diff --git a/src/Client.php b/src/Client.php
index 095aff0..8266a89 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -22,29 +22,17 @@
 
 final class Client
 {
-    /** @var Maybe<Command> */
-    private Maybe $command;
-    /** @var callable(): Attempt<Connection> */
-    private $load;
-    private Filesystem $filesystem;
-    /** @var Maybe<CurrentProcess> */
-    private Maybe $signals;
-
     /**
      * @param Maybe<Command> $command
-     * @param callable(): Attempt<Connection> $load
+     * @param \Closure(): Attempt<Connection> $load
      * @param Maybe<CurrentProcess> $signals
      */
     private function __construct(
-        Maybe $command,
-        callable $load,
-        Filesystem $filesystem,
-        Maybe $signals,
+        private Maybe $command,
+        private \Closure $load,
+        private Filesystem $filesystem,
+        private Maybe $signals,
     ) {
-        $this->command = $command;
-        $this->load = $load;
-        $this->filesystem = $filesystem;
-        $this->signals = $signals;
     }
 
     /**
@@ -60,7 +48,7 @@ public static function of(callable $load, Filesystem $filesystem): self
 
         return new self(
             $command,
-            $load,
+            \Closure::fromCallable($load),
             $filesystem,
             $signals,
         );
diff --git a/src/Client/State.php b/src/Client/State.php
index c73ec6a..5a27655 100644
--- a/src/Client/State.php
+++ b/src/Client/State.php
@@ -5,11 +5,8 @@
 
 final class State
 {
-    private mixed $value;
-
-    private function __construct(mixed $value)
+    private function __construct(private mixed $value)
     {
-        $this->value = $value;
     }
 
     public static function of(mixed $value): self
diff --git a/src/Command/Bind.php b/src/Command/Bind.php
index 8a94029..d3bd8db 100644
--- a/src/Command/Bind.php
+++ b/src/Command/Bind.php
@@ -21,11 +21,8 @@
 
 final class Bind implements Command
 {
-    private Binding $command;
-
-    private function __construct(Binding $command)
+    private function __construct(private Binding $command)
     {
-        $this->command = $command;
     }
 
     #[\Override]
diff --git a/src/Command/Consume.php b/src/Command/Consume.php
index 66b4e5d..7c06cba 100644
--- a/src/Command/Consume.php
+++ b/src/Command/Consume.php
@@ -29,17 +29,13 @@
 
 final class Consume implements Command
 {
-    private Model $command;
-    /** @var callable(mixed, Message, Continuation, Details): Continuation */
-    private $consume;
-
     /**
-     * @param callable(mixed, Message, Continuation, Details): Continuation $consume
+     * @param \Closure(mixed, Message, Continuation, Details): Continuation $consume
      */
-    private function __construct(Model $command, callable $consume)
-    {
-        $this->command = $command;
-        $this->consume = $consume;
+    private function __construct(
+        private Model $command,
+        private \Closure $consume,
+    ) {
     }
 
     #[\Override]
@@ -89,7 +85,7 @@ public static function of(string $queue): self
     #[\NoDiscard]
     public function handle(callable $consume): self
     {
-        return new self($this->command, $consume);
+        return new self($this->command, \Closure::fromCallable($consume));
     }
 
     /**
diff --git a/src/Command/DeclareExchange.php b/src/Command/DeclareExchange.php
index 0606be9..2cc6610 100644
--- a/src/Command/DeclareExchange.php
+++ b/src/Command/DeclareExchange.php
@@ -22,11 +22,8 @@
 
 final class DeclareExchange implements Command
 {
-    private Declaration $command;
-
-    private function __construct(Declaration $command)
+    private function __construct(private Declaration $command)
     {
-        $this->command = $command;
     }
 
     #[\Override]
diff --git a/src/Command/DeclareQueue.php b/src/Command/DeclareQueue.php
index 4f922f6..f2ed83b 100644
--- a/src/Command/DeclareQueue.php
+++ b/src/Command/DeclareQueue.php
@@ -26,11 +26,8 @@
 
 final class DeclareQueue implements Command
 {
-    private Declaration $command;
-
-    private function __construct(Declaration $command)
+    private function __construct(private Declaration $command)
     {
-        $this->command = $command;
     }
 
     #[\Override]
diff --git a/src/Command/DeleteExchange.php b/src/Command/DeleteExchange.php
index 41d0559..73ff965 100644
--- a/src/Command/DeleteExchange.php
+++ b/src/Command/DeleteExchange.php
@@ -21,11 +21,8 @@
 
 final class DeleteExchange implements Command
 {
-    private Deletion $command;
-
-    private function __construct(Deletion $command)
+    private function __construct(private Deletion $command)
     {
-        $this->command = $command;
     }
 
     #[\Override]
diff --git a/src/Command/DeleteQueue.php b/src/Command/DeleteQueue.php
index 12c989f..9bc0c79 100644
--- a/src/Command/DeleteQueue.php
+++ b/src/Command/DeleteQueue.php
@@ -25,11 +25,8 @@
 
 final class DeleteQueue implements Command
 {
-    private Deletion $command;
-
-    private function __construct(Deletion $command)
+    private function __construct(private Deletion $command)
     {
-        $this->command = $command;
     }
 
     #[\Override]
diff --git a/src/Command/Get.php b/src/Command/Get.php
index 810da1b..43e46fd 100644
--- a/src/Command/Get.php
+++ b/src/Command/Get.php
@@ -29,21 +29,15 @@
 
 final class Get implements Command
 {
-    private Model $command;
-    /** @var callable(mixed, Message, Continuation, Details): Continuation */
-    private $consume;
-    /** @var positive-int */
-    private int $take;
-
     /**
-     * @param callable(mixed, Message, Continuation, Details): Continuation $consume
-     * @param positive-int $take
+     * @param \Closure(mixed, Message, Continuation, Details): Continuation $consume
+     * @param int<1, max> $take
      */
-    private function __construct(Model $command, callable $consume, int $take)
-    {
-        $this->command = $command;
-        $this->consume = $consume;
-        $this->take = $take;
+    private function __construct(
+        private Model $command,
+        private \Closure $consume,
+        private int $take,
+    ) {
     }
 
     #[\Override]
@@ -79,11 +73,11 @@ public static function of(string $queue): self
     #[\NoDiscard]
     public function handle(callable $consume): self
     {
-        return new self($this->command, $consume, $this->take);
+        return new self($this->command, \Closure::fromCallable($consume), $this->take);
     }
 
     /**
-     * @param positive-int $take
+     * @param int<1, max> $take
      */
     #[\NoDiscard]
     public function take(int $take): self
diff --git a/src/Command/Pipe.php b/src/Command/Pipe.php
index a13b272..628a4ce 100644
--- a/src/Command/Pipe.php
+++ b/src/Command/Pipe.php
@@ -17,13 +17,10 @@
  */
 final class Pipe implements Command
 {
-    private Command $first;
-    private Command $second;
-
-    public function __construct(Command $first, Command $second)
-    {
-        $this->first = $first;
-        $this->second = $second;
+    public function __construct(
+        private Command $first,
+        private Command $second,
+    ) {
     }
 
     #[\Override]
diff --git a/src/Command/Publish.php b/src/Command/Publish.php
index 83e330b..197914c 100644
--- a/src/Command/Publish.php
+++ b/src/Command/Publish.php
@@ -21,15 +21,11 @@
 
 final class Publish implements Command
 {
-    /** @var Sequence<Model> */
-    private Sequence $commands;
-
     /**
      * @param Sequence<Model> $commands
      */
-    private function __construct(Sequence $commands)
+    private function __construct(private Sequence $commands)
     {
-        $this->commands = $commands;
     }
 
     #[\Override]
diff --git a/src/Command/Purge.php b/src/Command/Purge.php
index 7694181..e9ac028 100644
--- a/src/Command/Purge.php
+++ b/src/Command/Purge.php
@@ -25,11 +25,8 @@
 
 final class Purge implements Command
 {
-    private Model $command;
-
-    private function __construct(Model $command)
+    private function __construct(private Model $command)
     {
-        $this->command = $command;
     }
 
     #[\Override]
diff --git a/src/Command/Qos.php b/src/Command/Qos.php
index 1dbc95a..1db34e8 100644
--- a/src/Command/Qos.php
+++ b/src/Command/Qos.php
@@ -17,11 +17,8 @@
 
 final class Qos implements Command
 {
-    private Model $command;
-
-    private function __construct(Model $command)
+    private function __construct(private Model $command)
     {
-        $this->command = $command;
     }
 
     #[\Override]
diff --git a/src/Command/Transaction.php b/src/Command/Transaction.php
index b5c78f4..6f2cb6f 100644
--- a/src/Command/Transaction.php
+++ b/src/Command/Transaction.php
@@ -16,17 +16,13 @@
 
 final class Transaction implements Command
 {
-    private Command $command;
-    /** @var callable(mixed): bool */
-    private $predicate;
-
     /**
-     * @param callable(mixed): bool $predicate
+     * @param \Closure(mixed): bool $predicate
      */
-    private function __construct(Command $command, callable $predicate)
-    {
-        $this->command = $command;
-        $this->predicate = $predicate;
+    private function __construct(
+        private Command $command,
+        private \Closure $predicate,
+    ) {
     }
 
     #[\Override]
@@ -59,7 +55,7 @@ public static function of(
         callable $predicate,
         Command $command,
     ): self {
-        return new self($command, $predicate);
+        return new self($command, \Closure::fromCallable($predicate));
     }
 
     #[\NoDiscard]
diff --git a/src/Command/Unbind.php b/src/Command/Unbind.php
index 64ec6b6..23efa80 100644
--- a/src/Command/Unbind.php
+++ b/src/Command/Unbind.php
@@ -17,11 +17,8 @@
 
 final class Unbind implements Command
 {
-    private Unbinding $command;
-
-    private function __construct(Unbinding $command)
+    private function __construct(private Unbinding $command)
     {
-        $this->command = $command;
     }
 
     #[\Override]
diff --git a/src/Consumer/Canceled.php b/src/Consumer/Canceled.php
index b186a0e..358f4da 100644
--- a/src/Consumer/Canceled.php
+++ b/src/Consumer/Canceled.php
@@ -10,11 +10,8 @@
  */
 final class Canceled
 {
-    private State $state;
-
-    private function __construct(State $state)
+    private function __construct(private State $state)
     {
-        $this->state = $state;
     }
 
     public static function of(State $state): self
diff --git a/src/Consumer/Continuation.php b/src/Consumer/Continuation.php
index ed7ddee..ee5d981 100644
--- a/src/Consumer/Continuation.php
+++ b/src/Consumer/Continuation.php
@@ -23,13 +23,10 @@
 
 final class Continuation
 {
-    private Client\State $state;
-    private State $response;
-
-    private function __construct(Client\State $state, State $response)
-    {
-        $this->state = $state;
-        $this->response = $response;
+    private function __construct(
+        private Client\State $state,
+        private State $response,
+    ) {
     }
 
     #[\NoDiscard]
diff --git a/src/Consumer/Details.php b/src/Consumer/Details.php
index 8c32623..8a924c4 100644
--- a/src/Consumer/Details.php
+++ b/src/Consumer/Details.php
@@ -11,30 +11,17 @@
  */
 final class Details
 {
-    /** @var int<0, max> */
-    private int $deliveryTag;
-    private bool $redelivered;
-    private string $exchange;
-    private string $routingKey;
-    /** @var Maybe<Count> */
-    private Maybe $messages;
-
     /**
      * @param int<0, max> $deliveryTag
      * @param Maybe<Count> $messages
      */
     private function __construct(
-        int $deliveryTag,
-        bool $redelivered,
-        string $exchange,
-        string $routingKey,
-        Maybe $messages,
+        private int $deliveryTag,
+        private bool $redelivered,
+        private string $exchange,
+        private string $routingKey,
+        private Maybe $messages,
     ) {
-        $this->deliveryTag = $deliveryTag;
-        $this->redelivered = $redelivered;
-        $this->exchange = $exchange;
-        $this->routingKey = $routingKey;
-        $this->messages = $messages;
     }
 
     /**
diff --git a/src/Factory.php b/src/Factory.php
index 6c99f6c..25d7598 100644
--- a/src/Factory.php
+++ b/src/Factory.php
@@ -10,11 +10,8 @@
 
 final class Factory
 {
-    private OperatingSystem $os;
-
-    private function __construct(OperatingSystem $os)
+    private function __construct(private OperatingSystem $os)
     {
-        $this->os = $os;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ClosedByServer.php b/src/Failure/ClosedByServer.php
index 7fa8c03..90d5659 100644
--- a/src/Failure/ClosedByServer.php
+++ b/src/Failure/ClosedByServer.php
@@ -11,23 +11,17 @@
  */
 final class ClosedByServer
 {
-    private string $message;
-    /** @var int<0, 65535> */
-    private int $code;
-    /** @var Maybe<Method> */
-    private Maybe $method;
-
     /**
      * @internal
      *
      * @param int<0, 65535> $code
      * @param Maybe<Method> $method
      */
-    public function __construct(string $message, int $code, Maybe $method)
-    {
-        $this->message = $message;
-        $this->code = $code;
-        $this->method = $method;
+    public function __construct(
+        private string $message,
+        private int $code,
+        private Maybe $method,
+    ) {
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ClosedBySignal.php b/src/Failure/ClosedBySignal.php
index 0bf97e2..314431a 100644
--- a/src/Failure/ClosedBySignal.php
+++ b/src/Failure/ClosedBySignal.php
@@ -10,14 +10,11 @@
  */
 final class ClosedBySignal
 {
-    private Signal $signal;
-
     /**
      * @internal
      */
-    public function __construct(Signal $signal)
+    public function __construct(private Signal $signal)
     {
-        $this->signal = $signal;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToAck.php b/src/Failure/ToAck.php
index ec61c19..45d60dc 100644
--- a/src/Failure/ToAck.php
+++ b/src/Failure/ToAck.php
@@ -8,14 +8,11 @@
  */
 final class ToAck
 {
-    private string $queue;
-
     /**
      * @internal
      */
-    public function __construct(string $queue)
+    public function __construct(private string $queue)
     {
-        $this->queue = $queue;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToBind.php b/src/Failure/ToBind.php
index 334f9cf..8a824ac 100644
--- a/src/Failure/ToBind.php
+++ b/src/Failure/ToBind.php
@@ -10,14 +10,11 @@
  */
 final class ToBind
 {
-    private Command $command;
-
     /**
      * @internal
      */
-    public function __construct(Command $command)
+    public function __construct(private Command $command)
     {
-        $this->command = $command;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToCancel.php b/src/Failure/ToCancel.php
index a6230a1..3543177 100644
--- a/src/Failure/ToCancel.php
+++ b/src/Failure/ToCancel.php
@@ -8,14 +8,11 @@
  */
 final class ToCancel
 {
-    private string $queue;
-
     /**
      * @internal
      */
-    public function __construct(string $queue)
+    public function __construct(private string $queue)
     {
-        $this->queue = $queue;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToConsume.php b/src/Failure/ToConsume.php
index a4a5a3e..4c7a44c 100644
--- a/src/Failure/ToConsume.php
+++ b/src/Failure/ToConsume.php
@@ -10,14 +10,11 @@
  */
 final class ToConsume
 {
-    private Command $command;
-
     /**
      * @internal
      */
-    public function __construct(Command $command)
+    public function __construct(private Command $command)
     {
-        $this->command = $command;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToDeclareExchange.php b/src/Failure/ToDeclareExchange.php
index 624b2c1..071f7be 100644
--- a/src/Failure/ToDeclareExchange.php
+++ b/src/Failure/ToDeclareExchange.php
@@ -10,14 +10,11 @@
  */
 final class ToDeclareExchange
 {
-    private Command $command;
-
     /**
      * @internal
      */
-    public function __construct(Command $command)
+    public function __construct(private Command $command)
     {
-        $this->command = $command;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToDeclareQueue.php b/src/Failure/ToDeclareQueue.php
index 7343f3c..e45476a 100644
--- a/src/Failure/ToDeclareQueue.php
+++ b/src/Failure/ToDeclareQueue.php
@@ -10,14 +10,11 @@
  */
 final class ToDeclareQueue
 {
-    private Command $command;
-
     /**
      * @internal
      */
-    public function __construct(Command $command)
+    public function __construct(private Command $command)
     {
-        $this->command = $command;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToDeleteExchange.php b/src/Failure/ToDeleteExchange.php
index 2bd5e17..3fa0fff 100644
--- a/src/Failure/ToDeleteExchange.php
+++ b/src/Failure/ToDeleteExchange.php
@@ -10,14 +10,11 @@
  */
 final class ToDeleteExchange
 {
-    private Command $command;
-
     /**
      * @internal
      */
-    public function __construct(Command $command)
+    public function __construct(private Command $command)
     {
-        $this->command = $command;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToDeleteQueue.php b/src/Failure/ToDeleteQueue.php
index 0699eea..5c7ac0d 100644
--- a/src/Failure/ToDeleteQueue.php
+++ b/src/Failure/ToDeleteQueue.php
@@ -10,14 +10,11 @@
  */
 final class ToDeleteQueue
 {
-    private Command $command;
-
     /**
      * @internal
      */
-    public function __construct(Command $command)
+    public function __construct(private Command $command)
     {
-        $this->command = $command;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToGet.php b/src/Failure/ToGet.php
index 0042109..b84b2db 100644
--- a/src/Failure/ToGet.php
+++ b/src/Failure/ToGet.php
@@ -10,14 +10,11 @@
  */
 final class ToGet
 {
-    private Command $command;
-
     /**
      * @internal
      */
-    public function __construct(Command $command)
+    public function __construct(private Command $command)
     {
-        $this->command = $command;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToPublish.php b/src/Failure/ToPublish.php
index de2e15b..b4f4ca5 100644
--- a/src/Failure/ToPublish.php
+++ b/src/Failure/ToPublish.php
@@ -10,14 +10,11 @@
  */
 final class ToPublish
 {
-    private Command $command;
-
     /**
      * @internal
      */
-    public function __construct(Command $command)
+    public function __construct(private Command $command)
     {
-        $this->command = $command;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToPurge.php b/src/Failure/ToPurge.php
index df062b7..8c4c787 100644
--- a/src/Failure/ToPurge.php
+++ b/src/Failure/ToPurge.php
@@ -10,14 +10,11 @@
  */
 final class ToPurge
 {
-    private Command $command;
-
     /**
      * @internal
      */
-    public function __construct(Command $command)
+    public function __construct(private Command $command)
     {
-        $this->command = $command;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToRecover.php b/src/Failure/ToRecover.php
index 5b989b1..d2e4aa4 100644
--- a/src/Failure/ToRecover.php
+++ b/src/Failure/ToRecover.php
@@ -8,14 +8,11 @@
  */
 final class ToRecover
 {
-    private string $queue;
-
     /**
      * @internal
      */
-    public function __construct(string $queue)
+    public function __construct(private string $queue)
     {
-        $this->queue = $queue;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToReject.php b/src/Failure/ToReject.php
index fe445a5..030df1a 100644
--- a/src/Failure/ToReject.php
+++ b/src/Failure/ToReject.php
@@ -8,14 +8,11 @@
  */
 final class ToReject
 {
-    private string $queue;
-
     /**
      * @internal
      */
-    public function __construct(string $queue)
+    public function __construct(private string $queue)
     {
-        $this->queue = $queue;
     }
 
     #[\NoDiscard]
diff --git a/src/Failure/ToUnbind.php b/src/Failure/ToUnbind.php
index c05aee9..55b1fc2 100644
--- a/src/Failure/ToUnbind.php
+++ b/src/Failure/ToUnbind.php
@@ -10,14 +10,11 @@
  */
 final class ToUnbind
 {
-    private Command $command;
-
     /**
      * @internal
      */
-    public function __construct(Command $command)
+    public function __construct(private Command $command)
     {
-        $this->command = $command;
     }
 
     #[\NoDiscard]
diff --git a/src/Model/Basic/Message/AppId.php b/src/Model/Basic/Message/AppId.php
index e02b556..e920813 100644
--- a/src/Model/Basic/Message/AppId.php
+++ b/src/Model/Basic/Message/AppId.php
@@ -12,11 +12,8 @@
  */
 final class AppId
 {
-    private string $value;
-
-    private function __construct(string $value)
+    private function __construct(private string $value)
     {
-        $this->value = $value;
     }
 
     /**
diff --git a/src/Model/Basic/Message/ContentEncoding.php b/src/Model/Basic/Message/ContentEncoding.php
index fede9e2..1118ca2 100644
--- a/src/Model/Basic/Message/ContentEncoding.php
+++ b/src/Model/Basic/Message/ContentEncoding.php
@@ -16,11 +16,8 @@
  */
 final class ContentEncoding
 {
-    private string $value;
-
-    private function __construct(string $value)
+    private function __construct(private string $value)
     {
-        $this->value = $value;
     }
 
     /**
diff --git a/src/Model/Basic/Message/CorrelationId.php b/src/Model/Basic/Message/CorrelationId.php
index 299b2f4..552575e 100644
--- a/src/Model/Basic/Message/CorrelationId.php
+++ b/src/Model/Basic/Message/CorrelationId.php
@@ -10,11 +10,8 @@
  */
 final class CorrelationId
 {
-    private string $value;
-
-    private function __construct(string $value)
+    private function __construct(private string $value)
     {
-        $this->value = $value;
     }
 
     /**
diff --git a/src/Model/Basic/Message/Id.php b/src/Model/Basic/Message/Id.php
index f65732f..9f413cf 100644
--- a/src/Model/Basic/Message/Id.php
+++ b/src/Model/Basic/Message/Id.php
@@ -10,11 +10,8 @@
  */
 final class Id
 {
-    private string $value;
-
-    private function __construct(string $value)
+    private function __construct(private string $value)
     {
-        $this->value = $value;
     }
 
     /**
diff --git a/src/Model/Basic/Message/ReplyTo.php b/src/Model/Basic/Message/ReplyTo.php
index fa152a3..d7b034f 100644
--- a/src/Model/Basic/Message/ReplyTo.php
+++ b/src/Model/Basic/Message/ReplyTo.php
@@ -11,11 +11,8 @@
  */
 final class ReplyTo
 {
-    private string $value;
-
-    private function __construct(string $value)
+    private function __construct(private string $value)
     {
-        $this->value = $value;
     }
 
     /**
diff --git a/src/Model/Basic/Message/Type.php b/src/Model/Basic/Message/Type.php
index 59192be..9645423 100644
--- a/src/Model/Basic/Message/Type.php
+++ b/src/Model/Basic/Message/Type.php
@@ -8,11 +8,8 @@
  */
 final class Type
 {
-    private string $value;
-
-    private function __construct(string $value)
+    private function __construct(private string $value)
     {
-        $this->value = $value;
     }
 
     /**
diff --git a/src/Model/Basic/Message/UserId.php b/src/Model/Basic/Message/UserId.php
index 2bf3a5e..e7acd2a 100644
--- a/src/Model/Basic/Message/UserId.php
+++ b/src/Model/Basic/Message/UserId.php
@@ -10,11 +10,8 @@
  */
 final class UserId
 {
-    private string $value;
-
-    private function __construct(string $value)
+    private function __construct(private string $value)
     {
-        $this->value = $value;
     }
 
     /**
diff --git a/src/Model/Basic/Recover.php b/src/Model/Basic/Recover.php
index 8d443b8..2e0aeb6 100644
--- a/src/Model/Basic/Recover.php
+++ b/src/Model/Basic/Recover.php
@@ -8,11 +8,8 @@
  */
 final class Recover
 {
-    private bool $requeue = false;
-
-    private function __construct(bool $requeue)
+    private function __construct(private bool $requeue)
     {
-        $this->requeue = $requeue;
     }
 
     /**
diff --git a/src/Model/Channel/FlowOk.php b/src/Model/Channel/FlowOk.php
index e15c555..32ff55d 100644
--- a/src/Model/Channel/FlowOk.php
+++ b/src/Model/Channel/FlowOk.php
@@ -8,11 +8,8 @@
  */
 final class FlowOk
 {
-    private bool $active;
-
-    private function __construct(bool $active)
+    private function __construct(private bool $active)
     {
-        $this->active = $active;
     }
 
     /**
diff --git a/src/Model/Connection/MaxChannels.php b/src/Model/Connection/MaxChannels.php
index 0d41b4f..d1f2ed4 100644
--- a/src/Model/Connection/MaxChannels.php
+++ b/src/Model/Connection/MaxChannels.php
@@ -14,15 +14,11 @@
  */
 final class MaxChannels
 {
-    /** @var int<0, 65535> */
-    private int $value;
-
     /**
      * @param int<0, 65535> $value
      */
-    private function __construct(int $value)
+    private function __construct(private int $value)
     {
-        $this->value = $value;
     }
 
     /**
diff --git a/src/Model/Connection/MaxFrameSize.php b/src/Model/Connection/MaxFrameSize.php
index 970f293..426cdea 100644
--- a/src/Model/Connection/MaxFrameSize.php
+++ b/src/Model/Connection/MaxFrameSize.php
@@ -19,15 +19,11 @@
  */
 final class MaxFrameSize
 {
-    /** @var int<0, 4294967295> */
-    private int $value;
-
     /**
      * @param int<0, 4294967295> $value
      */
-    private function __construct(int $value)
+    private function __construct(private int $value)
     {
-        $this->value = $value;
     }
 
     /**
@@ -51,8 +47,8 @@ public static function unlimited(): self
     }
 
     /**
-     * @psalm-assert-if-true positive-int $this->value
-     * @psalm-assert-if-true positive-int $this->toInt()
+     * @psalm-assert-if-true int<1, max> $this->value
+     * @psalm-assert-if-true int<1, max> $this->toInt()
      */
     #[\NoDiscard]
     public function isLimited(): bool
diff --git a/src/Model/Connection/Open.php b/src/Model/Connection/Open.php
index 588b85a..db7b166 100644
--- a/src/Model/Connection/Open.php
+++ b/src/Model/Connection/Open.php
@@ -10,11 +10,8 @@
  */
 final class Open
 {
-    private Path $virtualHost;
-
-    private function __construct(Path $virtualHost)
+    private function __construct(private Path $virtualHost)
     {
-        $this->virtualHost = $virtualHost;
     }
 
     /**
diff --git a/src/Model/Connection/SecureOk.php b/src/Model/Connection/SecureOk.php
index 161d74f..8572b6c 100644
--- a/src/Model/Connection/SecureOk.php
+++ b/src/Model/Connection/SecureOk.php
@@ -13,13 +13,10 @@
  */
 final class SecureOk
 {
-    private User $user;
-    private Password $password;
-
-    private function __construct(User $user, Password $password)
-    {
-        $this->user = $user;
-        $this->password = $password;
+    private function __construct(
+        private User $user,
+        private Password $password,
+    ) {
     }
 
     /**
diff --git a/src/Model/Connection/StartOk.php b/src/Model/Connection/StartOk.php
index 5a4f1f5..25db7e0 100644
--- a/src/Model/Connection/StartOk.php
+++ b/src/Model/Connection/StartOk.php
@@ -13,13 +13,10 @@
  */
 final class StartOk
 {
-    private User $user;
-    private Password $password;
-
-    private function __construct(User $user, Password $password)
-    {
-        $this->user = $user;
-        $this->password = $password;
+    private function __construct(
+        private User $user,
+        private Password $password,
+    ) {
     }
 
     /**
diff --git a/src/Model/Connection/TuneOk.php b/src/Model/Connection/TuneOk.php
index 4a8494a..20c428e 100644
--- a/src/Model/Connection/TuneOk.php
+++ b/src/Model/Connection/TuneOk.php
@@ -10,18 +10,11 @@
  */
 final class TuneOk
 {
-    private MaxChannels $maxChannels;
-    private MaxFrameSize $maxFrameSize;
-    private Period $heartbeat;
-
     private function __construct(
-        MaxChannels $maxChannels,
-        MaxFrameSize $maxFrameSize,
-        Period $heartbeat,
+        private MaxChannels $maxChannels,
+        private MaxFrameSize $maxFrameSize,
+        private Period $heartbeat,
     ) {
-        $this->maxChannels = $maxChannels;
-        $this->maxFrameSize = $maxFrameSize;
-        $this->heartbeat = $heartbeat;
     }
 
     /**
diff --git a/src/Model/Count.php b/src/Model/Count.php
index 3ad9506..f0f88b2 100644
--- a/src/Model/Count.php
+++ b/src/Model/Count.php
@@ -8,15 +8,11 @@
  */
 final class Count
 {
-    /** @var int<0, max> */
-    private int $value;
-
     /**
      * @param int<0, max> $value
      */
-    private function __construct(int $value)
+    private function __construct(private int $value)
     {
-        $this->value = $value;
     }
 
     /**
diff --git a/src/Model/Queue/DeclareOk.php b/src/Model/Queue/DeclareOk.php
index ca47686..089ad60 100644
--- a/src/Model/Queue/DeclareOk.php
+++ b/src/Model/Queue/DeclareOk.php
@@ -10,15 +10,11 @@
  */
 final class DeclareOk
 {
-    private string $name;
-    private Count $message;
-    private Count $consumer;
-
-    private function __construct(string $name, Count $message, Count $consumer)
-    {
-        $this->name = $name;
-        $this->message = $message;
-        $this->consumer = $consumer;
+    private function __construct(
+        private string $name,
+        private Count $message,
+        private Count $consumer,
+    ) {
     }
 
     /**
diff --git a/src/Model/Queue/DeleteOk.php b/src/Model/Queue/DeleteOk.php
index eb789d8..45ed939 100644
--- a/src/Model/Queue/DeleteOk.php
+++ b/src/Model/Queue/DeleteOk.php
@@ -10,11 +10,8 @@
  */
 final class DeleteOk
 {
-    private Count $message;
-
-    private function __construct(Count $message)
+    private function __construct(private Count $message)
     {
-        $this->message = $message;
     }
 
     /**
diff --git a/src/Model/Queue/PurgeOk.php b/src/Model/Queue/PurgeOk.php
index 3e5925f..18ed6ce 100644
--- a/src/Model/Queue/PurgeOk.php
+++ b/src/Model/Queue/PurgeOk.php
@@ -10,11 +10,8 @@
  */
 final class PurgeOk
 {
-    private Count $message;
-
-    private function __construct(Count $message)
+    private function __construct(private Count $message)
     {
-        $this->message = $message;
     }
 
     /**
diff --git a/src/Transport/Connection.php b/src/Transport/Connection.php
index 8d868f4..a27b110 100644
--- a/src/Transport/Connection.php
+++ b/src/Transport/Connection.php
@@ -46,35 +46,19 @@
  */
 final class Connection
 {
-    private Protocol $protocol;
-    private Client $socket;
-    /** @var IOFrame<Frame> */
-    private IOFrame $frame;
-    private MaxChannels $maxChannels;
-    private MaxFrameSize $maxFrameSize;
-    private Heartbeat $heartbeat;
-    private SignalListener $signals;
-    private bool $closed = false;
-
     /**
      * @param IOFrame<Frame> $frame
      */
     private function __construct(
-        Protocol $protocol,
-        Heartbeat $heartbeat,
-        Client $socket,
-        MaxChannels $maxChannels,
-        MaxFrameSize $maxFrameSize,
-        IOFrame $frame,
-        SignalListener $signals,
+        private Protocol $protocol,
+        private Heartbeat $heartbeat,
+        private Client $socket,
+        private MaxChannels $maxChannels,
+        private MaxFrameSize $maxFrameSize,
+        private IOFrame $frame,
+        private SignalListener $signals,
+        private bool $closed = false,
     ) {
-        $this->protocol = $protocol;
-        $this->socket = $socket;
-        $this->frame = $frame;
-        $this->maxChannels = $maxChannels;
-        $this->maxFrameSize = $maxFrameSize;
-        $this->heartbeat = $heartbeat;
-        $this->signals = $signals;
     }
 
     /**
@@ -197,7 +181,7 @@ public function close(): Attempt
                 Method::connectionCloseOk,
             )
             ->flatMap(fn() => $this->socket->close())
-            ->map(static fn() => new SideEffect);
+            ->map(SideEffect::identity(...));
     }
 
     /**
@@ -270,7 +254,7 @@ private function sendFrames(callable $frames): Attempt
             ->abortWhen($this->signals->notified(...))
             ->sinkAttempts($data)
             ->eitherWay(
-                static fn() => Attempt::result(new SideEffect),
+                static fn() => Attempt::result(SideEffect::identity()),
                 fn() => $this->signals->close(
                     $this,
                     static fn() => Attempt::error(Failure::toSendFrame()),
diff --git a/src/Transport/Connection/Handshake.php b/src/Transport/Connection/Handshake.php
index d2b1d99..c975852 100644
--- a/src/Transport/Connection/Handshake.php
+++ b/src/Transport/Connection/Handshake.php
@@ -26,11 +26,8 @@
  */
 final class Handshake
 {
-    private Authority $authority;
-
-    public function __construct(Authority $authority)
+    public function __construct(private Authority $authority)
     {
-        $this->authority = $authority;
     }
 
     /**
diff --git a/src/Transport/Connection/Heartbeat.php b/src/Transport/Connection/Heartbeat.php
index 8892885..732ac79 100644
--- a/src/Transport/Connection/Heartbeat.php
+++ b/src/Transport/Connection/Heartbeat.php
@@ -18,18 +18,11 @@
  */
 final class Heartbeat
 {
-    private Clock $clock;
-    private Period $threshold;
-    private PointInTime $lastReceivedData;
-
     private function __construct(
-        Clock $clock,
-        Period $threshold,
-        PointInTime $lastReceivedData,
+        private Clock $clock,
+        private Period $threshold,
+        private PointInTime $lastReceivedData,
     ) {
-        $this->clock = $clock;
-        $this->threshold = $threshold;
-        $this->lastReceivedData = $lastReceivedData;
     }
 
     public static function start(Clock $clock, Period $threshold): self
diff --git a/src/Transport/Connection/MessageReader.php b/src/Transport/Connection/MessageReader.php
index a18d3c5..e2e6888 100644
--- a/src/Transport/Connection/MessageReader.php
+++ b/src/Transport/Connection/MessageReader.php
@@ -38,11 +38,8 @@
  */
 final class MessageReader
 {
-    private Filesystem $filesystem;
-
-    private function __construct(Filesystem $filesystem)
+    private function __construct(private Filesystem $filesystem)
     {
-        $this->filesystem = $filesystem;
     }
 
     /**
diff --git a/src/Transport/Connection/OpenVHost.php b/src/Transport/Connection/OpenVHost.php
index b6285fa..7fdb167 100644
--- a/src/Transport/Connection/OpenVHost.php
+++ b/src/Transport/Connection/OpenVHost.php
@@ -16,11 +16,8 @@
  */
 final class OpenVHost
 {
-    private Path $vhost;
-
-    public function __construct(Path $vhost)
+    public function __construct(private Path $vhost)
     {
-        $this->vhost = $vhost;
     }
 
     /**
diff --git a/src/Transport/Connection/Start.php b/src/Transport/Connection/Start.php
index 7625c4e..a32a0e7 100644
--- a/src/Transport/Connection/Start.php
+++ b/src/Transport/Connection/Start.php
@@ -16,11 +16,8 @@
  */
 final class Start
 {
-    private Authority $authority;
-
-    public function __construct(Authority $authority)
+    public function __construct(private Authority $authority)
     {
-        $this->authority = $authority;
     }
 
     /**
diff --git a/src/Transport/Frame/Channel.php b/src/Transport/Frame/Channel.php
index 0fecaae..602b657 100644
--- a/src/Transport/Frame/Channel.php
+++ b/src/Transport/Frame/Channel.php
@@ -9,15 +9,11 @@
  */
 final class Channel
 {
-    /** @var int<0, 65535> */
-    private int $value;
-
     /**
      * @param int<0, 65535> $value
      */
-    public function __construct(int $value)
+    public function __construct(private int $value)
     {
-        $this->value = $value;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/Bits.php b/src/Transport/Frame/Value/Bits.php
index 2ab2473..7479f15 100644
--- a/src/Transport/Frame/Value/Bits.php
+++ b/src/Transport/Frame/Value/Bits.php
@@ -17,15 +17,11 @@
  */
 final class Bits implements Value
 {
-    /** @var Sequence<bool> */
-    private Sequence $original;
-
     /**
      * @param Sequence<bool> $original
      */
-    private function __construct(Sequence $original)
+    private function __construct(private Sequence $original)
     {
-        $this->original = $original;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/Decimal.php b/src/Transport/Frame/Value/Decimal.php
index bf8ad27..d3f3436 100644
--- a/src/Transport/Frame/Value/Decimal.php
+++ b/src/Transport/Frame/Value/Decimal.php
@@ -13,13 +13,10 @@
  */
 final class Decimal implements Value
 {
-    private SignedLongInteger $value;
-    private UnsignedOctet $scale;
-
-    private function __construct(SignedLongInteger $value, UnsignedOctet $scale)
-    {
-        $this->scale = $scale;
-        $this->value = $value;
+    private function __construct(
+        private SignedLongInteger $value,
+        private UnsignedOctet $scale,
+    ) {
     }
 
     /**
diff --git a/src/Transport/Frame/Value/LongString.php b/src/Transport/Frame/Value/LongString.php
index 7d96785..1e71c9e 100644
--- a/src/Transport/Frame/Value/LongString.php
+++ b/src/Transport/Frame/Value/LongString.php
@@ -17,11 +17,8 @@
  */
 final class LongString implements Value
 {
-    private Str $original;
-
-    private function __construct(Str $string)
+    private function __construct(private Str $original)
     {
-        $this->original = $string;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/Sequence.php b/src/Transport/Frame/Value/Sequence.php
index a50b476..66a6dad 100644
--- a/src/Transport/Frame/Value/Sequence.php
+++ b/src/Transport/Frame/Value/Sequence.php
@@ -26,15 +26,11 @@
  */
 final class Sequence implements Value
 {
-    /** @var Seq<Value> */
-    private Seq $original;
-
     /**
-     * @param Seq<Value> $values
+     * @param Seq<Value> $original
      */
-    private function __construct(Seq $values)
+    private function __construct(private Seq $original)
     {
-        $this->original = $values;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/ShortString.php b/src/Transport/Frame/Value/ShortString.php
index 4e60d34..407d9c2 100644
--- a/src/Transport/Frame/Value/ShortString.php
+++ b/src/Transport/Frame/Value/ShortString.php
@@ -17,11 +17,8 @@
  */
 final class ShortString implements Value
 {
-    private Str $original;
-
-    private function __construct(Str $string)
+    private function __construct(private Str $original)
     {
-        $this->original = $string;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/SignedLongInteger.php b/src/Transport/Frame/Value/SignedLongInteger.php
index 62e543a..91c894b 100644
--- a/src/Transport/Frame/Value/SignedLongInteger.php
+++ b/src/Transport/Frame/Value/SignedLongInteger.php
@@ -22,15 +22,11 @@
  */
 final class SignedLongInteger implements Value
 {
-    /** @var int<-2147483648, 2147483647> */
-    private int $original;
-
     /**
-     * @param int<-2147483648, 2147483647> $value
+     * @param int<-2147483648, 2147483647> $original
      */
-    private function __construct(int $value)
+    private function __construct(private int $original)
     {
-        $this->original = $value;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/SignedLongLongInteger.php b/src/Transport/Frame/Value/SignedLongLongInteger.php
index ced5057..83f79ba 100644
--- a/src/Transport/Frame/Value/SignedLongLongInteger.php
+++ b/src/Transport/Frame/Value/SignedLongLongInteger.php
@@ -17,11 +17,8 @@
  */
 final class SignedLongLongInteger implements Value
 {
-    private int $original;
-
-    private function __construct(int $value)
+    private function __construct(private int $original)
     {
-        $this->original = $value;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/SignedOctet.php b/src/Transport/Frame/Value/SignedOctet.php
index 3a53076..da4aa68 100644
--- a/src/Transport/Frame/Value/SignedOctet.php
+++ b/src/Transport/Frame/Value/SignedOctet.php
@@ -24,15 +24,11 @@
  */
 final class SignedOctet implements Value
 {
-    /** @var int<-128, 127> */
-    private int $original;
-
     /**
-     * @param int<-128, 127> $octet
+     * @param int<-128, 127> $original
      */
-    private function __construct(int $octet)
+    private function __construct(private int $original)
     {
-        $this->original = $octet;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/SignedShortInteger.php b/src/Transport/Frame/Value/SignedShortInteger.php
index 435ce86..308771b 100644
--- a/src/Transport/Frame/Value/SignedShortInteger.php
+++ b/src/Transport/Frame/Value/SignedShortInteger.php
@@ -22,15 +22,11 @@
  */
 final class SignedShortInteger implements Value
 {
-    /** @var int<-32768, 32767> */
-    private int $original;
-
     /**
-     * @param int<-32768, 32767> $value
+     * @param int<-32768, 32767> $original
      */
-    private function __construct(int $value)
+    private function __construct(private int $original)
     {
-        $this->original = $value;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/Table.php b/src/Transport/Frame/Value/Table.php
index 4a65536..4ad4de2 100644
--- a/src/Transport/Frame/Value/Table.php
+++ b/src/Transport/Frame/Value/Table.php
@@ -25,15 +25,11 @@
  */
 final class Table implements Value
 {
-    /** @var Map<string, Value> */
-    private Map $original;
-
     /**
-     * @param Map<string, Value> $map
+     * @param Map<string, Value> $original
      */
-    private function __construct(Map $map)
+    private function __construct(private Map $original)
     {
-        $this->original = $map;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/Timestamp.php b/src/Transport/Frame/Value/Timestamp.php
index 89ff54d..a018fe3 100644
--- a/src/Transport/Frame/Value/Timestamp.php
+++ b/src/Transport/Frame/Value/Timestamp.php
@@ -25,11 +25,8 @@
  */
 final class Timestamp implements Value
 {
-    private PointInTime $original;
-
-    private function __construct(PointInTime $point)
+    private function __construct(private PointInTime $original)
     {
-        $this->original = $point;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/Unpacked.php b/src/Transport/Frame/Value/Unpacked.php
index fe28b26..28ca182 100644
--- a/src/Transport/Frame/Value/Unpacked.php
+++ b/src/Transport/Frame/Value/Unpacked.php
@@ -12,26 +12,21 @@
  */
 final class Unpacked
 {
-    /** @var 0|positive-int */
-    private int $read;
-    /** @var T */
-    private Value $value;
-
     /**
-     * @param 0|positive-int $read
+     * @param int<0, max> $read
      * @param T $value
      */
-    private function __construct(int $read, Value $value)
-    {
-        $this->read = $read;
-        $this->value = $value;
+    private function __construct(
+        private int $read,
+        private Value $value,
+    ) {
     }
 
     /**
      * @psalm-pure
      * @template V of Value
      *
-     * @param 0|positive-int $read
+     * @param int<0, max> $read
      * @param V $value
      *
      * @return self<V>
@@ -42,7 +37,7 @@ public static function of(int $read, Value $value): self
     }
 
     /**
-     * @return 0|positive-int
+     * @return int<0, max>
      */
     public function read(): int
     {
diff --git a/src/Transport/Frame/Value/UnsignedLongInteger.php b/src/Transport/Frame/Value/UnsignedLongInteger.php
index e546346..9c327c4 100644
--- a/src/Transport/Frame/Value/UnsignedLongInteger.php
+++ b/src/Transport/Frame/Value/UnsignedLongInteger.php
@@ -22,15 +22,11 @@
  */
 final class UnsignedLongInteger implements Value
 {
-    /** @var int<0, 4294967295> */
-    private int $original;
-
     /**
-     * @param int<0, 4294967295> $value
+     * @param int<0, 4294967295> $original
      */
-    private function __construct(int $value)
+    private function __construct(private int $original)
     {
-        $this->original = $value;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/UnsignedLongLongInteger.php b/src/Transport/Frame/Value/UnsignedLongLongInteger.php
index 197337a..daf130b 100644
--- a/src/Transport/Frame/Value/UnsignedLongLongInteger.php
+++ b/src/Transport/Frame/Value/UnsignedLongLongInteger.php
@@ -23,15 +23,11 @@
  */
 final class UnsignedLongLongInteger implements Value
 {
-    /** @var int<0, max> */
-    private int $original;
-
     /**
-     * @param int<0, max> $value
+     * @param int<0, max> $original
      */
-    private function __construct(int $value)
+    private function __construct(private int $original)
     {
-        $this->original = $value;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/UnsignedOctet.php b/src/Transport/Frame/Value/UnsignedOctet.php
index 6c5e0aa..dd64ee2 100644
--- a/src/Transport/Frame/Value/UnsignedOctet.php
+++ b/src/Transport/Frame/Value/UnsignedOctet.php
@@ -24,15 +24,11 @@
  */
 final class UnsignedOctet implements Value
 {
-    /** @var int<0, 255> */
-    private int $original;
-
     /**
-     * @param int<0, 255> $octet
+     * @param int<0, 255> $original
      */
-    private function __construct(int $octet)
+    private function __construct(private int $original)
     {
-        $this->original = $octet;
     }
 
     /**
diff --git a/src/Transport/Frame/Value/UnsignedShortInteger.php b/src/Transport/Frame/Value/UnsignedShortInteger.php
index f64b0fa..5fdade1 100644
--- a/src/Transport/Frame/Value/UnsignedShortInteger.php
+++ b/src/Transport/Frame/Value/UnsignedShortInteger.php
@@ -22,15 +22,11 @@
  */
 final class UnsignedShortInteger implements Value
 {
-    /** @var int<0, 65535> */
-    private int $original;
-
     /**
-     * @param int<0, 65535> $value
+     * @param int<0, 65535> $original
      */
-    private function __construct(int $value)
+    private function __construct(private int $original)
     {
-        $this->original = $value;
     }
 
     /**
diff --git a/src/Transport/Protocol/Basic.php b/src/Transport/Protocol/Basic.php
index 43245ee..885a0b8 100644
--- a/src/Transport/Protocol/Basic.php
+++ b/src/Transport/Protocol/Basic.php
@@ -39,11 +39,8 @@
  */
 final class Basic
 {
-    private ArgumentTranslator $translate;
-
-    public function __construct(ArgumentTranslator $translator)
+    public function __construct(private ArgumentTranslator $translate)
     {
-        $this->translate = $translator;
     }
 
     /**
diff --git a/src/Transport/Protocol/Exchange.php b/src/Transport/Protocol/Exchange.php
index 8916851..a2d49f9 100644
--- a/src/Transport/Protocol/Exchange.php
+++ b/src/Transport/Protocol/Exchange.php
@@ -24,11 +24,8 @@
  */
 final class Exchange
 {
-    private ArgumentTranslator $translate;
-
-    public function __construct(ArgumentTranslator $translator)
+    public function __construct(private ArgumentTranslator $translate)
     {
-        $this->translate = $translator;
     }
 
     /**
diff --git a/src/Transport/Protocol/Queue.php b/src/Transport/Protocol/Queue.php
index 1f6edaf..544026e 100644
--- a/src/Transport/Protocol/Queue.php
+++ b/src/Transport/Protocol/Queue.php
@@ -28,11 +28,8 @@
  */
 final class Queue
 {
-    private ArgumentTranslator $translate;
-
-    public function __construct(ArgumentTranslator $translator)
+    public function __construct(private ArgumentTranslator $translate)
     {
-        $this->translate = $translator;
     }
 
     /**
diff --git a/src/Transport/ReceivedFrame.php b/src/Transport/ReceivedFrame.php
index 281d667..aa0f8f7 100644
--- a/src/Transport/ReceivedFrame.php
+++ b/src/Transport/ReceivedFrame.php
@@ -8,11 +8,8 @@
  */
 final class ReceivedFrame
 {
-    private Frame $frame;
-
-    private function __construct(Frame $frame)
+    private function __construct(private Frame $frame)
     {
-        $this->frame = $frame;
     }
 
     public static function of(Frame $frame): self