diff --git a/CHANGELOG.md b/CHANGELOG.md
index ef7f5cb..d2a2c98 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+4.1.0
+=====
+
+* (feature) `HostingEnvironment` now exposes the `%kernel.debug%` variable as `HostingEnvironment::isDebug()`.
+
+
 4.0.4
 =====
 
diff --git a/config/services.yaml b/config/services.yaml
index afed870..918b890 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -17,6 +17,7 @@ services:
     Torr\Hosting\Hosting\HostingEnvironment:
         $tier: !abstract defined via configuration
         $installationKey: !abstract defined via configuration
+        $isDebug: '%kernel.debug%'
 
     Torr\Hosting\BuildInfo\BuildInfoStorage:
         $filePath: '%kernel.project_dir%/.build-info.json'
diff --git a/src/Hosting/HostingEnvironment.php b/src/Hosting/HostingEnvironment.php
index a6f1a0e..90059f8 100644
--- a/src/Hosting/HostingEnvironment.php
+++ b/src/Hosting/HostingEnvironment.php
@@ -12,6 +12,7 @@
 	 */
 	public function __construct (
 		HostingTier|string $tier,
+		private bool $isDebug,
 		private ?string $installationKey = null,
 	)
 	{
@@ -54,4 +55,13 @@ public function getInstallationKey () : ?string
 	{
 		return $this->installationKey;
 	}
+
+	/**
+	 * Whether the Symfony debug mode is active. This is separate from the app environment (like `prod` or `dev`) and controls whether extensive debug information is collected.
+	 * This mode is controlled via the `APP_DEBUG` environment variable.
+	 */
+	public function isDebug () : bool
+	{
+		return $this->isDebug;
+	}
 }
diff --git a/tests/Hosting/HostingEnvironmentTest.php b/tests/Hosting/HostingEnvironmentTest.php
index 5bd4e46..2cf692c 100644
--- a/tests/Hosting/HostingEnvironmentTest.php
+++ b/tests/Hosting/HostingEnvironmentTest.php
@@ -15,7 +15,7 @@ final class HostingEnvironmentTest extends TestCase
 	 */
 	public function testInstallationKey () : void
 	{
-		$environment = new HostingEnvironment(HostingTier::PRODUCTION, "installation");
+		$environment = new HostingEnvironment(HostingTier::PRODUCTION, false, "installation");
 
 		self::assertSame("installation", $environment->getInstallationKey());
 	}
@@ -24,10 +24,10 @@ public function testInstallationKey () : void
 	 */
 	public function testHostingTierConstructor () : void
 	{
-		$environment = new HostingEnvironment(HostingTier::PRODUCTION, "installation");
+		$environment = new HostingEnvironment(HostingTier::PRODUCTION, false, "installation");
 		self::assertSame(HostingTier::PRODUCTION, $environment->getTier());
 
-		$environment2 = new HostingEnvironment("staging", "installation");
+		$environment2 = new HostingEnvironment("staging", false, "installation");
 		self::assertSame(HostingTier::STAGING, $environment2->getTier());
 	}
 
@@ -49,7 +49,16 @@ public static function provideHostingTiers () : iterable
 	 */
 	public function testHostingTiers (string|HostingTier $value, HostingTier $expected) : void
 	{
-		$environment = new HostingEnvironment($value, "installation");
+		$environment = new HostingEnvironment($value, false, "installation");
 		self::assertSame($expected, $environment->getTier());
 	}
+
+	public function testDebugFlag () : void
+	{
+		$environment = new HostingEnvironment(HostingTier::DEVELOPMENT, false, "installation");
+		self::assertFalse($environment->isDebug());
+
+		$environment2 = new HostingEnvironment(HostingTier::PRODUCTION, true, "other-installation");
+		self::assertTrue($environment2->isDebug());
+	}
 }