diff --git a/psalm.xml b/psalm.xml
index 78df975..a2dbf3d 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -17,4 +17,7 @@
     <disableExtensions>
         <extension name="random" />
     </disableExtensions>
+    <issueHandlers>
+        <UndefinedAttributeClass errorLevel="suppress" />
+    </issueHandlers>
 </psalm>
diff --git a/src/Files.php b/src/Files.php
index 9e6dbf6..8392716 100644
--- a/src/Files.php
+++ b/src/Files.php
@@ -31,16 +31,19 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(Capabilities $capabilities): self
     {
         return new self($capabilities);
     }
 
+    #[\NoDiscard]
     public function read(Path $path): Read
     {
         return Read::of($this->capabilities, $path);
     }
 
+    #[\NoDiscard]
     public function write(Path $path): Write
     {
         return Write::of($this->capabilities, $path);
@@ -49,6 +52,7 @@ public function write(Path $path): Write
     /**
      * @return Maybe<mixed>
      */
+    #[\NoDiscard]
     public function require(Path $path): Maybe
     {
         return $this->capabilities->files()->require($path);
@@ -59,6 +63,7 @@ public function require(Path $path): Maybe
      *
      * @return Attempt<Temporary>
      */
+    #[\NoDiscard]
     public function temporary(Sequence $chunks): Attempt
     {
         $capabilities = $this->capabilities;
@@ -77,6 +82,7 @@ public function temporary(Sequence $chunks): Attempt
     /**
      * @return Attempt<File|Directory|Link>
      */
+    #[\NoDiscard]
     public function access(Path $path): Attempt
     {
         return $this
@@ -93,6 +99,7 @@ public function access(Path $path): Attempt
     /**
      * @return Attempt<File|Directory>
      */
+    #[\NoDiscard]
     public function create(Path $path): Attempt
     {
         return $this
@@ -105,6 +112,7 @@ public function create(Path $path): Attempt
             });
     }
 
+    #[\NoDiscard]
     public function exists(Path $path): bool
     {
         return $this->capabilities->files()->exists($path);
diff --git a/src/Files/Directory.php b/src/Files/Directory.php
index 2dc8d80..b675b44 100644
--- a/src/Files/Directory.php
+++ b/src/Files/Directory.php
@@ -22,6 +22,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(
         Capabilities $capabilities,
         Path $path,
@@ -36,6 +37,7 @@ public static function of(
     /**
      * @return Sequence<Name>
      */
+    #[\NoDiscard]
     public function list(): Sequence
     {
         return $this
@@ -47,6 +49,7 @@ public function list(): Sequence
     /**
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function remove(): Attempt
     {
         return $this
diff --git a/src/Files/File.php b/src/Files/File.php
index 686bcfb..d71e8e5 100644
--- a/src/Files/File.php
+++ b/src/Files/File.php
@@ -21,6 +21,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(
         Capabilities $capabilities,
         Path $path,
@@ -28,11 +29,13 @@ public static function of(
         return new self($capabilities, $path);
     }
 
+    #[\NoDiscard]
     public function read(): Read
     {
         return Read::of($this->capabilities, $this->path);
     }
 
+    #[\NoDiscard]
     public function write(): Write
     {
         return Write::of($this->capabilities, $this->path);
@@ -41,6 +44,7 @@ public function write(): Write
     /**
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function remove(): Attempt
     {
         return $this
@@ -52,6 +56,7 @@ public function remove(): Attempt
     /**
      * @return Attempt<string>
      */
+    #[\NoDiscard]
     public function mediaType(): Attempt
     {
         return $this
diff --git a/src/Files/Name.php b/src/Files/Name.php
index 3188840..9a00a51 100644
--- a/src/Files/Name.php
+++ b/src/Files/Name.php
@@ -22,11 +22,13 @@ private function __construct(
      *
      * @param non-empty-string $name
      */
+    #[\NoDiscard]
     public static function of(string $name, Kind $kind): self
     {
         return new self($name, $kind);
     }
 
+    #[\NoDiscard]
     public function kind(): Kind
     {
         return $this->kind;
@@ -35,6 +37,7 @@ public function kind(): Kind
     /**
      * @return non-empty-string
      */
+    #[\NoDiscard]
     public function toString(): string
     {
         return $this->name;
diff --git a/src/Files/Read.php b/src/Files/Read.php
index 9182811..948271d 100644
--- a/src/Files/Read.php
+++ b/src/Files/Read.php
@@ -34,6 +34,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(
         Capabilities $capabilities,
         Path $path,
@@ -55,6 +56,7 @@ public static function of(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function temporary(
         Capabilities $capabilities,
         Internal\Stream $stream,
@@ -73,6 +75,7 @@ public static function temporary(
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function toEncoding(Str\Encoding $encoding): self
     {
         return new self(
@@ -91,6 +94,7 @@ public function toEncoding(Str\Encoding $encoding): self
      *
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function watch(): self
     {
         return new self(
@@ -104,6 +108,7 @@ public function watch(): self
     /**
      * @return Maybe<Size>
      */
+    #[\NoDiscard]
     public function size(): Maybe
     {
         return ($this->load)()->size();
@@ -114,6 +119,7 @@ public function size(): Maybe
      *
      * @return Sequence<Str>
      */
+    #[\NoDiscard]
     public function chunks(int $size): Sequence
     {
         $load = $this->load;
@@ -167,6 +173,7 @@ public function chunks(int $size): Sequence
     /**
      * @return Sequence<Str>
      */
+    #[\NoDiscard]
     public function lines(): Sequence
     {
         $load = $this->load;
diff --git a/src/Files/Temporary.php b/src/Files/Temporary.php
index a687ff7..31a94d3 100644
--- a/src/Files/Temporary.php
+++ b/src/Files/Temporary.php
@@ -25,6 +25,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(
         Capabilities $capabilities,
         Internal\Stream $stream,
@@ -38,11 +39,13 @@ public static function of(
      *
      * @internal
      */
+    #[\NoDiscard]
     public function internal(): Internal\Stream
     {
         return $this->stream;
     }
 
+    #[\NoDiscard]
     public function read(): Read
     {
         return Read::temporary($this->capabilities, $this->stream);
@@ -51,6 +54,7 @@ public function read(): Read
     /**
      * @return Attempt<Pull>
      */
+    #[\NoDiscard]
     public function pull(): Attempt
     {
         return $this->stream->rewind()->map(
@@ -58,6 +62,7 @@ public function pull(): Attempt
         );
     }
 
+    #[\NoDiscard]
     public function push(): Push
     {
         return Push::of($this->capabilities, $this->stream);
@@ -66,6 +71,7 @@ public function push(): Push
     /**
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function close(): Attempt
     {
         return $this->stream->close();
diff --git a/src/Files/Temporary/Pull.php b/src/Files/Temporary/Pull.php
index 6be53db..27573af 100644
--- a/src/Files/Temporary/Pull.php
+++ b/src/Files/Temporary/Pull.php
@@ -30,6 +30,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(
         Capabilities $capabilities,
         Internal\Stream $stream,
@@ -47,6 +48,7 @@ public static function of(
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function toEncoding(Str\Encoding $encoding): self
     {
         return new self(
@@ -64,6 +66,7 @@ public function toEncoding(Str\Encoding $encoding): self
      *
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function watch(): self
     {
         return new self(
@@ -76,6 +79,7 @@ public function watch(): self
     /**
      * @return Maybe<Size>
      */
+    #[\NoDiscard]
     public function size(): Maybe
     {
         return $this->stream->size();
@@ -86,6 +90,7 @@ public function size(): Maybe
      *
      * @return Attempt<Str>
      */
+    #[\NoDiscard]
     public function chunk(int $size): Attempt
     {
         $stream = $this->stream;
diff --git a/src/Files/Temporary/Push.php b/src/Files/Temporary/Push.php
index 16235b2..5934e6a 100644
--- a/src/Files/Temporary/Push.php
+++ b/src/Files/Temporary/Push.php
@@ -25,6 +25,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(
         Capabilities $capabilities,
         Internal\Stream $stream,
@@ -43,6 +44,7 @@ public static function of(
      *
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function watch(): self
     {
         return new self(
@@ -54,6 +56,7 @@ public function watch(): self
     /**
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function chunk(Str $chunk): Attempt
     {
         $stream = $this->stream;
diff --git a/src/Files/Write.php b/src/Files/Write.php
index d4cda91..65893e8 100644
--- a/src/Files/Write.php
+++ b/src/Files/Write.php
@@ -35,6 +35,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(Capabilities $capabilities, Path $path): self
     {
         return new self(
@@ -51,6 +52,7 @@ public static function of(Capabilities $capabilities, Path $path): self
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function temporary(
         Capabilities $capabilities,
         Internal\Stream $stream,
@@ -71,6 +73,7 @@ public static function temporary(
      *
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function watch(): self
     {
         return new self(
@@ -86,6 +89,7 @@ public function watch(): self
      *
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function sink(Sequence $chunks): Attempt
     {
         $stream = ($this->load)();
diff --git a/src/Frame.php b/src/Frame.php
index 15cb6b9..1371c04 100644
--- a/src/Frame.php
+++ b/src/Frame.php
@@ -51,6 +51,7 @@ public function __invoke(Reader|Reader\Buffer $reader): Attempt
      *
      * @return self<U>
      */
+    #[\NoDiscard]
     public static function just(mixed $value): self
     {
         return new self(M::just($value));
@@ -64,6 +65,7 @@ public static function just(mixed $value): self
      *
      * @return self<U>
      */
+    #[\NoDiscard]
     public static function maybe(Maybe $value): self
     {
         return new self(M::of($value));
@@ -74,6 +76,7 @@ public static function maybe(Maybe $value): self
      *
      * @param int<1, max> $size
      */
+    #[\NoDiscard]
     public static function chunk(int $size): Frame\Provider\Chunk
     {
         return Frame\Provider\Chunk::of(
@@ -87,6 +90,7 @@ public static function chunk(int $size): Frame\Provider\Chunk
      *
      * @return self<Str>
      */
+    #[\NoDiscard]
     public static function line(): self
     {
         return new self(Line::new());
@@ -100,6 +104,7 @@ public static function line(): self
      *
      * @return self<A>
      */
+    #[\NoDiscard]
     public static function compose(
         callable $map,
         self $first,
@@ -127,6 +132,7 @@ public static function compose(
      *
      * @return self<Seq<Attempt<U>>>
      */
+    #[\NoDiscard]
     public static function sequence(self $frame): self
     {
         return new self(Sequence::of($frame));
@@ -149,6 +155,7 @@ public static function sequence(self $frame): self
      *
      * @return self<U>
      */
+    #[\NoDiscard]
     public static function buffer(int $size, self $frame): self
     {
         /** @psalm-suppress ImpurePropertyFetch It's safe to access the implementation */
@@ -162,6 +169,7 @@ public static function buffer(int $size, self $frame): self
      *
      * @return self<T>
      */
+    #[\NoDiscard]
     public function filter(callable $predicate): self
     {
         return new self(Frame\Filter::of(
@@ -179,6 +187,7 @@ public function filter(callable $predicate): self
      *
      * @return self<U>
      */
+    #[\NoDiscard]
     public function map(callable $map): self
     {
         return new self(Frame\Map::of(
@@ -196,6 +205,7 @@ public function map(callable $map): self
      *
      * @return self<U>
      */
+    #[\NoDiscard]
     public function flatMap(callable $map): self
     {
         return new self(Frame\FlatMap::of(
diff --git a/src/Frame/Provider/Chunk.php b/src/Frame/Provider/Chunk.php
index c43ad87..b09ace5 100644
--- a/src/Frame/Provider/Chunk.php
+++ b/src/Frame/Provider/Chunk.php
@@ -43,6 +43,7 @@ public static function of(
      *
      * @return Frame<Str>
      */
+    #[\NoDiscard]
     public function strict(): Frame
     {
         $size = $this->size;
@@ -57,6 +58,7 @@ public function strict(): Frame
      *
      * @return Frame<Str>
      */
+    #[\NoDiscard]
     public function loose(): Frame
     {
         /** @var Frame<Str> */
diff --git a/src/IO.php b/src/IO.php
index 84b6271..e9825b5 100644
--- a/src/IO.php
+++ b/src/IO.php
@@ -13,6 +13,7 @@ private function __construct(
     ) {
     }
 
+    #[\NoDiscard]
     public static function fromAmbientAuthority(): self
     {
         return new self(Capabilities::fromAmbientAuthority());
@@ -23,6 +24,7 @@ public static function fromAmbientAuthority(): self
      *
      * @internal
      */
+    #[\NoDiscard]
     public static function async(self $io, Clock $clock): self
     {
         return new self(Capabilities::async(
@@ -36,6 +38,7 @@ public static function async(self $io, Clock $clock): self
      *
      * @internal
      */
+    #[\NoDiscard]
     public static function simulation(
         self $io,
         Simulation\Disk $disk,
@@ -46,16 +49,19 @@ public static function simulation(
         ));
     }
 
+    #[\NoDiscard]
     public function files(): Files
     {
         return Files::of($this->capabilities);
     }
 
+    #[\NoDiscard]
     public function streams(): Streams
     {
         return Streams::of($this->capabilities);
     }
 
+    #[\NoDiscard]
     public function sockets(): Sockets
     {
         return Sockets::of($this->capabilities);
diff --git a/src/Sockets.php b/src/Sockets.php
index 50e2ba3..f0d65a5 100644
--- a/src/Sockets.php
+++ b/src/Sockets.php
@@ -21,17 +21,20 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(
         Capabilities $capabilities,
     ): self {
         return new self($capabilities);
     }
 
+    #[\NoDiscard]
     public function clients(): Clients
     {
         return Clients::of($this->capabilities);
     }
 
+    #[\NoDiscard]
     public function servers(): Servers
     {
         return Servers::of($this->capabilities);
@@ -40,6 +43,7 @@ public function servers(): Servers
     /**
      * @return Attempt<array{Client, Client}>
      */
+    #[\NoDiscard]
     public function pair(): Attempt
     {
         return $this->capabilities->sockets()->pair()->map(
diff --git a/src/Sockets/Clients.php b/src/Sockets/Clients.php
index e1b5cb7..1fb3e71 100644
--- a/src/Sockets/Clients.php
+++ b/src/Sockets/Clients.php
@@ -23,6 +23,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(
         Capabilities $capabilities,
     ): self {
@@ -32,6 +33,7 @@ public static function of(
     /**
      * @return Attempt<Client>
      */
+    #[\NoDiscard]
     public function internet(Transport $transport, Authority $authority): Attempt
     {
         return $this
@@ -50,6 +52,7 @@ public function internet(Transport $transport, Authority $authority): Attempt
     /**
      * @return Attempt<Client>
      */
+    #[\NoDiscard]
     public function unix(Address $address): Attempt
     {
         return $this
diff --git a/src/Sockets/Clients/Client.php b/src/Sockets/Clients/Client.php
index 9c893d7..a660732 100644
--- a/src/Sockets/Clients/Client.php
+++ b/src/Sockets/Clients/Client.php
@@ -28,6 +28,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(Stream $stream): self
     {
         return new self(
@@ -40,6 +41,7 @@ public static function of(Stream $stream): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function toEncoding(Str\Encoding $encoding): self
     {
         return new self(
@@ -52,6 +54,7 @@ public function toEncoding(Str\Encoding $encoding): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function watch(): self
     {
         return new self(
@@ -64,6 +67,7 @@ public function watch(): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function timeoutAfter(Period $period): self
     {
         return new self(
@@ -76,6 +80,7 @@ public function timeoutAfter(Period $period): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function poll(): self
     {
         return $this->timeoutAfter(Period::second(0));
@@ -93,6 +98,7 @@ public function poll(): self
      *
      * @param callable(): Sequence<Str> $chunks
      */
+    #[\NoDiscard]
     public function heartbeatWith(callable $chunks): self
     {
         return new self(
@@ -116,6 +122,7 @@ public function heartbeatWith(callable $chunks): self
      *
      * @param callable(): bool $abort
      */
+    #[\NoDiscard]
     public function abortWhen(callable $abort): self
     {
         return new self(
@@ -130,6 +137,7 @@ public function abortWhen(callable $abort): self
      *
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function sink(Sequence $chunks): Attempt
     {
         return $this->write->sink($chunks);
@@ -140,6 +148,7 @@ public function sink(Sequence $chunks): Attempt
      *
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function sinkAttempts(Sequence $chunks): Attempt
     {
         return $this->write->sinkAttempts($chunks);
@@ -152,6 +161,7 @@ public function sinkAttempts(Sequence $chunks): Attempt
      *
      * @return Frames<T>
      */
+    #[\NoDiscard]
     public function frames(Frame $frame): Frames
     {
         return Frames::of($this->read->frames($frame));
@@ -160,6 +170,7 @@ public function frames(Frame $frame): Frames
     /**
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function close(): Attempt
     {
         return $this->stream->close();
diff --git a/src/Sockets/Clients/Client/Frames.php b/src/Sockets/Clients/Client/Frames.php
index 6ba00ed..26dc765 100644
--- a/src/Sockets/Clients/Client/Frames.php
+++ b/src/Sockets/Clients/Client/Frames.php
@@ -30,6 +30,7 @@ private function __construct(
      *
      * @return self<A>
      */
+    #[\NoDiscard]
     public static function of(Stream $frames): self
     {
         return new self($frames);
@@ -38,6 +39,7 @@ public static function of(Stream $frames): self
     /**
      * @return Attempt<T>
      */
+    #[\NoDiscard]
     public function one(): Attempt
     {
         return $this->frames->one();
@@ -46,6 +48,7 @@ public function one(): Attempt
     /**
      * @return Lazy<T>
      */
+    #[\NoDiscard]
     public function lazy(): Lazy
     {
         return Lazy::of($this->frames->lazy());
diff --git a/src/Sockets/Clients/Client/Frames/Lazy.php b/src/Sockets/Clients/Client/Frames/Lazy.php
index 32a4ff3..42bbd7c 100644
--- a/src/Sockets/Clients/Client/Frames/Lazy.php
+++ b/src/Sockets/Clients/Client/Frames/Lazy.php
@@ -27,6 +27,7 @@ private function __construct(
      *
      * @return self<A>
      */
+    #[\NoDiscard]
     public static function of(Stream $frames): self
     {
         return new self($frames);
@@ -35,6 +36,7 @@ public static function of(Stream $frames): self
     /**
      * @return Sequence<T>
      */
+    #[\NoDiscard]
     public function sequence(): Sequence
     {
         return $this->frames->sequence();
diff --git a/src/Sockets/Internet/Transport.php b/src/Sockets/Internet/Transport.php
index e9639df..4b8ae81 100644
--- a/src/Sockets/Internet/Transport.php
+++ b/src/Sockets/Internet/Transport.php
@@ -25,41 +25,49 @@ private function __construct(string $transport)
         $this->options = Map::of();
     }
 
+    #[\NoDiscard]
     public static function tcp(): self
     {
         return new self('tcp');
     }
 
+    #[\NoDiscard]
     public static function ssl(): self
     {
         return new self('ssl');
     }
 
+    #[\NoDiscard]
     public static function sslv3(): self
     {
         return new self('sslv3');
     }
 
+    #[\NoDiscard]
     public static function sslv2(): self
     {
         return new self('sslv2');
     }
 
+    #[\NoDiscard]
     public static function tls(): self
     {
         return new self('tls');
     }
 
+    #[\NoDiscard]
     public static function tlsv10(): self
     {
         return new self('tlsv1.0');
     }
 
+    #[\NoDiscard]
     public static function tlsv11(): self
     {
         return new self('tlsv1.1');
     }
 
+    #[\NoDiscard]
     public static function tlsv12(): self
     {
         return new self('tlsv1.2');
@@ -68,6 +76,7 @@ public static function tlsv12(): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function withOption(string $key, int|bool|float|string|array $value): self
     {
         $self = clone $this;
@@ -79,11 +88,13 @@ public function withOption(string $key, int|bool|float|string|array $value): sel
     /**
      * @return Map<string, int|bool|float|string|array>
      */
+    #[\NoDiscard]
     public function options(): Map
     {
         return $this->options;
     }
 
+    #[\NoDiscard]
     public function toString(): string
     {
         return $this->transport;
diff --git a/src/Sockets/Servers.php b/src/Sockets/Servers.php
index 0dbb574..5b56ac7 100644
--- a/src/Sockets/Servers.php
+++ b/src/Sockets/Servers.php
@@ -23,6 +23,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(Capabilities $capabilities): self
     {
         return new self($capabilities);
@@ -31,6 +32,7 @@ public static function of(Capabilities $capabilities): self
     /**
      * @return Attempt<Server>
      */
+    #[\NoDiscard]
     public function internet(Transport $transport, IP $ip, Port $port): Attempt
     {
         return $this
@@ -48,6 +50,7 @@ public function internet(Transport $transport, IP $ip, Port $port): Attempt
     /**
      * @return Attempt<Server>
      */
+    #[\NoDiscard]
     public function unix(Address $address): Attempt
     {
         return $this
@@ -65,6 +68,7 @@ public function unix(Address $address): Attempt
     /**
      * @return Attempt<Server>
      */
+    #[\NoDiscard]
     public function takeOver(Address $address): Attempt
     {
         return $this
diff --git a/src/Sockets/Servers/Server.php b/src/Sockets/Servers/Server.php
index b7a2e1d..22cb0d5 100644
--- a/src/Sockets/Servers/Server.php
+++ b/src/Sockets/Servers/Server.php
@@ -31,6 +31,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(
         Capabilities $capabilities,
         Watch $watch,
@@ -42,6 +43,7 @@ public static function of(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public function unwrap(): Watch
     {
         return $this->watch;
@@ -50,6 +52,7 @@ public function unwrap(): Watch
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function watch(): self
     {
         return new self(
@@ -62,6 +65,7 @@ public function watch(): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function timeoutAfter(Period $period): self
     {
         return new self(
@@ -74,6 +78,7 @@ public function timeoutAfter(Period $period): self
     /**
      * @return Attempt<Client>
      */
+    #[\NoDiscard]
     public function accept(): Attempt
     {
         $socket = $this->socket;
@@ -97,6 +102,7 @@ public function accept(): Attempt
             ));
     }
 
+    #[\NoDiscard]
     public function pool(self $server): Pool
     {
         return Pool::of($this->capabilities, $this->watch->forRead(
@@ -107,6 +113,7 @@ public function pool(self $server): Pool
     /**
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function close(): Attempt
     {
         return $this->socket->close();
diff --git a/src/Sockets/Servers/Server/Pool.php b/src/Sockets/Servers/Server/Pool.php
index 8e8dc09..726d87e 100644
--- a/src/Sockets/Servers/Server/Pool.php
+++ b/src/Sockets/Servers/Server/Pool.php
@@ -27,6 +27,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(Capabilities $capabilities, Watch $watch): self
     {
         return new self($capabilities, $watch);
@@ -35,6 +36,7 @@ public static function of(Capabilities $capabilities, Watch $watch): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function with(Server $server): self
     {
         return new self(
@@ -46,6 +48,7 @@ public function with(Server $server): self
     /**
      * @return Sequence<Client>
      */
+    #[\NoDiscard]
     public function accept(): Sequence
     {
         return ($this->watch)()
diff --git a/src/Sockets/Unix/Address.php b/src/Sockets/Unix/Address.php
index a1df135..20ae059 100644
--- a/src/Sockets/Unix/Address.php
+++ b/src/Sockets/Unix/Address.php
@@ -17,11 +17,13 @@ private function __construct(private Path $path)
     /**
      * @psalm-pure
      */
+    #[\NoDiscard]
     public static function of(Path $path): self
     {
         return new self($path);
     }
 
+    #[\NoDiscard]
     public function toString(): string
     {
         /** @var array{dirname: string, filename: string} */
diff --git a/src/Stream/Size.php b/src/Stream/Size.php
index 9b9f80f..6ef5dcc 100644
--- a/src/Stream/Size.php
+++ b/src/Stream/Size.php
@@ -19,11 +19,13 @@ private function __construct(
      *
      * @param int<0, max> $value
      */
+    #[\NoDiscard]
     public static function of(int $value): self
     {
         return new self($value);
     }
 
+    #[\NoDiscard]
     public function lessThan(self $size): bool
     {
         return $this->value < $size->value;
@@ -32,16 +34,19 @@ public function lessThan(self $size): bool
     /**
      * @return int<0, max>
      */
+    #[\NoDiscard]
     public function toInt(): int
     {
         return $this->value;
     }
 
+    #[\NoDiscard]
     public function unit(): Size\Unit
     {
         return Size\Unit::for($this->value);
     }
 
+    #[\NoDiscard]
     public function toString(): string
     {
         return Size\Unit::format($this->value);
diff --git a/src/Stream/Size/Unit.php b/src/Stream/Size/Unit.php
index e3b4b07..3d17850 100644
--- a/src/Stream/Size/Unit.php
+++ b/src/Stream/Size/Unit.php
@@ -22,6 +22,7 @@ enum Unit
      *
      * @param int<0, max> $size
      */
+    #[\NoDiscard]
     public static function for(int $size): self
     {
         if ($size < 1024) {
@@ -52,6 +53,7 @@ public static function for(int $size): self
      *
      * @param int<0, max> $size
      */
+    #[\NoDiscard]
     public static function format(int $size): string
     {
         $unit = self::for($size);
@@ -71,6 +73,7 @@ public static function format(int $size): string
      *
      * @return int<0, max>
      */
+    #[\NoDiscard]
     public function times(int $value): int
     {
         return match ($this) {
@@ -82,6 +85,7 @@ public function times(int $value): int
     /**
      * @param int<0, max> $value
      */
+    #[\NoDiscard]
     public function of(int $value): Size
     {
         return Size::of($this->times($value));
diff --git a/src/Streams.php b/src/Streams.php
index 9c118cc..6295176 100644
--- a/src/Streams.php
+++ b/src/Streams.php
@@ -18,6 +18,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(Capabilities $capabilities): self
     {
         return new self($capabilities);
@@ -26,6 +27,7 @@ public static function of(Capabilities $capabilities): self
     /**
      * @param resource $resource
      */
+    #[\NoDiscard]
     public function acquire($resource): Stream
     {
         return Stream::of(
diff --git a/src/Streams/Stream.php b/src/Streams/Stream.php
index f3393ab..3573593 100644
--- a/src/Streams/Stream.php
+++ b/src/Streams/Stream.php
@@ -25,6 +25,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(
         Capabilities $capabilities,
         Internal\Stream $stream,
@@ -32,6 +33,7 @@ public static function of(
         return new self($capabilities, $stream);
     }
 
+    #[\NoDiscard]
     public function read(): Read
     {
         return Read::of(
@@ -41,6 +43,7 @@ public function read(): Read
         );
     }
 
+    #[\NoDiscard]
     public function write(): Write
     {
         return Write::of($this->capabilities->watch(), $this->stream);
@@ -49,6 +52,7 @@ public function write(): Write
     /**
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function close(): Attempt
     {
         return $this->stream->close();
diff --git a/src/Streams/Stream/Read.php b/src/Streams/Stream/Read.php
index 00b2c01..5c61013 100644
--- a/src/Streams/Stream/Read.php
+++ b/src/Streams/Stream/Read.php
@@ -40,6 +40,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(
         Write $write,
         Capabilities $capabilities,
@@ -65,6 +66,7 @@ public static function of(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public function internal(): Stream
     {
         return $this->stream;
@@ -78,6 +80,7 @@ public function internal(): Stream
      *
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function nonBlocking(): self
     {
         return new self(
@@ -95,6 +98,7 @@ public function nonBlocking(): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function toEncoding(Str\Encoding $encoding): self
     {
         return new self(
@@ -112,6 +116,7 @@ public function toEncoding(Str\Encoding $encoding): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function watch(): self
     {
         return new self(
@@ -129,6 +134,7 @@ public function watch(): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function timeoutAfter(Period $period): self
     {
         return new self(
@@ -146,6 +152,7 @@ public function timeoutAfter(Period $period): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function poll(): self
     {
         return $this->timeoutAfter(Period::second(0));
@@ -163,6 +170,7 @@ public function poll(): self
      *
      * @param callable(): Sequence<Str> $provide
      */
+    #[\NoDiscard]
     public function heartbeatWith(callable $provide): self
     {
         return new self(
@@ -190,6 +198,7 @@ public function heartbeatWith(callable $provide): self
      *
      * @param callable(): bool $abort
      */
+    #[\NoDiscard]
     public function abortWhen(callable $abort): self
     {
         return new self(
@@ -211,6 +220,7 @@ public function abortWhen(callable $abort): self
      *
      * @return Pool<T>
      */
+    #[\NoDiscard]
     public function pool(mixed $id): Pool
     {
         return Pool::of(
@@ -227,6 +237,7 @@ public function pool(mixed $id): Pool
      *
      * @return Frames<T>
      */
+    #[\NoDiscard]
     public function frames(Frame $frame): Frames
     {
         return Frames::of(
diff --git a/src/Streams/Stream/Read/Frames.php b/src/Streams/Stream/Read/Frames.php
index 3886b60..f3b0fcf 100644
--- a/src/Streams/Stream/Read/Frames.php
+++ b/src/Streams/Stream/Read/Frames.php
@@ -53,6 +53,7 @@ private function __construct(
      *
      * @return self<A>
      */
+    #[\NoDiscard]
     public static function of(
         Write $write,
         Stream $stream,
@@ -78,6 +79,7 @@ public static function of(
     /**
      * @return Attempt<T>
      */
+    #[\NoDiscard]
     public function one(): Attempt
     {
         $stream = $this->stream;
@@ -113,6 +115,7 @@ public function one(): Attempt
     /**
      * @return Lazy<T>
      */
+    #[\NoDiscard]
     public function lazy(): Lazy
     {
         return Lazy::of(
diff --git a/src/Streams/Stream/Read/Frames/Lazy.php b/src/Streams/Stream/Read/Frames/Lazy.php
index 24d75b8..8c267a1 100644
--- a/src/Streams/Stream/Read/Frames/Lazy.php
+++ b/src/Streams/Stream/Read/Frames/Lazy.php
@@ -51,6 +51,7 @@ private function __construct(
      *
      * @return self<A>
      */
+    #[\NoDiscard]
     public static function of(
         Write $write,
         Stream $stream,
@@ -79,6 +80,7 @@ public static function of(
      *
      * @return self<T>
      */
+    #[\NoDiscard]
     public function rewindable(): self
     {
         return new self(
@@ -97,6 +99,7 @@ public function rewindable(): self
     /**
      * @return Sequence<T>
      */
+    #[\NoDiscard]
     public function sequence(): Sequence
     {
         $write = $this->write;
diff --git a/src/Streams/Stream/Read/Pool.php b/src/Streams/Stream/Read/Pool.php
index baddd0c..7825f53 100644
--- a/src/Streams/Stream/Read/Pool.php
+++ b/src/Streams/Stream/Read/Pool.php
@@ -42,6 +42,7 @@ private function __construct(
      *
      * @return self<A>
      */
+    #[\NoDiscard]
     public static function of(
         Capabilities $capabilities,
         Read $stream,
@@ -63,6 +64,7 @@ public static function of(
      *
      * @return self<T|U>
      */
+    #[\NoDiscard]
     public function with(mixed $id, Read $stream): self
     {
         /** @psalm-suppress InvalidArgument Due to the id union */
@@ -78,6 +80,7 @@ public function with(mixed $id, Read $stream): self
     /**
      * @return self<T>
      */
+    #[\NoDiscard]
     public function poll(): self
     {
         return $this->timeoutAfter(Period::second(0));
@@ -86,6 +89,7 @@ public function poll(): self
     /**
      * @return self<T>
      */
+    #[\NoDiscard]
     public function watch(): self
     {
         return new self(
@@ -100,6 +104,7 @@ public function watch(): self
     /**
      * @return self<T>
      */
+    #[\NoDiscard]
     public function timeoutAfter(Period $timeout): self
     {
         return new self(
@@ -114,6 +119,7 @@ public function timeoutAfter(Period $timeout): self
     /**
      * @return self<T>
      */
+    #[\NoDiscard]
     public function toEncoding(Str\Encoding $encoding): self
     {
         return new self(
@@ -128,6 +134,7 @@ public function toEncoding(Str\Encoding $encoding): self
     /**
      * @return self<T>
      */
+    #[\NoDiscard]
     public function nonBlocking(): self
     {
         return new self(
@@ -142,6 +149,7 @@ public function nonBlocking(): self
     /**
      * @return Sequence<Pair<T, Str>>
      */
+    #[\NoDiscard]
     public function chunks(): Sequence
     {
         $blocking = $this->blocking;
diff --git a/src/Streams/Stream/Write.php b/src/Streams/Stream/Write.php
index 9a60839..9643e72 100644
--- a/src/Streams/Stream/Write.php
+++ b/src/Streams/Stream/Write.php
@@ -32,6 +32,7 @@ private function __construct(
     /**
      * @internal
      */
+    #[\NoDiscard]
     public static function of(Watch $watch, Stream $stream): self
     {
         return new self(
@@ -52,6 +53,7 @@ public static function of(Watch $watch, Stream $stream): self
      *
      * @param callable(): bool $abort
      */
+    #[\NoDiscard]
     public function abortWhen(callable $abort): self
     {
         return new self(
@@ -65,6 +67,7 @@ public function abortWhen(callable $abort): self
     /**
      * @psalm-mutation-free
      */
+    #[\NoDiscard]
     public function watch(): self
     {
         return new self(
@@ -80,6 +83,7 @@ public function watch(): self
      *
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function sink(Sequence $chunks): Attempt
     {
         return $this->sinkAttempts(
@@ -92,6 +96,7 @@ public function sink(Sequence $chunks): Attempt
      *
      * @return Attempt<SideEffect>
      */
+    #[\NoDiscard]
     public function sinkAttempts(Sequence $chunks): Attempt
     {
         $stream = $this->stream;