diff --git a/tests/aot/namespace/anonymous-class-ns.phpt b/tests/aot/namespace/anonymous-class-ns.phpt
new file mode 100644
index 00000000..3b188c8d
--- /dev/null
+++ b/tests/aot/namespace/anonymous-class-ns.phpt
@@ -0,0 +1,35 @@
+--TEST--
+Anonymous class inside namespace
+--FILE--
+<?php
+namespace App\Factory {
+    interface Greeter {
+        public function greet(string $name): string;
+    }
+
+    function createGreeter(string $prefix): Greeter {
+        return new class($prefix) implements Greeter {
+            private string $prefix;
+            public function __construct(string $prefix) {
+                $this->prefix = $prefix;
+            }
+            public function greet(string $name): string {
+                return $this->prefix . " " . $name;
+            }
+        };
+    }
+}
+
+namespace {
+    use function App\Factory\createGreeter;
+
+    function main() {
+        $g = createGreeter("Hello");
+        var_dump($g->greet("World"));
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+string(11) "Hello World"
+done
diff --git a/tests/aot/namespace/class-const-ref.phpt b/tests/aot/namespace/class-const-ref.phpt
new file mode 100644
index 00000000..68cb2f95
--- /dev/null
+++ b/tests/aot/namespace/class-const-ref.phpt
@@ -0,0 +1,61 @@
+--TEST--
+Class constant references across namespaces
+--FILE--
+<?php
+namespace Core\Status {
+    class HttpStatus {
+        public const OK = 200;
+        public const NOT_FOUND = 404;
+        public const SERVER_ERROR = 500;
+    }
+
+    class AppConfig {
+        public const MAX_CONNECTIONS = 100;
+        public const TIMEOUT = 30;
+    }
+}
+
+namespace Services {
+    use Core\Status\HttpStatus;
+    use Core\Status\AppConfig;
+
+    class ApiClient {
+        public static function check(int $code): string {
+            switch ($code) {
+                case HttpStatus::OK:
+                    return "success";
+                case HttpStatus::NOT_FOUND:
+                    return "not found";
+                case HttpStatus::SERVER_ERROR:
+                    return "error";
+                default:
+                    return "unknown";
+            }
+        }
+
+        public static function getMaxConnections(): int {
+            return AppConfig::MAX_CONNECTIONS;
+        }
+    }
+}
+
+namespace {
+    use Services\ApiClient;
+
+    function main() {
+        var_dump(ApiClient::check(200));
+        var_dump(ApiClient::check(404));
+        var_dump(ApiClient::check(500));
+        var_dump(ApiClient::getMaxConnections());
+        var_dump(\Core\Status\AppConfig::TIMEOUT);
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+string(7) "success"
+string(9) "not found"
+string(5) "error"
+int(100)
+int(30)
+done
diff --git a/tests/aot/namespace/cross-ns-inheritance.phpt b/tests/aot/namespace/cross-ns-inheritance.phpt
new file mode 100644
index 00000000..a5d6e5cb
--- /dev/null
+++ b/tests/aot/namespace/cross-ns-inheritance.phpt
@@ -0,0 +1,80 @@
+--TEST--
+Namespace with class inheritance across namespaces
+--FILE--
+<?php
+namespace Base\Entity {
+    abstract class Model {
+        protected string $table;
+
+        public function __construct(string $table) {
+            $this->table = $table;
+        }
+
+        public function getTable(): string {
+            return $this->table;
+        }
+
+        abstract public function fields(): array;
+    }
+}
+
+namespace App\Models {
+    use Base\Entity\Model;
+
+    class User extends Model {
+        public function __construct() {
+            parent::__construct("users");
+        }
+
+        public function fields(): array {
+            return ["id", "name", "email"];
+        }
+    }
+
+    class Product extends Model {
+        public function __construct() {
+            parent::__construct("products");
+        }
+
+        public function fields(): array {
+            return ["id", "title", "price"];
+        }
+    }
+}
+
+namespace {
+    use App\Models\User;
+    use App\Models\Product;
+
+    function main() {
+        $user = new User();
+        $product = new Product();
+
+        var_dump($user->getTable());
+        var_dump($user->fields());
+        var_dump($product->getTable());
+        var_dump($product->fields());
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+string(5) "users"
+array(3) {
+  [0]=>
+  string(2) "id"
+  [1]=>
+  string(4) "name"
+  [2]=>
+  string(5) "email"
+}
+string(8) "products"
+array(3) {
+  [0]=>
+  string(2) "id"
+  [1]=>
+  string(5) "title"
+  [2]=>
+  string(5) "price"
+}
+done
diff --git a/tests/aot/namespace/fully-qualified.phpt b/tests/aot/namespace/fully-qualified.phpt
new file mode 100644
index 00000000..6d83c83e
--- /dev/null
+++ b/tests/aot/namespace/fully-qualified.phpt
@@ -0,0 +1,41 @@
+--TEST--
+Fully qualified names vs relative names in namespace
+--FILE--
+<?php
+namespace Foo\Bar {
+    class Helper {
+        public static function version(): string {
+            return "1.0.0";
+        }
+    }
+
+    function baz(): string {
+        return "baz-in-foo-bar";
+    }
+}
+
+namespace Foo {
+    class Runner {
+        // Relative: Bar\Helper resolves to Foo\Bar\Helper
+        public static function run(): string {
+            return Bar\Helper::version();
+        }
+    }
+}
+
+namespace {
+    function main() {
+        // Fully qualified calls
+        var_dump(\Foo\Bar\Helper::version());
+        var_dump(\Foo\Bar\baz());
+        // Call into Foo namespace class
+        var_dump(\Foo\Runner::run());
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+string(5) "1.0.0"
+string(14) "baz-in-foo-bar"
+string(5) "1.0.0"
+done
diff --git a/tests/aot/namespace/group-use.phpt b/tests/aot/namespace/group-use.phpt
new file mode 100644
index 00000000..5f4a0a1a
--- /dev/null
+++ b/tests/aot/namespace/group-use.phpt
@@ -0,0 +1,46 @@
+--TEST--
+Group use imports for classes, functions, and constants
+--FILE--
+<?php
+namespace Vendor\Package {
+    class ClassA {
+        public static function name(): string { return "ClassA"; }
+    }
+    class ClassB {
+        public static function name(): string { return "ClassB"; }
+    }
+    class ClassC {
+        public static function name(): string { return "ClassC"; }
+    }
+    function funcA(): string { return "funcA"; }
+    function funcB(): string { return "funcB"; }
+    const CONST_A = "constA";
+    const CONST_B = "constB";
+}
+
+namespace {
+    use Vendor\Package\{ClassA, ClassB, ClassC};
+    use function Vendor\Package\{funcA, funcB};
+    use const Vendor\Package\{CONST_A, CONST_B};
+
+    function main() {
+        var_dump(ClassA::name());
+        var_dump(ClassB::name());
+        var_dump(ClassC::name());
+        var_dump(funcA());
+        var_dump(funcB());
+        var_dump(CONST_A);
+        var_dump(CONST_B);
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+string(6) "ClassA"
+string(6) "ClassB"
+string(6) "ClassC"
+string(5) "funcA"
+string(5) "funcB"
+string(6) "constA"
+string(6) "constB"
+done
diff --git a/tests/aot/namespace/interface-across-ns.phpt b/tests/aot/namespace/interface-across-ns.phpt
new file mode 100644
index 00000000..b6217a68
--- /dev/null
+++ b/tests/aot/namespace/interface-across-ns.phpt
@@ -0,0 +1,58 @@
+--TEST--
+Namespace with interface and implementation across namespaces
+--FILE--
+<?php
+namespace Contracts\Payment {
+    interface PaymentProcessor {
+        public function pay(float $amount): bool;
+        public function refund(float $amount): bool;
+    }
+}
+
+namespace Services\Payment {
+    use Contracts\Payment\PaymentProcessor;
+
+    class StripeProcessor implements PaymentProcessor {
+        private array $log = [];
+
+        public function pay(float $amount): bool {
+            $this->log[] = "paid:{$amount}";
+            return true;
+        }
+
+        public function refund(float $amount): bool {
+            $this->log[] = "refunded:{$amount}";
+            return true;
+        }
+
+        public function getLog(): array {
+            return $this->log;
+        }
+    }
+}
+
+namespace {
+    use Services\Payment\StripeProcessor;
+    use Contracts\Payment\PaymentProcessor;
+
+    function main() {
+        $p = new StripeProcessor();
+        var_dump($p->pay(100.0));
+        var_dump($p->refund(50.0));
+        var_dump($p->getLog());
+        var_dump($p instanceof PaymentProcessor);
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+bool(true)
+bool(true)
+array(2) {
+  [0]=>
+  string(8) "paid:100"
+  [1]=>
+  string(11) "refunded:50"
+}
+bool(true)
+done
diff --git a/tests/aot/namespace/mixed-use-imports.phpt b/tests/aot/namespace/mixed-use-imports.phpt
new file mode 100644
index 00000000..67775813
--- /dev/null
+++ b/tests/aot/namespace/mixed-use-imports.phpt
@@ -0,0 +1,51 @@
+--TEST--
+Mixed use class and use function imports
+--FILE--
+<?php
+namespace Utils\Str {
+    function slug(string $s): string {
+        return str_replace(" ", "-", strtolower($s));
+    }
+
+    function prefix(string $s, string $p): string {
+        return "{$p}:{$s}";
+    }
+}
+
+namespace Utils\Math {
+    function double(int $x): int {
+        return $x * 2;
+    }
+}
+
+namespace App {
+    use Utils\Str\slug;
+    use Utils\Str\prefix;
+    use function Utils\Math\double;
+
+    class TextHelper {
+        public static function normalize(string $text): string {
+            return slug(prefix($text, "msg"));
+        }
+    }
+
+    function compute(int $v): int {
+        return double($v);
+    }
+}
+
+namespace {
+    use App\TextHelper;
+    use function App\compute;
+
+    function main() {
+        var_dump(TextHelper::normalize("Hello World"));
+        var_dump(compute(21));
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+string(15) "msg:hello-world"
+int(42)
+done
diff --git a/tests/aot/namespace/namespace-constants.phpt b/tests/aot/namespace/namespace-constants.phpt
new file mode 100644
index 00000000..20597662
--- /dev/null
+++ b/tests/aot/namespace/namespace-constants.phpt
@@ -0,0 +1,43 @@
+--TEST--
+Namespace with constants defined via const keyword
+--FILE--
+<?php
+namespace Config\App {
+    const APP_NAME = "MyApp";
+    const VERSION = "2.0.0";
+    const DEBUG = true;
+
+    function getConfig(): array {
+        return [
+            "name" => APP_NAME,
+            "version" => VERSION,
+            "debug" => DEBUG,
+        ];
+    }
+}
+
+namespace {
+    use function Config\App\getConfig;
+
+    function main() {
+        var_dump(\Config\App\APP_NAME);
+        var_dump(\Config\App\VERSION);
+        var_dump(\Config\App\DEBUG);
+        var_dump(getConfig());
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+string(5) "MyApp"
+string(5) "2.0.0"
+bool(true)
+array(3) {
+  ["name"]=>
+  string(5) "MyApp"
+  ["version"]=>
+  string(5) "2.0.0"
+  ["debug"]=>
+  bool(true)
+}
+done
diff --git a/tests/aot/namespace/nested-namespace.phpt b/tests/aot/namespace/nested-namespace.phpt
new file mode 100644
index 00000000..6c7dc31f
--- /dev/null
+++ b/tests/aot/namespace/nested-namespace.phpt
@@ -0,0 +1,38 @@
+--TEST--
+Multi-level nested namespaces with classes and functions
+--FILE--
+<?php
+namespace App\Services\Payment {
+    class Gateway {
+        public static function process(string $type): string {
+            return "processed:{$type}";
+        }
+    }
+
+    function fee(int $amount): int {
+        return (int)($amount * 5 / 100);
+    }
+}
+
+namespace App\Controllers {
+    class OrderController {
+        public static function create(): string {
+            return \App\Services\Payment\Gateway::process("order");
+        }
+    }
+}
+
+namespace {
+    function main() {
+        var_dump(\App\Services\Payment\Gateway::process("sale"));
+        var_dump(\App\Services\Payment\fee(100));
+        var_dump(\App\Controllers\OrderController::create());
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+string(14) "processed:sale"
+int(5)
+string(15) "processed:order"
+done
diff --git a/tests/aot/namespace/self-static-cross-ns.phpt b/tests/aot/namespace/self-static-cross-ns.phpt
new file mode 100644
index 00000000..6706be8f
--- /dev/null
+++ b/tests/aot/namespace/self-static-cross-ns.phpt
@@ -0,0 +1,52 @@
+--TEST--
+self/static resolution with inheritance across namespaces
+--FILE--
+<?php
+namespace Base\Core {
+    class BaseController {
+        protected static string $prefix = "base";
+
+        public static function whoAmI(): string {
+            return static::$prefix;
+        }
+
+        public static function selfWhoAmI(): string {
+            return self::$prefix;
+        }
+    }
+}
+
+namespace App\Http {
+    use Base\Core\BaseController;
+
+    class UserController extends BaseController {
+        protected static string $prefix = "user";
+    }
+
+    class AdminController extends BaseController {
+        protected static string $prefix = "admin";
+    }
+}
+
+namespace {
+    use App\Http\UserController;
+    use App\Http\AdminController;
+    use Base\Core\BaseController;
+
+    function main() {
+        // static:: should resolve to the calling class
+        var_dump(UserController::whoAmI());
+        var_dump(AdminController::whoAmI());
+        // self:: should always resolve to BaseController
+        var_dump(BaseController::selfWhoAmI());
+        var_dump(UserController::selfWhoAmI());
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+string(4) "user"
+string(5) "admin"
+string(4) "base"
+string(4) "base"
+done
diff --git a/tests/aot/namespace/trait-across-ns.phpt b/tests/aot/namespace/trait-across-ns.phpt
new file mode 100644
index 00000000..6a03538e
--- /dev/null
+++ b/tests/aot/namespace/trait-across-ns.phpt
@@ -0,0 +1,67 @@
+--TEST--
+Trait used across namespaces
+--FILE--
+<?php
+namespace Base\Traits {
+    trait Logger {
+        private array $log = [];
+
+        public function log(string $msg): void {
+            $this->log[] = $msg;
+        }
+
+        public function getLog(): array {
+            return $this->log;
+        }
+    }
+}
+
+namespace App\Services {
+    use Base\Traits\Logger;
+
+    class OrderService {
+        use Logger;
+
+        public function createOrder(int $id): string {
+            $this->log("order:{$id}");
+            return "ok";
+        }
+    }
+
+    class UserService {
+        use Logger;
+
+        public function createUser(string $name): string {
+            $this->log("user:{$name}");
+            return "ok";
+        }
+    }
+}
+
+namespace {
+    use App\Services\OrderService;
+    use App\Services\UserService;
+
+    function main() {
+        $os = new OrderService();
+        $us = new UserService();
+
+        $os->createOrder(42);
+        $us->createUser("alice");
+
+        var_dump($os->getLog());
+        var_dump($us->getLog());
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+array(1) {
+  [0]=>
+  string(8) "order:42"
+}
+array(1) {
+  [0]=>
+  string(10) "user:alice"
+}
+done
diff --git a/tests/aot/namespace/use-alias.phpt b/tests/aot/namespace/use-alias.phpt
new file mode 100644
index 00000000..af1b885d
--- /dev/null
+++ b/tests/aot/namespace/use-alias.phpt
@@ -0,0 +1,35 @@
+--TEST--
+use alias for class names
+--FILE--
+<?php
+namespace Library\Storage\Drivers {
+    class FileDriver {
+        public function read(): string {
+            return "file:data";
+        }
+    }
+
+    class MemoryDriver {
+        public function read(): string {
+            return "memory:data";
+        }
+    }
+}
+
+namespace {
+    use Library\Storage\Drivers\FileDriver as FS;
+    use Library\Storage\Drivers\MemoryDriver as Mem;
+
+    function main() {
+        $fs = new FS();
+        $mem = new Mem();
+        var_dump($fs->read());
+        var_dump($mem->read());
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+string(9) "file:data"
+string(11) "memory:data"
+done
diff --git a/tests/aot/namespace/use-const.phpt b/tests/aot/namespace/use-const.phpt
new file mode 100644
index 00000000..be9fd972
--- /dev/null
+++ b/tests/aot/namespace/use-const.phpt
@@ -0,0 +1,39 @@
+--TEST--
+use const for importing namespace constants
+--FILE--
+<?php
+namespace Lib\Config {
+    const HOST = "localhost";
+    const PORT = 8080;
+    const DEBUG = true;
+}
+
+namespace App {
+    use const Lib\Config\HOST;
+    use const Lib\Config\PORT;
+    use const Lib\Config\DEBUG;
+
+    function getServer(): string {
+        return HOST . ":" . PORT;
+    }
+
+    function isDebug(): bool {
+        return DEBUG;
+    }
+}
+
+namespace {
+    use function App\getServer;
+    use function App\isDebug;
+
+    function main() {
+        var_dump(getServer());
+        var_dump(isDebug());
+        echo "done\n";
+    }
+}
+?>
+--EXPECT--
+string(14) "localhost:8080"
+bool(true)
+done