diff --git a/src/Integrations/Divi/Compose/Warnings.php b/src/Integrations/Divi/Compose/Warnings.php
index 6953489..63051e8 100644
--- a/src/Integrations/Divi/Compose/Warnings.php
+++ b/src/Integrations/Divi/Compose/Warnings.php
@@ -9,6 +9,7 @@ use LIT\MCP\Integrations\Divi\BlockTree\Block;
 use LIT\MCP\Integrations\Divi\BlockTree\NodeIndex;
 use LIT\MCP\Integrations\Divi\BlockTree\NodeSummary;
 use LIT\MCP\Integrations\Divi\Design\DesignSystem;
+use LIT\MCP\Integrations\Divi\Design\PresetAssignment;
 use LIT\MCP\Integrations\Divi\Schema\ShortformMap;
 
 defined('ABSPATH') || exit;
@@ -16,8 +17,9 @@ defined('ABSPATH') || exit;
 /**
  * Quality warnings of a Divi write (spec §5.5) – only about the nodes this call created or
  * changed (and their children): fixed colors/fonts where a global one fits, images without
- * alt text, empty modules, heading jumps, the code module. Similar existing sections
- * (lit/library-find-similar) follow with the Library in Etappe 3. Pure PHP.
+ * alt text, empty modules, heading jumps, the code module, local values that cover an assigned
+ * preset (ruling R5). Similar existing sections (lit/library-find-similar) follow with the Library
+ * in Etappe 3. Pure PHP.
  */
 final class Warnings
 {
@@ -33,7 +35,7 @@ final class Warnings
         'divi/slide' => ['image.innerContent', 'src', 'alt'],
     ];
 
-    public function __construct(private DesignSystem $design)
+    public function __construct(private DesignSystem $design, private ?PresetAssignment $presets = null)
     {
     }
 
@@ -58,7 +60,8 @@ final class Warnings
                 ...$this->code($block, $id),
                 ...$this->image($block, $id),
                 ...$this->empty($block, $id),
-                ...$this->fixedValues($block, $id)
+                ...$this->fixedValues($block, $id),
+                ...$this->coveredPresets($block, $id)
             );
         }
 
@@ -161,6 +164,27 @@ final class Warnings
         return $warnings;
     }
 
+    /**
+     * Ruling R5: local values that cover an explicitly assigned preset of the block. Only Divi blocks that name a
+     * preset cost work (opaque blocks – global instances – are never looked into); the preset book is read when the
+     * first such block comes up, never for a page without presets.
+     *
+     * @return list<string>
+     */
+    private function coveredPresets(Block $block, string $id): array
+    {
+        if ($this->presets === null || ! $block->isDivi() || $block->isOpaque() || ! self::namesPresets($block)) {
+            return [];
+        }
+
+        return $this->presets->overrides()->describe($id, $block->attrs(), $this->presets->names());
+    }
+
+    private static function namesPresets(Block $block): bool
+    {
+        return NodeSummary::presetIds($block) !== [] || NodeSummary::groupPresets($block) !== [];
+    }
+
     /**
      * Heading jumps (h2 → h4) in page order where the later heading belongs to a touched block.
      *
diff --git a/src/Integrations/Divi/Pages/DiviComposition.php b/src/Integrations/Divi/Pages/DiviComposition.php
index 93b91dd..9a2a31d 100644
--- a/src/Integrations/Divi/Pages/DiviComposition.php
+++ b/src/Integrations/Divi/Pages/DiviComposition.php
@@ -160,6 +160,6 @@ class DiviComposition
 
     public function warnings(): Warnings
     {
-        return new Warnings($this->design->read());
+        return new Warnings($this->design->read(), $this->presets());
     }
 }
diff --git a/tests/Support/ComposeFixture.php b/tests/Support/ComposeFixture.php
index 7e1ae3a..d401586 100644
--- a/tests/Support/ComposeFixture.php
+++ b/tests/Support/ComposeFixture.php
@@ -247,21 +247,24 @@ final class ComposeFixture
 
     /**
      * PresetAssignment as the live wiring builds it: the book is $book (default: bookOf($design), else of the sample
-     * design system), the id check is the cleaner's keepsId().
+     * design system), the id check is the cleaner's keepsId(). $load replaces $book with a loader the test can
+     * count.
      *
      * @param (Closure(string): array<string, string>)|null $groupsOf
+     * @param (Closure(): PresetBook)|null                  $load
      */
     public static function presetAssignment(
         ?PresetBook $book = null,
         ?Closure $groupsOf = null,
         ?DesignSystem $design = null,
-        ?ValueCleaner $cleaner = null
+        ?ValueCleaner $cleaner = null,
+        ?Closure $load = null
     ): PresetAssignment {
         $book ??= self::bookOf($design ?? DiviFixtures::designSystem());
         $cleaner ??= self::cleaner();
 
         return new PresetAssignment(
-            static fn (): PresetBook => $book,
+            $load ?? static fn (): PresetBook => $book,
             $groupsOf ?? static fn (string $module): array => [],
             $cleaner->keepsId(...)
         );
diff --git a/tests/Unit/Integrations/Divi/Compose/WarningsTest.php b/tests/Unit/Integrations/Divi/Compose/WarningsTest.php
index f73ebad..5989476 100644
--- a/tests/Unit/Integrations/Divi/Compose/WarningsTest.php
+++ b/tests/Unit/Integrations/Divi/Compose/WarningsTest.php
@@ -4,9 +4,12 @@ declare(strict_types=1);
 
 namespace LIT\MCP\Tests\Unit\Integrations\Divi\Compose;
 
+use LIT\MCP\Integrations\Divi\BlockTree\Block;
 use LIT\MCP\Integrations\Divi\BlockTree\Document;
 use LIT\MCP\Integrations\Divi\BlockTree\NodeIndex;
 use LIT\MCP\Integrations\Divi\Compose\Warnings;
+use LIT\MCP\Integrations\Divi\Design\PresetAssignment;
+use LIT\MCP\Integrations\Divi\Design\PresetBook;
 use LIT\MCP\Tests\Support\ComposeFixture;
 use LIT\MCP\Tests\Support\DiviFixtures;
 use PHPUnit\Framework\TestCase;
@@ -53,4 +56,144 @@ final class WarningsTest extends TestCase
 
         self::assertSame([], (new Warnings(DiviFixtures::designSystem()))->collect(NodeIndex::build($document), []));
     }
+
+    /** @return array<string, mixed> Button attrs with a preset and a local font color. */
+    private static function button(string $color, string $preset = 'p-2'): array
+    {
+        return [
+            'modulePreset' => [$preset],
+            'button' => ['decoration' => ['font' => ['font' => ['desktop' => ['value' => ['color' => $color]]]]]],
+        ];
+    }
+
+    /** Preset p-2 "CTA primär" sets the font color #ffffff; g-1 is a group preset without values. */
+    private static function book(): PresetBook
+    {
+        return PresetBook::fromDivi([
+            'module' => ['divi/button' => ['default' => '', 'items' => [
+                'p-2' => [
+                    'id' => 'p-2',
+                    'name' => 'CTA primär',
+                    'moduleName' => 'divi/button',
+                    'attrs' => ['button' => ['decoration' => ['font' => ['font' => [
+                        'desktop' => ['value' => ['color' => '#ffffff']],
+                    ]]]]],
+                ],
+            ]]],
+            'group' => ['divi/font' => ['default' => '', 'items' => [
+                'g-1' => ['id' => 'g-1', 'name' => 'Fließtext groß', 'groupName' => 'divi/font'],
+            ]]],
+        ]);
+    }
+
+    /** @param int $loads Counts how often the preset book is read. */
+    private static function presets(int &$loads): PresetAssignment
+    {
+        return ComposeFixture::presetAssignment(null, null, null, null, static function () use (&$loads): PresetBook {
+            ++$loads;
+
+            return self::book();
+        });
+    }
+
+    /**
+     * @param list<Block> $blocks top-level blocks of the page
+     * @param list<Block> $touched
+     * @return array{0: list<string>, 1: NodeIndex}
+     */
+    private static function collect(array $blocks, array $touched, PresetAssignment $presets): array
+    {
+        $document = new Document();
+        foreach ($blocks as $block) {
+            $document->append($block);
+        }
+        $index = NodeIndex::build($document);
+        $warnings = (new Warnings(DiviFixtures::designSystem(), $presets))->collect($index, $touched);
+
+        return [
+            array_values(array_filter($warnings, static fn (string $w): bool => str_contains($w, 'überdecken'))),
+            $index,
+        ];
+    }
+
+    public function testWarnsWhenLocalValuesCoverAnAssignedPreset(): void
+    {
+        $loads = 0;
+        $button = Block::create('divi/button', self::button('#000000'));
+
+        [$covering, $index] = self::collect([$button], [$button], self::presets($loads));
+
+        self::assertCount(1, $covering);
+        self::assertStringStartsWith(
+            $index->idOf($button) . ': lokale Werte überdecken „CTA primär“: ',
+            $covering[0]
+        );
+        self::assertStringContainsString('button.decoration.font.font', $covering[0]);
+        self::assertStringEndsWith('clear_overrides: true entfernt sie.', $covering[0]);
+    }
+
+    public function testEqualValuesAndUntouchedBlocksDoNotWarn(): void
+    {
+        $loads = 0;
+        $same = Block::create('divi/button', self::button('#ffffff'));
+        $other = Block::create('divi/button', self::button('#000000'));
+
+        [$covering] = self::collect([$same, $other], [$same], self::presets($loads));
+
+        self::assertSame([], $covering, 'the same value covers nothing; $other was not touched');
+    }
+
+    public function testChildrenOfATouchedBlockAreChecked(): void
+    {
+        $loads = 0;
+        $button = Block::create('divi/button', self::button('#000000'));
+        $section = Block::create('divi/section', [], [
+            Block::create('divi/row', [], [Block::create('divi/column', [], [$button])]),
+        ]);
+
+        [$covering, $index] = self::collect([$section], [$section], self::presets($loads));
+
+        self::assertCount(1, $covering);
+        self::assertStringStartsWith($index->idOf($button) . ': lokale Werte', $covering[0]);
+    }
+
+    public function testThePresetBookIsOnlyReadForBlocksThatHavePresets(): void
+    {
+        $loads = 0;
+        $plain = Block::create('divi/button', [
+            'button' => ['decoration' => ['font' => ['font' => ['desktop' => ['value' => ['color' => '#000000']]]]]],
+        ]);
+        $presets = self::presets($loads);
+
+        self::collect([$plain], [$plain], $presets);
+        self::assertSame(0, $loads, 'no touched block names a preset');
+
+        $grouped = Block::create('divi/button', [
+            'groupPreset' => ['button.decoration.font.font' => ['groupName' => 'divi/font', 'presetId' => ['g-1']]],
+        ]);
+        $stacked = Block::create('divi/button', self::button('#000000'));
+        [$covering] = self::collect([$plain, $grouped, $stacked], [$plain, $grouped, $stacked], $presets);
+
+        self::assertSame(1, $loads, 'read once, for the first block that has a preset');
+        self::assertCount(1, $covering);
+    }
+
+    public function testOpaqueAndForeignBlocksAreSkipped(): void
+    {
+        $loads = 0;
+        $attrs = self::button('#000000');
+        $opaque = Block::parsed(
+            'divi/button',
+            $attrs + ['globalModule' => '9'],
+            '<!-- wp:divi/button {"globalModule":"9"} /-->',
+            true,
+            true
+        );
+        $foreign = Block::create('core/paragraph', $attrs);
+
+        [$covering] = self::collect([$opaque, $foreign], [$opaque, $foreign], self::presets($loads));
+
+        self::assertSame([], $covering);
+        self::assertSame(0, $loads);
+    }
 }
diff --git a/tests/Unit/Integrations/Divi/Pages/DiviCompositionTest.php b/tests/Unit/Integrations/Divi/Pages/DiviCompositionTest.php
index 6aebcc0..fad65fb 100644
--- a/tests/Unit/Integrations/Divi/Pages/DiviCompositionTest.php
+++ b/tests/Unit/Integrations/Divi/Pages/DiviCompositionTest.php
@@ -59,7 +59,14 @@ final class DiviCompositionTest extends TestCase
         $writer->expects('presets')->times($reads)->andReturn([
             'module' => ['divi/button' => ['default' => 'p-1', 'items' => [
                 'p-1' => ['id' => 'p-1', 'name' => 'Standard', 'moduleName' => 'divi/button'],
-                'p-2' => ['id' => 'p-2', 'name' => 'CTA primär', 'moduleName' => 'divi/button'],
+                'p-2' => [
+                    'id' => 'p-2',
+                    'name' => 'CTA primär',
+                    'moduleName' => 'divi/button',
+                    'attrs' => ['button' => ['decoration' => ['font' => ['font' => [
+                        'desktop' => ['value' => ['color' => '#ffffff']],
+                    ]]]]],
+                ],
             ]]],
             'group' => ['divi/font' => ['default' => '', 'items' => [
                 'g-1' => ['id' => 'g-1', 'name' => 'Fließtext groß', 'groupName' => 'divi/font'],
@@ -238,4 +245,24 @@ final class DiviCompositionTest extends TestCase
         self::assertNotSame($seven->presets(), $base->forPost(8)->presets());
         self::assertNotSame($base->presets(), $seven->presets());
     }
+
+    public function testWarningsKnowTheWritersPresets(): void
+    {
+        $composition = $this->composition($this->presetSource())->forPost(7);
+        $button = Block::create('divi/button', [
+            'modulePreset' => ['p-2'],
+            'button' => ['decoration' => ['font' => ['font' => ['desktop' => ['value' => ['color' => '#000000']]]]]],
+        ]);
+        $document = new Document();
+        $document->append($button);
+        $index = NodeIndex::build($document);
+
+        $warnings = $composition->warnings()->collect($index, [$button]);
+
+        $covering = array_values(
+            array_filter($warnings, static fn (string $w): bool => str_contains($w, 'überdecken'))
+        );
+        self::assertCount(1, $covering);
+        self::assertStringContainsString('„CTA primär“', $covering[0]);
+    }
 }