feat: implement exception handling system with error context and policies

AGENTS.md

@@ -0,0 +1,33 @@
+# Repository Guidelines
+
+## Project Structure & Module Organization
+- `src/` layers PHP code (`Application`, `Domain`, `Framework`, `Infrastructure`); create new classes under the matching namespace and keep adapters in Infrastructure.
+- `resources/` stores Vite-managed frontend code (`resources/js`, `resources/css`), while build artifacts belong in `public/assets` under the `public/` web root.
+- `tests/` mirrors the PHP namespaces and houses Playwright suites in `tests/e2e`; share fixtures and stubs through `tests/Support`.
+- Operational docs and tooling sit in `docs/`, `docker/`, and `deployment/`; update those paths whenever runtime behaviour changes.
+
+## Build, Test & Development Commands
+- `make up` / `make down` manage the Docker stack; add `make logs` when you need container output.
+- `npm run dev` starts Vite locally, and `npm run build` produces optimized bundles into `public/assets`.
+- `make test` drives the full Pest suite; use `make test-unit`, `make test-domain`, or `make test-coverage` for focused runs.
+- JavaScript and browser checks run via `npm run test`, `npm run test:e2e`, and `npm run test:coverage`.
+- Quality gates: `make phpstan`, `make cs` (dry run), `make cs-fix` (auto-fix), plus `npm run lint:js` and `npm run format`.
+
+## Coding Style & Naming Conventions
+- Follow PSR-12 with strict types; prefer constructor injection and suffix integrations with their role (`MailerAdapter`, `RedisCache`).
+- Keep PHP objects immutable unless Domain logic requires mutation; colocate interfaces with their consuming layer.
+- Use 4-space indents in PHP and Prettier defaults for TypeScript; name frontend components in PascalCase and utilities in camelCase.
+
+## Testing Guidelines
+- Add Pest specs beside the feature namespace with expressive names (`it_handles_invalid_tokens`); keep builders in `tests/Support`.
+- Mock external services through `tests/__mocks__`; rely on Pest datasets for edge cases.
+- Sync Playwright specs with UX changes, reuse `tests/e2e/fixtures`, and review reports via `playwright show-report`.
+
+## Commit & Pull Request Guidelines
+- Use Conventional Commits (`fix:`, `feat:`, optional scope) to match history.
+- PRs must outline the change, list executed checks, and link issues; attach screenshots for UI work or config diffs for ops updates.
+- Confirm CI covers Pest, Jest, Playwright, PHPStan, and php-cs-fixer before requesting review.
+
+## Security & Configuration Tips
+- Never commit `.env` or secrets; follow `ENV_SETUP.md` and store deployment credentials in Vault.
+- Run `make security-check` ahead of releases and reflect infrastructure changes in `docs/deployment/`.

src/Framework/Core/AppBootstrapper.php

@@ -20,6 +20,8 @@ use App\Framework\DI\DefaultContainer;
 use App\Framework\Encryption\EncryptionFactory;
 use App\Framework\ErrorHandling\CliErrorHandler;
 use App\Framework\ErrorHandling\ErrorHandler;
+use App\Framework\ErrorHandling\ErrorHandlerManager;
+use App\Framework\ExceptionHandling\ExceptionHandlerManager;
 use App\Framework\Http\MiddlewareManager;
 use App\Framework\Http\MiddlewareManagerInterface;
 use App\Framework\Http\ResponseEmitter;
@@ -71,7 +73,7 @@ final readonly class AppBootstrapper
 
         //if ($envType->isDevelopment()) {
 
-        if($typedConfig->app->type->isDevelopment()) {
+        /*if($typedConfig->app->type->isDevelopment()) {
             // Fehleranzeige für die Entwicklung aktivieren
             ini_set('display_errors', 1);
             ini_set('display_startup_errors', 1);
@@ -87,7 +89,7 @@ final readonly class AppBootstrapper
 
                 return false;
             }, true, true);
-        }
+        }*/
     }
 
     public function bootstrapWeb(): ApplicationInterface
@@ -157,7 +159,11 @@ final readonly class AppBootstrapper
 
     private function registerWebErrorHandler(): void
     {
-        $this->container->get(ErrorHandler::class)->register();
+        new ExceptionHandlerManager();
+        #var_dump('registerWebErrorHandler');
+        #$eh = $this->container->get(ErrorHandlerManager::class);
+        #$eh->register();
+        //$this->container->get(ErrorHandler::class)->register();
     }
 
     private function registerCliErrorHandler(): void

src/Framework/DI/Container.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace App\Framework\DI;
 
 use App\Framework\Core\ValueObjects\ClassName;
+use Stringable;
 
 interface Container
 {
@@ -17,17 +18,26 @@ interface Container
      * @param class-string<T>|ClassName $class
      * @return T
      */
-    public function get(string|ClassName $class): object;
+    public function get(ClassName|Stringable|string $class): object;
 
     /** @param class-string $class */
-    public function has(string $class): bool;
+    public function has(ClassName|Stringable|string $class): bool;
 
-    public function bind(string $abstract, callable|string|object $concrete): void;
+    public function bind(
+        ClassName|Stringable|string $abstract,
+        callable|string|object $concrete
+    ): void;
 
-    public function singleton(string $abstract, callable|string|object $concrete): void;
+    public function singleton(
+        ClassName|Stringable|string $abstract,
+        callable|string|object $concrete
+    ): void;
 
-    public function instance(string $abstract, object $instance): void;
+    public function instance(
+        ClassName|Stringable|string $abstract,
+        object $instance
+    ): void;
 
     /** @param class-string $class */
-    public function forget(string $class): void;
+    public function forget(ClassName|Stringable|string $class): void;
 }

src/Framework/DI/DefaultContainer.php

@@ -5,11 +5,17 @@ declare(strict_types=1);
 namespace App\Framework\DI;
 
 use App\Framework\Core\ValueObjects\ClassName;
+use App\Framework\DI\Exceptions\ClassNotInstantiable;
+use App\Framework\DI\Exceptions\ClassNotResolvableException;
+use App\Framework\DI\Exceptions\ClassResolutionException;
+use App\Framework\DI\Exceptions\ContainerException;
 use App\Framework\DI\Exceptions\CyclicDependencyException;
 use App\Framework\DI\Exceptions\LazyLoadingException;
+use App\Framework\Discovery\Results\DiscoveryRegistry;
 use App\Framework\Metrics\FrameworkMetricsCollector;
 use App\Framework\Reflection\CachedReflectionProvider;
 use App\Framework\Reflection\ReflectionProvider;
+use Stringable;
 use Throwable;
 
 final class DefaultContainer implements Container
@@ -54,8 +60,9 @@ final class DefaultContainer implements Container
         $this->instance(ReflectionProvider::class, $this->reflectionProvider);
     }
 
-    public function bind(string $abstract, callable|string|object $concrete): void
+    public function bind(ClassName|Stringable|string $abstract, callable|string|object $concrete): void
     {
+        $abstract = (string) $abstract;
         $this->bindings->bind($abstract, $concrete);
 
         // Only clear caches for valid class names, skip string keys like 'filesystem.storage.local'
@@ -64,23 +71,26 @@ final class DefaultContainer implements Container
         }
     }
 
-    public function singleton(string $abstract, callable|string|object $concrete): void
+    public function singleton(ClassName|Stringable|string $abstract, callable|string|object $concrete): void
     {
+        $abstract = (string) $abstract;
         $this->bind($abstract, $concrete);
         $this->instances->markAsSingleton($abstract);
     }
 
-    public function instance(string $abstract, object $instance): void
+    public function instance(ClassName|Stringable|string $abstract, object $instance): void
     {
         $this->instances->setInstance($abstract, $instance);
     }
 
     /**
-     * @inheritDoc
+     * @template T of object
+     * @param class-string<T>|ClassName|Stringable $class
+     * @return T
      */
-    public function get(string|ClassName $class): object
+    public function get(ClassName|Stringable|string $class): object
     {
-        $className = $class instanceof ClassName ? $class->toString() : $class;
+        $className = (string) $class;
 
         // Bereits instanziierte Objekte zurückgeben
         if ($this->instances->hasSingleton($className)) {
@@ -154,9 +164,9 @@ final class DefaultContainer implements Container
 
         // For string keys without bindings, throw immediately
         if (!class_exists($class) && !interface_exists($class)) {
-            throw new \RuntimeException(
+            throw new ClassNotResolvableException(
-                "Cannot resolve '{$class}': not a valid class and no binding exists. " .
+                class: $class,
-                "Available bindings: " . implode(', ', array_keys($this->bindings->getAllBindings()))
+                availableBindings: array_keys($this->bindings->getAllBindings())
             );
         }
 
@@ -174,27 +184,16 @@ final class DefaultContainer implements Container
             $dependencies = $this->dependencyResolver->resolveDependencies($className);
 
             return $reflection->newInstance(...$dependencies->toArray());
-        } catch (\RuntimeException $e) {
+        } catch (ContainerException $e) {
-            // If it's already our detailed exception, just re-throw
+            // If it's already a ContainerException, just re-throw
-            if (str_contains($e->getMessage(), 'Dependency resolution chain:')) {
             throw $e;
-            }
+        } catch (\RuntimeException|\ReflectionException $e) {
-
+            // Wrap with binding information
-            // Otherwise, wrap with binding information
+            throw ClassResolutionException::fromRuntimeException(
-            throw new \RuntimeException(
+                class: $class,
-                "Cannot resolve class '{$class}': {$e->getMessage()}. " .
+                exception: $e,
-                "Available bindings: " . implode(', ', array_keys($this->bindings->getAllBindings())) .
+                availableBindings: array_keys($this->bindings->getAllBindings()),
-                ". Dependency chain: " . implode(' -> ', $this->resolving),
+                dependencyChain: $this->resolving
-                0,
-                $e
-            );
-        } catch (\ReflectionException $e) {
-            throw new \RuntimeException(
-                "Cannot resolve class '{$class}': {$e->getMessage()}. " .
-                "Available bindings: " . implode(', ', array_keys($this->bindings->getAllBindings())) .
-                ". Dependency chain: " . implode(' -> ', $this->resolving),
-                0,
-                $e
             );
         }
     }
@@ -202,38 +201,67 @@ final class DefaultContainer implements Container
     private function throwDetailedBindingException(string $class/*, $reflection*/): never
     {
         $availableBindings = array_keys($this->bindings->getAllBindings());
-        $dependencyChain = implode(' -> ', $this->resolving);
 
-        // Look for similar interface bindings
+        // Try to get DiscoveryRegistry from container and include discovered initializers
-        $similarBindings = array_filter($availableBindings, function ($binding) use ($class) {
+        $discoveredInitializers = [];
-            return str_contains($binding, basename(str_replace('\\', '/', $class)));
+        if ($this->has(DiscoveryRegistry::class)) {
-        });
+            try {
+                $discoveryRegistry = $this->get(DiscoveryRegistry::class);
+                $initializerResults = $discoveryRegistry->attributes->get(Initializer::class);
 
-        $message = "Cannot instantiate class '{$class}': class is not instantiable (interface, abstract class, or trait).\n" .
+                if (! empty($initializerResults)) {
-                   "Dependency resolution chain: {$dependencyChain}\n" .
+                    $discoveredInitializers = array_map(
-                   "Total available bindings: " . count($availableBindings) . "\n";
+                        fn($attr) => $attr->className->getFullyQualified(),
-
+                        $initializerResults
-        if (! empty($similarBindings)) {
+                    );
-            $message .= "Similar bindings found: " . implode(', ', $similarBindings) . "\n";
+                }
+            } catch (\Throwable $e) {
+                // Silently ignore errors when trying to access DiscoveryRegistry to avoid masking the original error
+            }
         }
 
-        $message .= "All bindings: " . implode(', ', $availableBindings);
+        throw ClassNotInstantiable::fromContainerContext(
-
+            class: $class,
-        throw new \RuntimeException($message);
+            dependencyChain: $this->resolving,
+            availableBindings: $availableBindings,
+            discoveredInitializers: $discoveredInitializers
+        );
     }
 
     private function resolveBinding(string $class, callable|string|object $concrete): object
     {
+        try {
             return match (true) {
                 is_callable($concrete) => $concrete($this),
                 is_string($concrete) => $this->get($concrete),
+                /* @var object $concrete */
                 default => $concrete
             };
+        } catch (ContainerException $e) {
+            // Re-throw ContainerExceptions as-is (they already have proper context)
+            throw $e;
+        } catch (\Throwable $e) {
+            // Determine binding type for better error messages
+            $bindingType = match (true) {
+                is_callable($concrete) => 'callable',
+                is_string($concrete) => 'string',
+                default => 'object'
+            };
+
+            throw ClassResolutionException::fromBindingResolution(
+                class: $class,
+                previous: $e,
+                availableBindings: array_keys($this->bindings->getAllBindings()),
+                dependencyChain: $this->resolving,
+                bindingType: $bindingType
+            );
+        }
     }
 
     /** @param class-string $class */
-    public function has(string $class): bool
+    public function has(ClassName|Stringable|string $class): bool
     {
+        $class = (string) $class;
         return $this->instances->hasSingleton($class)
             || $this->instances->hasInstance($class)
             || $this->bindings->hasBinding($class)
@@ -241,8 +269,9 @@ final class DefaultContainer implements Container
     }
 
     /** @param class-string $class */
-    public function forget(string $class): void
+    public function forget(ClassName|Stringable|string $class): void
     {
+        $class = (string) $class;
         $this->instances->forget($class);
         $this->bindings->forget($class);
         $this->clearCaches(ClassName::create($class));

src/Framework/DI/Exceptions/ClassNotInstantiable.php

@@ -0,0 +1,90 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\DI\Exceptions;
+
+use App\Framework\Exception\ExceptionContext;
+
+/**
+ * Thrown when a class cannot be instantiated because it's an interface, abstract class, or trait
+ */
+final class ClassNotInstantiable extends ContainerException
+{
+    /**
+     * Factory method to create exception from container context
+     * Automatically calculates similar bindings from available bindings
+     *
+     * @param class-string $class
+     * @param string[] $dependencyChain
+     * @param string[] $availableBindings
+     * @param string[] $discoveredInitializers
+     */
+    public static function fromContainerContext(
+        string $class,
+        array $dependencyChain,
+        array $availableBindings,
+        array $discoveredInitializers = []
+    ): self {
+        // Calculate similar bindings based on class name
+        $similarBindings = array_filter($availableBindings, function ($binding) use ($class) {
+            return str_contains($binding, basename(str_replace('\\', '/', $class)));
+        });
+
+        return new self(
+            class: $class,
+            dependencyChain: $dependencyChain,
+            availableBindings: $availableBindings,
+            similarBindings: $similarBindings,
+            discoveredInitializers: $discoveredInitializers
+        );
+    }
+
+    /**
+     * @param class-string $class
+     * @param string[] $dependencyChain
+     * @param string[] $availableBindings
+     * @param string[] $similarBindings
+     * @param string[] $discoveredInitializers
+     */
+    public function __construct(
+        public readonly string $class,
+        public readonly array  $dependencyChain,
+        public readonly array  $availableBindings,
+        public readonly array  $similarBindings = [],
+        public readonly array  $discoveredInitializers = [],
+    )
+    {
+        $dependencyChainStr = implode(' -> ', $this->dependencyChain);
+
+        $message = "Cannot instantiate class '{$this->class}': class is not instantiable (interface, abstract class, or trait).\n" .
+            "Dependency resolution chain: {$dependencyChainStr}\n" .
+            'Total available bindings: ' . count($this->availableBindings) . "\n";
+
+        if (!empty($this->similarBindings)) {
+            $message .= 'Similar bindings found: ' . implode(', ', $this->similarBindings) . "\n";
+        }
+
+        if (!empty($this->discoveredInitializers)) {
+            $message .= "Discovered initializers (" . count($this->discoveredInitializers) . "): " .
+                implode(', ', $this->discoveredInitializers) . "\n";
+        } else {
+            $message .= "No initializers discovered in DiscoveryRegistry.\n";
+        }
+
+        $context = ExceptionContext::forOperation('class_instantiation', 'DI Container')
+            ->withData([
+                'class' => $this->class,
+                'dependencyChain' => $this->dependencyChain,
+                'availableBindings' => $this->availableBindings,
+                'similarBindings' => $this->similarBindings,
+                'discoveredInitializers' => $this->discoveredInitializers,
+                'bindingCount' => count($this->availableBindings),
+                'initializerCount' => count($this->discoveredInitializers),
+            ]);
+
+        parent::__construct(
+            message: $message,
+            context: $context
+        );
+    }
+}

src/Framework/DI/Exceptions/ClassNotResolvableException.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\DI\Exceptions;
+
+use App\Framework\Exception\ExceptionContext;
+
+/**
+ * Thrown when a class cannot be resolved because it's not a valid class/interface and no binding exists
+ */
+final class ClassNotResolvableException extends ContainerException
+{
+    /**
+     * @param string[] $availableBindings
+     */
+    public function __construct(
+        string $class,
+        array $availableBindings,
+        int $code = 0,
+        ?\Throwable $previous = null
+    ) {
+        $message = "Cannot resolve '{$class}': not a valid class and no binding exists. " .
+            "Available bindings: " . implode(', ', $availableBindings);
+
+        $context = ExceptionContext::forOperation('class_resolution', 'DI Container')
+            ->withData([
+                'class' => $class,
+                'availableBindings' => $availableBindings,
+                'bindingCount' => count($availableBindings),
+            ]);
+
+        parent::__construct(
+            message: $message,
+            context: $context,
+            code: $code,
+            previous: $previous
+        );
+    }
+}
+

src/Framework/DI/Exceptions/ClassResolutionException.php

@@ -0,0 +1,105 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\DI\Exceptions;
+
+use App\Framework\Exception\ExceptionContext;
+
+/**
+ * Thrown when a class cannot be resolved due to reflection or other errors
+ */
+final class ClassResolutionException extends ContainerException
+{
+    /**
+     * Factory method to create exception from binding resolution failure
+     *
+     * @param class-string $class
+     * @param \Throwable $previous
+     * @param string[] $availableBindings
+     * @param string[] $dependencyChain
+     * @param string $bindingType One of 'callable', 'string', or 'object'
+     */
+    public static function fromBindingResolution(
+        string $class,
+        \Throwable $previous,
+        array $availableBindings,
+        array $dependencyChain,
+        string $bindingType
+    ): self {
+        $reason = "Binding resolution failed (binding type: {$bindingType}): " . $previous->getMessage();
+
+        return new self(
+            class: $class,
+            reason: $reason,
+            availableBindings: $availableBindings,
+            dependencyChain: $dependencyChain,
+            previous: $previous,
+            bindingType: $bindingType
+        );
+    }
+
+    /**
+     * Factory method to create exception from RuntimeException or ReflectionException
+     *
+     * @param class-string $class
+     * @param \RuntimeException|\ReflectionException $exception
+     * @param string[] $availableBindings
+     * @param string[] $dependencyChain
+     */
+    public static function fromRuntimeException(
+        string $class,
+        \RuntimeException|\ReflectionException $exception,
+        array $availableBindings,
+        array $dependencyChain
+    ): self {
+        return new self(
+            class: $class,
+            reason: $exception->getMessage(),
+            availableBindings: $availableBindings,
+            dependencyChain: $dependencyChain,
+            previous: $exception
+        );
+    }
+
+    /**
+     * @param string[] $dependencyChain
+     * @param string[] $availableBindings
+     */
+    public function __construct(
+        string $class,
+        string $reason,
+        array $availableBindings,
+        array $dependencyChain,
+        int $code = 0,
+        ?\Throwable $previous = null,
+        ?string $bindingType = null
+    ) {
+        $message = "Cannot resolve class '{$class}': {$reason}. " .
+            "Available bindings: " . implode(', ', $availableBindings) .
+            ". Dependency chain: " . implode(' -> ', $dependencyChain);
+
+        $contextData = [
+            'class' => $class,
+            'reason' => $reason,
+            'availableBindings' => $availableBindings,
+            'dependencyChain' => $dependencyChain,
+            'bindingCount' => count($availableBindings),
+        ];
+
+        if ($bindingType !== null) {
+            $contextData['bindingType'] = $bindingType;
+        }
+
+        $context = ExceptionContext::forOperation('class_resolution', 'DI Container')
+            ->withData($contextData);
+
+        parent::__construct(
+            message: $message,
+            context: $context,
+            code: $code,
+            previous: $previous
+        );
+    }
+}
+

src/Framework/DI/Exceptions/ContainerException.php

@@ -0,0 +1,28 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\DI\Exceptions;
+
+use App\Framework\Exception\ExceptionContext;
+use App\Framework\Exception\FrameworkException;
+
+class ContainerException extends FrameworkException
+{
+    /**
+     * Simplified constructor for simple error messages
+     * Automatically creates an ExceptionContext for DI operations
+     */
+    public function __construct(
+        string $message = '',
+        ?ExceptionContext $context = null,
+        int $code = 0,
+        ?\Throwable $previous = null
+    ) {
+        parent::__construct(
+            message: $message,
+            context: $context ?? ExceptionContext::forOperation('dependency_injection', 'DI Container'),
+            code: $code,
+            previous: $previous
+        );
+    }
+}

src/Framework/DI/Exceptions/DefaultImplementationException.php

@@ -5,13 +5,11 @@ declare(strict_types=1);
 namespace App\Framework\DI\Exceptions;
 
 use App\Framework\Exception\ExceptionContext;
-use App\Framework\Exception\FrameworkException;
-use RuntimeException;
 
 /**
  * Exception thrown when DefaultImplementation attribute validation fails
  */
-final class DefaultImplementationException extends RuntimeException
+final class DefaultImplementationException extends ContainerException
 {
     /**
      * Thrown when a class with DefaultImplementation attribute does not implement the specified interface
@@ -21,13 +19,20 @@ final class DefaultImplementationException extends RuntimeException
      */
     public static function doesNotImplementInterface(string $className, string $interface): self
     {
-        return new self(
+        $message = sprintf(
-            sprintf(
             'Class "%s" has #[DefaultImplementation] for interface "%s" but does not implement that interface',
             $className,
             $interface
-            )
         );
+
+        $context = ExceptionContext::forOperation('default_implementation_validation', 'DI Container')
+            ->withData([
+                'className' => $className,
+                'interface' => $interface,
+                'errorType' => 'does_not_implement_interface',
+            ]);
+
+        return new self($message, $context);
     }
 
     /**
@@ -37,13 +42,19 @@ final class DefaultImplementationException extends RuntimeException
      */
     public static function noInterfacesImplemented(string $className): self
     {
-        return new self(
+        $message = sprintf(
-            sprintf(
             'Class "%s" has #[DefaultImplementation] without explicit interface but implements no interfaces. ' .
             'Either specify an interface explicitly or ensure the class implements at least one interface.',
             $className
-            )
         );
+
+        $context = ExceptionContext::forOperation('default_implementation_validation', 'DI Container')
+            ->withData([
+                'className' => $className,
+                'errorType' => 'no_interfaces_implemented',
+            ]);
+
+        return new self($message, $context);
     }
 
     /**
@@ -54,12 +65,19 @@ final class DefaultImplementationException extends RuntimeException
      */
     public static function interfaceDoesNotExist(string $className, string $interface): self
     {
-        return new self(
+        $message = sprintf(
-            sprintf(
             'Class "%s" has #[DefaultImplementation] for interface "%s" which does not exist',
             $className,
             $interface
-            )
         );
+
+        $context = ExceptionContext::forOperation('default_implementation_validation', 'DI Container')
+            ->withData([
+                'className' => $className,
+                'interface' => $interface,
+                'errorType' => 'interface_does_not_exist',
+            ]);
+
+        return new self($message, $context);
     }
 }

src/Framework/DI/Initializer.php

@@ -6,7 +6,7 @@ namespace App\Framework\DI;
 
 use App\Framework\Context\ContextType;
 
-#[\Attribute(\Attribute::TARGET_METHOD)]
+#[\Attribute(\Attribute::TARGET_METHOD|\Attribute::IS_REPEATABLE)]
 final readonly class Initializer
 {
     /** @var ContextType[]|null */

src/Framework/Discovery/InitializerProcessor.php

@@ -29,8 +29,7 @@ final readonly class InitializerProcessor
         private Container $container,
         private ReflectionProvider $reflectionProvider,
         private ExecutionContext $executionContext,
-    ) {
+    ) {}
-    }
 
     /**
      * Intelligente Initializer-Verarbeitung mit Dependency-Graph:
@@ -41,7 +40,7 @@ final readonly class InitializerProcessor
     public function processInitializers(DiscoveryRegistry $results): void
     {
         // Safe Logger resolution - use if available, otherwise rely on error_log
-        $logger = $this->container->has(Logger::class) ? $this->container->get(Logger::class) : null;
+        $logger = $this->container->get(Logger::class);
         $initializerResults = $results->attributes->get(Initializer::class);
 
         $logger?->debug("InitializerProcessor: Processing " . count($initializerResults) . " initializers");

src/Framework/ErrorHandling/ErrorHandlerInitializer.php

@@ -4,8 +4,8 @@ declare(strict_types=1);
 
 namespace App\Framework\ErrorHandling;
 
-use App\Framework\Attributes\Initializer;
 use App\Framework\DI\Container;
+use App\Framework\DI\Initializer;
 use App\Framework\ErrorHandling\Handlers\DatabaseErrorHandler;
 use App\Framework\ErrorHandling\Handlers\FallbackErrorHandler;
 use App\Framework\ErrorHandling\Handlers\HttpErrorHandler;

src/Framework/ErrorHandling/ValueObjects/ErrorMetadata.php

@@ -4,7 +4,7 @@ declare(strict_types=1);
 
 namespace App\Framework\ErrorHandling\ValueObjects;
 
-use App\Framework\ErrorHandling\ErrorSeverity;
+use App\Framework\Exception\Core\ErrorSeverity;
 
 /**
  * Value Object representing error classification metadata.

src/Framework/ExceptionHandling/ErrorContext.php

@@ -0,0 +1,37 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling;
+
+use ErrorException;
+
+final readonly class ErrorContext
+{
+    public function __construct(
+        public int $severity,
+        public string $message,
+        public ?string $file = null,
+        public ?int $line = null,
+        public bool $isSuppressed = false,
+    ) {}
+
+    public static function create(
+        int $severity,
+        string $message,
+        ?string $file = null,
+        ?int $line = null,
+        bool $isSuppressed = false,
+    ): self {
+        return new self($severity, $message, $file, $line, $isSuppressed);
+    }
+
+    public function isDeprecation(): bool
+    {
+        return $this->severity === E_DEPRECATED || $this->severity === E_USER_DEPRECATED;
+    }
+
+    public function isFatal(): bool
+    {
+        return in_array($this->severity, [E_ERROR, E_RECOVERABLE_ERROR, E_USER_ERROR], true);
+    }
+}

src/Framework/ExceptionHandling/ErrorDecision.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Framework\ExceptionHandling;
+
+enum ErrorDecision
+{
+    /** Fehler selbst behandelt (kein PHP-Standard mehr) */
+    case HANDLED;
+
+    /** An PHP-Standard weitergeben */
+    case DEFER;
+
+    /** Eskalieren als Exception */
+    case THROW;
+}

src/Framework/ExceptionHandling/ErrorHandler.php

@@ -0,0 +1,48 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling;
+
+use App\Framework\ExceptionHandling\Strategy\StrictErrorPolicy;
+use ErrorException;
+
+final readonly class ErrorHandler
+{
+    public function __construct(
+        private ErrorHandlerStrategy $strategy = new StrictErrorPolicy,
+    )
+    {}
+
+
+    /**
+     * @throws ErrorException
+     */
+    public function handle(
+        int $severity,
+        string $message,
+        ?string $file = null,
+        ?int $line = null,
+    ): bool {
+
+        $context = ErrorContext::create(
+            severity    : $severity,
+            message     : $message,
+            file        : $file,
+            line        : $line,
+            isSuppressed: $this->isSuppressed($severity)
+        );
+
+        $decision = $this->strategy->handle($context);
+
+        return match($decision) {
+            ErrorDecision::HANDLED => true,
+            ErrorDecision::DEFER => false,
+            ErrorDecision::THROW => throw new ErrorException($message, 0, $severity, $file, $line),
+        };
+    }
+
+    private function isSuppressed($severity): bool
+    {
+        return !(error_reporting() & $severity);
+    }
+}

src/Framework/ExceptionHandling/ErrorHandlerStrategy.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Framework\ExceptionHandling;
+
+use ErrorException;
+
+interface ErrorHandlerStrategy
+{
+    public function handle(ErrorContext $context): ErrorDecision;
+}

src/Framework/ExceptionHandling/ErrorKernel.php

@@ -0,0 +1,25 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling;
+
+use App\Framework\ExceptionHandling\Reporter\LogReporter;
+use Throwable;
+
+final readonly class ErrorKernel
+{
+    public function __construct(
+        private ErrorRendererFactory $rendererFactory = new ErrorRendererFactory,
+    ) {}
+    public function handle(Throwable $e, array $context = []): mixed
+    {
+
+        $log = new LogReporter();
+        $log->report($e->getMessage());
+
+        $this->rendererFactory->getRenderer()->render();
+
+        return null;
+    }
+}
+

src/Framework/ExceptionHandling/ErrorRenderer.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace App\Framework\ExceptionHandling;
+
+interface ErrorRenderer
+{
+    public function render(): void;
+}

src/Framework/ExceptionHandling/ErrorRendererFactory.php

@@ -0,0 +1,13 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling;
+
+use App\Framework\ExceptionHandling\Renderer\HtmlErrorRenderer;
+final class ErrorRendererFactory
+{
+    public function getRenderer():ErrorRenderer
+    {
+        return new HtmlErrorRenderer();
+    }
+}

src/Framework/ExceptionHandling/ErrorScope.php

@@ -0,0 +1,53 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling;
+
+use App\Framework\DI\Initializer;
+use Fiber;
+
+final class ErrorScope
+{
+    private array $stack = [];
+
+    #[Initializer]
+    public static function initialize(): ErrorScope
+    {
+        return new self;
+    }
+
+    public function enter(ErrorScopeContext $context): int
+    {
+        $id = $this->fiberId();
+        $this->stack[$id] ??= [];
+        $this->stack[$id][] = $context;
+        return count($this->stack[$id]);
+    }
+
+    public function current(): ?ErrorScopeContext
+    {
+        $id = $this->fiberId();
+        $stack = $this->stack[$id] ?? [];
+        return end($stack) ?? null;
+    }
+
+    public function leave(int $token): void
+    {
+        $id = $this->fiberId();
+        if(!isset($this->stack[$id])) {
+            return;
+        }
+        while(!empty($this->stack[$id]) && count($this->stack[$id]) >= $token) {
+            array_pop($this->stack[$id]);
+        }
+        if(empty($this->stack[$id])) {
+            unset($this->stack[$id]);
+        }
+    }
+
+    private function fiberId(): int
+    {
+        $fiber = Fiber::getCurrent();
+        return $fiber ? spl_object_id($fiber) : 0;
+    }
+}

src/Framework/ExceptionHandling/ErrorScopeContext.php

@@ -0,0 +1,9 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling;
+
+final class ErrorScopeContext
+{
+
+}

src/Framework/ExceptionHandling/ExceptionHandler.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Framework\ExceptionHandling;
+
+use Throwable;
+
+interface ExceptionHandler
+{
+    public function handle(Throwable $throwable): void;
+}

src/Framework/ExceptionHandling/ExceptionHandlerManager.php

@@ -0,0 +1,35 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling;
+
+use App\Framework\Config\EnvironmentType;
+use App\Framework\ExceptionHandling\Strategy\ErrorPolicyResolver;
+
+final readonly class ExceptionHandlerManager
+{
+    public function __construct()
+    {
+        $resolver = new ErrorPolicyResolver();
+        $this->registerErrorHandler(new ErrorHandler($resolver->resolve(EnvironmentType::DEV)));
+
+        $this->registerExceptionHandler(new GlobalExceptionHandler());
+
+        $this->registerShutdownHandler(new ShutdownHandler());
+    }
+
+    public function registerExceptionHandler(ExceptionHandler $handler): void
+    {
+        set_exception_handler($handler->handle(...));
+    }
+
+    private function registerErrorHandler(ErrorHandler $handler):void
+    {
+        set_error_handler($handler->handle(...), E_ALL);
+    }
+
+    public function registerShutdownHandler(ShutdownHandler $handler): void
+    {
+        register_shutdown_function($handler->handle(...));
+    }
+}

src/Framework/ExceptionHandling/GlobalExceptionHandler.php

@@ -0,0 +1,14 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling;
+
+final readonly class GlobalExceptionHandler implements ExceptionHandler
+{
+    public function handle(\Throwable $throwable): void
+    {
+        $kernel = new ErrorKernel();
+
+        $kernel->handle($throwable);
+    }
+}

src/Framework/ExceptionHandling/Renderer/HtmlErrorRenderer.php

@@ -0,0 +1,14 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling\Renderer;
+
+use App\Framework\ExceptionHandling\ErrorRenderer;
+
+final class HtmlErrorRenderer implements ErrorRenderer
+{
+    public function render(): void
+    {
+        echo '<html lang="en"><body><h1>500 Internal Server Error</h1></body></html>';
+    }
+}

src/Framework/ExceptionHandling/Reporter/LogReporter.php

@@ -0,0 +1,12 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling\Reporter;
+
+final class LogReporter implements Reporter
+{
+    public function report(string $message): void
+    {
+        echo ("[log] " . $message);
+    }
+}

src/Framework/ExceptionHandling/Reporter/Reporter.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace App\Framework\ExceptionHandling\Reporter;
+
+interface Reporter
+{
+    public function report(string $message): void;
+}

src/Framework/ExceptionHandling/ShutdownHandler.php

@@ -0,0 +1,56 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling;
+
+use App\Framework\ErrorHandling\ErrorHandlerManager;
+use App\Framework\ExceptionHandling\Strategy\StrictErrorPolicy;
+use Error;
+
+final readonly class ShutdownHandler
+{
+    private const array FATAL_TYPES = [E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR];
+
+    public function handle(): void
+    {
+        $last = error_get_last();
+
+        if (!$last || !$this->isFatalError($last['type'])) {
+            return;
+        }
+
+        $this->cleanOutputBuffer();
+
+        $file = (string)($last['file'] ?? 'unknown');
+        $line = (int)($last['line'] ?? 0);
+
+        $error = new Error($last['message'] ?? 'Fatal error',0);
+
+
+
+        try {
+            $ehm = new ErrorKernel();
+            $ehm->handle($error, ['file' => $file, 'line' => $line]);
+        } catch (\Throwable) {
+
+        }
+
+        exit(255);
+    }
+
+    private function cleanOutputBuffer(): void
+    {
+        try {
+            while (ob_get_level() > 0) {
+                @ob_end_clean();
+            }
+        } catch (\Throwable) {
+            // ignore
+        }
+    }
+
+    private function isFatalError(?int $type = null): bool
+    {
+        return in_array($type ?? 0, self::FATAL_TYPES, true);
+    }
+}

src/Framework/ExceptionHandling/Strategy/ErrorPolicyResolver.php

@@ -0,0 +1,19 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling\Strategy;
+
+use App\Framework\Config\EnvironmentType;
+use App\Framework\ExceptionHandling\ErrorHandlerStrategy;
+
+final readonly class ErrorPolicyResolver
+{
+    public function resolve(EnvironmentType $environmentType): ErrorHandlerStrategy
+    {
+        return match(true) {
+            $environmentType->isProduction() => new StrictErrorPolicy(),
+            $environmentType->isDevelopment() => new StrictErrorPolicy(),
+            default => new StrictErrorPolicy(),
+        };
+    }
+}

src/Framework/ExceptionHandling/Strategy/LenientPolicy.php

@@ -0,0 +1,45 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling\Strategy;
+
+use App\Framework\ExceptionHandling\ErrorContext;
+use App\Framework\ExceptionHandling\ErrorDecision;
+use App\Framework\ExceptionHandling\ErrorHandlerStrategy;
+use App\Framework\Logging\Logger;
+use App\Framework\Logging\ValueObjects\LogContext;
+use ErrorException;
+
+final readonly class LenientPolicy implements ErrorHandlerStrategy
+{
+    public function __construct(private Logger $logger)
+    {
+
+    }
+
+    public function handle(ErrorContext $context): ErrorDecision
+    {
+        if($context->isDeprecation()) {
+            $this->logger->notice("[Deprecation] {$context->message}",
+                LogContext::withData(
+                    [
+                        'file' => $context->file,
+                        'line' => $context->line]
+                ));
+
+            return ErrorDecision::HANDLED;
+        }
+
+        if($context->isFatal()) {
+            throw new ErrorException(
+                $context->message,
+                0,
+                $context->severity,
+                $context->file,
+                $context->line
+            );
+        }
+
+        return ErrorDecision::DEFER;
+    }
+}

src/Framework/ExceptionHandling/Strategy/SilentErrorPolicy.php

@@ -0,0 +1,16 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling\Strategy;
+
+use App\Framework\ExceptionHandling\ErrorContext;
+use App\Framework\ExceptionHandling\ErrorDecision;
+use App\Framework\ExceptionHandling\ErrorHandlerStrategy;
+
+final class SilentErrorPolicy implements ErrorHandlerStrategy
+{
+    public function handle(ErrorContext $context): ErrorDecision
+    {
+        return ErrorDecision::DEFER;
+    }
+}

src/Framework/ExceptionHandling/Strategy/StrictErrorPolicy.php

@@ -0,0 +1,20 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Framework\ExceptionHandling\Strategy;
+
+use App\Framework\ExceptionHandling\ErrorContext;
+use App\Framework\ExceptionHandling\ErrorDecision;
+use App\Framework\ExceptionHandling\ErrorHandlerStrategy;
+use ErrorException;
+
+final readonly class StrictErrorPolicy implements ErrorHandlerStrategy
+{
+    /**
+     * @throws ErrorException
+     */
+    public function handle(ErrorContext $context): ErrorDecision
+    {
+        throw new ErrorException($context->message, 0, $context->severity, $context->file, $context->line);
+    }
+}

src/Framework/Http/HttpMiddlewareChain.php

@@ -6,6 +6,7 @@ namespace App\Framework\Http;
 
 use App\Framework\DI\Container;
 use App\Framework\Logging\Logger;
+use App\Framework\Logging\ValueObjects\LogContext;
 
 final readonly class HttpMiddlewareChain implements HttpMiddlewareChainInterface
 {

src/Framework/Http/Middlewares/ExceptionHandlingMiddleware.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace App\Framework\Http\Middlewares;
 
 use App\Framework\ErrorHandling\ErrorHandler;
+use App\Framework\ExceptionHandling\ErrorKernel;
 use App\Framework\Http\HttpMiddleware;
 use App\Framework\Http\MiddlewareContext;
 use App\Framework\Http\MiddlewarePriority;
@@ -18,7 +19,7 @@ final readonly class ExceptionHandlingMiddleware implements HttpMiddleware
 {
     public function __construct(
         private Logger      $logger,
-        private ErrorHandler $errorHandler,
+        #private ErrorHandler $errorHandler,
     ) {
     }
 
@@ -27,6 +28,10 @@ final readonly class ExceptionHandlingMiddleware implements HttpMiddleware
         try {
             return $next($context);
         } catch (\Throwable $e) {
+
+            $error = new ErrorKernel();
+            $error->handle($e);
+
             $response = $this->errorHandler->createHttpResponse($e, $context);
 
             return $context->withResponse($response);