diff --git a/docs/guides/divi-attrs.md b/docs/guides/divi-attrs.md
index f07f680..7669eba 100644
--- a/docs/guides/divi-attrs.md
+++ b/docs/guides/divi-attrs.md
@@ -38,8 +38,8 @@ zusammengeführt): z. B. bei `module.decoration.sizing` einer Spalte `flexType`
 
 Unbekannte Pfade → Fehler `invalid_attr_path` mit Vorschlägen unter `fields`. Texte werden bereinigt
 (HTML nur, wo Divi Rich-Text erwartet; Links ohne `javascript:`). `$variable`-Verweise werden geparst,
-geprüft und vom Plugin neu erzeugt (siehe `divi-placeholders`). Eigenes HTML, CSS und HTML-Attribute
-(`…decoration.attributes`, `…advanced.html`, `…css…`) nur mit dem Recht `unfiltered_html`, sonst „nur im
+geprüft und vom Plugin neu erzeugt (siehe `divi-placeholders`). Eigenes HTML, CSS, HTML-Attribute und
+Interaktionen (`…decoration.attributes`, `…decoration.interactions`, `…advanced.html`, `…css…`) nur mit dem Recht `unfiltered_html`, sonst „nur im
 Divi-Builder“. Unberührte Teile der Seite bleiben byte-identisch; Ausnahme: Divi selbst normalisiert Seiten
 mit eigenen HTML-/Attribut-Feldern beim Speichern – nur wenn die Seite noch nicht in Divis eigener gespeicherter Form vorliegt (z. B. importierter oder direkt in die Datenbank geschriebener Inhalt); über den Divi-Builder oder LIT MCP gespeicherte Seiten betrifft das praktisch nie (Warnung in der Antwort, neue `tree_rev` gilt).
 
diff --git a/docs/guides/divi-shortform.md b/docs/guides/divi-shortform.md
index 1c9fb1b..694e5e2 100644
--- a/docs/guides/divi-shortform.md
+++ b/docs/guides/divi-shortform.md
@@ -106,8 +106,8 @@ Bedarf die Vorlage im Builder neu wählen).
 
 Alle Werte werden vor dem Speichern bereinigt: Texte ohne HTML, Rich-Text ohne `unfiltered_html` nur mit dem
 HTML, das WordPress in Beiträgen erlaubt, Links ohne `javascript:`.
-`$variable`-Verweise werden geparst, geprüft und vom Plugin neu erzeugt. Eigenes HTML, CSS und HTML-Attribute eines Moduls (`…decoration.attributes`, `…advanced.html`,
-`…css…`) ändert nur, wer das Recht `unfiltered_html` hat – sonst „nur im Divi-Builder“. Unberührte Teile der
+`$variable`-Verweise werden geparst, geprüft und vom Plugin neu erzeugt. Eigenes HTML, CSS, HTML-Attribute und Interaktionen eines Moduls (`…decoration.attributes`,
+`…decoration.interactions`, `…advanced.html`, `…css…`) ändert nur, wer das Recht `unfiltered_html` hat – sonst „nur im Divi-Builder“. Unberührte Teile der
 Seite bleiben byte-identisch; Ausnahme: Divi selbst normalisiert Seiten mit eigenen HTML-/Attribut-Feldern
 beim Speichern – nur wenn die Seite noch nicht in Divis eigener gespeicherter Form vorliegt (z. B. importierter oder direkt in die Datenbank geschriebener Inhalt); über den Divi-Builder oder LIT MCP gespeicherte Seiten betrifft das praktisch nie (dann Warnung, dass der Inhalt beim Speichern verändert wurde – mit der neuen `tree_rev`
 weiterarbeiten).
diff --git a/src/Integrations/Divi/Compose/ValueCleaner.php b/src/Integrations/Divi/Compose/ValueCleaner.php
index 142ef8a..0d74b72 100644
--- a/src/Integrations/Divi/Compose/ValueCleaner.php
+++ b/src/Integrations/Divi/Compose/ValueCleaner.php
@@ -54,9 +54,12 @@ final class ValueCleaner
     /**
      * Raw HTML/CSS fields, and the ones Divi re-serializes whole pages for (rulings S7/S26), by
      * path shape at any depth: module.advanced.html(.htmlBefore), module.decoration.attributes,
-     * any free-form custom CSS path of any module (css, css.*, title.css.*, css.advanced.customCss).
+     * any free-form custom CSS path of any module (css, css.*, title.css.*, css.advanced.customCss),
+     * and interactions (ruling P16: *.decoration.interactions – Divi's frontend script applies the
+     * "Attribute" effect with setAttribute, e.g. an onclick handler, and sets cookies/presets).
      */
-    private const BUILDER_ONLY = '/(^|\.)(decoration\.attributes|advanced\.html|advanced\.customCss|css)(\.|$)/';
+    private const BUILDER_ONLY
+        = '/(^|\.)(decoration\.attributes|decoration\.interactions|advanced\.html|advanced\.customCss|css)(\.|$)/';
 
     public function __construct(
         private ModuleCatalog $catalog,
@@ -134,7 +137,7 @@ final class ValueCleaner
     {
         if (preg_match(self::BUILDER_ONLY, $path) === 1 && ! $this->sanitizer->allowsUnfilteredHtml()) {
             throw new InvalidArgumentException(sprintf(
-                '"%s" (eigenes HTML, CSS oder HTML-Attribute) ist nur im Divi-Builder änderbar '
+                '"%s" (eigenes HTML, CSS, HTML-Attribute oder Interaktionen) ist nur im Divi-Builder änderbar '
                     . '(oder mit dem Recht unfiltered_html).',
                 $path
             ));
diff --git a/tests/Unit/Integrations/Divi/Compose/AttrWriterTest.php b/tests/Unit/Integrations/Divi/Compose/AttrWriterTest.php
index 579236f..6553d2b 100644
--- a/tests/Unit/Integrations/Divi/Compose/AttrWriterTest.php
+++ b/tests/Unit/Integrations/Divi/Compose/AttrWriterTest.php
@@ -376,4 +376,33 @@ final class AttrWriterTest extends TestCase
         $heading = ComposeFixture::attrWriter()->apply('divi/heading', [], ['module.meta.adminLabel' => ['desktop' => 'x']], 'attrs');
         self::assertSame([], $heading['errors'], 'only section type and specialty columns are structure');
     }
+
+    /** Ruling P16: interactions (setAttribute on the frontend) only with unfiltered_html – set and removal. */
+    public function testInteractionsNeedUnfilteredHtml(): void
+    {
+        $interaction = ['interactions' => [[
+            'trigger' => 'click',
+            'effect' => 'addAttribute',
+            'attributeName' => 'data-probe',
+            'attributeValue' => '1',
+        ]]];
+        $changes = ['module.decoration.interactions' => ['desktop' => $interaction]];
+
+        $editor = ComposeFixture::attrWriter()->apply('divi/text', self::TEXT, $changes, 'attrs');
+        self::assertSame(self::TEXT, $editor['attrs']);
+        self::assertStringContainsString('nur im Divi-Builder', $editor['errors']['attrs.module.decoration.interactions']);
+
+        $removal = ComposeFixture::attrWriter()->apply('divi/text', self::TEXT, ['module.decoration.interactions' => null], 'attrs');
+        self::assertStringContainsString('nur im Divi-Builder', $removal['errors']['attrs.module.decoration.interactions']);
+
+        $admin = ComposeFixture::attrWriter(true)->apply('divi/text', self::TEXT, $changes, 'attrs');
+        self::assertSame([], $admin['errors']);
+        self::assertSame(
+            'data-probe',
+            $admin['attrs']['module']['decoration']['interactions']['desktop']['value']['interactions'][0]['attributeName']
+        );
+        $adminRemoval = ComposeFixture::attrWriter(true)->apply('divi/text', $admin['attrs'], ['module.decoration.interactions' => null], 'attrs');
+        self::assertSame([], $adminRemoval['errors']);
+        self::assertArrayNotHasKey('interactions', $adminRemoval['attrs']['module']['decoration'] ?? []);
+    }
 }
diff --git a/tests/Unit/Integrations/Divi/Compose/ShortformWriterTest.php b/tests/Unit/Integrations/Divi/Compose/ShortformWriterTest.php
index 158a868..f9e074b 100644
--- a/tests/Unit/Integrations/Divi/Compose/ShortformWriterTest.php
+++ b/tests/Unit/Integrations/Divi/Compose/ShortformWriterTest.php
@@ -10,6 +10,7 @@ use LIT\MCP\Integrations\Divi\Compose\ShortformWriter;
 use LIT\MCP\Integrations\Divi\Compose\ValueCleaner;
 use LIT\MCP\Integrations\Divi\Compose\VariableRef;
 use LIT\MCP\Integrations\Divi\Pages\DynamicContentMap;
+use LIT\MCP\Integrations\Divi\Schema\ShortformMap;
 use LIT\MCP\Tests\Support\ComposeFixture;
 use LIT\MCP\Tests\Support\DiviFixtures;
 use PHPUnit\Framework\TestCase;
@@ -426,4 +427,26 @@ final class ShortformWriterTest extends TestCase
 
         return new ShortformWriter(new Placeholders($design, ComposeFixture::links()), ComposeFixture::media(), $cleaner);
     }
+
+    /** Ruling P16: no curated short field reaches interactions, and a field that did would be gated. */
+    public function testInteractionsAreBuilderOnlyInTheShortForm(): void
+    {
+        foreach (ShortformMap::types() as $type) {
+            foreach (ShortformMap::fields($type) as $name => $field) {
+                self::assertStringNotContainsString('interactions', $field['path'], $type . '.' . $name);
+            }
+        }
+
+        $modules = ['raw' => [
+            'effects' => ['path' => 'module.decoration.interactions', 'sub' => 'interactions', 'kind' => 'text', 'description' => 'x'],
+        ]];
+        foreach (['data-probe', null] as $value) {
+            $result = ComposeFixture::shortform(false, $modules)->apply('raw', self::BASE, ['effects' => $value], 'n');
+            self::assertStringContainsString('nur im Divi-Builder', $result['errors']['n.effects']);
+            self::assertSame(self::BASE, $result['attrs']);
+        }
+
+        $admin = ComposeFixture::shortform(true, $modules)->apply('raw', [], ['effects' => 'x'], 'n');
+        self::assertSame([], $admin['errors']);
+    }
 }
diff --git a/tests/Unit/Integrations/Divi/Compose/StoredNodeGuardTest.php b/tests/Unit/Integrations/Divi/Compose/StoredNodeGuardTest.php
index 88b12d6..b65a716 100644
--- a/tests/Unit/Integrations/Divi/Compose/StoredNodeGuardTest.php
+++ b/tests/Unit/Integrations/Divi/Compose/StoredNodeGuardTest.php
@@ -148,6 +148,17 @@ final class StoredNodeGuardTest extends TestCase
                 ])]]),
                 'module.advanced.html',
             ],
+            'interactions (P16)' => [
+                self::node('divi/text', ['module' => ['decoration' => ['interactions' => self::desktop([
+                    'interactions' => [[
+                        'trigger' => 'click',
+                        'effect' => 'addAttribute',
+                        'attributeName' => 'data-probe',
+                        'attributeValue' => '1',
+                    ]],
+                ])]]]),
+                'module.decoration.interactions',
+            ],
             // Code module (E6).
             'code module' => [
                 self::node('divi/code', ['content' => ['innerContent' => self::desktop(self::PROBE_SCRIPT)]]),
diff --git a/tests/Unit/Integrations/Divi/Compose/ValueCleanerTest.php b/tests/Unit/Integrations/Divi/Compose/ValueCleanerTest.php
index 706e1fd..ab21058 100644
--- a/tests/Unit/Integrations/Divi/Compose/ValueCleanerTest.php
+++ b/tests/Unit/Integrations/Divi/Compose/ValueCleanerTest.php
@@ -198,4 +198,38 @@ final class ValueCleanerTest extends TestCase
         self::assertNull(($cleaner->textReplacementFor('divi/button'))('button.innerContent', 'linkUrl', 'https://x.test'));
         self::assertNull(($cleaner->textReplacementFor('divi/code'))('content.innerContent', null, 'x'));
     }
+
+    /**
+     * Ruling P16: Divi's interactions ("Attribute" effect → setAttribute on the frontend, Cookie,
+     * Preset) are builder-only like HTML attributes, at every depth.
+     */
+    public function testInteractionPathsNeedUnfilteredHtml(): void
+    {
+        $value = ['interactions' => [[
+            'trigger' => 'click',
+            'effect' => 'addAttribute',
+            'attributeName' => 'data-probe',
+            'attributeValue' => '1',
+        ]]];
+        $paths = [
+            'module.decoration.interactions',
+            'module.decoration.interactions.desktop',
+            'title.decoration.interactions',
+            'decoration.interactions',
+        ];
+        foreach ($paths as $path) {
+            try {
+                ComposeFixture::cleaner()->clean('divi/text', $path, $value);
+                self::fail('Accepted for an editor: ' . $path);
+            } catch (InvalidArgumentException $e) {
+                self::assertStringContainsString('nur im Divi-Builder', $e->getMessage());
+            }
+
+            self::assertSame($value, ComposeFixture::cleaner(true)->clean('divi/text', $path, $value));
+        }
+
+        // Only a whole "interactions" segment below "decoration" counts.
+        self::assertSame('x', ComposeFixture::cleaner()->clean('divi/text', 'module.decoration.interactionsish', 'x'));
+        self::assertSame('x', ComposeFixture::cleaner()->clean('divi/text', 'module.advanced.interactions', 'x'));
+    }
 }