optimize weigths by rag and shop

src/Intent/CommerceIntentLite.php

@@ -14,9 +14,7 @@ final class CommerceIntentLite
 
     public function __construct(
         private readonly CommerceIntentConfig $config
-    )
-    {
-
+    ) {
     }
 
     /**
@@ -34,19 +32,32 @@ final class CommerceIntentLite
             ];
         }
 
+        // Block support / diagnostic questions from entering the commerce flow
+        // unless the prompt also contains very explicit purchase / shop intent.
+        if ($this->isSupportOrDiagnosticQuery($p) && !$this->hasExplicitCommerceIntent($p)) {
+            return [
+                'intent' => self::NONE,
+                'score' => 0,
+                'signals' => ['support_or_diagnostic'],
+            ];
+        }
+
         $score = 0;
         $signals = [];
 
         $strongSignals = $this->config->getStrongSignalsList();
 
         foreach ($strongSignals as $signal) {
-            if (str_contains($p, strtolower($signal))) {
+            if (str_contains($p, mb_strtolower($signal))) {
                 $score += 3;
                 $signals[] = $signal;
             }
         }
 
-        if (preg_match('#\d{3,10}#', $p)) {
+        // Treat long numeric identifiers as stronger product-number-like signals.
+        // This avoids over-triggering commerce purely because a model name contains
+        // a short number such as "808" in support questions.
+        if (preg_match('/\b\d{4,10}\b/u', $p) === 1) {
             $score += 2;
             $signals[] = 'sku';
         }
@@ -78,7 +89,7 @@ final class CommerceIntentLite
         $advisorySignals = $this->config->getAdvisorySignals();
 
         foreach ($advisorySignals as $signal) {
-            if (str_contains($p, $signal)) {
+            if (str_contains($p, mb_strtolower($signal))) {
                 $score += 1;
                 $signals[] = 'advisory:' . $signal;
             }
@@ -109,4 +120,65 @@ final class CommerceIntentLite
         ];
     }
 
+    private function isSupportOrDiagnosticQuery(string $prompt): bool
+    {
+        $patterns = [
+            '/\bfehler\b/u',
+            '/\bfehlercode\b/u',
+            '/\berror\b/u',
+            '/\bstörung\b/u',
+            '/\bstoerung\b/u',
+            '/\balarm\b/u',
+            '/\bstörungsmeldung\b/u',
+            '/\bstoerungsmeldung\b/u',
+            '/\bmeldung\b/u',
+            '/\bwarnung\b/u',
+            '/\bwarncode\b/u',
+            '/\bcode\b/u',
+            '/\bwas bedeutet\b/u',
+            '/\bwarum\b/u',
+            '/\bblinkt\b/u',
+            '/\bzeigt\b/u',
+            '/\bzeigt an\b/u',
+            '/\bursache\b/u',
+            '/\bdiagnose\b/u',
+            '/\bservicefall\b/u',
+            '/\bproblem\b/u',
+            '/\bstörung beheben\b/u',
+            '/\bstoerung beheben\b/u',
+            '/\be\d{1,3}\b/u',
+        ];
+
+        foreach ($patterns as $pattern) {
+            if (preg_match($pattern, $prompt) === 1) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private function hasExplicitCommerceIntent(string $prompt): bool
+    {
+        $patterns = [
+            '/\bshop\b/u',
+            '/\bpreis\b/u',
+            '/\bkosten\b/u',
+            '/\bkostet\b/u',
+            '/\bkaufen\b/u',
+            '/\bbestellen\b/u',
+            '/\bprodukt\b/u',
+            '/\bartikel\b/u',
+            '/\bsku\b/u',
+            '/\bonline\b/u',
+        ];
+
+        foreach ($patterns as $pattern) {
+            if (preg_match($pattern, $prompt) === 1) {
+                return true;
+            }
+        }
+
+        return false;
+    }
 }