add used sources

src/Agent/PromptBuilder.php

@@ -81,6 +81,7 @@ final readonly class PromptBuilder
 
         if($swagFullOutPut){
             $shopBlock = "SHOP SEARCH QUERY: " . trim($swagFullOutPut)."\n";
+            $shopBlock .= "Source: Shop Search\n";
         }
 
         if ($shopResults !== []) {
@@ -158,12 +159,14 @@ final readonly class PromptBuilder
 
             $knowledgeParts[] =
                 "RETRIEVED KNOWLEDGE (supporting):\n" .
+                "Source: Documents \n".
                 implode("\n\n", $lines);
         }
 
         if ($urlContent !== '') {
             $knowledgeParts[] =
                 "CONTENT FROM URL (supporting):\n" .
+                "Source: URL \n".
                 $urlContent;
         }