fix p47

config/retriex/commerce.yaml

@@ -146,6 +146,7 @@ parameters:
       price_removal_minmax: '/\b(?:unter|bis|max(?:imal)?|ab|mindestens|min)\s+\d+(?:[.,]\d+)?\s*euro\b/u'
       price_removal_intent_template: '/\b(?:{price_pattern})\b/u'
       direct_product_digit: '/\d/u'
+      exact_product_number_search_text: '/^\s*(\d{4,12})\s*$/u'
       model_like: '/\b[a-zäöüß][a-zäöüß®\-]*(?:\s+[a-zäöüß][a-zäöüß®\-]*){0,2}\s+\d{2,5}[a-z0-9\-]*\b/u'
       accessory_like: '/\b(?:indikator|indicator|reagenz|reagent|kit|set)\s+\d{1,5}[a-z0-9\-]*\b/u'
       contains_digit: '/\d/u'

src/Commerce/CommerceQueryParser.php

@@ -22,6 +22,23 @@ final readonly class CommerceQueryParser
     ) {
     }
 
+    public function extractExactProductNumberSearchText(string $searchText): ?string
+    {
+        $searchText = trim($this->normalize($searchText));
+
+        if ($searchText === '') {
+            return null;
+        }
+
+        if (preg_match($this->config->getExactProductNumberSearchTextPattern(), $searchText, $matches) !== 1) {
+            return null;
+        }
+
+        $productNumber = trim((string) ($matches[1] ?? ''));
+
+        return $productNumber !== '' ? $productNumber : null;
+    }
+
     public function parse(
         string $originalPrompt,
         string $intent,

src/Commerce/ShopSearchService.php

@@ -377,6 +377,18 @@ final class ShopSearchService
         string $originalPrompt,
         bool $usesHistoryContext
     ): array {
+        $exactProductNumber = $this->queryParser->extractExactProductNumberSearchText($query->searchText);
+
+        if ($exactProductNumber !== null) {
+            return $this->executeExactProductNumberSearch(
+                productNumber: $exactProductNumber,
+                query: $query,
+                commerceIntent: $commerceIntent,
+                originalPrompt: $originalPrompt,
+                usesHistoryContext: $usesHistoryContext
+            );
+        }
+
         $criteria = $this->criteriaBuilder->build($query, $this->maxResults);
 
         try {
@@ -448,6 +460,53 @@ final class ShopSearchService
         }
     }
 
+    /**
+     * @return ShopProductResult[]
+     */
+    private function executeExactProductNumberSearch(
+        string $productNumber,
+        CommerceSearchQuery $query,
+        string $commerceIntent,
+        string $originalPrompt,
+        bool $usesHistoryContext
+    ): array {
+        $criteria = $this->criteriaBuilder->buildExactProductNumber($productNumber, 5);
+
+        $this->logger->info('Shop search using exact product-number criteria', [
+            'commerceIntent' => $commerceIntent,
+            'originalPrompt' => $originalPrompt,
+            'normalizedPrompt' => $query->normalizedPrompt,
+            'searchText' => $query->searchText,
+            'productNumber' => $productNumber,
+            'usesHistoryContext' => $usesHistoryContext,
+        ]);
+
+        try {
+            $response = $this->storeApiClient->searchProducts($criteria);
+
+            return $this->mapAndLogSearchResponse(
+                response: $response,
+                query: $query,
+                commerceIntent: $commerceIntent,
+                originalPrompt: $originalPrompt,
+                usesHistoryContext: $usesHistoryContext,
+                usedSafeCriteria: true
+            );
+        } catch (
+            ClientExceptionInterface |
+            RedirectionExceptionInterface |
+            ServerExceptionInterface |
+            TransportExceptionInterface |
+            StoreApiException |
+            \RuntimeException $e
+        ) {
+            $this->recordFailedSearch($e);
+            $this->logShopSearchFailure($query, $commerceIntent, $originalPrompt, $usesHistoryContext, $e);
+
+            return [];
+        }
+    }
+
     /**
      * @return ShopProductResult[]|null
      */

src/Config/CommerceQueryParserConfig.php

@@ -206,6 +206,11 @@ final class CommerceQueryParserConfig
         return $this->string('patterns.direct_product_digit');
     }
 
+    public function getExactProductNumberSearchTextPattern(): string
+    {
+        return $this->string('patterns.exact_product_number_search_text');
+    }
+
     public function getDirectProductMaxTokens(): int
     {
         return $this->int('limits.direct_product_max_tokens');

src/Shopware/ShopwareCriteriaBuilder.php

@@ -65,6 +65,66 @@ final class ShopwareCriteriaBuilder
         );
     }
 
+    /**
+     * Builds a narrow, rich-text-free criteria payload for exact article-number lookups.
+     * Pure product-number searches should not run through Shopware full-text search,
+     * because broad numeric search can surface unrelated products and trigger JSON
+     * encoding problems in rich text/custom fields.
+     */
+    public function buildExactProductNumber(string $productNumber, ?int $limit = 5): array
+    {
+        $productNumber = trim($productNumber);
+
+        $criteria = [
+            'page' => 1,
+            'limit' => max(1, $limit),
+            'total-count-mode' => 0,
+            'includes' => [
+                'product' => [
+                    'id',
+                    'name',
+                    'translated.name',
+                    'productNumber',
+                    'available',
+                    'calculatedPrice',
+                    'manufacturer',
+                ],
+                'product_manufacturer' => [
+                    'name',
+                ],
+                'calculated_price' => [
+                    'unitPrice',
+                    'totalPrice',
+                    'referencePrice',
+                    'listPrice',
+                    'regulationPrice',
+                ],
+            ],
+            'associations' => [
+                'manufacturer' => new \stdClass(),
+            ],
+            'filter' => [
+                [
+                    'type' => 'equals',
+                    'field' => 'active',
+                    'value' => true,
+                ],
+                [
+                    'type' => 'equals',
+                    'field' => 'available',
+                    'value' => true,
+                ],
+                [
+                    'type' => 'equals',
+                    'field' => 'productNumber',
+                    'value' => $productNumber,
+                ],
+            ],
+        ];
+
+        return $criteria;
+    }
+
     /**
      * Builds an ultra-safe Store API payload for the final recovery attempt.
      * It keeps only identity, availability and price fields and intentionally