ' still uses raw string event names: ' . implode(', ', $matches[1])
+            );
+        }
+    }
+}

tests/Console/MakeModuleCommandTest.php

@@ -0,0 +1,109 @@
+<?php
+
+namespace MintyPHP\Tests\Console;
+
+use MintyPHP\Console\Commands\Make\ModuleCommand;
+use PHPUnit\Framework\TestCase;
+
+final class MakeModuleCommandTest extends TestCase
+{
+    private string $modulesDir;
+
+    /** @var list<string> Module IDs to clean up */
+    private array $cleanup = [];
+
+    protected function setUp(): void
+    {
+        $this->modulesDir = dirname(__DIR__, 2) . '/modules';
+    }
+
+    protected function tearDown(): void
+    {
+        foreach ($this->cleanup as $id) {
+            $this->removeDir($this->modulesDir . '/' . $id);
+        }
+    }
+
+    public function testSimpleFlagGeneratesMinimalManifest(): void
+    {
+        $id = 'ztest-simple-scaffold';
+        $this->cleanup[] = $id;
+
+        $command = new ModuleCommand();
+        $exitCode = @$command->execute([$id], ['simple' => true]);
+
+        self::assertSame(0, $exitCode);
+
+        $manifestFile = $this->modulesDir . '/' . $id . '/module.php';
+        self::assertFileExists($manifestFile);
+
+        $manifest = require $manifestFile;
+        self::assertIsArray($manifest);
+
+        // Essential fields present
+        self::assertSame($id, $manifest['id']);
+        self::assertSame('0.1.0', $manifest['version']);
+        self::assertArrayHasKey('container_registrars', $manifest);
+        self::assertArrayHasKey('authorization_policies', $manifest);
+
+        // Verbose fields NOT present in simple mode
+        self::assertArrayNotHasKey('routes', $manifest);
+        self::assertArrayNotHasKey('ui_slots', $manifest);
+        self::assertArrayNotHasKey('permissions', $manifest);
+        self::assertArrayNotHasKey('scheduler_jobs', $manifest);
+        self::assertArrayNotHasKey('event_listeners', $manifest);
+    }
+
+    public function testDefaultModeGeneratesFullManifest(): void
+    {
+        $id = 'ztest-full-scaffold';
+        $this->cleanup[] = $id;
+
+        $command = new ModuleCommand();
+        $exitCode = @$command->execute([$id], []);
+
+        self::assertSame(0, $exitCode);
+
+        $manifestFile = $this->modulesDir . '/' . $id . '/module.php';
+        $manifest = require $manifestFile;
+
+        // Full mode includes all fields
+        self::assertArrayHasKey('routes', $manifest);
+        self::assertArrayHasKey('ui_slots', $manifest);
+        self::assertArrayHasKey('permissions', $manifest);
+        self::assertArrayHasKey('event_listeners', $manifest);
+    }
+
+    public function testSimpleManifestIsValidForManifestLoader(): void
+    {
+        $id = 'ztest-simple-valid';
+        $this->cleanup[] = $id;
+
+        $command = new ModuleCommand();
+        $exitCode = @$command->execute([$id], ['simple' => true]);
+        self::assertSame(0, $exitCode);
+
+        $manifest = \MintyPHP\App\Module\ModuleManifestLoader::loadFromDisk($this->modulesDir, $id);
+        self::assertSame($id, $manifest->id);
+        self::assertSame('0.1.0', $manifest->version);
+    }
+
+    private function removeDir(string $dir): void
+    {
+        if (!is_dir($dir)) {
+            return;
+        }
+        $items = new \RecursiveIteratorIterator(
+            new \RecursiveDirectoryIterator($dir, \FilesystemIterator::SKIP_DOTS),
+            \RecursiveIteratorIterator::CHILD_FIRST
+        );
+        foreach ($items as $item) {
+            if ($item->isDir()) {
+                rmdir($item->getPathname());
+            } else {
+                unlink($item->getPathname());
+            }
+        }
+        rmdir($dir);
+    }
+}

tests/Console/ValidateCommandTest.php

@@ -0,0 +1,227 @@
+<?php
+
+namespace MintyPHP\Tests\Console;
+
+use MintyPHP\Console\Commands\Module\ValidateCommand;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Tests for module:validate enhancements:
+ * - AuthorizationPolicy container-registration check (check 20)
+ * - Event listener unknown event warning (check 21)
+ *
+ * Uses reflection to call the private validateModule() method directly,
+ * avoiding bootstrapApp() and STDOUT capture issues.
+ */
+final class ValidateCommandTest extends TestCase
+{
+    private string $modulesDir;
+
+    /** @var list<string> Module IDs to clean up */
+    private array $cleanup = [];
+
+    private \ReflectionMethod $validateModule;
+    private ValidateCommand $command;
+
+    protected function setUp(): void
+    {
+        $this->modulesDir = dirname(__DIR__, 2) . '/modules';
+        $this->command = new ValidateCommand();
+        $this->validateModule = new \ReflectionMethod($this->command, 'validateModule');
+    }
+
+    protected function tearDown(): void
+    {
+        foreach ($this->cleanup as $id) {
+            $this->removeDir($this->modulesDir . '/' . $id);
+        }
+    }
+
+    public function testValidateWarnsOnUnknownEventListenerKey(): void
+    {
+        $id = 'ztest-unknown-event';
+        $this->scaffoldModule($id, <<<'PHP'
+        <?php
+        return [
+            'id' => 'ztest-unknown-event',
+            'version' => '0.1.0',
+            'event_listeners' => [
+                'user.created' => [
+                    ['class' => 'NonExistent\Listener', 'method' => 'handle'],
+                ],
+                'totally.unknown.event' => [
+                    ['class' => 'NonExistent\Listener', 'method' => 'handle'],
+                ],
+            ],
+        ];
+        PHP);
+
+        [$errors, $warnings] = $this->validateModule->invoke($this->command, $this->modulesDir, $id);
+
+        $warningText = implode("\n", $warnings);
+        self::assertStringContainsString('totally.unknown.event', $warningText);
+        self::assertStringContainsString('not defined in ModuleEvents', $warningText);
+        // user.created is a known event — should NOT trigger a warning
+        self::assertStringNotContainsString("unknown event 'user.created'", $warningText);
+    }
+
+    public function testValidateDoesNotWarnOnKnownEventKeys(): void
+    {
+        $id = 'ztest-known-events';
+        $this->scaffoldModule($id, <<<'PHP'
+        <?php
+        return [
+            'id' => 'ztest-known-events',
+            'version' => '0.1.0',
+            'event_listeners' => [
+                'user.created' => [
+                    ['class' => 'NonExistent\Listener', 'method' => 'handle'],
+                ],
+                'scheduler.job_failed' => [
+                    ['class' => 'NonExistent\Listener', 'method' => 'handle'],
+                ],
+            ],
+        ];
+        PHP);
+
+        [$errors, $warnings] = $this->validateModule->invoke($this->command, $this->modulesDir, $id);
+
+        $warningText = implode("\n", $warnings);
+        self::assertStringNotContainsString('not defined in ModuleEvents', $warningText);
+    }
+
+    public function testValidateWarnsWhenPolicyNotReferencedInRegistrar(): void
+    {
+        $id = 'ztest-policy-missing';
+        $moduleDir = $this->modulesDir . '/' . $id;
+        mkdir($moduleDir . '/lib/Module/ZtestPolicyMissing', 0777, true);
+        $this->cleanup[] = $id;
+
+        file_put_contents(
+            $moduleDir . '/lib/Module/ZtestPolicyMissing/ZtestPolicyMissingContainerRegistrar.php',
+            <<<'PHP'
+            <?php
+            namespace MintyPHP\Module\ZtestPolicyMissing;
+            use MintyPHP\App\AppContainer;
+            use MintyPHP\App\Container\ContainerRegistrar;
+            final class ZtestPolicyMissingContainerRegistrar implements ContainerRegistrar {
+                public function register(AppContainer $container): void {}
+            }
+            PHP
+        );
+
+        file_put_contents(
+            $moduleDir . '/lib/Module/ZtestPolicyMissing/ZtestPolicyMissingAuthorizationPolicy.php',
+            <<<'PHP'
+            <?php
+            namespace MintyPHP\Module\ZtestPolicyMissing;
+            use MintyPHP\Service\Access\AuthorizationDecision;
+            use MintyPHP\Service\Access\AuthorizationPolicyInterface;
+            final class ZtestPolicyMissingAuthorizationPolicy implements AuthorizationPolicyInterface {
+                public function supports(string $ability): bool { return false; }
+                public function authorize(string $ability, array $context = []): AuthorizationDecision {
+                    return AuthorizationDecision::deny(403, 'forbidden');
+                }
+            }
+            PHP
+        );
+
+        file_put_contents($moduleDir . '/module.php', <<<'PHP'
+        <?php
+        return [
+            'id' => 'ztest-policy-missing',
+            'version' => '0.1.0',
+            'container_registrars' => [\MintyPHP\Module\ZtestPolicyMissing\ZtestPolicyMissingContainerRegistrar::class],
+            'authorization_policies' => [\MintyPHP\Module\ZtestPolicyMissing\ZtestPolicyMissingAuthorizationPolicy::class],
+        ];
+        PHP);
+
+        [$errors, $warnings] = $this->validateModule->invoke($this->command, $this->modulesDir, $id);
+
+        $warningText = implode("\n", $warnings);
+        self::assertStringContainsString('ZtestPolicyMissingAuthorizationPolicy', $warningText);
+        self::assertStringContainsString('not referenced in any ContainerRegistrar', $warningText);
+    }
+
+    public function testValidateNoWarningWhenPolicyReferencedInRegistrar(): void
+    {
+        $id = 'ztest-policy-ok';
+        $moduleDir = $this->modulesDir . '/' . $id;
+        mkdir($moduleDir . '/lib/Module/ZtestPolicyOk', 0777, true);
+        $this->cleanup[] = $id;
+
+        file_put_contents(
+            $moduleDir . '/lib/Module/ZtestPolicyOk/ZtestPolicyOkContainerRegistrar.php',
+            <<<'PHP'
+            <?php
+            namespace MintyPHP\Module\ZtestPolicyOk;
+            use MintyPHP\App\AppContainer;
+            use MintyPHP\App\Container\ContainerRegistrar;
+            final class ZtestPolicyOkContainerRegistrar implements ContainerRegistrar {
+                public function register(AppContainer $container): void {
+                    $container->set(ZtestPolicyOkAuthorizationPolicy::class, static fn () => new ZtestPolicyOkAuthorizationPolicy());
+                }
+            }
+            PHP
+        );
+
+        file_put_contents(
+            $moduleDir . '/lib/Module/ZtestPolicyOk/ZtestPolicyOkAuthorizationPolicy.php',
+            <<<'PHP'
+            <?php
+            namespace MintyPHP\Module\ZtestPolicyOk;
+            use MintyPHP\Service\Access\AuthorizationDecision;
+            use MintyPHP\Service\Access\AuthorizationPolicyInterface;
+            final class ZtestPolicyOkAuthorizationPolicy implements AuthorizationPolicyInterface {
+                public function supports(string $ability): bool { return false; }
+                public function authorize(string $ability, array $context = []): AuthorizationDecision {
+                    return AuthorizationDecision::deny(403, 'forbidden');
+                }
+            }
+            PHP
+        );
+
+        file_put_contents($moduleDir . '/module.php', <<<'PHP'
+        <?php
+        return [
+            'id' => 'ztest-policy-ok',
+            'version' => '0.1.0',
+            'container_registrars' => [\MintyPHP\Module\ZtestPolicyOk\ZtestPolicyOkContainerRegistrar::class],
+            'authorization_policies' => [\MintyPHP\Module\ZtestPolicyOk\ZtestPolicyOkAuthorizationPolicy::class],
+        ];
+        PHP);
+
+        [$errors, $warnings] = $this->validateModule->invoke($this->command, $this->modulesDir, $id);
+
+        self::assertSame([], $errors);
+        $warningText = implode("\n", $warnings);
+        self::assertStringNotContainsString('not referenced', $warningText);
+    }
+
+    private function scaffoldModule(string $id, string $manifestContent): void
+    {
+        $moduleDir = $this->modulesDir . '/' . $id;
+        mkdir($moduleDir . '/lib', 0777, true);
+        file_put_contents($moduleDir . '/module.php', $manifestContent);
+        $this->cleanup[] = $id;
+    }
+
+    private function removeDir(string $dir): void
+    {
+        if (!is_dir($dir)) {
+            return;
+        }
+        $items = new \RecursiveIteratorIterator(
+            new \RecursiveDirectoryIterator($dir, \FilesystemIterator::SKIP_DOTS),
+            \RecursiveIteratorIterator::CHILD_FIRST
+        );
+        foreach ($items as $item) {
+            if ($item->isDir()) {
+                rmdir($item->getPathname());
+            } else {
+                unlink($item->getPathname());
+            }
+        }
+        rmdir($dir);
+    }
+}