Add a WithMonologChannel attribute

src/Monolog/Attribute/WithMonologChannel.php

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+<?php declare(strict_types=1);
+
+/*
+ * This file is part of the Monolog package.
+ *
+ * (c) Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Monolog\Attribute;
+
+/**
+ * A reusable attribute to help configure a class as expecting a given logger channel.
+ *
+ * Using it offers no guarantee: it needs to be leveraged by a Monolog third-party consumer.
+ *
+ * Using it with the Monolog library only has no effect at all: wiring the logger instance into
+ * other classes is not managed by Monolog.
+ */
+#[\Attribute(\Attribute::TARGET_CLASS)]
+final class WithMonologChannel
+{
+    public function __construct(
+        public readonly string $channel
+    ) {
+    }
+}

tests/Monolog/Attribute/WithMonologChannelTest.php

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+<?php
+
+namespace Monolog\Attribute;
+
+use PHPUnit\Framework\TestCase;
+
+class WithMonologChannelTest extends TestCase
+{
+    public function test(): void
+    {
+        $attribute = new WithMonologChannel('fixture');
+        $this->assertSame('fixture', $attribute->channel);
+    }
+
+}