diff --git a/src/Integrations/Divi/Design/DiviFontsUploadAbility.php b/src/Integrations/Divi/Design/DiviFontsUploadAbility.php
index 15fbdb4..0afd34c 100644
--- a/src/Integrations/Divi/Design/DiviFontsUploadAbility.php
+++ b/src/Integrations/Divi/Design/DiviFontsUploadAbility.php
@@ -12,6 +12,7 @@ use LIT\MCP\Abilities\ToolResult;
 use LIT\MCP\Abilities\WriteFailed;
 use LIT\MCP\ChangeLog\ChangeLog;
 use LIT\MCP\Integrations\Divi\Release\DiviFeature;
+use LIT\MCP\Integrations\Divi\Release\DiviLocked;
 use LIT\MCP\Integrations\Divi\Release\RequiresDiviFeatures;
 use LIT\MCP\Integrations\Media\AdminIncludes;
 use LIT\MCP\Integrations\Media\RemoteFileFetcher;
@@ -409,6 +410,8 @@ final class DiviFontsUploadAbility implements Ability, RequiresDiviFeatures
     {
         try {
             $installed = $this->installer->install($name, $paths, $weights, $family);
+        } catch (DiviLocked $e) {
+            throw $e; // a refusal, not a write failure; assertFeature runs before anything is stored
         } catch (RuntimeException $e) {
             // FontInstaller stores nothing when it throws.
             throw WriteFailed::rolledBack(self::REASON, $e, 'font upload: ' . $e->getMessage());
diff --git a/tests/Unit/Integrations/Divi/Design/DiviFontsUploadAbilityTest.php b/tests/Unit/Integrations/Divi/Design/DiviFontsUploadAbilityTest.php
index ab3fc53..c571dad 100644
--- a/tests/Unit/Integrations/Divi/Design/DiviFontsUploadAbilityTest.php
+++ b/tests/Unit/Integrations/Divi/Design/DiviFontsUploadAbilityTest.php
@@ -11,9 +11,12 @@ use LIT\MCP\Integrations\Divi\Design\DiviFontsUploadAbility;
 use LIT\MCP\Integrations\Divi\Design\FontCatalog;
 use LIT\MCP\Integrations\Divi\Design\FontInstaller;
 use LIT\MCP\Integrations\Divi\Release\DiviFeature;
+use LIT\MCP\Integrations\Divi\Release\DiviLocked;
+use LIT\MCP\Integrations\Divi\Release\ReleaseState;
 use LIT\MCP\Integrations\Media\RemoteFileFetcher;
 use LIT\MCP\Limits;
 use LIT\MCP\Tests\Support\FakeChangeLog;
+use LIT\MCP\Tests\Support\ReleaseMatrices;
 use LIT\MCP\Tests\Unit\TestCase;
 use Mockery;
 use Mockery\MockInterface;
@@ -492,4 +495,23 @@ final class DiviFontsUploadAbilityTest extends TestCase
         }
         $this->assertTempFilesRemoved();
     }
+
+    public function testALockFromTheInstallerPropagatesInsteadOfBecomingAWriteFailure(): void
+    {
+        $locked = new DiviLocked(
+            ReleaseMatrices::uniform(ReleaseState::Incompatible, '5.3.0', ['x']),
+            [DiviFeature::FontUpload]
+        );
+        $installer = self::installer();
+        $installer->allows('install')->andThrow($locked);
+        $installer->expects('remove')->never();
+
+        try {
+            $this->ability($installer)->execute(self::input(['confirm' => true]));
+            self::fail('DiviLocked expected');
+        } catch (DiviLocked $e) {
+            self::assertSame($locked, $e);
+        }
+        $this->assertTempFilesRemoved();
+    }
 }