diff --git a/src/Agent/AgentRunner.php b/src/Agent/AgentRunner.php
index c115bb9..957165f 100644
--- a/src/Agent/AgentRunner.php
+++ b/src/Agent/AgentRunner.php
@@ -30,7 +30,7 @@ final readonly class AgentRunner
     {
     }
 
-    public function run(string $prompt, string $userId): Generator
+    public function run(string $prompt, string $userId, ?bool $includeFullContext = false): Generator
     {
         $prompt = trim($prompt);
 
@@ -47,7 +47,7 @@ final readonly class AgentRunner
             // ---------------------------------------------------------
             // 1) Context strategy
             // ---------------------------------------------------------
-            $includeFullContext = false;
+            //$includeFullContext = false;
 
             // ---------------------------------------------------------
             // 2) Extract URL content (if present)
diff --git a/src/Agent/PromptBuilder.php b/src/Agent/PromptBuilder.php
index 134b78e..e303c0a 100644
--- a/src/Agent/PromptBuilder.php
+++ b/src/Agent/PromptBuilder.php
@@ -32,7 +32,7 @@ final readonly class PromptBuilder
         string $userId,
         string $urlContent,
         array  $knowledgeChunks,
-        bool   $fullContext = false,
+        ?bool  $fullContext = false,
     ): string
     {
         $now = (new DateTimeImmutable())->format('Y-m-d H:i:s');
@@ -47,7 +47,8 @@ final readonly class PromptBuilder
             throw new \RuntimeException('No active system prompt configured.');
         }
 
-        $systemBlock = "SYSTEM:\n" . $activePrompt->getContent();
+        $activeSystemPrompt = str_replace('{%now%}', $now, $activePrompt->getContent());
+        $systemBlock = "SYSTEM:\n" . $activeSystemPrompt;
 
         // ------------------------------------------------------------
         // 2) CONVERSATION CONTEXT (AUTHORITATIVE)
diff --git a/templates/admin/system/prompt.html.twig b/templates/admin/system/prompt.html.twig
index c256056..4ff90ce 100644
--- a/templates/admin/system/prompt.html.twig
+++ b/templates/admin/system/prompt.html.twig
@@ -27,7 +27,7 @@
                 </div>
 
                 <div class="mb-3">
-                    <label class="form-label">Prompt Inhalt</label>
+                    <label class="form-label">Prompt Inhalt | Variablen: {% verbatim %}{% now %}{% endverbatim %} = Datum/Zeit</label>
                     <textarea name="content"
                               rows="16"
                               class="form-control bg-dark text-info border-secondary"